/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/popl20-more/max-fun.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 20:34:08,621 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 20:34:08,623 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 20:34:08,657 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-13 20:34:08,705 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 [2021-07-13 20:34:08,734 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 20:34:08,734 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 20:34:08,735 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 20:34:08,735 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 20:34:08,737 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 20:34:08,737 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 20:34:08,737 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 20:34:08,737 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 20:34:08,737 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 20:34:08,737 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 20:34:08,738 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 20:34:08,738 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 20:34:08,738 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 20:34:08,738 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 20:34:08,738 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 20:34:08,738 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 20:34:08,738 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 20:34:08,739 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 20:34:08,739 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 20:34:08,739 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 20:34:08,739 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 20:34:08,739 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 20:34:08,739 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 20:34:08,739 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 20:34:08,739 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 20:34:08,739 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 20:34:08,740 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 20:34:08,740 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 20:34:08,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 20:34:08,740 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 20:34:08,740 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 20:34:08,740 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 20:34:09,007 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 20:34:09,028 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 20:34:09,030 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 20:34:09,031 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-13 20:34:09,032 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-13 20:34:09,032 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/max-fun.wvr.bpl [2021-07-13 20:34:09,032 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/max-fun.wvr.bpl' [2021-07-13 20:34:09,060 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 20:34:09,062 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-13 20:34:09,062 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 20:34:09,062 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 20:34:09,063 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 20:34:09,072 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:34:09" (1/1) ... [2021-07-13 20:34:09,078 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:34:09" (1/1) ... [2021-07-13 20:34:09,084 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 20:34:09,085 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 20:34:09,085 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 20:34:09,085 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 20:34:09,090 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:34:09" (1/1) ... [2021-07-13 20:34:09,091 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:34:09" (1/1) ... [2021-07-13 20:34:09,091 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:34:09" (1/1) ... [2021-07-13 20:34:09,091 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:34:09" (1/1) ... [2021-07-13 20:34:09,093 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:34:09" (1/1) ... [2021-07-13 20:34:09,095 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:34:09" (1/1) ... [2021-07-13 20:34:09,096 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:34:09" (1/1) ... [2021-07-13 20:34:09,100 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 20:34:09,101 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 20:34:09,102 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 20:34:09,102 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 20:34:09,104 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:34:09" (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 [2021-07-13 20:34:09,183 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-13 20:34:09,184 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-13 20:34:09,184 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-13 20:34:09,184 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-13 20:34:09,184 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-13 20:34:09,184 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-13 20:34:09,185 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-13 20:34:09,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 20:34:09,185 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 20:34:09,185 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-13 20:34:09,186 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-13 20:34:09,186 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-13 20:34:09,187 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-13 20:34:09,392 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 20:34:09,393 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-13 20:34:09,394 INFO L202 PluginConnector]: Adding new model max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:34:09 BoogieIcfgContainer [2021-07-13 20:34:09,394 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 20:34:09,395 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 20:34:09,395 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 20:34:09,397 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 20:34:09,398 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:34:09" (1/2) ... [2021-07-13 20:34:09,398 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@89095f8 and model type max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 08:34:09, skipping insertion in model container [2021-07-13 20:34:09,398 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:34:09" (2/2) ... [2021-07-13 20:34:09,399 INFO L111 eAbstractionObserver]: Analyzing ICFG max-fun.wvr.bpl [2021-07-13 20:34:09,403 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 20:34:09,403 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 20:34:09,403 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 20:34:09,403 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 20:34:09,426 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-07-13 20:34:09,442 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-07-13 20:34:09,455 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 20:34:09,455 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 20:34:09,455 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 20:34:09,455 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 20:34:09,455 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 20:34:09,455 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 20:34:09,456 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 20:34:09,456 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 20:34:09,462 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2021-07-13 20:34:09,499 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:09,501 INFO L276 IsEmpty]: Start isEmpty. Operand has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:09,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 20:34:09,511 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:09,511 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:09,511 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:09,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:09,515 INFO L82 PathProgramCache]: Analyzing trace with hash -234684100, now seen corresponding path program 1 times [2021-07-13 20:34:09,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:09,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770438069] [2021-07-13 20:34:09,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:09,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:09,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:09,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:09,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770438069] [2021-07-13 20:34:09,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770438069] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:34:09,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:34:09,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 20:34:09,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295031412] [2021-07-13 20:34:09,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 20:34:09,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:09,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 20:34:09,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:34:09,636 INFO L87 Difference]: Start difference. First operand has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 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 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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) [2021-07-13 20:34:09,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:09,679 INFO L93 Difference]: Finished difference Result 217 states and 617 transitions. [2021-07-13 20:34:09,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 20:34:09,682 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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 [2021-07-13 20:34:09,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:09,696 INFO L225 Difference]: With dead ends: 217 [2021-07-13 20:34:09,696 INFO L226 Difference]: Without dead ends: 202 [2021-07-13 20:34:09,698 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:34:09,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-07-13 20:34:09,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 149. [2021-07-13 20:34:09,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.831081081081081) internal successors, (419), 148 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:09,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 419 transitions. [2021-07-13 20:34:09,753 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 419 transitions. Word has length 18 [2021-07-13 20:34:09,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:09,754 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 419 transitions. [2021-07-13 20:34:09,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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) [2021-07-13 20:34:09,754 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 419 transitions. [2021-07-13 20:34:09,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 20:34:09,759 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:09,759 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] [2021-07-13 20:34:09,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 20:34:09,760 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:09,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:09,763 INFO L82 PathProgramCache]: Analyzing trace with hash -433058596, now seen corresponding path program 1 times [2021-07-13 20:34:09,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:09,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554983993] [2021-07-13 20:34:09,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:09,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:09,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:34:09,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:09,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554983993] [2021-07-13 20:34:09,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554983993] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:34:09,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:34:09,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 20:34:09,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657657735] [2021-07-13 20:34:09,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 20:34:09,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:09,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 20:34:09,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:34:09,838 INFO L87 Difference]: Start difference. First operand 149 states and 419 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:09,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:09,883 INFO L93 Difference]: Finished difference Result 158 states and 445 transitions. [2021-07-13 20:34:09,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 20:34:09,884 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:34:09,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:09,887 INFO L225 Difference]: With dead ends: 158 [2021-07-13 20:34:09,887 INFO L226 Difference]: Without dead ends: 158 [2021-07-13 20:34:09,888 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:34:09,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-07-13 20:34:09,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2021-07-13 20:34:09,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.8333333333333335) internal successors, (374), 132 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:09,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2021-07-13 20:34:09,896 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 20 [2021-07-13 20:34:09,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:09,899 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2021-07-13 20:34:09,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:09,899 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2021-07-13 20:34:09,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 20:34:09,902 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:09,902 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] [2021-07-13 20:34:09,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-13 20:34:09,903 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:09,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:09,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1176026010, now seen corresponding path program 1 times [2021-07-13 20:34:09,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:09,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536498222] [2021-07-13 20:34:09,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:09,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:09,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:34:09,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:09,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536498222] [2021-07-13 20:34:09,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536498222] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:34:09,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:34:09,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 20:34:09,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340596092] [2021-07-13 20:34:09,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 20:34:09,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:09,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 20:34:09,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:34:09,963 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:10,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:10,033 INFO L93 Difference]: Finished difference Result 183 states and 522 transitions. [2021-07-13 20:34:10,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:34:10,034 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:34:10,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:10,035 INFO L225 Difference]: With dead ends: 183 [2021-07-13 20:34:10,035 INFO L226 Difference]: Without dead ends: 183 [2021-07-13 20:34:10,035 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:34:10,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-07-13 20:34:10,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2021-07-13 20:34:10,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8535031847133756) internal successors, (448), 157 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:10,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2021-07-13 20:34:10,042 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2021-07-13 20:34:10,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:10,042 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2021-07-13 20:34:10,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:10,042 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2021-07-13 20:34:10,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 20:34:10,043 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:10,043 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, 1, 1] [2021-07-13 20:34:10,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-13 20:34:10,046 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:10,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:10,047 INFO L82 PathProgramCache]: Analyzing trace with hash -483303622, now seen corresponding path program 1 times [2021-07-13 20:34:10,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:10,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81896069] [2021-07-13 20:34:10,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:10,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:10,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:10,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:10,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81896069] [2021-07-13 20:34:10,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81896069] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:10,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568366113] [2021-07-13 20:34:10,417 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 [2021-07-13 20:34:10,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:10,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:34:10,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:10,678 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 21 treesize of output 13 [2021-07-13 20:34:10,681 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:10,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 10 [2021-07-13 20:34:10,686 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:10,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 10 [2021-07-13 20:34:10,691 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:10,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:10,706 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:34:10,707 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:103, output treesize:21 [2021-07-13 20:34:10,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:10,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568366113] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:10,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:10,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:34:10,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095996896] [2021-07-13 20:34:10,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:34:10,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:10,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:34:10,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:34:10,746 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-07-13 20:34:10,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:10,951 INFO L93 Difference]: Finished difference Result 330 states and 935 transitions. [2021-07-13 20:34:10,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 20:34:10,951 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 22 [2021-07-13 20:34:10,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:10,953 INFO L225 Difference]: With dead ends: 330 [2021-07-13 20:34:10,953 INFO L226 Difference]: Without dead ends: 315 [2021-07-13 20:34:10,953 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 383.8ms TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:34:10,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-07-13 20:34:10,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 224. [2021-07-13 20:34:10,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.8699551569506725) internal successors, (640), 223 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:10,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2021-07-13 20:34:10,963 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2021-07-13 20:34:10,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:10,963 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2021-07-13 20:34:10,963 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-07-13 20:34:10,963 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2021-07-13 20:34:10,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 20:34:10,964 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:10,964 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, 1, 1] [2021-07-13 20:34:11,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:11,182 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:11,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:11,182 INFO L82 PathProgramCache]: Analyzing trace with hash -651112714, now seen corresponding path program 2 times [2021-07-13 20:34:11,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:11,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166217633] [2021-07-13 20:34:11,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:11,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:11,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:11,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:11,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166217633] [2021-07-13 20:34:11,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166217633] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:11,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95223555] [2021-07-13 20:34:11,470 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 [2021-07-13 20:34:11,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:34:11,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:11,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:34:11,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:11,755 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:34:11,755 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-07-13 20:34:11,758 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:11,767 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:34:11,768 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-07-13 20:34:11,769 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:11,779 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:11,779 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-13 20:34:11,793 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:11,800 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:11,801 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-07-13 20:34:11,802 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:11,845 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:11,857 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 20:34:11,857 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:125, output treesize:83 [2021-07-13 20:34:11,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:11,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95223555] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:11,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:11,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-07-13 20:34:11,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734851883] [2021-07-13 20:34:11,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:34:11,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:11,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:34:11,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:34:11,982 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:12,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:12,516 INFO L93 Difference]: Finished difference Result 374 states and 1077 transitions. [2021-07-13 20:34:12,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 20:34:12,517 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:34:12,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:12,519 INFO L225 Difference]: With dead ends: 374 [2021-07-13 20:34:12,519 INFO L226 Difference]: Without dead ends: 359 [2021-07-13 20:34:12,519 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 696.9ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:34:12,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-07-13 20:34:12,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 229. [2021-07-13 20:34:12,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.912280701754386) internal successors, (664), 228 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:12,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2021-07-13 20:34:12,526 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2021-07-13 20:34:12,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:12,527 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2021-07-13 20:34:12,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:12,527 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2021-07-13 20:34:12,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 20:34:12,527 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:12,528 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, 1, 1] [2021-07-13 20:34:12,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:12,741 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:12,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:12,741 INFO L82 PathProgramCache]: Analyzing trace with hash -352339266, now seen corresponding path program 3 times [2021-07-13 20:34:12,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:12,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609175735] [2021-07-13 20:34:12,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:12,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:12,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:12,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:12,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609175735] [2021-07-13 20:34:12,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609175735] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:12,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847448609] [2021-07-13 20:34:12,919 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 [2021-07-13 20:34:12,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 20:34:12,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:12,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 20:34:12,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:13,054 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 16 treesize of output 10 [2021-07-13 20:34:13,058 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:13,061 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 16 treesize of output 10 [2021-07-13 20:34:13,062 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:13,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:34:13,066 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:13,068 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 16 treesize of output 10 [2021-07-13 20:34:13,069 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:13,074 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 20:34:13,075 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:13,083 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 21 treesize of output 13 [2021-07-13 20:34:13,085 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:13,106 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-07-13 20:34:13,107 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:34:13,107 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:145, output treesize:21 [2021-07-13 20:34:13,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:13,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847448609] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:13,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:13,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 20:34:13,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38490084] [2021-07-13 20:34:13,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:34:13,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:13,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:34:13,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:34:13,155 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:13,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:13,312 INFO L93 Difference]: Finished difference Result 296 states and 831 transitions. [2021-07-13 20:34:13,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:34:13,313 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:34:13,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:13,314 INFO L225 Difference]: With dead ends: 296 [2021-07-13 20:34:13,314 INFO L226 Difference]: Without dead ends: 281 [2021-07-13 20:34:13,314 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 269.4ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:34:13,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-07-13 20:34:13,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 241. [2021-07-13 20:34:13,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.8916666666666666) internal successors, (694), 240 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:13,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2021-07-13 20:34:13,323 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2021-07-13 20:34:13,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:13,323 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2021-07-13 20:34:13,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:13,323 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2021-07-13 20:34:13,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 20:34:13,324 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:13,324 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, 1, 1] [2021-07-13 20:34:13,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-07-13 20:34:13,543 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:13,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:13,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1218486334, now seen corresponding path program 4 times [2021-07-13 20:34:13,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:13,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632901579] [2021-07-13 20:34:13,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:13,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:13,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:13,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:13,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632901579] [2021-07-13 20:34:13,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632901579] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:13,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266657415] [2021-07-13 20:34:13,709 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 [2021-07-13 20:34:13,750 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:34:13,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:13,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:34:13,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:13,935 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:34:13,935 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-07-13 20:34:13,937 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:13,944 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:13,945 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-13 20:34:13,950 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:13,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:14,007 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:14,008 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-07-13 20:34:14,028 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:14,035 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:34:14,036 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-07-13 20:34:14,037 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:14,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:14,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 20:34:14,088 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:133, output treesize:83 [2021-07-13 20:34:14,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:14,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266657415] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:14,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:14,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:34:14,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789850307] [2021-07-13 20:34:14,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:34:14,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:14,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:34:14,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:34:14,199 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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) [2021-07-13 20:34:14,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:14,546 INFO L93 Difference]: Finished difference Result 409 states and 1185 transitions. [2021-07-13 20:34:14,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 20:34:14,546 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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 22 [2021-07-13 20:34:14,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:14,548 INFO L225 Difference]: With dead ends: 409 [2021-07-13 20:34:14,548 INFO L226 Difference]: Without dead ends: 394 [2021-07-13 20:34:14,549 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 441.7ms TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:34:14,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-07-13 20:34:14,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 247. [2021-07-13 20:34:14,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9186991869918697) internal successors, (718), 246 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:14,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2021-07-13 20:34:14,554 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2021-07-13 20:34:14,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:14,554 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2021-07-13 20:34:14,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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) [2021-07-13 20:34:14,555 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2021-07-13 20:34:14,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:34:14,555 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:14,555 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:14,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:14,773 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:14,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:14,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1613936552, now seen corresponding path program 5 times [2021-07-13 20:34:14,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:14,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970651503] [2021-07-13 20:34:14,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:14,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:14,837 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:14,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:14,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970651503] [2021-07-13 20:34:14,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970651503] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:14,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429763317] [2021-07-13 20:34:14,837 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 [2021-07-13 20:34:14,862 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:34:14,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:14,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:34:14,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:14,988 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:14,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429763317] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:14,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:14,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:34:14,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524818547] [2021-07-13 20:34:14,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:34:14,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:14,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:34:14,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:34:14,990 INFO L87 Difference]: Start difference. First operand 247 states and 718 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-07-13 20:34:15,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:15,363 INFO L93 Difference]: Finished difference Result 619 states and 1783 transitions. [2021-07-13 20:34:15,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:34:15,364 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 [2021-07-13 20:34:15,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:15,366 INFO L225 Difference]: With dead ends: 619 [2021-07-13 20:34:15,366 INFO L226 Difference]: Without dead ends: 619 [2021-07-13 20:34:15,367 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 286.3ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:34:15,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-07-13 20:34:15,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 297. [2021-07-13 20:34:15,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.050675675675676) internal successors, (903), 296 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:15,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 903 transitions. [2021-07-13 20:34:15,374 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 903 transitions. Word has length 24 [2021-07-13 20:34:15,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:15,374 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 903 transitions. [2021-07-13 20:34:15,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-07-13 20:34:15,374 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 903 transitions. [2021-07-13 20:34:15,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:34:15,375 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:15,375 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:15,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-07-13 20:34:15,592 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:15,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:15,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1704711900, now seen corresponding path program 6 times [2021-07-13 20:34:15,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:15,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528792643] [2021-07-13 20:34:15,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:15,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:15,626 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:15,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:15,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528792643] [2021-07-13 20:34:15,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528792643] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:15,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58712745] [2021-07-13 20:34:15,627 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 [2021-07-13 20:34:15,694 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:34:15,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:15,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:34:15,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:15,788 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:15,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58712745] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:15,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:15,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:34:15,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693376084] [2021-07-13 20:34:15,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:34:15,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:15,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:34:15,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:34:15,789 INFO L87 Difference]: Start difference. First operand 297 states and 903 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-07-13 20:34:16,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:16,567 INFO L93 Difference]: Finished difference Result 1078 states and 2992 transitions. [2021-07-13 20:34:16,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:34:16,567 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 [2021-07-13 20:34:16,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:16,571 INFO L225 Difference]: With dead ends: 1078 [2021-07-13 20:34:16,572 INFO L226 Difference]: Without dead ends: 1078 [2021-07-13 20:34:16,572 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 482.6ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:34:16,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-07-13 20:34:16,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 302. [2021-07-13 20:34:16,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.083056478405316) internal successors, (928), 301 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:16,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 928 transitions. [2021-07-13 20:34:16,598 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 928 transitions. Word has length 24 [2021-07-13 20:34:16,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:16,598 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 928 transitions. [2021-07-13 20:34:16,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-07-13 20:34:16,599 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 928 transitions. [2021-07-13 20:34:16,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:34:16,599 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:16,600 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:16,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:16,817 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:16,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:16,817 INFO L82 PathProgramCache]: Analyzing trace with hash -2023303316, now seen corresponding path program 7 times [2021-07-13 20:34:16,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:16,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521843705] [2021-07-13 20:34:16,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:16,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:16,865 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:16,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:16,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521843705] [2021-07-13 20:34:16,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521843705] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:16,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376378037] [2021-07-13 20:34:16,866 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 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 [2021-07-13 20:34:16,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:16,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:34:16,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:17,006 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:17,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376378037] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:17,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:17,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:34:17,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847964074] [2021-07-13 20:34:17,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:34:17,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:17,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:34:17,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:34:17,008 INFO L87 Difference]: Start difference. First operand 302 states and 928 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-07-13 20:34:17,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:17,678 INFO L93 Difference]: Finished difference Result 951 states and 2692 transitions. [2021-07-13 20:34:17,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:34:17,679 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 [2021-07-13 20:34:17,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:17,684 INFO L225 Difference]: With dead ends: 951 [2021-07-13 20:34:17,684 INFO L226 Difference]: Without dead ends: 951 [2021-07-13 20:34:17,685 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 411.5ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:34:17,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-07-13 20:34:17,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 293. [2021-07-13 20:34:17,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 3.0616438356164384) internal successors, (894), 292 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:17,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 894 transitions. [2021-07-13 20:34:17,694 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 894 transitions. Word has length 24 [2021-07-13 20:34:17,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:17,694 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 894 transitions. [2021-07-13 20:34:17,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-07-13 20:34:17,695 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 894 transitions. [2021-07-13 20:34:17,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:34:17,695 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:17,695 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, 1, 1, 1, 1] [2021-07-13 20:34:17,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:17,909 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:17,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:17,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1087164644, now seen corresponding path program 1 times [2021-07-13 20:34:17,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:17,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684440933] [2021-07-13 20:34:17,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:17,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:17,936 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:34:17,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:17,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684440933] [2021-07-13 20:34:17,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684440933] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:17,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320962063] [2021-07-13 20:34:17,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-07-13 20:34:17,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:17,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 20:34:17,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:18,026 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:34:18,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320962063] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:18,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:18,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-13 20:34:18,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896079938] [2021-07-13 20:34:18,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:34:18,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:18,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:34:18,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:34:18,029 INFO L87 Difference]: Start difference. First operand 293 states and 894 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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) [2021-07-13 20:34:18,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:18,129 INFO L93 Difference]: Finished difference Result 669 states and 1943 transitions. [2021-07-13 20:34:18,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:34:18,129 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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 [2021-07-13 20:34:18,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:18,132 INFO L225 Difference]: With dead ends: 669 [2021-07-13 20:34:18,132 INFO L226 Difference]: Without dead ends: 663 [2021-07-13 20:34:18,133 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 55.3ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:34:18,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-07-13 20:34:18,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 413. [2021-07-13 20:34:18,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 3.1699029126213594) internal successors, (1306), 412 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:18,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1306 transitions. [2021-07-13 20:34:18,143 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1306 transitions. Word has length 24 [2021-07-13 20:34:18,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:18,143 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 1306 transitions. [2021-07-13 20:34:18,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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) [2021-07-13 20:34:18,143 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1306 transitions. [2021-07-13 20:34:18,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:34:18,144 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:18,144 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:18,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-07-13 20:34:18,367 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:18,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:18,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1524133352, now seen corresponding path program 8 times [2021-07-13 20:34:18,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:18,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193327319] [2021-07-13 20:34:18,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:18,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:18,413 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:18,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:18,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193327319] [2021-07-13 20:34:18,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193327319] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:18,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926040120] [2021-07-13 20:34:18,413 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 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 [2021-07-13 20:34:18,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:34:18,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:18,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:34:18,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:18,743 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:18,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926040120] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:18,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:18,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-13 20:34:18,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440239880] [2021-07-13 20:34:18,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:34:18,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:18,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:34:18,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:34:18,744 INFO L87 Difference]: Start difference. First operand 413 states and 1306 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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) [2021-07-13 20:34:18,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:18,919 INFO L93 Difference]: Finished difference Result 710 states and 2124 transitions. [2021-07-13 20:34:18,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:34:18,920 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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 [2021-07-13 20:34:18,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:18,923 INFO L225 Difference]: With dead ends: 710 [2021-07-13 20:34:18,923 INFO L226 Difference]: Without dead ends: 672 [2021-07-13 20:34:18,923 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 200.2ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:34:18,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-07-13 20:34:18,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 515. [2021-07-13 20:34:18,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 3.17704280155642) internal successors, (1633), 514 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:18,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1633 transitions. [2021-07-13 20:34:18,933 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1633 transitions. Word has length 24 [2021-07-13 20:34:18,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:18,934 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1633 transitions. [2021-07-13 20:34:18,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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) [2021-07-13 20:34:18,934 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1633 transitions. [2021-07-13 20:34:18,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:34:18,935 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:18,935 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, 1, 1, 1, 1] [2021-07-13 20:34:19,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:19,158 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:19,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:19,158 INFO L82 PathProgramCache]: Analyzing trace with hash 2064876612, now seen corresponding path program 2 times [2021-07-13 20:34:19,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:19,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473848079] [2021-07-13 20:34:19,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:19,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:19,179 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:34:19,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:19,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473848079] [2021-07-13 20:34:19,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473848079] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:19,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814935401] [2021-07-13 20:34:19,179 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 20:34:19,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:34:19,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:19,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 20:34:19,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:19,256 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:34:19,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814935401] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:19,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:19,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-13 20:34:19,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449162310] [2021-07-13 20:34:19,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:34:19,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:19,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:34:19,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:34:19,258 INFO L87 Difference]: Start difference. First operand 515 states and 1633 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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) [2021-07-13 20:34:19,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:19,350 INFO L93 Difference]: Finished difference Result 830 states and 2453 transitions. [2021-07-13 20:34:19,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:34:19,350 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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 [2021-07-13 20:34:19,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:19,353 INFO L225 Difference]: With dead ends: 830 [2021-07-13 20:34:19,353 INFO L226 Difference]: Without dead ends: 830 [2021-07-13 20:34:19,354 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 62.6ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:34:19,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-07-13 20:34:19,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 530. [2021-07-13 20:34:19,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 3.153119092627599) internal successors, (1668), 529 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:19,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1668 transitions. [2021-07-13 20:34:19,367 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1668 transitions. Word has length 24 [2021-07-13 20:34:19,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:19,367 INFO L482 AbstractCegarLoop]: Abstraction has 530 states and 1668 transitions. [2021-07-13 20:34:19,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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) [2021-07-13 20:34:19,367 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1668 transitions. [2021-07-13 20:34:19,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:34:19,368 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:19,368 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:19,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-07-13 20:34:19,586 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:19,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:19,586 INFO L82 PathProgramCache]: Analyzing trace with hash 718195046, now seen corresponding path program 9 times [2021-07-13 20:34:19,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:19,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233149597] [2021-07-13 20:34:19,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:19,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:19,620 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:19,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:19,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233149597] [2021-07-13 20:34:19,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233149597] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:19,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14610183] [2021-07-13 20:34:19,621 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 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 [2021-07-13 20:34:19,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:34:19,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:19,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:34:19,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:19,745 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:19,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14610183] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:19,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:19,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:34:19,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416477645] [2021-07-13 20:34:19,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:34:19,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:19,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:34:19,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:34:19,747 INFO L87 Difference]: Start difference. First operand 530 states and 1668 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-07-13 20:34:19,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:19,982 INFO L93 Difference]: Finished difference Result 1196 states and 3492 transitions. [2021-07-13 20:34:19,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:34:19,983 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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 [2021-07-13 20:34:19,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:19,988 INFO L225 Difference]: With dead ends: 1196 [2021-07-13 20:34:19,989 INFO L226 Difference]: Without dead ends: 1196 [2021-07-13 20:34:19,989 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 122.2ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:34:19,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-07-13 20:34:20,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 542. [2021-07-13 20:34:20,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 3.1497227356746764) internal successors, (1704), 541 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:20,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1704 transitions. [2021-07-13 20:34:20,013 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1704 transitions. Word has length 24 [2021-07-13 20:34:20,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:20,013 INFO L482 AbstractCegarLoop]: Abstraction has 542 states and 1704 transitions. [2021-07-13 20:34:20,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-07-13 20:34:20,013 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1704 transitions. [2021-07-13 20:34:20,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:34:20,014 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:20,014 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:20,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-07-13 20:34:20,229 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:20,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:20,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1503109140, now seen corresponding path program 10 times [2021-07-13 20:34:20,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:20,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257161757] [2021-07-13 20:34:20,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:20,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:20,268 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:20,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:20,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257161757] [2021-07-13 20:34:20,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257161757] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:20,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385296863] [2021-07-13 20:34:20,268 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 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 [2021-07-13 20:34:20,313 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:34:20,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:20,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:34:20,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:20,379 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:20,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385296863] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:20,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:20,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:34:20,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041923494] [2021-07-13 20:34:20,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:34:20,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:20,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:34:20,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:34:20,381 INFO L87 Difference]: Start difference. First operand 542 states and 1704 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-07-13 20:34:20,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:20,776 INFO L93 Difference]: Finished difference Result 1492 states and 4245 transitions. [2021-07-13 20:34:20,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 20:34:20,776 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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 [2021-07-13 20:34:20,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:20,782 INFO L225 Difference]: With dead ends: 1492 [2021-07-13 20:34:20,782 INFO L226 Difference]: Without dead ends: 1492 [2021-07-13 20:34:20,783 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 237.9ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:34:20,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-07-13 20:34:20,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 586. [2021-07-13 20:34:20,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 3.1555555555555554) internal successors, (1846), 585 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:20,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1846 transitions. [2021-07-13 20:34:20,801 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1846 transitions. Word has length 24 [2021-07-13 20:34:20,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:20,801 INFO L482 AbstractCegarLoop]: Abstraction has 586 states and 1846 transitions. [2021-07-13 20:34:20,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-07-13 20:34:20,801 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1846 transitions. [2021-07-13 20:34:20,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:34:20,802 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:20,802 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:21,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-07-13 20:34:21,019 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:21,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:21,019 INFO L82 PathProgramCache]: Analyzing trace with hash 420086484, now seen corresponding path program 11 times [2021-07-13 20:34:21,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:21,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525286671] [2021-07-13 20:34:21,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:21,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:21,070 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:21,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:21,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525286671] [2021-07-13 20:34:21,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525286671] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:21,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914920681] [2021-07-13 20:34:21,071 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 20:34:21,111 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:34:21,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:21,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:34:21,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:21,180 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:21,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914920681] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:21,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:21,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-13 20:34:21,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682513161] [2021-07-13 20:34:21,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:34:21,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:21,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:34:21,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:34:21,181 INFO L87 Difference]: Start difference. First operand 586 states and 1846 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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) [2021-07-13 20:34:21,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:21,403 INFO L93 Difference]: Finished difference Result 1258 states and 3765 transitions. [2021-07-13 20:34:21,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:34:21,404 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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 [2021-07-13 20:34:21,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:21,408 INFO L225 Difference]: With dead ends: 1258 [2021-07-13 20:34:21,408 INFO L226 Difference]: Without dead ends: 1248 [2021-07-13 20:34:21,409 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 143.1ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:34:21,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-07-13 20:34:21,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 758. [2021-07-13 20:34:21,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.224570673712021) internal successors, (2441), 757 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:21,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2441 transitions. [2021-07-13 20:34:21,426 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2441 transitions. Word has length 24 [2021-07-13 20:34:21,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:21,426 INFO L482 AbstractCegarLoop]: Abstraction has 758 states and 2441 transitions. [2021-07-13 20:34:21,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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) [2021-07-13 20:34:21,426 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2441 transitions. [2021-07-13 20:34:21,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:34:21,428 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:21,428 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:21,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-07-13 20:34:21,644 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:21,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:21,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1891164602, now seen corresponding path program 12 times [2021-07-13 20:34:21,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:21,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618426906] [2021-07-13 20:34:21,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:21,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:21,674 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:21,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:21,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618426906] [2021-07-13 20:34:21,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618426906] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:21,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600172872] [2021-07-13 20:34:21,675 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 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 [2021-07-13 20:34:21,720 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:34:21,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:21,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:34:21,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:21,787 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:21,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600172872] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:21,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:21,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-13 20:34:21,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260217911] [2021-07-13 20:34:21,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:34:21,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:21,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:34:21,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:34:21,788 INFO L87 Difference]: Start difference. First operand 758 states and 2441 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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) [2021-07-13 20:34:22,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:22,053 INFO L93 Difference]: Finished difference Result 1329 states and 4025 transitions. [2021-07-13 20:34:22,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:34:22,053 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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 [2021-07-13 20:34:22,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:22,058 INFO L225 Difference]: With dead ends: 1329 [2021-07-13 20:34:22,058 INFO L226 Difference]: Without dead ends: 1329 [2021-07-13 20:34:22,059 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 169.2ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:34:22,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-07-13 20:34:22,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 764. [2021-07-13 20:34:22,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 3.220183486238532) internal successors, (2457), 763 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:22,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2457 transitions. [2021-07-13 20:34:22,076 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2457 transitions. Word has length 24 [2021-07-13 20:34:22,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:22,076 INFO L482 AbstractCegarLoop]: Abstraction has 764 states and 2457 transitions. [2021-07-13 20:34:22,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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) [2021-07-13 20:34:22,077 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2457 transitions. [2021-07-13 20:34:22,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:34:22,078 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:22,078 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:22,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:22,295 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:22,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:22,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1458287998, now seen corresponding path program 13 times [2021-07-13 20:34:22,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:22,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260720364] [2021-07-13 20:34:22,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:22,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:22,333 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:22,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:22,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260720364] [2021-07-13 20:34:22,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260720364] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:22,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024155707] [2021-07-13 20:34:22,334 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 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 [2021-07-13 20:34:22,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:22,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:34:22,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:22,461 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:22,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024155707] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:22,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:22,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:34:22,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341972472] [2021-07-13 20:34:22,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:34:22,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:22,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:34:22,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:34:22,462 INFO L87 Difference]: Start difference. First operand 764 states and 2457 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-07-13 20:34:22,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:22,848 INFO L93 Difference]: Finished difference Result 1548 states and 4638 transitions. [2021-07-13 20:34:22,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:34:22,848 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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 [2021-07-13 20:34:22,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:22,855 INFO L225 Difference]: With dead ends: 1548 [2021-07-13 20:34:22,855 INFO L226 Difference]: Without dead ends: 1544 [2021-07-13 20:34:22,869 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 212.9ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:34:22,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-07-13 20:34:22,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 772. [2021-07-13 20:34:22,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.204928664072633) internal successors, (2471), 771 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:22,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2471 transitions. [2021-07-13 20:34:22,908 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2471 transitions. Word has length 24 [2021-07-13 20:34:22,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:22,908 INFO L482 AbstractCegarLoop]: Abstraction has 772 states and 2471 transitions. [2021-07-13 20:34:22,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-07-13 20:34:22,908 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2471 transitions. [2021-07-13 20:34:22,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:34:22,910 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:22,910 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:23,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:23,127 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:23,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:23,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1186278808, now seen corresponding path program 14 times [2021-07-13 20:34:23,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:23,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267212562] [2021-07-13 20:34:23,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:23,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:23,162 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:23,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:23,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267212562] [2021-07-13 20:34:23,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267212562] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:23,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423249096] [2021-07-13 20:34:23,163 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 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 [2021-07-13 20:34:23,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:34:23,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:23,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:34:23,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:23,259 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:23,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423249096] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:23,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:23,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:34:23,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031648618] [2021-07-13 20:34:23,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:34:23,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:23,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:34:23,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:34:23,261 INFO L87 Difference]: Start difference. First operand 772 states and 2471 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-07-13 20:34:24,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:24,008 INFO L93 Difference]: Finished difference Result 2734 states and 8136 transitions. [2021-07-13 20:34:24,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 20:34:24,009 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 [2021-07-13 20:34:24,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:24,019 INFO L225 Difference]: With dead ends: 2734 [2021-07-13 20:34:24,019 INFO L226 Difference]: Without dead ends: 2734 [2021-07-13 20:34:24,020 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 423.0ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:34:24,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-07-13 20:34:24,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 841. [2021-07-13 20:34:24,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 3.3107142857142855) internal successors, (2781), 840 states have internal predecessors, (2781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:24,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2781 transitions. [2021-07-13 20:34:24,048 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2781 transitions. Word has length 24 [2021-07-13 20:34:24,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:24,048 INFO L482 AbstractCegarLoop]: Abstraction has 841 states and 2781 transitions. [2021-07-13 20:34:24,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-07-13 20:34:24,048 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2781 transitions. [2021-07-13 20:34:24,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:34:24,050 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:24,050 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:24,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:24,253 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:24,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:24,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1753230888, now seen corresponding path program 15 times [2021-07-13 20:34:24,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:24,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878495759] [2021-07-13 20:34:24,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:24,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:24,296 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:24,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:24,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878495759] [2021-07-13 20:34:24,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878495759] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:24,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889602155] [2021-07-13 20:34:24,296 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 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 [2021-07-13 20:34:24,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:34:24,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:24,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:34:24,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:24,411 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:24,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889602155] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:24,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:24,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:34:24,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317042790] [2021-07-13 20:34:24,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:34:24,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:24,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:34:24,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:34:24,413 INFO L87 Difference]: Start difference. First operand 841 states and 2781 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-07-13 20:34:25,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:25,144 INFO L93 Difference]: Finished difference Result 2693 states and 8043 transitions. [2021-07-13 20:34:25,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 20:34:25,144 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 [2021-07-13 20:34:25,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:25,152 INFO L225 Difference]: With dead ends: 2693 [2021-07-13 20:34:25,152 INFO L226 Difference]: Without dead ends: 2693 [2021-07-13 20:34:25,153 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 419.7ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:34:25,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-07-13 20:34:25,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 831. [2021-07-13 20:34:25,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 3.289156626506024) internal successors, (2730), 830 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:25,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2730 transitions. [2021-07-13 20:34:25,181 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2730 transitions. Word has length 24 [2021-07-13 20:34:25,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:25,181 INFO L482 AbstractCegarLoop]: Abstraction has 831 states and 2730 transitions. [2021-07-13 20:34:25,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-07-13 20:34:25,181 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2730 transitions. [2021-07-13 20:34:25,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:34:25,183 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:25,183 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:25,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-07-13 20:34:25,412 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:25,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:25,413 INFO L82 PathProgramCache]: Analyzing trace with hash 580885030, now seen corresponding path program 16 times [2021-07-13 20:34:25,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:25,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990520949] [2021-07-13 20:34:25,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:25,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:25,447 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:25,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:25,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990520949] [2021-07-13 20:34:25,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990520949] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:25,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896779300] [2021-07-13 20:34:25,447 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 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 [2021-07-13 20:34:25,472 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:34:25,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:25,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:34:25,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:25,535 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:25,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896779300] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:25,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:25,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:34:25,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447757686] [2021-07-13 20:34:25,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:34:25,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:25,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:34:25,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:34:25,536 INFO L87 Difference]: Start difference. First operand 831 states and 2730 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-07-13 20:34:26,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:26,158 INFO L93 Difference]: Finished difference Result 2677 states and 7780 transitions. [2021-07-13 20:34:26,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:34:26,158 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 [2021-07-13 20:34:26,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:26,164 INFO L225 Difference]: With dead ends: 2677 [2021-07-13 20:34:26,165 INFO L226 Difference]: Without dead ends: 2677 [2021-07-13 20:34:26,165 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 363.3ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:34:26,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-07-13 20:34:26,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 845. [2021-07-13 20:34:26,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2997630331753554) internal successors, (2785), 844 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:26,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2785 transitions. [2021-07-13 20:34:26,195 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2785 transitions. Word has length 24 [2021-07-13 20:34:26,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:26,195 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2785 transitions. [2021-07-13 20:34:26,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-07-13 20:34:26,195 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2785 transitions. [2021-07-13 20:34:26,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:34:26,197 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:26,197 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:26,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-07-13 20:34:26,405 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:26,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:26,405 INFO L82 PathProgramCache]: Analyzing trace with hash 662261118, now seen corresponding path program 17 times [2021-07-13 20:34:26,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:26,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071954302] [2021-07-13 20:34:26,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:26,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:26,440 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:26,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:26,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071954302] [2021-07-13 20:34:26,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071954302] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:26,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895744330] [2021-07-13 20:34:26,441 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 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 [2021-07-13 20:34:26,470 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:34:26,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:26,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:34:26,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:26,528 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:26,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895744330] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:26,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:26,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:34:26,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123652517] [2021-07-13 20:34:26,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:34:26,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:26,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:34:26,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:34:26,529 INFO L87 Difference]: Start difference. First operand 845 states and 2785 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-07-13 20:34:27,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:27,110 INFO L93 Difference]: Finished difference Result 2474 states and 7308 transitions. [2021-07-13 20:34:27,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:34:27,110 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 [2021-07-13 20:34:27,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:27,115 INFO L225 Difference]: With dead ends: 2474 [2021-07-13 20:34:27,116 INFO L226 Difference]: Without dead ends: 2470 [2021-07-13 20:34:27,116 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 325.7ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:34:27,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-07-13 20:34:27,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 845. [2021-07-13 20:34:27,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2973933649289098) internal successors, (2783), 844 states have internal predecessors, (2783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:27,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2783 transitions. [2021-07-13 20:34:27,147 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2783 transitions. Word has length 24 [2021-07-13 20:34:27,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:27,147 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2783 transitions. [2021-07-13 20:34:27,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-07-13 20:34:27,147 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2783 transitions. [2021-07-13 20:34:27,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:34:27,149 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:27,149 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:27,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-07-13 20:34:27,366 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:27,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:27,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1592918334, now seen corresponding path program 18 times [2021-07-13 20:34:27,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:27,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789840600] [2021-07-13 20:34:27,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:27,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:27,403 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:27,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:27,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789840600] [2021-07-13 20:34:27,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789840600] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:27,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044576232] [2021-07-13 20:34:27,403 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 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 [2021-07-13 20:34:27,486 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:34:27,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:27,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:34:27,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:27,556 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:27,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044576232] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:27,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:27,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:34:27,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068364141] [2021-07-13 20:34:27,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:34:27,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:27,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:34:27,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:34:27,557 INFO L87 Difference]: Start difference. First operand 845 states and 2783 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-07-13 20:34:28,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:28,185 INFO L93 Difference]: Finished difference Result 2514 states and 7408 transitions. [2021-07-13 20:34:28,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:34:28,185 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 [2021-07-13 20:34:28,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:28,192 INFO L225 Difference]: With dead ends: 2514 [2021-07-13 20:34:28,192 INFO L226 Difference]: Without dead ends: 2514 [2021-07-13 20:34:28,193 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 361.9ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:34:28,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-07-13 20:34:28,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 853. [2021-07-13 20:34:28,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.3039906103286385) internal successors, (2815), 852 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:28,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2815 transitions. [2021-07-13 20:34:28,228 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2815 transitions. Word has length 24 [2021-07-13 20:34:28,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:28,228 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2815 transitions. [2021-07-13 20:34:28,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-07-13 20:34:28,229 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2815 transitions. [2021-07-13 20:34:28,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:34:28,231 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:28,231 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:28,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-07-13 20:34:28,445 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:28,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:28,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1059009808, now seen corresponding path program 19 times [2021-07-13 20:34:28,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:28,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199711299] [2021-07-13 20:34:28,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:28,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:28,478 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:28,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:28,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199711299] [2021-07-13 20:34:28,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199711299] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:28,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901168924] [2021-07-13 20:34:28,478 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 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 [2021-07-13 20:34:28,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:28,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:34:28,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:28,646 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:28,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901168924] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:28,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:28,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:34:28,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157658369] [2021-07-13 20:34:28,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:34:28,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:28,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:34:28,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:34:28,649 INFO L87 Difference]: Start difference. First operand 853 states and 2815 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-07-13 20:34:29,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:29,242 INFO L93 Difference]: Finished difference Result 2332 states and 6984 transitions. [2021-07-13 20:34:29,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:34:29,242 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 [2021-07-13 20:34:29,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:29,249 INFO L225 Difference]: With dead ends: 2332 [2021-07-13 20:34:29,249 INFO L226 Difference]: Without dead ends: 2328 [2021-07-13 20:34:29,250 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 337.8ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:34:29,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-07-13 20:34:29,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 853. [2021-07-13 20:34:29,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.301643192488263) internal successors, (2813), 852 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:29,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2813 transitions. [2021-07-13 20:34:29,276 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2813 transitions. Word has length 24 [2021-07-13 20:34:29,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:29,277 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2813 transitions. [2021-07-13 20:34:29,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-07-13 20:34:29,277 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2813 transitions. [2021-07-13 20:34:29,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:34:29,279 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:29,279 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, 1, 1, 1, 1] [2021-07-13 20:34:29,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-07-13 20:34:29,496 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:29,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:29,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1971295360, now seen corresponding path program 3 times [2021-07-13 20:34:29,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:29,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526088536] [2021-07-13 20:34:29,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:29,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:29,520 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:34:29,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:29,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526088536] [2021-07-13 20:34:29,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526088536] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:29,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993812439] [2021-07-13 20:34:29,521 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 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 [2021-07-13 20:34:29,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 20:34:29,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:29,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 20:34:29,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:29,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:34:29,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993812439] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:29,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:29,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-13 20:34:29,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281900640] [2021-07-13 20:34:29,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:34:29,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:29,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:34:29,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:34:29,606 INFO L87 Difference]: Start difference. First operand 853 states and 2813 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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) [2021-07-13 20:34:29,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:29,682 INFO L93 Difference]: Finished difference Result 929 states and 3034 transitions. [2021-07-13 20:34:29,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:34:29,683 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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 [2021-07-13 20:34:29,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:29,699 INFO L225 Difference]: With dead ends: 929 [2021-07-13 20:34:29,699 INFO L226 Difference]: Without dead ends: 929 [2021-07-13 20:34:29,699 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 49.1ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:34:29,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-07-13 20:34:29,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 780. [2021-07-13 20:34:29,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.3029525032092426) internal successors, (2573), 779 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:29,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2573 transitions. [2021-07-13 20:34:29,711 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2573 transitions. Word has length 24 [2021-07-13 20:34:29,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:29,712 INFO L482 AbstractCegarLoop]: Abstraction has 780 states and 2573 transitions. [2021-07-13 20:34:29,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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) [2021-07-13 20:34:29,712 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2573 transitions. [2021-07-13 20:34:29,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:34:29,713 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:29,713 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:29,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:29,929 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:29,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:29,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1041095616, now seen corresponding path program 20 times [2021-07-13 20:34:29,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:29,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262282096] [2021-07-13 20:34:29,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:29,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:29,962 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:29,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:29,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262282096] [2021-07-13 20:34:29,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262282096] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:29,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510649792] [2021-07-13 20:34:29,962 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 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 [2021-07-13 20:34:29,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:34:29,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:29,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:34:29,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:30,035 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:30,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510649792] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:30,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:30,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-13 20:34:30,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902899621] [2021-07-13 20:34:30,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:34:30,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:30,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:34:30,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:34:30,037 INFO L87 Difference]: Start difference. First operand 780 states and 2573 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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) [2021-07-13 20:34:30,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:30,309 INFO L93 Difference]: Finished difference Result 1555 states and 4761 transitions. [2021-07-13 20:34:30,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:34:30,309 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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 [2021-07-13 20:34:30,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:30,313 INFO L225 Difference]: With dead ends: 1555 [2021-07-13 20:34:30,313 INFO L226 Difference]: Without dead ends: 1555 [2021-07-13 20:34:30,313 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 147.4ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:34:30,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-07-13 20:34:30,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 842. [2021-07-13 20:34:30,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 3.296076099881094) internal successors, (2772), 841 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:30,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2772 transitions. [2021-07-13 20:34:30,331 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2772 transitions. Word has length 24 [2021-07-13 20:34:30,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:30,332 INFO L482 AbstractCegarLoop]: Abstraction has 842 states and 2772 transitions. [2021-07-13 20:34:30,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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) [2021-07-13 20:34:30,332 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2772 transitions. [2021-07-13 20:34:30,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:34:30,333 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:30,333 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:30,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:30,553 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:30,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:30,553 INFO L82 PathProgramCache]: Analyzing trace with hash 861583836, now seen corresponding path program 21 times [2021-07-13 20:34:30,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:30,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114433167] [2021-07-13 20:34:30,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:30,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:30,578 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:30,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:30,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114433167] [2021-07-13 20:34:30,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114433167] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:30,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200485344] [2021-07-13 20:34:30,579 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 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 [2021-07-13 20:34:30,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:34:30,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:30,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:34:30,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:30,651 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:30,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200485344] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:30,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:30,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 20:34:30,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820612789] [2021-07-13 20:34:30,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:34:30,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:30,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:34:30,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:34:30,653 INFO L87 Difference]: Start difference. First operand 842 states and 2772 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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) [2021-07-13 20:34:30,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:30,872 INFO L93 Difference]: Finished difference Result 1605 states and 4891 transitions. [2021-07-13 20:34:30,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:34:30,872 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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 [2021-07-13 20:34:30,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:30,876 INFO L225 Difference]: With dead ends: 1605 [2021-07-13 20:34:30,876 INFO L226 Difference]: Without dead ends: 1605 [2021-07-13 20:34:30,876 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 126.0ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:34:30,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-07-13 20:34:30,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 896. [2021-07-13 20:34:30,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.2905027932960893) internal successors, (2945), 895 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:30,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2945 transitions. [2021-07-13 20:34:30,895 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2945 transitions. Word has length 24 [2021-07-13 20:34:30,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:30,895 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2945 transitions. [2021-07-13 20:34:30,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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) [2021-07-13 20:34:30,895 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2945 transitions. [2021-07-13 20:34:30,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:34:30,897 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:30,897 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:31,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:31,110 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:31,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:31,125 INFO L82 PathProgramCache]: Analyzing trace with hash 816762694, now seen corresponding path program 22 times [2021-07-13 20:34:31,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:31,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781989699] [2021-07-13 20:34:31,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:31,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:31,154 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:34:31,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:31,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781989699] [2021-07-13 20:34:31,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781989699] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:31,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271716196] [2021-07-13 20:34:31,155 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 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 [2021-07-13 20:34:31,178 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:34:31,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:31,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:34:31,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:31,217 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:34:31,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271716196] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:31,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:31,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 20:34:31,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428672256] [2021-07-13 20:34:31,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:34:31,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:31,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:34:31,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:34:31,219 INFO L87 Difference]: Start difference. First operand 896 states and 2945 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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) [2021-07-13 20:34:31,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:31,421 INFO L93 Difference]: Finished difference Result 1524 states and 4690 transitions. [2021-07-13 20:34:31,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:34:31,422 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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 [2021-07-13 20:34:31,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:31,425 INFO L225 Difference]: With dead ends: 1524 [2021-07-13 20:34:31,425 INFO L226 Difference]: Without dead ends: 1520 [2021-07-13 20:34:31,426 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 109.1ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:34:31,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-07-13 20:34:31,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 896. [2021-07-13 20:34:31,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.288268156424581) internal successors, (2943), 895 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:31,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2943 transitions. [2021-07-13 20:34:31,444 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2943 transitions. Word has length 24 [2021-07-13 20:34:31,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:31,444 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2943 transitions. [2021-07-13 20:34:31,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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) [2021-07-13 20:34:31,444 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2943 transitions. [2021-07-13 20:34:31,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:34:31,446 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:31,446 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:31,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-07-13 20:34:31,653 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:31,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:31,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1414099352, now seen corresponding path program 23 times [2021-07-13 20:34:31,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:31,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750865151] [2021-07-13 20:34:31,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:31,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:31,685 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:31,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:31,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750865151] [2021-07-13 20:34:31,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750865151] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:31,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023903078] [2021-07-13 20:34:31,685 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 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 [2021-07-13 20:34:31,715 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:34:31,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:31,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:34:31,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:31,755 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:31,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023903078] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:31,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:31,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-13 20:34:31,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412500705] [2021-07-13 20:34:31,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:34:31,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:31,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:34:31,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:34:31,756 INFO L87 Difference]: Start difference. First operand 896 states and 2943 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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) [2021-07-13 20:34:31,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:31,961 INFO L93 Difference]: Finished difference Result 1508 states and 4652 transitions. [2021-07-13 20:34:31,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:34:31,961 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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 [2021-07-13 20:34:31,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:31,964 INFO L225 Difference]: With dead ends: 1508 [2021-07-13 20:34:31,964 INFO L226 Difference]: Without dead ends: 1496 [2021-07-13 20:34:31,965 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 114.7ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:34:31,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-07-13 20:34:31,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 904. [2021-07-13 20:34:31,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 3.276854928017719) internal successors, (2959), 903 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:31,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2959 transitions. [2021-07-13 20:34:31,983 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2959 transitions. Word has length 24 [2021-07-13 20:34:31,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:31,983 INFO L482 AbstractCegarLoop]: Abstraction has 904 states and 2959 transitions. [2021-07-13 20:34:31,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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) [2021-07-13 20:34:31,983 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2959 transitions. [2021-07-13 20:34:31,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:34:31,985 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:31,985 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:32,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:32,202 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:32,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:32,202 INFO L82 PathProgramCache]: Analyzing trace with hash 887679068, now seen corresponding path program 24 times [2021-07-13 20:34:32,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:32,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277343732] [2021-07-13 20:34:32,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:32,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:32,234 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:32,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:32,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277343732] [2021-07-13 20:34:32,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277343732] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:32,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527893885] [2021-07-13 20:34:32,234 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 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 [2021-07-13 20:34:32,260 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:34:32,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:32,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:34:32,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:32,331 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:32,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527893885] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:32,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:32,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:34:32,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618389242] [2021-07-13 20:34:32,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:34:32,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:32,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:34:32,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:34:32,333 INFO L87 Difference]: Start difference. First operand 904 states and 2959 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-07-13 20:34:32,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:32,816 INFO L93 Difference]: Finished difference Result 2412 states and 7565 transitions. [2021-07-13 20:34:32,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:34:32,816 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 [2021-07-13 20:34:32,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:32,820 INFO L225 Difference]: With dead ends: 2412 [2021-07-13 20:34:32,820 INFO L226 Difference]: Without dead ends: 2412 [2021-07-13 20:34:32,821 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 312.2ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:34:32,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-07-13 20:34:32,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 960. [2021-07-13 20:34:32,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 3.367049009384776) internal successors, (3229), 959 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:32,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3229 transitions. [2021-07-13 20:34:32,844 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3229 transitions. Word has length 24 [2021-07-13 20:34:32,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:32,844 INFO L482 AbstractCegarLoop]: Abstraction has 960 states and 3229 transitions. [2021-07-13 20:34:32,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-07-13 20:34:32,844 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3229 transitions. [2021-07-13 20:34:32,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:34:32,846 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:32,846 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:33,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-07-13 20:34:33,061 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:33,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:33,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1454631148, now seen corresponding path program 25 times [2021-07-13 20:34:33,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:33,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141482092] [2021-07-13 20:34:33,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:33,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:33,102 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:33,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:33,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141482092] [2021-07-13 20:34:33,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141482092] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:33,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878574482] [2021-07-13 20:34:33,102 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 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 [2021-07-13 20:34:33,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:33,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:34:33,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:33,218 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:33,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878574482] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:33,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:33,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:34:33,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180892561] [2021-07-13 20:34:33,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:34:33,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:33,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:34:33,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:34:33,219 INFO L87 Difference]: Start difference. First operand 960 states and 3229 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-07-13 20:34:33,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:33,655 INFO L93 Difference]: Finished difference Result 2335 states and 7372 transitions. [2021-07-13 20:34:33,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:34:33,656 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 [2021-07-13 20:34:33,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:33,660 INFO L225 Difference]: With dead ends: 2335 [2021-07-13 20:34:33,660 INFO L226 Difference]: Without dead ends: 2335 [2021-07-13 20:34:33,661 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 313.9ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:34:33,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-07-13 20:34:33,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 957. [2021-07-13 20:34:33,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:33,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-07-13 20:34:33,685 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-07-13 20:34:33,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:33,685 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-07-13 20:34:33,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-07-13 20:34:33,686 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-07-13 20:34:33,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:34:33,687 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:33,687 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:33,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:33,901 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:33,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:33,901 INFO L82 PathProgramCache]: Analyzing trace with hash 282285290, now seen corresponding path program 26 times [2021-07-13 20:34:33,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:33,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583609294] [2021-07-13 20:34:33,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:33,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:33,939 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:33,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:33,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583609294] [2021-07-13 20:34:33,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583609294] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:33,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556650315] [2021-07-13 20:34:33,940 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 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 [2021-07-13 20:34:33,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:34:33,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:33,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:34:33,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:34,046 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:34,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556650315] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:34,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:34,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:34:34,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478327224] [2021-07-13 20:34:34,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:34:34,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:34,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:34:34,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:34:34,047 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-07-13 20:34:34,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:34,440 INFO L93 Difference]: Finished difference Result 2285 states and 7121 transitions. [2021-07-13 20:34:34,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:34:34,441 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 [2021-07-13 20:34:34,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:34,445 INFO L225 Difference]: With dead ends: 2285 [2021-07-13 20:34:34,445 INFO L226 Difference]: Without dead ends: 2285 [2021-07-13 20:34:34,445 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 243.6ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:34:34,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-07-13 20:34:34,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 963. [2021-07-13 20:34:34,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:34,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-07-13 20:34:34,471 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-07-13 20:34:34,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:34,471 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-07-13 20:34:34,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-07-13 20:34:34,472 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-07-13 20:34:34,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:34:34,473 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:34,474 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:34,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-07-13 20:34:34,678 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:34,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:34,678 INFO L82 PathProgramCache]: Analyzing trace with hash 363661378, now seen corresponding path program 27 times [2021-07-13 20:34:34,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:34,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23621175] [2021-07-13 20:34:34,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:34,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:34,712 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:34,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:34,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23621175] [2021-07-13 20:34:34,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23621175] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:34,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097016950] [2021-07-13 20:34:34,712 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 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 [2021-07-13 20:34:34,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:34:34,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:34,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:34:34,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:34,797 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:34,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097016950] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:34,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:34,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:34:34,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426244988] [2021-07-13 20:34:34,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:34:34,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:34,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:34:34,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:34:34,798 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-07-13 20:34:35,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:35,148 INFO L93 Difference]: Finished difference Result 2176 states and 6849 transitions. [2021-07-13 20:34:35,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:34:35,149 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 [2021-07-13 20:34:35,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:35,153 INFO L225 Difference]: With dead ends: 2176 [2021-07-13 20:34:35,153 INFO L226 Difference]: Without dead ends: 2172 [2021-07-13 20:34:35,154 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 208.5ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:34:35,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-07-13 20:34:35,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 957. [2021-07-13 20:34:35,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:35,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-07-13 20:34:35,194 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-07-13 20:34:35,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:35,194 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-07-13 20:34:35,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-07-13 20:34:35,194 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-07-13 20:34:35,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:34:35,196 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:35,196 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:35,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:35,413 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:35,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:35,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1294318594, now seen corresponding path program 28 times [2021-07-13 20:34:35,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:35,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902552587] [2021-07-13 20:34:35,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:35,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:35,442 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:35,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:35,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902552587] [2021-07-13 20:34:35,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902552587] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:35,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492386810] [2021-07-13 20:34:35,442 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 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 [2021-07-13 20:34:35,466 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:34:35,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:35,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:34:35,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:35,533 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:35,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492386810] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:35,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:35,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:34:35,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657899614] [2021-07-13 20:34:35,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:34:35,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:35,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:34:35,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:34:35,535 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-07-13 20:34:35,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:35,882 INFO L93 Difference]: Finished difference Result 2199 states and 6893 transitions. [2021-07-13 20:34:35,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:34:35,883 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 [2021-07-13 20:34:35,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:35,887 INFO L225 Difference]: With dead ends: 2199 [2021-07-13 20:34:35,887 INFO L226 Difference]: Without dead ends: 2199 [2021-07-13 20:34:35,888 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 232.9ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:34:35,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-07-13 20:34:35,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 963. [2021-07-13 20:34:35,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:35,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-07-13 20:34:35,912 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-07-13 20:34:35,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:35,912 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-07-13 20:34:35,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-07-13 20:34:35,913 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-07-13 20:34:35,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:34:35,914 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:35,914 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:36,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-07-13 20:34:36,131 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:36,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:36,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1357609548, now seen corresponding path program 29 times [2021-07-13 20:34:36,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:36,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119053909] [2021-07-13 20:34:36,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:36,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:36,160 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:36,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:36,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119053909] [2021-07-13 20:34:36,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119053909] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:36,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260886522] [2021-07-13 20:34:36,161 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 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 [2021-07-13 20:34:36,185 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:34:36,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:36,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:34:36,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:36,247 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:36,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260886522] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:36,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:36,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:34:36,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927840302] [2021-07-13 20:34:36,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:34:36,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:36,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:34:36,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:34:36,249 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-07-13 20:34:36,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:36,581 INFO L93 Difference]: Finished difference Result 2156 states and 6791 transitions. [2021-07-13 20:34:36,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:34:36,581 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 [2021-07-13 20:34:36,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:36,585 INFO L225 Difference]: With dead ends: 2156 [2021-07-13 20:34:36,585 INFO L226 Difference]: Without dead ends: 2152 [2021-07-13 20:34:36,586 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 216.0ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:34:36,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-07-13 20:34:36,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 957. [2021-07-13 20:34:36,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:36,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-07-13 20:34:36,608 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-07-13 20:34:36,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:36,608 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-07-13 20:34:36,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-07-13 20:34:36,608 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-07-13 20:34:36,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:34:36,609 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:36,609 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:36,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-07-13 20:34:36,826 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:36,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:36,827 INFO L82 PathProgramCache]: Analyzing trace with hash -354181564, now seen corresponding path program 30 times [2021-07-13 20:34:36,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:36,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730732248] [2021-07-13 20:34:36,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:36,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:36,856 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:36,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:36,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730732248] [2021-07-13 20:34:36,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730732248] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:36,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140781337] [2021-07-13 20:34:36,857 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 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 [2021-07-13 20:34:36,880 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:34:36,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:36,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:34:36,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:36,932 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:36,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140781337] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:36,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:36,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:34:36,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178710834] [2021-07-13 20:34:36,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:34:36,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:36,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:34:36,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:34:36,933 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-07-13 20:34:37,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:37,265 INFO L93 Difference]: Finished difference Result 2097 states and 6377 transitions. [2021-07-13 20:34:37,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:34:37,265 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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 [2021-07-13 20:34:37,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:37,269 INFO L225 Difference]: With dead ends: 2097 [2021-07-13 20:34:37,269 INFO L226 Difference]: Without dead ends: 2097 [2021-07-13 20:34:37,269 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 184.0ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:34:37,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-07-13 20:34:37,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1047. [2021-07-13 20:34:37,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.378585086042065) internal successors, (3534), 1046 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:37,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3534 transitions. [2021-07-13 20:34:37,290 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3534 transitions. Word has length 24 [2021-07-13 20:34:37,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:37,290 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3534 transitions. [2021-07-13 20:34:37,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-07-13 20:34:37,290 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3534 transitions. [2021-07-13 20:34:37,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:34:37,291 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:37,292 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:37,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:37,507 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:37,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:37,529 INFO L82 PathProgramCache]: Analyzing trace with hash -272805476, now seen corresponding path program 31 times [2021-07-13 20:34:37,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:37,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820644753] [2021-07-13 20:34:37,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:37,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:37,568 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:37,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:37,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820644753] [2021-07-13 20:34:37,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820644753] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:37,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287891233] [2021-07-13 20:34:37,584 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 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 [2021-07-13 20:34:37,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:37,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:34:37,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:37,662 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:37,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287891233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:37,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:37,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:34:37,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895021199] [2021-07-13 20:34:37,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:34:37,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:37,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:34:37,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:34:37,664 INFO L87 Difference]: Start difference. First operand 1047 states and 3534 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-07-13 20:34:37,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:37,931 INFO L93 Difference]: Finished difference Result 1963 states and 6051 transitions. [2021-07-13 20:34:37,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:34:37,932 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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 [2021-07-13 20:34:37,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:37,936 INFO L225 Difference]: With dead ends: 1963 [2021-07-13 20:34:37,936 INFO L226 Difference]: Without dead ends: 1959 [2021-07-13 20:34:37,936 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 156.2ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:34:37,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-07-13 20:34:37,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1047. [2021-07-13 20:34:37,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.376673040152964) internal successors, (3532), 1046 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:37,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3532 transitions. [2021-07-13 20:34:37,959 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3532 transitions. Word has length 24 [2021-07-13 20:34:37,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:37,960 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3532 transitions. [2021-07-13 20:34:37,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-07-13 20:34:37,960 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3532 transitions. [2021-07-13 20:34:37,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:34:37,962 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:37,962 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:38,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-07-13 20:34:38,179 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:38,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:38,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1787897448, now seen corresponding path program 32 times [2021-07-13 20:34:38,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:38,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548431839] [2021-07-13 20:34:38,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:38,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:38,210 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:38,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:38,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548431839] [2021-07-13 20:34:38,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548431839] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:38,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655692933] [2021-07-13 20:34:38,210 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 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 [2021-07-13 20:34:38,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:34:38,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:38,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:34:38,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:38,280 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:38,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655692933] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:38,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:38,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:34:38,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513051126] [2021-07-13 20:34:38,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:34:38,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:38,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:34:38,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:34:38,281 INFO L87 Difference]: Start difference. First operand 1047 states and 3532 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-07-13 20:34:38,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:38,475 INFO L93 Difference]: Finished difference Result 1728 states and 5494 transitions. [2021-07-13 20:34:38,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:34:38,475 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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 [2021-07-13 20:34:38,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:38,478 INFO L225 Difference]: With dead ends: 1728 [2021-07-13 20:34:38,479 INFO L226 Difference]: Without dead ends: 1716 [2021-07-13 20:34:38,479 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 111.8ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:34:38,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-07-13 20:34:38,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1047. [2021-07-13 20:34:38,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.372848948374761) internal successors, (3528), 1046 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:38,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3528 transitions. [2021-07-13 20:34:38,499 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3528 transitions. Word has length 24 [2021-07-13 20:34:38,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:38,499 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3528 transitions. [2021-07-13 20:34:38,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-07-13 20:34:38,499 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3528 transitions. [2021-07-13 20:34:38,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:34:38,501 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:38,501 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:38,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:38,718 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:38,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:38,719 INFO L82 PathProgramCache]: Analyzing trace with hash -190770732, now seen corresponding path program 33 times [2021-07-13 20:34:38,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:38,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495865964] [2021-07-13 20:34:38,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:38,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:38,751 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:38,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:38,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495865964] [2021-07-13 20:34:38,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495865964] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:38,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147463372] [2021-07-13 20:34:38,752 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 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 [2021-07-13 20:34:38,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:34:38,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:38,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:34:38,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:38,848 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:38,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147463372] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:38,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:38,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:34:38,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427233424] [2021-07-13 20:34:38,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:34:38,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:38,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:34:38,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:34:38,849 INFO L87 Difference]: Start difference. First operand 1047 states and 3528 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-07-13 20:34:39,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:39,123 INFO L93 Difference]: Finished difference Result 1821 states and 5719 transitions. [2021-07-13 20:34:39,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:34:39,123 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 [2021-07-13 20:34:39,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:39,127 INFO L225 Difference]: With dead ends: 1821 [2021-07-13 20:34:39,127 INFO L226 Difference]: Without dead ends: 1821 [2021-07-13 20:34:39,127 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 193.7ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:34:39,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-07-13 20:34:39,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1119. [2021-07-13 20:34:39,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.370304114490161) internal successors, (3768), 1118 states have internal predecessors, (3768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:39,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3768 transitions. [2021-07-13 20:34:39,150 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3768 transitions. Word has length 24 [2021-07-13 20:34:39,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:39,150 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3768 transitions. [2021-07-13 20:34:39,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-07-13 20:34:39,150 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3768 transitions. [2021-07-13 20:34:39,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:34:39,152 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:39,152 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:39,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-07-13 20:34:39,369 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:39,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:39,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1452268422, now seen corresponding path program 34 times [2021-07-13 20:34:39,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:39,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683600930] [2021-07-13 20:34:39,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:39,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:39,413 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:39,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:39,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683600930] [2021-07-13 20:34:39,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683600930] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:39,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024510173] [2021-07-13 20:34:39,414 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 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 [2021-07-13 20:34:39,438 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:34:39,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:39,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:34:39,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:39,499 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:39,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024510173] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:39,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:39,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:34:39,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891200327] [2021-07-13 20:34:39,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:34:39,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:39,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:34:39,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:34:39,500 INFO L87 Difference]: Start difference. First operand 1119 states and 3768 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-07-13 20:34:39,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:39,758 INFO L93 Difference]: Finished difference Result 1790 states and 5648 transitions. [2021-07-13 20:34:39,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:34:39,758 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 [2021-07-13 20:34:39,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:39,761 INFO L225 Difference]: With dead ends: 1790 [2021-07-13 20:34:39,761 INFO L226 Difference]: Without dead ends: 1786 [2021-07-13 20:34:39,762 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 168.4ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:34:39,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-07-13 20:34:39,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1119. [2021-07-13 20:34:39,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.368515205724508) internal successors, (3766), 1118 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:39,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3766 transitions. [2021-07-13 20:34:39,784 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3766 transitions. Word has length 24 [2021-07-13 20:34:39,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:39,784 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3766 transitions. [2021-07-13 20:34:39,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-07-13 20:34:39,784 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3766 transitions. [2021-07-13 20:34:39,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:34:39,786 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:39,786 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:40,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-07-13 20:34:40,003 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:40,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:40,004 INFO L82 PathProgramCache]: Analyzing trace with hash 184811244, now seen corresponding path program 35 times [2021-07-13 20:34:40,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:40,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095780538] [2021-07-13 20:34:40,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:40,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:40,035 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:40,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:40,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095780538] [2021-07-13 20:34:40,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095780538] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:40,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463264445] [2021-07-13 20:34:40,036 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 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 [2021-07-13 20:34:40,061 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:34:40,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:40,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:34:40,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:40,113 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:40,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463264445] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:40,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:40,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:34:40,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003062884] [2021-07-13 20:34:40,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:34:40,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:40,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:34:40,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:34:40,114 INFO L87 Difference]: Start difference. First operand 1119 states and 3766 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-07-13 20:34:40,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:40,267 INFO L93 Difference]: Finished difference Result 1649 states and 5332 transitions. [2021-07-13 20:34:40,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:34:40,268 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 [2021-07-13 20:34:40,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:40,271 INFO L225 Difference]: With dead ends: 1649 [2021-07-13 20:34:40,271 INFO L226 Difference]: Without dead ends: 1637 [2021-07-13 20:34:40,271 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 88.6ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:34:40,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-07-13 20:34:40,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1119. [2021-07-13 20:34:40,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.3649373881932023) internal successors, (3762), 1118 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) [2021-07-13 20:34:40,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3762 transitions. [2021-07-13 20:34:40,291 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3762 transitions. Word has length 24 [2021-07-13 20:34:40,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:40,291 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3762 transitions. [2021-07-13 20:34:40,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-07-13 20:34:40,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3762 transitions. [2021-07-13 20:34:40,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:34:40,293 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:40,293 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:40,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:40,510 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:40,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:40,511 INFO L82 PathProgramCache]: Analyzing trace with hash -998684486, now seen corresponding path program 4 times [2021-07-13 20:34:40,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:40,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110519383] [2021-07-13 20:34:40,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:40,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:40,743 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2021-07-13 20:34:41,132 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:41,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:41,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110519383] [2021-07-13 20:34:41,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110519383] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:41,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189609127] [2021-07-13 20:34:41,132 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 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 [2021-07-13 20:34:41,177 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:34:41,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:41,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:34:41,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:41,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:41,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:41,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:41,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:34:41,588 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:41,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:41,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:41,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:41,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:34:41,595 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:41,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:41,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:41,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:41,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-07-13 20:34:41,602 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:41,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:41,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:41,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:41,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:34:41,608 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:41,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:41,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:41,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:41,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:34:41,614 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:41,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:41,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:41,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:41,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:34:41,621 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:41,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:41,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:41,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:41,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:34:41,627 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:41,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:41,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:41,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:41,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:34:41,634 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:41,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:41,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:41,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:41,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:34:41,641 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:41,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:41,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:41,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:41,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-13 20:34:41,647 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:41,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:41,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:41,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:41,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:34:41,654 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:41,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:41,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:41,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:41,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:34:41,660 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:41,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:41,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:41,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:41,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-13 20:34:41,667 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:41,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:41,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:41,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:41,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:34:41,672 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:41,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:41,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:41,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:34:41,677 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:41,752 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-07-13 20:34:41,754 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:34:41,755 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-07-13 20:34:41,811 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:41,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189609127] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:41,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:41,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:34:41,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006002073] [2021-07-13 20:34:41,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:34:41,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:41,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:34:41,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:34:41,812 INFO L87 Difference]: Start difference. First operand 1119 states and 3762 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:42,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:42,609 INFO L93 Difference]: Finished difference Result 1531 states and 5001 transitions. [2021-07-13 20:34:42,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:34:42,610 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:34:42,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:42,613 INFO L225 Difference]: With dead ends: 1531 [2021-07-13 20:34:42,613 INFO L226 Difference]: Without dead ends: 1516 [2021-07-13 20:34:42,613 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1271.8ms TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:34:42,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1516 states. [2021-07-13 20:34:42,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1516 to 1141. [2021-07-13 20:34:42,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 1140 states have (on average 3.362280701754386) internal successors, (3833), 1140 states have internal predecessors, (3833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:42,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3833 transitions. [2021-07-13 20:34:42,629 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3833 transitions. Word has length 26 [2021-07-13 20:34:42,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:42,630 INFO L482 AbstractCegarLoop]: Abstraction has 1141 states and 3833 transitions. [2021-07-13 20:34:42,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:42,630 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3833 transitions. [2021-07-13 20:34:42,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:34:42,631 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:42,632 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:42,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-07-13 20:34:42,833 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:42,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:42,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1267884794, now seen corresponding path program 5 times [2021-07-13 20:34:42,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:42,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339458095] [2021-07-13 20:34:42,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:42,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:43,137 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 40 [2021-07-13 20:34:43,496 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:43,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:43,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339458095] [2021-07-13 20:34:43,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339458095] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:43,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037549445] [2021-07-13 20:34:43,496 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 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 [2021-07-13 20:34:43,523 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:34:43,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:43,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:34:43,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:43,998 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-07-13 20:34:44,042 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_3], 2=[A, v_prenex_5]} [2021-07-13 20:34:44,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:44,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:34:44,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:44,172 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-07-13 20:34:44,172 INFO L628 ElimStorePlain]: treesize reduction 54, result has 69.8 percent of original size [2021-07-13 20:34:44,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:44,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:44,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:44,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:34:44,179 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:44,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:44,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:44,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:34:44,185 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:44,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:44,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:44,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:44,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:34:44,235 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:44,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:44,280 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:34:44,280 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:193, output treesize:51 [2021-07-13 20:34:44,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:44,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037549445] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:44,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:44,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:34:44,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943496590] [2021-07-13 20:34:44,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:34:44,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:44,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:34:44,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:34:44,360 INFO L87 Difference]: Start difference. First operand 1141 states and 3833 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:45,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:45,234 INFO L93 Difference]: Finished difference Result 1509 states and 4945 transitions. [2021-07-13 20:34:45,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:34:45,234 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:34:45,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:45,237 INFO L225 Difference]: With dead ends: 1509 [2021-07-13 20:34:45,238 INFO L226 Difference]: Without dead ends: 1494 [2021-07-13 20:34:45,238 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1435.8ms TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:34:45,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2021-07-13 20:34:45,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 1150. [2021-07-13 20:34:45,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1149 states have (on average 3.3568320278503045) internal successors, (3857), 1149 states have internal predecessors, (3857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:45,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 3857 transitions. [2021-07-13 20:34:45,257 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 3857 transitions. Word has length 26 [2021-07-13 20:34:45,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:45,257 INFO L482 AbstractCegarLoop]: Abstraction has 1150 states and 3857 transitions. [2021-07-13 20:34:45,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:45,258 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 3857 transitions. [2021-07-13 20:34:45,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:34:45,260 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:45,260 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:45,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:45,477 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:45,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:45,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1435653194, now seen corresponding path program 36 times [2021-07-13 20:34:45,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:45,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983841376] [2021-07-13 20:34:45,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:45,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:45,984 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2021-07-13 20:34:46,135 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2021-07-13 20:34:46,271 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:46,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:46,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983841376] [2021-07-13 20:34:46,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983841376] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:46,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986775702] [2021-07-13 20:34:46,271 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 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 [2021-07-13 20:34:46,298 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:34:46,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:46,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:34:46,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:46,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:46,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:46,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:46,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:46,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:46,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:46,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:34:46,830 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:46,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:46,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:46,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:46,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:46,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:46,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:46,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-13 20:34:46,839 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:46,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:46,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:46,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:46,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:46,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:46,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:46,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:34:46,850 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:46,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:46,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:46,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:46,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:46,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:46,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:46,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:34:46,860 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:46,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:46,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:46,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:46,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:46,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:46,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:46,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-07-13 20:34:46,871 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:46,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:46,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:46,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:46,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:46,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:46,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:46,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-13 20:34:46,879 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:46,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:46,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:46,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:46,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:46,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:46,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:46,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-13 20:34:46,888 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:46,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:46,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:46,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:46,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:46,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:46,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:46,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-13 20:34:46,897 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:46,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:46,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:46,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:46,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:46,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:46,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:46,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-07-13 20:34:46,906 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:46,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:46,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:46,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:46,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:46,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:46,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:46,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-13 20:34:46,915 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:46,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:46,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:46,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:46,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:46,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:46,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:46,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-13 20:34:46,924 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:46,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:46,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:46,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:46,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:46,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:46,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:46,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-13 20:34:46,933 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:46,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:46,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:46,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:46,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:46,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:46,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:46,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:34:46,941 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:46,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:46,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:46,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:46,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:46,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:46,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:46,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-07-13 20:34:46,950 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:46,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:46,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:46,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:46,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:46,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-07-13 20:34:46,956 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:46,979 INFO L628 ElimStorePlain]: treesize reduction 16, result has 62.8 percent of original size [2021-07-13 20:34:46,980 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:34:46,980 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-07-13 20:34:47,011 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:47,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986775702] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:47,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:47,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-07-13 20:34:47,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864326793] [2021-07-13 20:34:47,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:34:47,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:47,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:34:47,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:34:47,012 INFO L87 Difference]: Start difference. First operand 1150 states and 3857 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:48,312 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 48 [2021-07-13 20:34:48,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:48,708 INFO L93 Difference]: Finished difference Result 1607 states and 5192 transitions. [2021-07-13 20:34:48,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:34:48,709 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:34:48,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:48,712 INFO L225 Difference]: With dead ends: 1607 [2021-07-13 20:34:48,712 INFO L226 Difference]: Without dead ends: 1592 [2021-07-13 20:34:48,712 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 2117.1ms TimeCoverageRelationStatistics Valid=247, Invalid=1159, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:34:48,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2021-07-13 20:34:48,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 1180. [2021-07-13 20:34:48,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 3.340966921119593) internal successors, (3939), 1179 states have internal predecessors, (3939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:48,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3939 transitions. [2021-07-13 20:34:48,733 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3939 transitions. Word has length 26 [2021-07-13 20:34:48,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:48,733 INFO L482 AbstractCegarLoop]: Abstraction has 1180 states and 3939 transitions. [2021-07-13 20:34:48,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:48,733 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3939 transitions. [2021-07-13 20:34:48,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:34:48,735 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:48,735 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:48,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-07-13 20:34:48,952 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:48,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:48,952 INFO L82 PathProgramCache]: Analyzing trace with hash -630606018, now seen corresponding path program 6 times [2021-07-13 20:34:48,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:48,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549898410] [2021-07-13 20:34:48,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:48,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:49,368 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2021-07-13 20:34:49,590 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2021-07-13 20:34:49,793 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:49,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:49,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549898410] [2021-07-13 20:34:49,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549898410] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:49,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130936865] [2021-07-13 20:34:49,793 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 [2021-07-13 20:34:49,819 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:34:49,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:49,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:34:49,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:50,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:50,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:50,108 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:50,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-07-13 20:34:50,110 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:50,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:50,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:50,119 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:34:50,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-07-13 20:34:50,120 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:50,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:50,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:50,131 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:50,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 28 [2021-07-13 20:34:50,135 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:50,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:50,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:50,147 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:34:50,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 23 [2021-07-13 20:34:50,149 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:50,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:50,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:50,160 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:34:50,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 23 [2021-07-13 20:34:50,162 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:50,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:50,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:50,172 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:34:50,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 25 [2021-07-13 20:34:50,173 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:50,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:50,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:50,183 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:34:50,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 27 [2021-07-13 20:34:50,184 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:50,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:50,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:50,196 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:34:50,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 30 [2021-07-13 20:34:50,197 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:50,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:50,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:50,206 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:34:50,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 24 [2021-07-13 20:34:50,207 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:50,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:50,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:50,218 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:34:50,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 27 [2021-07-13 20:34:50,219 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:50,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:50,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:50,229 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:34:50,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 25 [2021-07-13 20:34:50,230 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:50,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:50,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:50,243 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:50,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 30 [2021-07-13 20:34:50,244 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:50,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:50,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:50,255 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:50,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2021-07-13 20:34:50,260 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:50,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:50,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:50,272 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:34:50,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 24 [2021-07-13 20:34:50,274 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:50,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:50,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:50,285 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:50,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 31 [2021-07-13 20:34:50,288 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:50,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:50,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:50,295 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:34:50,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 22 [2021-07-13 20:34:50,296 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:50,369 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:50,371 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:34:50,371 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:865, output treesize:221 [2021-07-13 20:34:50,600 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:50,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130936865] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:50,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:50,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-13 20:34:50,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927115850] [2021-07-13 20:34:50,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:34:50,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:50,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:34:50,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:34:50,601 INFO L87 Difference]: Start difference. First operand 1180 states and 3939 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:51,564 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 48 [2021-07-13 20:34:51,686 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-07-13 20:34:51,995 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-07-13 20:34:52,163 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2021-07-13 20:34:52,442 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 62 [2021-07-13 20:34:52,608 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2021-07-13 20:34:52,870 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 64 [2021-07-13 20:34:53,043 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2021-07-13 20:34:53,650 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2021-07-13 20:34:53,949 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 41 [2021-07-13 20:34:54,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:54,087 INFO L93 Difference]: Finished difference Result 1843 states and 5867 transitions. [2021-07-13 20:34:54,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:34:54,087 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:34:54,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:54,091 INFO L225 Difference]: With dead ends: 1843 [2021-07-13 20:34:54,091 INFO L226 Difference]: Without dead ends: 1828 [2021-07-13 20:34:54,091 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 3609.9ms TimeCoverageRelationStatistics Valid=290, Invalid=1602, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:34:54,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2021-07-13 20:34:54,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1198. [2021-07-13 20:34:54,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 3.346700083542189) internal successors, (4006), 1197 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) [2021-07-13 20:34:54,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 4006 transitions. [2021-07-13 20:34:54,110 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 4006 transitions. Word has length 26 [2021-07-13 20:34:54,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:54,110 INFO L482 AbstractCegarLoop]: Abstraction has 1198 states and 4006 transitions. [2021-07-13 20:34:54,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:54,111 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 4006 transitions. [2021-07-13 20:34:54,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:34:54,112 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:54,112 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:54,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:54,328 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:54,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:54,329 INFO L82 PathProgramCache]: Analyzing trace with hash 919775546, now seen corresponding path program 37 times [2021-07-13 20:34:54,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:54,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059286720] [2021-07-13 20:34:54,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:54,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:54,739 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2021-07-13 20:34:54,880 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:54,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:54,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059286720] [2021-07-13 20:34:54,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059286720] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:54,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541830574] [2021-07-13 20:34:54,881 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 [2021-07-13 20:34:54,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:54,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:34:54,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:55,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:55,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:55,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:55,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:55,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:55,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:55,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-07-13 20:34:55,468 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:55,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:55,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:55,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:55,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:55,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:55,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:55,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:34:55,477 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:55,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:55,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:55,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:55,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:55,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:55,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:55,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-13 20:34:55,484 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:55,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:55,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:55,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:55,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:55,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:55,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:55,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-13 20:34:55,493 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:55,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:55,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:55,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:55,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:55,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:55,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:55,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-07-13 20:34:55,501 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:55,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:55,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:55,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:55,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:55,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:55,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:55,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-07-13 20:34:55,509 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:55,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:55,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:55,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:55,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:55,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:55,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:55,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-13 20:34:55,518 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:55,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:55,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:55,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:55,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:55,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:55,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:55,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:34:55,526 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:55,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:55,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:55,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:55,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:55,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:55,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:55,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-13 20:34:55,533 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:55,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:55,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:55,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:55,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:55,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:55,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:55,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-13 20:34:55,544 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:55,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:55,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:55,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:55,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:55,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:55,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:55,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:34:55,552 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:55,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:55,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:55,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:55,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:55,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:55,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:55,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-13 20:34:55,558 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:55,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:55,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:55,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:55,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:55,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:55,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:55,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-07-13 20:34:55,564 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:55,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:55,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:55,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:55,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:55,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:55,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:55,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-13 20:34:55,570 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:55,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:55,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:55,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:55,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:55,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:34:55,575 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:55,591 INFO L628 ElimStorePlain]: treesize reduction 16, result has 62.8 percent of original size [2021-07-13 20:34:55,593 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:34:55,594 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-07-13 20:34:55,617 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:55,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541830574] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:55,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:55,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-07-13 20:34:55,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408257475] [2021-07-13 20:34:55,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:34:55,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:55,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:34:55,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:34:55,618 INFO L87 Difference]: Start difference. First operand 1198 states and 4006 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:56,771 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 50 [2021-07-13 20:34:56,910 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 55 [2021-07-13 20:34:57,031 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 55 [2021-07-13 20:34:57,513 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 57 [2021-07-13 20:34:57,837 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-07-13 20:34:57,985 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 54 [2021-07-13 20:34:58,490 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-07-13 20:34:58,680 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2021-07-13 20:34:58,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:58,812 INFO L93 Difference]: Finished difference Result 1877 states and 5988 transitions. [2021-07-13 20:34:58,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:34:58,812 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:34:58,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:58,816 INFO L225 Difference]: With dead ends: 1877 [2021-07-13 20:34:58,816 INFO L226 Difference]: Without dead ends: 1862 [2021-07-13 20:34:58,817 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 3248.0ms TimeCoverageRelationStatistics Valid=480, Invalid=2276, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 20:34:58,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1862 states. [2021-07-13 20:34:58,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1862 to 1206. [2021-07-13 20:34:58,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1206 states, 1205 states have (on average 3.349377593360996) internal successors, (4036), 1205 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) [2021-07-13 20:34:58,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 4036 transitions. [2021-07-13 20:34:58,838 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 4036 transitions. Word has length 26 [2021-07-13 20:34:58,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:58,838 INFO L482 AbstractCegarLoop]: Abstraction has 1206 states and 4036 transitions. [2021-07-13 20:34:58,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:58,838 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 4036 transitions. [2021-07-13 20:34:58,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:34:58,840 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:58,840 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:59,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:59,049 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:59,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:59,049 INFO L82 PathProgramCache]: Analyzing trace with hash -56543298, now seen corresponding path program 38 times [2021-07-13 20:34:59,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:59,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765128509] [2021-07-13 20:34:59,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:59,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:59,672 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:59,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:59,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765128509] [2021-07-13 20:34:59,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765128509] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:59,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661930889] [2021-07-13 20:34:59,673 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 [2021-07-13 20:34:59,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:34:59,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:59,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:34:59,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:00,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:00,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:00,284 INFO L354 Elim1Store]: treesize reduction 16, result has 40.7 percent of original size [2021-07-13 20:35:00,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 29 [2021-07-13 20:35:00,286 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:00,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:00,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:00,315 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-07-13 20:35:00,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 30 [2021-07-13 20:35:00,320 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:00,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:00,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:00,350 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-07-13 20:35:00,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 31 [2021-07-13 20:35:00,360 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:00,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:00,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:00,389 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-07-13 20:35:00,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 28 [2021-07-13 20:35:00,394 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:00,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:00,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:00,429 INFO L354 Elim1Store]: treesize reduction 9, result has 66.7 percent of original size [2021-07-13 20:35:00,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 36 [2021-07-13 20:35:00,435 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:00,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:00,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:00,453 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:35:00,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 20:35:00,454 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:00,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:00,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:00,472 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:35:00,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-07-13 20:35:00,473 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:00,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:00,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:00,514 INFO L354 Elim1Store]: treesize reduction 24, result has 11.1 percent of original size [2021-07-13 20:35:00,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 22 [2021-07-13 20:35:00,516 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:00,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:00,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:00,534 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:35:00,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-07-13 20:35:00,535 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:00,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:00,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:00,552 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:35:00,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-07-13 20:35:00,553 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:00,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:00,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:00,570 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:35:00,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-07-13 20:35:00,571 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:00,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:00,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:00,596 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-07-13 20:35:00,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 28 [2021-07-13 20:35:00,598 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:00,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:00,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:00,621 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:00,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 39 [2021-07-13 20:35:00,629 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:00,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:00,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:00,646 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:35:00,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-07-13 20:35:00,647 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:00,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:00,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:00,662 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:35:00,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-07-13 20:35:00,663 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:00,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:00,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:00,673 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:35:00,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-07-13 20:35:00,673 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:00,811 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2021-07-13 20:35:00,811 INFO L628 ElimStorePlain]: treesize reduction 94, result has 58.6 percent of original size [2021-07-13 20:35:00,813 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:35:00,814 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:841, output treesize:148 [2021-07-13 20:35:00,977 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:00,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661930889] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:00,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:00,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-07-13 20:35:00,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504953238] [2021-07-13 20:35:00,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:35:00,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:00,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:35:00,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:35:00,978 INFO L87 Difference]: Start difference. First operand 1206 states and 4036 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:02,459 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-07-13 20:35:02,596 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2021-07-13 20:35:02,826 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 49 [2021-07-13 20:35:02,962 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 45 [2021-07-13 20:35:03,314 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 57 [2021-07-13 20:35:03,867 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 58 [2021-07-13 20:35:04,018 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-07-13 20:35:04,163 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-07-13 20:35:04,540 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2021-07-13 20:35:04,855 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 64 [2021-07-13 20:35:05,073 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 40 [2021-07-13 20:35:05,320 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2021-07-13 20:35:05,610 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2021-07-13 20:35:05,733 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 45 [2021-07-13 20:35:05,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:05,865 INFO L93 Difference]: Finished difference Result 2051 states and 6324 transitions. [2021-07-13 20:35:05,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:35:05,866 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:35:05,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:05,869 INFO L225 Difference]: With dead ends: 2051 [2021-07-13 20:35:05,869 INFO L226 Difference]: Without dead ends: 2006 [2021-07-13 20:35:05,870 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1049 ImplicationChecksByTransitivity, 5021.1ms TimeCoverageRelationStatistics Valid=531, Invalid=3129, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:35:05,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2006 states. [2021-07-13 20:35:05,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2006 to 1381. [2021-07-13 20:35:05,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1381 states, 1380 states have (on average 3.318840579710145) internal successors, (4580), 1380 states have internal predecessors, (4580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:05,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1381 states to 1381 states and 4580 transitions. [2021-07-13 20:35:05,891 INFO L78 Accepts]: Start accepts. Automaton has 1381 states and 4580 transitions. Word has length 26 [2021-07-13 20:35:05,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:05,891 INFO L482 AbstractCegarLoop]: Abstraction has 1381 states and 4580 transitions. [2021-07-13 20:35:05,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:05,891 INFO L276 IsEmpty]: Start isEmpty. Operand 1381 states and 4580 transitions. [2021-07-13 20:35:05,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:35:05,893 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:05,893 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:35:06,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2021-07-13 20:35:06,109 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:06,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:06,109 INFO L82 PathProgramCache]: Analyzing trace with hash -2141610526, now seen corresponding path program 7 times [2021-07-13 20:35:06,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:06,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142186626] [2021-07-13 20:35:06,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:06,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:06,549 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-07-13 20:35:06,685 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2021-07-13 20:35:06,777 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:06,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:06,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142186626] [2021-07-13 20:35:06,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142186626] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:06,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148005915] [2021-07-13 20:35:06,777 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 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 [2021-07-13 20:35:06,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:06,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:35:06,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:07,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:07,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:07,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:07,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:35:07,180 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:07,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:07,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:07,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:07,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:35:07,186 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:07,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:07,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:07,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:07,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:35:07,192 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:07,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:07,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:07,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:07,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:35:07,199 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:07,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:07,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:07,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:07,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-13 20:35:07,206 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:07,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:07,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:07,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:07,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:35:07,212 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:07,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:07,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:07,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:07,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:35:07,218 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:07,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:07,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:07,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:07,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:35:07,225 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:07,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:07,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:07,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:07,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:35:07,231 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:07,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:07,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:07,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:07,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-13 20:35:07,236 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:07,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:07,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:07,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:07,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:35:07,243 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:07,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:07,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:07,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:07,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-07-13 20:35:07,249 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:07,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:07,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:07,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:07,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:35:07,257 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:07,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:07,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:07,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:07,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:35:07,263 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:07,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:07,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:07,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:35:07,267 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:07,343 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-07-13 20:35:07,345 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:35:07,345 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-07-13 20:35:07,403 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:07,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148005915] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:07,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:07,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-13 20:35:07,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099525391] [2021-07-13 20:35:07,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:35:07,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:07,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:35:07,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:35:07,404 INFO L87 Difference]: Start difference. First operand 1381 states and 4580 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:07,980 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2021-07-13 20:35:08,260 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 52 [2021-07-13 20:35:09,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:09,469 INFO L93 Difference]: Finished difference Result 1960 states and 6315 transitions. [2021-07-13 20:35:09,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:35:09,470 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:35:09,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:09,473 INFO L225 Difference]: With dead ends: 1960 [2021-07-13 20:35:09,473 INFO L226 Difference]: Without dead ends: 1945 [2021-07-13 20:35:09,474 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 2329.1ms TimeCoverageRelationStatistics Valid=236, Invalid=1170, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:35:09,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1945 states. [2021-07-13 20:35:09,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1945 to 1425. [2021-07-13 20:35:09,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1425 states, 1424 states have (on average 3.3202247191011236) internal successors, (4728), 1424 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) [2021-07-13 20:35:09,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1425 states to 1425 states and 4728 transitions. [2021-07-13 20:35:09,511 INFO L78 Accepts]: Start accepts. Automaton has 1425 states and 4728 transitions. Word has length 26 [2021-07-13 20:35:09,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:09,514 INFO L482 AbstractCegarLoop]: Abstraction has 1425 states and 4728 transitions. [2021-07-13 20:35:09,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:09,514 INFO L276 IsEmpty]: Start isEmpty. Operand 1425 states and 4728 transitions. [2021-07-13 20:35:09,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:35:09,516 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:09,516 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:35:09,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable419,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:35:09,730 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:09,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:09,731 INFO L82 PathProgramCache]: Analyzing trace with hash 124958754, now seen corresponding path program 8 times [2021-07-13 20:35:09,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:09,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2648604] [2021-07-13 20:35:09,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:09,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:10,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:10,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:10,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2648604] [2021-07-13 20:35:10,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2648604] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:10,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889847499] [2021-07-13 20:35:10,307 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 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 [2021-07-13 20:35:10,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:35:10,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:10,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:35:10,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:10,681 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-07-13 20:35:10,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:10,751 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:10,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 41 [2021-07-13 20:35:10,752 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:10,898 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2021-07-13 20:35:10,898 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:10,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:10,923 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-13 20:35:10,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 33 [2021-07-13 20:35:10,927 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:11,069 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-07-13 20:35:11,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:11,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:11,094 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-13 20:35:11,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 36 [2021-07-13 20:35:11,095 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:11,239 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2021-07-13 20:35:11,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:11,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:11,263 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-13 20:35:11,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 34 [2021-07-13 20:35:11,267 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:11,401 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-07-13 20:35:11,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:11,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:11,420 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:11,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 34 [2021-07-13 20:35:11,425 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:11,555 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-07-13 20:35:11,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:11,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:11,573 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:11,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 41 [2021-07-13 20:35:11,576 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:11,706 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-07-13 20:35:11,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:11,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:11,727 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-07-13 20:35:11,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 30 [2021-07-13 20:35:11,729 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:11,864 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-07-13 20:35:11,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:11,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:11,884 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-07-13 20:35:11,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 29 [2021-07-13 20:35:11,886 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:12,012 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-07-13 20:35:12,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:12,045 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:35:12,045 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:445, output treesize:479 [2021-07-13 20:35:12,320 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2021-07-13 20:35:12,529 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2021-07-13 20:35:12,636 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:12,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889847499] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:12,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:12,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:35:12,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042539799] [2021-07-13 20:35:12,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:35:12,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:12,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:35:12,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:35:12,637 INFO L87 Difference]: Start difference. First operand 1425 states and 4728 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:13,760 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 55 [2021-07-13 20:35:14,090 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 60 [2021-07-13 20:35:14,390 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 56 [2021-07-13 20:35:14,662 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 58 [2021-07-13 20:35:14,960 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-07-13 20:35:15,363 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2021-07-13 20:35:15,709 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 49 [2021-07-13 20:35:16,131 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 43 [2021-07-13 20:35:16,445 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 73 [2021-07-13 20:35:16,919 WARN L205 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 60 [2021-07-13 20:35:17,261 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 44 [2021-07-13 20:35:17,855 WARN L205 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 77 [2021-07-13 20:35:17,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:17,937 INFO L93 Difference]: Finished difference Result 2026 states and 6474 transitions. [2021-07-13 20:35:17,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:35:17,938 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:35:17,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:17,941 INFO L225 Difference]: With dead ends: 2026 [2021-07-13 20:35:17,941 INFO L226 Difference]: Without dead ends: 2011 [2021-07-13 20:35:17,943 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 5759.4ms TimeCoverageRelationStatistics Valid=321, Invalid=1749, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:35:17,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2011 states. [2021-07-13 20:35:17,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2011 to 1444. [2021-07-13 20:35:17,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1444 states, 1443 states have (on average 3.324324324324324) internal successors, (4797), 1443 states have internal predecessors, (4797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:17,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1444 states to 1444 states and 4797 transitions. [2021-07-13 20:35:17,968 INFO L78 Accepts]: Start accepts. Automaton has 1444 states and 4797 transitions. Word has length 26 [2021-07-13 20:35:17,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:17,968 INFO L482 AbstractCegarLoop]: Abstraction has 1444 states and 4797 transitions. [2021-07-13 20:35:17,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:17,968 INFO L276 IsEmpty]: Start isEmpty. Operand 1444 states and 4797 transitions. [2021-07-13 20:35:17,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:35:17,970 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:17,970 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:35:18,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable451 [2021-07-13 20:35:18,201 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:18,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:18,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1506197498, now seen corresponding path program 9 times [2021-07-13 20:35:18,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:18,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618705721] [2021-07-13 20:35:18,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:18,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:18,621 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:18,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:18,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618705721] [2021-07-13 20:35:18,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618705721] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:18,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044751499] [2021-07-13 20:35:18,621 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 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 [2021-07-13 20:35:18,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:35:18,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:18,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:35:18,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:19,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:19,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:19,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:19,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:35:19,192 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:19,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:19,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:19,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-13 20:35:19,198 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:19,331 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2021-07-13 20:35:19,331 INFO L628 ElimStorePlain]: treesize reduction 93, result has 59.6 percent of original size [2021-07-13 20:35:19,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:19,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:19,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:19,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:35:19,338 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:19,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:19,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:35:19,343 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:19,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:19,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:19,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:19,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:35:19,394 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:19,456 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:19,456 INFO L518 ElimStorePlain]: Eliminatee v_prenex_26 vanished before elimination [2021-07-13 20:35:19,459 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:35:19,459 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 12 variables, input treesize:285, output treesize:51 [2021-07-13 20:35:19,516 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:19,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044751499] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:19,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:19,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:35:19,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838278445] [2021-07-13 20:35:19,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:35:19,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:19,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:35:19,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:35:19,517 INFO L87 Difference]: Start difference. First operand 1444 states and 4797 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:20,114 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 42 [2021-07-13 20:35:20,511 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2021-07-13 20:35:20,703 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 48 [2021-07-13 20:35:21,073 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 60 [2021-07-13 20:35:21,374 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2021-07-13 20:35:21,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:21,435 INFO L93 Difference]: Finished difference Result 2027 states and 6512 transitions. [2021-07-13 20:35:21,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:35:21,436 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:35:21,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:21,439 INFO L225 Difference]: With dead ends: 2027 [2021-07-13 20:35:21,439 INFO L226 Difference]: Without dead ends: 2012 [2021-07-13 20:35:21,440 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 2272.4ms TimeCoverageRelationStatistics Valid=234, Invalid=888, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:35:21,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2012 states. [2021-07-13 20:35:21,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2012 to 1454. [2021-07-13 20:35:21,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1454 states, 1453 states have (on average 3.3269098417068137) internal successors, (4834), 1453 states have internal predecessors, (4834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:21,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1454 states to 1454 states and 4834 transitions. [2021-07-13 20:35:21,461 INFO L78 Accepts]: Start accepts. Automaton has 1454 states and 4834 transitions. Word has length 26 [2021-07-13 20:35:21,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:21,461 INFO L482 AbstractCegarLoop]: Abstraction has 1454 states and 4834 transitions. [2021-07-13 20:35:21,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:21,461 INFO L276 IsEmpty]: Start isEmpty. Operand 1454 states and 4834 transitions. [2021-07-13 20:35:21,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:35:21,464 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:21,464 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:35:21,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable478,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:35:21,680 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:21,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:21,680 INFO L82 PathProgramCache]: Analyzing trace with hash 247191222, now seen corresponding path program 10 times [2021-07-13 20:35:21,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:21,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703352102] [2021-07-13 20:35:21,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:21,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:22,150 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:22,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:22,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703352102] [2021-07-13 20:35:22,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703352102] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:22,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234050908] [2021-07-13 20:35:22,151 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 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 [2021-07-13 20:35:22,177 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:35:22,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:22,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:35:22,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:22,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:22,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:22,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:22,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:22,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:22,440 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:35:22,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:35:22,441 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:22,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:22,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:22,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:22,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:22,454 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:22,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 27 [2021-07-13 20:35:22,457 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:22,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:22,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:22,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:22,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:22,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:22,476 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:35:22,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-07-13 20:35:22,478 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:22,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:22,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:22,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:22,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:22,490 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:35:22,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:35:22,491 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:22,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:22,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:22,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:22,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:22,502 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:35:22,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:35:22,502 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:22,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:22,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:22,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:22,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:22,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:22,522 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:22,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 24 [2021-07-13 20:35:22,524 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:22,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:22,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:22,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:22,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:22,535 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:35:22,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:35:22,535 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:22,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:22,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:22,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:22,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:22,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:22,548 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:22,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-07-13 20:35:22,552 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:22,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:22,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:22,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:22,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:22,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:22,564 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:35:22,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:35:22,565 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:22,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:22,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:22,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:22,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:22,578 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:22,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 24 [2021-07-13 20:35:22,586 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:22,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:22,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:22,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:22,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:22,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:22,599 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:35:22,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:35:22,599 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:22,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:22,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:22,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:22,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:22,610 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:35:22,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-07-13 20:35:22,611 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:22,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:22,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:22,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:22,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:22,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:22,624 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:35:22,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-07-13 20:35:22,626 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:22,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:22,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:22,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:22,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:22,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:22,637 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:35:22,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:35:22,638 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:22,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:22,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:22,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:22,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:22,652 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:22,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 27 [2021-07-13 20:35:22,654 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:22,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:22,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:22,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:22,663 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:35:22,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 20 [2021-07-13 20:35:22,664 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:22,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:22,733 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:35:22,733 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:729, output treesize:181 [2021-07-13 20:35:22,947 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:22,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234050908] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:22,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:22,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-13 20:35:22,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41648443] [2021-07-13 20:35:22,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:35:22,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:22,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:35:22,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:35:22,948 INFO L87 Difference]: Start difference. First operand 1454 states and 4834 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:24,813 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 63 [2021-07-13 20:35:25,107 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 62 [2021-07-13 20:35:25,357 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-07-13 20:35:25,597 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2021-07-13 20:35:25,865 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 38 [2021-07-13 20:35:25,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:25,982 INFO L93 Difference]: Finished difference Result 2385 states and 7601 transitions. [2021-07-13 20:35:25,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:35:25,982 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:35:25,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:25,987 INFO L225 Difference]: With dead ends: 2385 [2021-07-13 20:35:25,987 INFO L226 Difference]: Without dead ends: 2355 [2021-07-13 20:35:25,988 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 3128.9ms TimeCoverageRelationStatistics Valid=381, Invalid=1781, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:35:25,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2355 states. [2021-07-13 20:35:26,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2355 to 1467. [2021-07-13 20:35:26,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1467 states, 1466 states have (on average 3.3342428376534787) internal successors, (4888), 1466 states have internal predecessors, (4888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:26,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1467 states to 1467 states and 4888 transitions. [2021-07-13 20:35:26,012 INFO L78 Accepts]: Start accepts. Automaton has 1467 states and 4888 transitions. Word has length 26 [2021-07-13 20:35:26,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:26,012 INFO L482 AbstractCegarLoop]: Abstraction has 1467 states and 4888 transitions. [2021-07-13 20:35:26,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:26,012 INFO L276 IsEmpty]: Start isEmpty. Operand 1467 states and 4888 transitions. [2021-07-13 20:35:26,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:35:26,014 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:26,014 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:35:26,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2021-07-13 20:35:26,230 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:26,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:26,230 INFO L82 PathProgramCache]: Analyzing trace with hash 317421942, now seen corresponding path program 11 times [2021-07-13 20:35:26,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:26,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278762722] [2021-07-13 20:35:26,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:26,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:26,543 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-07-13 20:35:26,660 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2021-07-13 20:35:26,859 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:26,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:26,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278762722] [2021-07-13 20:35:26,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278762722] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:26,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567159721] [2021-07-13 20:35:26,860 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 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 [2021-07-13 20:35:26,913 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:35:26,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:26,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:35:26,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:27,297 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-07-13 20:35:27,502 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 51 [2021-07-13 20:35:27,559 INFO L446 ElimStorePlain]: Different costs {1=[A, v_prenex_37], 2=[v_prenex_39, v_prenex_38]} [2021-07-13 20:35:27,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:27,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-07-13 20:35:27,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:27,675 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-07-13 20:35:27,675 INFO L628 ElimStorePlain]: treesize reduction 54, result has 72.0 percent of original size [2021-07-13 20:35:27,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:27,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:35:27,681 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:27,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:27,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:27,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:27,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:35:27,732 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:27,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:27,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:27,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:27,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:27,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:35:27,780 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:27,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:27,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:27,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:35:27,785 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:27,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:27,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:35:27,820 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 7 variables, input treesize:205, output treesize:51 [2021-07-13 20:35:27,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:27,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567159721] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:27,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:27,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:35:27,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072709615] [2021-07-13 20:35:27,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:35:27,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:27,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:35:27,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:35:27,880 INFO L87 Difference]: Start difference. First operand 1467 states and 4888 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:28,507 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2021-07-13 20:35:28,735 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-07-13 20:35:29,054 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 50 [2021-07-13 20:35:29,330 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 48 [2021-07-13 20:35:29,819 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-07-13 20:35:30,212 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 61 [2021-07-13 20:35:30,411 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 72 [2021-07-13 20:35:30,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:30,600 INFO L93 Difference]: Finished difference Result 1957 states and 6396 transitions. [2021-07-13 20:35:30,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:35:30,600 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:35:30,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:30,604 INFO L225 Difference]: With dead ends: 1957 [2021-07-13 20:35:30,604 INFO L226 Difference]: Without dead ends: 1942 [2021-07-13 20:35:30,604 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 3162.6ms TimeCoverageRelationStatistics Valid=273, Invalid=1209, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:35:30,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1942 states. [2021-07-13 20:35:30,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1942 to 1470. [2021-07-13 20:35:30,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1470 states, 1469 states have (on average 3.3356024506466984) internal successors, (4900), 1469 states have internal predecessors, (4900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:30,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1470 states to 1470 states and 4900 transitions. [2021-07-13 20:35:30,626 INFO L78 Accepts]: Start accepts. Automaton has 1470 states and 4900 transitions. Word has length 26 [2021-07-13 20:35:30,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:30,626 INFO L482 AbstractCegarLoop]: Abstraction has 1470 states and 4900 transitions. [2021-07-13 20:35:30,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:30,626 INFO L276 IsEmpty]: Start isEmpty. Operand 1470 states and 4900 transitions. [2021-07-13 20:35:30,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:35:30,628 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:30,628 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:35:30,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable524 [2021-07-13 20:35:30,844 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:30,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:30,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1300110838, now seen corresponding path program 12 times [2021-07-13 20:35:30,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:30,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879689995] [2021-07-13 20:35:30,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:30,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:31,177 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 45 [2021-07-13 20:35:31,335 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2021-07-13 20:35:31,395 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:31,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:31,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879689995] [2021-07-13 20:35:31,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879689995] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:31,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362044985] [2021-07-13 20:35:31,396 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 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 [2021-07-13 20:35:31,437 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:35:31,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:31,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:35:31,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:31,775 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-07-13 20:35:31,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:31,832 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:35:31,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-13 20:35:31,833 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:31,945 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-07-13 20:35:31,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:31,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:31,957 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:31,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-13 20:35:31,958 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:32,068 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-07-13 20:35:32,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:32,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:32,081 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:32,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:35:32,084 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:32,194 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-07-13 20:35:32,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:32,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:32,207 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:35:32,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:35:32,209 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:32,314 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-07-13 20:35:32,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:32,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:32,327 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:35:32,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:35:32,329 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:32,432 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-07-13 20:35:32,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:32,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:32,443 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:32,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:35:32,447 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:32,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:32,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:32,556 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:32,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:35:32,558 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:32,652 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:32,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:32,662 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:32,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:35:32,668 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:32,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:32,763 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:35:32,763 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:325, output treesize:174 [2021-07-13 20:35:32,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:32,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362044985] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:32,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:32,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:35:32,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326370705] [2021-07-13 20:35:32,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:35:32,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:32,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:35:32,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:35:32,957 INFO L87 Difference]: Start difference. First operand 1470 states and 4900 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:33,293 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2021-07-13 20:35:33,716 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 47 [2021-07-13 20:35:34,058 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2021-07-13 20:35:34,317 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-07-13 20:35:34,604 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-07-13 20:35:34,788 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-07-13 20:35:34,956 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 42 [2021-07-13 20:35:35,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:35,029 INFO L93 Difference]: Finished difference Result 2349 states and 7518 transitions. [2021-07-13 20:35:35,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:35:35,029 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:35:35,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:35,034 INFO L225 Difference]: With dead ends: 2349 [2021-07-13 20:35:35,034 INFO L226 Difference]: Without dead ends: 2319 [2021-07-13 20:35:35,034 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 2544.9ms TimeCoverageRelationStatistics Valid=255, Invalid=935, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:35:35,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2319 states. [2021-07-13 20:35:35,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2319 to 1476. [2021-07-13 20:35:35,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1476 states, 1475 states have (on average 3.3403389830508474) internal successors, (4927), 1475 states have internal predecessors, (4927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:35,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1476 states to 1476 states and 4927 transitions. [2021-07-13 20:35:35,058 INFO L78 Accepts]: Start accepts. Automaton has 1476 states and 4927 transitions. Word has length 26 [2021-07-13 20:35:35,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:35,058 INFO L482 AbstractCegarLoop]: Abstraction has 1476 states and 4927 transitions. [2021-07-13 20:35:35,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:35,058 INFO L276 IsEmpty]: Start isEmpty. Operand 1476 states and 4927 transitions. [2021-07-13 20:35:35,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:35:35,060 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:35,061 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:35:35,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable534,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:35:35,277 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:35,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:35,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1219202938, now seen corresponding path program 39 times [2021-07-13 20:35:35,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:35,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280512448] [2021-07-13 20:35:35,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:35,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:35,725 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:35,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:35,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280512448] [2021-07-13 20:35:35,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280512448] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:35,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211441411] [2021-07-13 20:35:35,726 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 [2021-07-13 20:35:35,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:35:35,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:35,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:35:35,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:36,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:36,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:36,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:36,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:36,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:36,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:36,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-13 20:35:36,077 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:36,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:36,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:36,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:36,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:36,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:36,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:36,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 7 [2021-07-13 20:35:36,087 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:36,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:36,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:36,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:36,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:36,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:36,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:36,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 16 [2021-07-13 20:35:36,096 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:36,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:36,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:36,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:36,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:36,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:36,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:36,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 19 [2021-07-13 20:35:36,106 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:36,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:36,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:36,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:36,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:36,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:36,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:36,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2021-07-13 20:35:36,115 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:36,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:36,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:36,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:36,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:36,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:36,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:36,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 19 [2021-07-13 20:35:36,125 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:36,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:36,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:36,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:36,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:36,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:36,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:36,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 16 [2021-07-13 20:35:36,136 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:36,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:36,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:36,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:36,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:36,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:36,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:36,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-07-13 20:35:36,146 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:36,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:36,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:36,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:36,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:36,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:36,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:36,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 16 [2021-07-13 20:35:36,157 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:36,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:36,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:36,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:36,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:36,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:36,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:36,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-07-13 20:35:36,167 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:36,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:36,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:36,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:36,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:36,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:36,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:36,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 16 [2021-07-13 20:35:36,177 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:36,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:36,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:36,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:36,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:36,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:36,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:36,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 13 [2021-07-13 20:35:36,187 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:36,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:36,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:36,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:36,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:36,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:36,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:36,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2021-07-13 20:35:36,197 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:36,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:36,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:36,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:36,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:36,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:36,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:36,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 13 [2021-07-13 20:35:36,206 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:36,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:36,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:36,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:36,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:36,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:36,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:36,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 13 [2021-07-13 20:35:36,215 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:36,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:36,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:36,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:36,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:36,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-07-13 20:35:36,221 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:36,260 INFO L628 ElimStorePlain]: treesize reduction 48, result has 49.5 percent of original size [2021-07-13 20:35:36,261 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:35:36,261 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:921, output treesize:47 [2021-07-13 20:35:36,345 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:36,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211441411] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:36,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:36,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-07-13 20:35:36,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180961217] [2021-07-13 20:35:36,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:35:36,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:36,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:35:36,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:35:36,346 INFO L87 Difference]: Start difference. First operand 1476 states and 4927 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:36,881 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2021-07-13 20:35:37,172 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-07-13 20:35:37,337 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2021-07-13 20:35:37,520 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 75 [2021-07-13 20:35:38,097 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2021-07-13 20:35:38,532 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-07-13 20:35:38,763 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 67 [2021-07-13 20:35:39,303 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 62 [2021-07-13 20:35:39,475 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 50 [2021-07-13 20:35:39,634 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 53 [2021-07-13 20:35:39,993 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2021-07-13 20:35:40,168 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2021-07-13 20:35:40,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:40,470 INFO L93 Difference]: Finished difference Result 3196 states and 9983 transitions. [2021-07-13 20:35:40,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:35:40,471 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:35:40,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:40,476 INFO L225 Difference]: With dead ends: 3196 [2021-07-13 20:35:40,477 INFO L226 Difference]: Without dead ends: 3109 [2021-07-13 20:35:40,477 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1167 ImplicationChecksByTransitivity, 4078.8ms TimeCoverageRelationStatistics Valid=620, Invalid=3286, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 20:35:40,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3109 states. [2021-07-13 20:35:40,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3109 to 1509. [2021-07-13 20:35:40,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1509 states, 1508 states have (on average 3.343501326259947) internal successors, (5042), 1508 states have internal predecessors, (5042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:40,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1509 states to 1509 states and 5042 transitions. [2021-07-13 20:35:40,507 INFO L78 Accepts]: Start accepts. Automaton has 1509 states and 5042 transitions. Word has length 26 [2021-07-13 20:35:40,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:40,507 INFO L482 AbstractCegarLoop]: Abstraction has 1509 states and 5042 transitions. [2021-07-13 20:35:40,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:40,508 INFO L276 IsEmpty]: Start isEmpty. Operand 1509 states and 5042 transitions. [2021-07-13 20:35:40,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:35:40,510 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:40,510 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:35:40,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable549 [2021-07-13 20:35:40,726 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:40,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:40,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1873451990, now seen corresponding path program 40 times [2021-07-13 20:35:40,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:40,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142370702] [2021-07-13 20:35:40,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:40,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:41,027 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2021-07-13 20:35:41,307 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:41,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:41,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142370702] [2021-07-13 20:35:41,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142370702] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:41,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857499246] [2021-07-13 20:35:41,308 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 [2021-07-13 20:35:41,333 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:35:41,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:41,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:35:41,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:41,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:41,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:41,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:41,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:41,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:41,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:41,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-13 20:35:41,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:41,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:41,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:41,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:41,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:41,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:41,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:41,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-07-13 20:35:41,906 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:41,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:41,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:41,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:41,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:41,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:41,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:41,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-13 20:35:41,915 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:41,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:41,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:41,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:41,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:41,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:41,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:41,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2021-07-13 20:35:41,924 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:41,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:41,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:41,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:41,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:41,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:41,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:41,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-13 20:35:41,933 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:41,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:41,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:41,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:41,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:41,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:41,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:41,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-07-13 20:35:41,942 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:41,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:41,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:41,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:41,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:41,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:41,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:41,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 13 [2021-07-13 20:35:41,951 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:41,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:41,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:41,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:41,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:41,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:41,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:41,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2021-07-13 20:35:41,960 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:41,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:41,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:41,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:41,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:41,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:41,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:41,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-13 20:35:41,969 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:41,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:41,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:41,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:41,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:41,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:41,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:41,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-07-13 20:35:41,978 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:41,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:41,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:41,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:41,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:41,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:41,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:41,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 16 [2021-07-13 20:35:41,987 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:41,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:41,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:41,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:41,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:41,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:41,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:41,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-07-13 20:35:41,995 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:41,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:42,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:42,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:42,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:42,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:42,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:42,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 13 [2021-07-13 20:35:42,004 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:42,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:42,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:42,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:42,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:42,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:42,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:42,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-13 20:35:42,012 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:42,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:42,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:42,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:42,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:42,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:42,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:42,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-13 20:35:42,020 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:42,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:42,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:42,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:42,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:42,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-07-13 20:35:42,025 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:42,056 INFO L628 ElimStorePlain]: treesize reduction 38, result has 49.3 percent of original size [2021-07-13 20:35:42,057 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:35:42,057 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:31 [2021-07-13 20:35:42,094 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:42,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857499246] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:42,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:42,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-07-13 20:35:42,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716437675] [2021-07-13 20:35:42,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:35:42,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:42,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:35:42,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:35:42,095 INFO L87 Difference]: Start difference. First operand 1509 states and 5042 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:42,636 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2021-07-13 20:35:42,973 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2021-07-13 20:35:43,124 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 67 [2021-07-13 20:35:43,592 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2021-07-13 20:35:44,070 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 70 [2021-07-13 20:35:44,373 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 61 [2021-07-13 20:35:44,879 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 43 [2021-07-13 20:35:45,053 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-07-13 20:35:45,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:45,294 INFO L93 Difference]: Finished difference Result 2965 states and 9388 transitions. [2021-07-13 20:35:45,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:35:45,295 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:35:45,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:45,300 INFO L225 Difference]: With dead ends: 2965 [2021-07-13 20:35:45,300 INFO L226 Difference]: Without dead ends: 2920 [2021-07-13 20:35:45,300 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 3337.4ms TimeCoverageRelationStatistics Valid=535, Invalid=2435, Unknown=0, NotChecked=0, Total=2970 [2021-07-13 20:35:45,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2920 states. [2021-07-13 20:35:45,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2920 to 1512. [2021-07-13 20:35:45,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1512 states, 1511 states have (on average 3.345466578424884) internal successors, (5055), 1511 states have internal predecessors, (5055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:45,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 5055 transitions. [2021-07-13 20:35:45,328 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 5055 transitions. Word has length 26 [2021-07-13 20:35:45,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:45,328 INFO L482 AbstractCegarLoop]: Abstraction has 1512 states and 5055 transitions. [2021-07-13 20:35:45,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:45,328 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 5055 transitions. [2021-07-13 20:35:45,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:35:45,330 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:45,330 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:35:45,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable568 [2021-07-13 20:35:45,547 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:45,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:45,547 INFO L82 PathProgramCache]: Analyzing trace with hash -39803338, now seen corresponding path program 41 times [2021-07-13 20:35:45,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:45,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983434318] [2021-07-13 20:35:45,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:45,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:45,981 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:45,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:45,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983434318] [2021-07-13 20:35:45,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983434318] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:45,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486676883] [2021-07-13 20:35:45,982 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 [2021-07-13 20:35:46,010 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:35:46,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:46,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:35:46,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:46,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:46,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:46,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:46,501 INFO L354 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2021-07-13 20:35:46,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 30 [2021-07-13 20:35:46,503 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:46,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:46,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:46,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:46,527 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:46,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 45 [2021-07-13 20:35:46,534 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:46,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:46,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:46,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:46,562 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-07-13 20:35:46,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 37 [2021-07-13 20:35:46,566 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:46,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:46,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:46,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:46,593 INFO L354 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2021-07-13 20:35:46,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 30 [2021-07-13 20:35:46,595 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:46,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:46,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:46,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:46,614 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:35:46,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 1 [2021-07-13 20:35:46,615 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:46,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:46,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:46,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:46,642 INFO L354 Elim1Store]: treesize reduction 23, result has 30.3 percent of original size [2021-07-13 20:35:46,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 25 [2021-07-13 20:35:46,643 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:46,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:46,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:46,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:46,668 INFO L354 Elim1Store]: treesize reduction 26, result has 21.2 percent of original size [2021-07-13 20:35:46,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 25 [2021-07-13 20:35:46,670 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:46,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:46,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:46,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:46,688 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:35:46,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-07-13 20:35:46,689 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:46,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:46,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:46,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:46,705 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:35:46,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-07-13 20:35:46,706 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:46,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:46,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:46,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:46,723 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:35:46,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-07-13 20:35:46,724 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:46,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:46,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:46,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:46,740 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:35:46,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-07-13 20:35:46,741 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:46,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:46,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:46,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:46,765 INFO L354 Elim1Store]: treesize reduction 23, result has 30.3 percent of original size [2021-07-13 20:35:46,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 25 [2021-07-13 20:35:46,767 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:46,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:46,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:46,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:46,783 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:35:46,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-07-13 20:35:46,784 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:46,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:46,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:46,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:46,800 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:35:46,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-07-13 20:35:46,801 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:46,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:46,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:46,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:46,828 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:35:46,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-07-13 20:35:46,829 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:46,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:46,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:46,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:46,839 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:35:46,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-07-13 20:35:46,839 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:46,942 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-07-13 20:35:46,942 INFO L628 ElimStorePlain]: treesize reduction 69, result has 64.2 percent of original size [2021-07-13 20:35:46,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:35:46,944 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:841, output treesize:133 [2021-07-13 20:35:47,078 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:47,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486676883] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:47,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:47,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-07-13 20:35:47,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483682917] [2021-07-13 20:35:47,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:35:47,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:47,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:35:47,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:35:47,080 INFO L87 Difference]: Start difference. First operand 1512 states and 5055 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:47,548 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2021-07-13 20:35:48,074 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 70 [2021-07-13 20:35:48,294 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2021-07-13 20:35:48,897 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 62 [2021-07-13 20:35:49,063 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2021-07-13 20:35:49,309 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 70 [2021-07-13 20:35:50,161 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 49 [2021-07-13 20:35:50,355 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 48 [2021-07-13 20:35:50,489 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 43 [2021-07-13 20:35:50,683 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 50 [2021-07-13 20:35:51,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:51,289 INFO L93 Difference]: Finished difference Result 3428 states and 10667 transitions. [2021-07-13 20:35:51,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 20:35:51,290 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:35:51,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:51,296 INFO L225 Difference]: With dead ends: 3428 [2021-07-13 20:35:51,296 INFO L226 Difference]: Without dead ends: 3368 [2021-07-13 20:35:51,296 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1369 ImplicationChecksByTransitivity, 4111.3ms TimeCoverageRelationStatistics Valid=833, Invalid=3457, Unknown=0, NotChecked=0, Total=4290 [2021-07-13 20:35:51,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3368 states. [2021-07-13 20:35:51,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3368 to 1525. [2021-07-13 20:35:51,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1525 states, 1524 states have (on average 3.356299212598425) internal successors, (5115), 1524 states have internal predecessors, (5115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:51,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1525 states to 1525 states and 5115 transitions. [2021-07-13 20:35:51,328 INFO L78 Accepts]: Start accepts. Automaton has 1525 states and 5115 transitions. Word has length 26 [2021-07-13 20:35:51,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:51,328 INFO L482 AbstractCegarLoop]: Abstraction has 1525 states and 5115 transitions. [2021-07-13 20:35:51,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:51,328 INFO L276 IsEmpty]: Start isEmpty. Operand 1525 states and 5115 transitions. [2021-07-13 20:35:51,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:35:51,330 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:51,330 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:35:51,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable682 [2021-07-13 20:35:51,546 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:51,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:51,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1882815202, now seen corresponding path program 13 times [2021-07-13 20:35:51,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:51,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355707278] [2021-07-13 20:35:51,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:51,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:51,985 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2021-07-13 20:35:52,117 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-07-13 20:35:52,207 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:52,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:52,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355707278] [2021-07-13 20:35:52,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355707278] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:52,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439658426] [2021-07-13 20:35:52,207 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 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 [2021-07-13 20:35:52,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:52,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:35:52,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:52,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:52,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-13 20:35:52,570 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:52,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:52,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:35:52,575 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:52,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:52,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:35:52,581 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:52,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:52,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:35:52,587 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:52,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:52,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:35:52,592 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:52,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:52,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:35:52,598 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:52,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:52,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:35:52,603 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:52,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:52,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:35:52,609 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:52,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:52,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:35:52,615 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:52,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:52,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-13 20:35:52,620 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:52,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:52,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:35:52,627 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:52,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:52,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:35:52,633 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:52,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:52,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:35:52,638 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:52,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:52,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:35:52,644 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:52,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:52,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-07-13 20:35:52,648 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:52,713 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-07-13 20:35:52,715 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:35:52,715 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-07-13 20:35:52,761 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:52,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439658426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:52,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:52,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:35:52,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100698178] [2021-07-13 20:35:52,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:35:52,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:52,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:35:52,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:35:52,762 INFO L87 Difference]: Start difference. First operand 1525 states and 5115 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:53,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:53,496 INFO L93 Difference]: Finished difference Result 1908 states and 6274 transitions. [2021-07-13 20:35:53,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:35:53,496 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:35:53,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:53,499 INFO L225 Difference]: With dead ends: 1908 [2021-07-13 20:35:53,499 INFO L226 Difference]: Without dead ends: 1893 [2021-07-13 20:35:53,499 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1231.4ms TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:35:53,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1893 states. [2021-07-13 20:35:53,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1893 to 1533. [2021-07-13 20:35:53,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1533 states, 1532 states have (on average 3.352480417754569) internal successors, (5136), 1532 states have internal predecessors, (5136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:53,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1533 states to 1533 states and 5136 transitions. [2021-07-13 20:35:53,519 INFO L78 Accepts]: Start accepts. Automaton has 1533 states and 5136 transitions. Word has length 26 [2021-07-13 20:35:53,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:53,519 INFO L482 AbstractCegarLoop]: Abstraction has 1533 states and 5136 transitions. [2021-07-13 20:35:53,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:53,519 INFO L276 IsEmpty]: Start isEmpty. Operand 1533 states and 5136 transitions. [2021-07-13 20:35:53,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:35:53,521 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:53,521 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:35:53,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable795 [2021-07-13 20:35:53,737 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:53,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:53,737 INFO L82 PathProgramCache]: Analyzing trace with hash 950706158, now seen corresponding path program 14 times [2021-07-13 20:35:53,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:53,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525211576] [2021-07-13 20:35:53,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:53,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:53,952 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2021-07-13 20:35:54,077 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 35 [2021-07-13 20:35:54,195 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2021-07-13 20:35:54,310 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2021-07-13 20:35:54,448 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:54,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:54,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525211576] [2021-07-13 20:35:54,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525211576] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:54,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990551253] [2021-07-13 20:35:54,449 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 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 [2021-07-13 20:35:54,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:35:54,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:54,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:35:54,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:54,810 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-07-13 20:35:54,934 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_60, v_prenex_62], 3=[A, v_prenex_54, v_prenex_64, v_prenex_58, v_prenex_56, v_prenex_66]} [2021-07-13 20:35:54,954 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:54,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-13 20:35:54,955 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:55,106 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2021-07-13 20:35:55,107 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:55,125 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:55,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-13 20:35:55,129 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:55,278 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-13 20:35:55,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:55,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:55,301 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-13 20:35:55,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 27 [2021-07-13 20:35:55,305 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:55,451 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-07-13 20:35:55,451 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:55,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:55,473 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-13 20:35:55,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 30 [2021-07-13 20:35:55,477 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:55,615 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2021-07-13 20:35:55,616 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:55,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:55,636 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-07-13 20:35:55,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 26 [2021-07-13 20:35:55,637 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:55,772 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-07-13 20:35:55,772 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:55,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:55,789 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:55,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 28 [2021-07-13 20:35:55,794 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:55,929 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-07-13 20:35:55,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:55,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:55,947 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-07-13 20:35:55,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 23 [2021-07-13 20:35:55,949 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:56,081 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-07-13 20:35:56,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:56,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:56,103 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-13 20:35:56,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 30 [2021-07-13 20:35:56,105 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:56,236 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-07-13 20:35:56,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:56,250 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:35:56,250 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:391, output treesize:457 [2021-07-13 20:35:56,566 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2021-07-13 20:35:56,782 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-07-13 20:35:56,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:56,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990551253] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:56,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:56,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:35:56,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871546848] [2021-07-13 20:35:56,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:35:56,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:56,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:35:56,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:35:56,878 INFO L87 Difference]: Start difference. First operand 1533 states and 5136 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:57,783 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 45 [2021-07-13 20:35:58,209 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-07-13 20:35:58,814 WARN L205 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 99 [2021-07-13 20:35:58,997 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-07-13 20:35:59,409 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2021-07-13 20:35:59,831 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 47 [2021-07-13 20:36:00,210 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 47 [2021-07-13 20:36:00,472 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 55 [2021-07-13 20:36:01,003 WARN L205 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 72 [2021-07-13 20:36:01,259 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 34 [2021-07-13 20:36:01,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:36:01,321 INFO L93 Difference]: Finished difference Result 2211 states and 7083 transitions. [2021-07-13 20:36:01,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:36:01,321 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:36:01,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:36:01,325 INFO L225 Difference]: With dead ends: 2211 [2021-07-13 20:36:01,325 INFO L226 Difference]: Without dead ends: 2181 [2021-07-13 20:36:01,326 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 5173.1ms TimeCoverageRelationStatistics Valid=256, Invalid=1384, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:36:01,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2181 states. [2021-07-13 20:36:01,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2181 to 1518. [2021-07-13 20:36:01,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1518 states, 1517 states have (on average 3.3513513513513513) internal successors, (5084), 1517 states have internal predecessors, (5084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:01,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1518 states to 1518 states and 5084 transitions. [2021-07-13 20:36:01,374 INFO L78 Accepts]: Start accepts. Automaton has 1518 states and 5084 transitions. Word has length 26 [2021-07-13 20:36:01,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:36:01,374 INFO L482 AbstractCegarLoop]: Abstraction has 1518 states and 5084 transitions. [2021-07-13 20:36:01,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:01,374 INFO L276 IsEmpty]: Start isEmpty. Operand 1518 states and 5084 transitions. [2021-07-13 20:36:01,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:36:01,394 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:36:01,394 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:36:01,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable825,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:36:01,594 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:36:01,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:36:01,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1721464722, now seen corresponding path program 15 times [2021-07-13 20:36:01,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:36:01,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211456822] [2021-07-13 20:36:01,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:36:01,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:36:01,831 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2021-07-13 20:36:02,106 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2021-07-13 20:36:02,274 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:02,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:36:02,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211456822] [2021-07-13 20:36:02,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211456822] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:02,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141946724] [2021-07-13 20:36:02,274 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 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 [2021-07-13 20:36:02,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:36:02,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:36:02,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:36:02,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:36:02,647 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:02,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-13 20:36:02,649 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:02,658 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:36:02,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 16 [2021-07-13 20:36:02,659 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:02,676 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:36:02,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:36:02,678 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:02,695 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:36:02,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-13 20:36:02,697 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:02,712 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:02,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-13 20:36:02,718 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:02,733 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:02,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-13 20:36:02,735 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:02,744 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:36:02,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:36:02,745 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:02,755 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:36:02,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 22 [2021-07-13 20:36:02,755 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:02,773 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:36:02,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-07-13 20:36:02,778 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:02,796 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:36:02,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-13 20:36:02,800 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:02,830 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:36:02,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:36:02,831 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:02,839 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:36:02,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:36:02,840 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:02,849 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:36:02,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:36:02,849 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:02,858 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:36:02,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:36:02,859 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:02,867 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:36:02,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:36:02,868 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:02,883 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:36:02,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-13 20:36:02,884 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:03,001 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-07-13 20:36:03,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:03,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:36:03,014 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:737, output treesize:430 [2021-07-13 20:36:03,351 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-07-13 20:36:03,571 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-07-13 20:36:03,692 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:03,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141946724] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:03,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:36:03,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-07-13 20:36:03,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337914237] [2021-07-13 20:36:03,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:36:03,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:36:03,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:36:03,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:36:03,693 INFO L87 Difference]: Start difference. First operand 1518 states and 5084 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:04,415 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 34 [2021-07-13 20:36:04,777 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 57 [2021-07-13 20:36:04,947 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 46 [2021-07-13 20:36:05,145 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 50 [2021-07-13 20:36:05,410 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 58 [2021-07-13 20:36:05,578 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2021-07-13 20:36:05,809 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2021-07-13 20:36:06,083 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-07-13 20:36:06,356 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2021-07-13 20:36:06,640 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2021-07-13 20:36:06,950 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 67 [2021-07-13 20:36:07,186 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 35 [2021-07-13 20:36:07,492 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 47 [2021-07-13 20:36:07,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:36:07,573 INFO L93 Difference]: Finished difference Result 2207 states and 7076 transitions. [2021-07-13 20:36:07,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:36:07,573 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:36:07,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:36:07,577 INFO L225 Difference]: With dead ends: 2207 [2021-07-13 20:36:07,577 INFO L226 Difference]: Without dead ends: 2192 [2021-07-13 20:36:07,578 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 4535.6ms TimeCoverageRelationStatistics Valid=274, Invalid=1532, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:36:07,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2192 states. [2021-07-13 20:36:07,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2192 to 1522. [2021-07-13 20:36:07,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1522 states, 1521 states have (on average 3.356344510190664) internal successors, (5105), 1521 states have internal predecessors, (5105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:07,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1522 states to 1522 states and 5105 transitions. [2021-07-13 20:36:07,604 INFO L78 Accepts]: Start accepts. Automaton has 1522 states and 5105 transitions. Word has length 26 [2021-07-13 20:36:07,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:36:07,604 INFO L482 AbstractCegarLoop]: Abstraction has 1522 states and 5105 transitions. [2021-07-13 20:36:07,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:07,604 INFO L276 IsEmpty]: Start isEmpty. Operand 1522 states and 5105 transitions. [2021-07-13 20:36:07,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:36:07,606 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:36:07,606 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:36:07,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable856,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:36:07,821 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:36:07,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:36:07,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1741432748, now seen corresponding path program 16 times [2021-07-13 20:36:07,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:36:07,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466346160] [2021-07-13 20:36:07,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:36:07,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:36:08,174 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 36 [2021-07-13 20:36:08,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:08,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:36:08,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466346160] [2021-07-13 20:36:08,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466346160] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:08,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109601923] [2021-07-13 20:36:08,293 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 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 [2021-07-13 20:36:08,318 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:36:08,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:36:08,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:36:08,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:36:08,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:08,610 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:08,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:36:08,611 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:08,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:08,621 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:08,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:36:08,624 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:08,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:08,635 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:08,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:36:08,638 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:08,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:08,649 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:08,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-13 20:36:08,650 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:08,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:08,659 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:36:08,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-07-13 20:36:08,660 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:08,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:08,668 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:36:08,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:36:08,669 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:08,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:08,678 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:36:08,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:36:08,678 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:08,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:08,687 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:36:08,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:36:08,688 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:08,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:08,698 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:08,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:36:08,702 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:08,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:08,713 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:36:08,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-13 20:36:08,714 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:08,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:08,725 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:36:08,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:36:08,726 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:08,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:08,735 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:36:08,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:36:08,735 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:08,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:08,745 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:36:08,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:36:08,747 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:08,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:08,755 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:36:08,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:36:08,756 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:08,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:08,763 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:36:08,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-07-13 20:36:08,764 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:08,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:08,770 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:36:08,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:36:08,770 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:08,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:08,876 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:36:08,877 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:705, output treesize:180 [2021-07-13 20:36:09,050 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-07-13 20:36:09,155 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:09,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109601923] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:09,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:36:09,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:36:09,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106847584] [2021-07-13 20:36:09,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:36:09,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:36:09,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:36:09,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:36:09,156 INFO L87 Difference]: Start difference. First operand 1522 states and 5105 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:09,903 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-07-13 20:36:09,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:36:09,937 INFO L93 Difference]: Finished difference Result 2055 states and 6709 transitions. [2021-07-13 20:36:09,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:36:09,938 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:36:09,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:36:09,941 INFO L225 Difference]: With dead ends: 2055 [2021-07-13 20:36:09,942 INFO L226 Difference]: Without dead ends: 2040 [2021-07-13 20:36:09,942 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1324.3ms TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:36:09,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2040 states. [2021-07-13 20:36:09,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2040 to 1529. [2021-07-13 20:36:09,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 3.356020942408377) internal successors, (5128), 1528 states have internal predecessors, (5128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:09,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 5128 transitions. [2021-07-13 20:36:09,972 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 5128 transitions. Word has length 26 [2021-07-13 20:36:09,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:36:09,972 INFO L482 AbstractCegarLoop]: Abstraction has 1529 states and 5128 transitions. [2021-07-13 20:36:09,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:09,972 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 5128 transitions. [2021-07-13 20:36:09,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:36:09,984 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:36:09,984 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:36:10,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable911,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:36:10,190 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:36:10,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:36:10,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1484642536, now seen corresponding path program 17 times [2021-07-13 20:36:10,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:36:10,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366318578] [2021-07-13 20:36:10,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:36:10,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:36:10,620 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:10,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:36:10,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366318578] [2021-07-13 20:36:10,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366318578] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:10,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947861107] [2021-07-13 20:36:10,620 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 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 [2021-07-13 20:36:10,646 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:36:10,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:36:10,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:36:10,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:36:10,954 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-07-13 20:36:11,161 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 49 [2021-07-13 20:36:11,218 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_76], 2=[A, v_prenex_75]} [2021-07-13 20:36:11,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:11,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:36:11,222 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:11,317 INFO L628 ElimStorePlain]: treesize reduction 54, result has 69.8 percent of original size [2021-07-13 20:36:11,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:11,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:11,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:36:11,322 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:11,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:11,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:11,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:11,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:11,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:36:11,367 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:11,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:11,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:11,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:36:11,371 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:11,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:11,405 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:36:11,405 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:193, output treesize:51 [2021-07-13 20:36:11,456 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:11,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947861107] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:11,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:36:11,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:36:11,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095380872] [2021-07-13 20:36:11,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:36:11,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:36:11,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:36:11,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:36:11,457 INFO L87 Difference]: Start difference. First operand 1529 states and 5128 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:12,475 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-07-13 20:36:12,801 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2021-07-13 20:36:12,980 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 70 [2021-07-13 20:36:13,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:36:13,096 INFO L93 Difference]: Finished difference Result 2067 states and 6781 transitions. [2021-07-13 20:36:13,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:36:13,097 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:36:13,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:36:13,101 INFO L225 Difference]: With dead ends: 2067 [2021-07-13 20:36:13,101 INFO L226 Difference]: Without dead ends: 2052 [2021-07-13 20:36:13,101 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 2124.9ms TimeCoverageRelationStatistics Valid=209, Invalid=981, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:36:13,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2052 states. [2021-07-13 20:36:13,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2052 to 1532. [2021-07-13 20:36:13,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1532 states, 1531 states have (on average 3.357282821685173) internal successors, (5140), 1531 states have internal predecessors, (5140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:13,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1532 states to 1532 states and 5140 transitions. [2021-07-13 20:36:13,136 INFO L78 Accepts]: Start accepts. Automaton has 1532 states and 5140 transitions. Word has length 26 [2021-07-13 20:36:13,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:36:13,136 INFO L482 AbstractCegarLoop]: Abstraction has 1532 states and 5140 transitions. [2021-07-13 20:36:13,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:13,136 INFO L276 IsEmpty]: Start isEmpty. Operand 1532 states and 5140 transitions. [2021-07-13 20:36:13,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:36:13,138 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:36:13,138 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:36:13,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable952 [2021-07-13 20:36:13,355 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:36:13,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:36:13,355 INFO L82 PathProgramCache]: Analyzing trace with hash -808425550, now seen corresponding path program 18 times [2021-07-13 20:36:13,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:36:13,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484777124] [2021-07-13 20:36:13,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:36:13,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:36:13,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:13,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:36:13,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484777124] [2021-07-13 20:36:13,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484777124] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:13,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435564939] [2021-07-13 20:36:13,715 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 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 [2021-07-13 20:36:13,747 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:36:13,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:36:13,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:36:13,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:36:14,097 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-07-13 20:36:14,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:14,287 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:14,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-13 20:36:14,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:14,557 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 150 [2021-07-13 20:36:14,557 INFO L628 ElimStorePlain]: treesize reduction 8, result has 97.8 percent of original size [2021-07-13 20:36:14,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:14,582 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:36:14,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-07-13 20:36:14,584 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:14,718 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2021-07-13 20:36:14,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:14,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:14,739 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:14,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-13 20:36:14,746 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:14,877 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-07-13 20:36:14,878 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:14,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:14,897 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:14,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-07-13 20:36:14,904 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:15,151 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 132 [2021-07-13 20:36:15,151 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.1 percent of original size [2021-07-13 20:36:15,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:15,172 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:36:15,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-13 20:36:15,174 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:15,313 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-07-13 20:36:15,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:15,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:15,335 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:36:15,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-13 20:36:15,337 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:15,457 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-07-13 20:36:15,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:15,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:15,478 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:36:15,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-13 20:36:15,481 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:15,595 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-07-13 20:36:15,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:15,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:15,614 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:36:15,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:36:15,616 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:15,727 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-07-13 20:36:15,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:15,745 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:36:15,745 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 24 variables, input treesize:365, output treesize:256 [2021-07-13 20:36:15,938 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-07-13 20:36:16,036 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:16,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435564939] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:16,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:36:16,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:36:16,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662633997] [2021-07-13 20:36:16,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:36:16,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:36:16,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:36:16,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:36:16,037 INFO L87 Difference]: Start difference. First operand 1532 states and 5140 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:16,672 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2021-07-13 20:36:16,963 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 63 [2021-07-13 20:36:17,520 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 122 [2021-07-13 20:36:17,783 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2021-07-13 20:36:18,119 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-07-13 20:36:18,664 WARN L205 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 117 [2021-07-13 20:36:18,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:36:18,718 INFO L93 Difference]: Finished difference Result 2080 states and 6806 transitions. [2021-07-13 20:36:18,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:36:18,718 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:36:18,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:36:18,722 INFO L225 Difference]: With dead ends: 2080 [2021-07-13 20:36:18,722 INFO L226 Difference]: Without dead ends: 2065 [2021-07-13 20:36:18,722 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 3165.6ms TimeCoverageRelationStatistics Valid=215, Invalid=841, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:36:18,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2065 states. [2021-07-13 20:36:18,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2065 to 1529. [2021-07-13 20:36:18,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 3.356020942408377) internal successors, (5128), 1528 states have internal predecessors, (5128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:18,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 5128 transitions. [2021-07-13 20:36:18,745 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 5128 transitions. Word has length 26 [2021-07-13 20:36:18,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:36:18,745 INFO L482 AbstractCegarLoop]: Abstraction has 1529 states and 5128 transitions. [2021-07-13 20:36:18,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:18,745 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 5128 transitions. [2021-07-13 20:36:18,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:36:18,747 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:36:18,747 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:36:18,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable962,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:36:18,963 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:36:18,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:36:18,964 INFO L82 PathProgramCache]: Analyzing trace with hash -2091148486, now seen corresponding path program 19 times [2021-07-13 20:36:18,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:36:18,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790618324] [2021-07-13 20:36:18,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:36:18,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:36:19,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:19,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:36:19,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790618324] [2021-07-13 20:36:19,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790618324] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:19,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986002210] [2021-07-13 20:36:19,381 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 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 [2021-07-13 20:36:19,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:36:19,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:36:19,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:36:19,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:19,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:19,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:19,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:36:19,778 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:19,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:19,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:19,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:19,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:36:19,784 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:19,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:19,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:19,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:19,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:36:19,790 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:19,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:19,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:19,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:19,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:36:19,797 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:19,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:19,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:19,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:19,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:36:19,804 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:19,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:19,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:19,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:19,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:36:19,810 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:19,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:19,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:19,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:19,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:36:19,816 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:19,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:19,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:19,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:19,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-07-13 20:36:19,823 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:19,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:19,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:19,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:19,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-13 20:36:19,829 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:19,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:19,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:19,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:19,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:36:19,836 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:19,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:19,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:19,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:19,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:36:19,843 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:19,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:19,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:19,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:19,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:36:19,850 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:19,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:19,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:19,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:19,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:36:19,855 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:19,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:19,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:19,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:19,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-13 20:36:19,861 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:19,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:19,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:19,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:36:19,865 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:19,942 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-07-13 20:36:19,943 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:36:19,943 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-07-13 20:36:19,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:19,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986002210] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:19,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:36:19,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:36:19,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425951596] [2021-07-13 20:36:19,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:36:19,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:36:19,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:36:19,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:36:19,998 INFO L87 Difference]: Start difference. First operand 1529 states and 5128 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:20,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:36:20,875 INFO L93 Difference]: Finished difference Result 1986 states and 6507 transitions. [2021-07-13 20:36:20,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:36:20,876 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:36:20,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:36:20,879 INFO L225 Difference]: With dead ends: 1986 [2021-07-13 20:36:20,879 INFO L226 Difference]: Without dead ends: 1965 [2021-07-13 20:36:20,880 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 1165.7ms TimeCoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:36:20,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1965 states. [2021-07-13 20:36:20,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1965 to 1570. [2021-07-13 20:36:20,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1570 states, 1569 states have (on average 3.3524537922243467) internal successors, (5260), 1569 states have internal predecessors, (5260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:20,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1570 states to 1570 states and 5260 transitions. [2021-07-13 20:36:20,902 INFO L78 Accepts]: Start accepts. Automaton has 1570 states and 5260 transitions. Word has length 26 [2021-07-13 20:36:20,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:36:20,902 INFO L482 AbstractCegarLoop]: Abstraction has 1570 states and 5260 transitions. [2021-07-13 20:36:20,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:20,903 INFO L276 IsEmpty]: Start isEmpty. Operand 1570 states and 5260 transitions. [2021-07-13 20:36:20,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:36:20,905 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:36:20,905 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:36:21,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable994 [2021-07-13 20:36:21,117 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:36:21,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:36:21,117 INFO L82 PathProgramCache]: Analyzing trace with hash 2036009718, now seen corresponding path program 20 times [2021-07-13 20:36:21,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:36:21,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748278396] [2021-07-13 20:36:21,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:36:21,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:36:21,559 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:21,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:36:21,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748278396] [2021-07-13 20:36:21,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748278396] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:21,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954658374] [2021-07-13 20:36:21,560 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 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 [2021-07-13 20:36:21,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:36:21,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:36:21,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:36:21,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:36:21,921 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:36:21,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:36:21,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:21,935 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:21,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-13 20:36:21,940 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:21,948 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:36:21,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:36:21,948 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:21,965 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:36:21,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:36:21,966 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:21,997 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:36:21,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-07-13 20:36:22,001 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:22,022 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:36:22,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-13 20:36:22,023 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:22,033 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:36:22,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 22 [2021-07-13 20:36:22,034 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:22,044 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:36:22,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:36:22,045 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:22,064 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:36:22,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-13 20:36:22,068 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:22,085 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:36:22,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-13 20:36:22,087 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:22,097 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:36:22,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 16 [2021-07-13 20:36:22,097 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:22,107 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:36:22,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:36:22,108 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:22,117 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:36:22,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:36:22,118 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:22,134 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:22,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-13 20:36:22,136 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:22,151 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:22,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-13 20:36:22,152 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:22,158 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:36:22,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:36:22,159 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:22,268 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-07-13 20:36:22,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:22,281 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:36:22,281 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:737, output treesize:407 [2021-07-13 20:36:22,511 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-07-13 20:36:22,729 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-07-13 20:36:22,844 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:22,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954658374] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:22,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:36:22,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-07-13 20:36:22,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274311822] [2021-07-13 20:36:22,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:36:22,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:36:22,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:36:22,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:36:22,845 INFO L87 Difference]: Start difference. First operand 1570 states and 5260 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:23,498 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-07-13 20:36:23,865 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2021-07-13 20:36:24,038 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-07-13 20:36:24,576 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 65 [2021-07-13 20:36:25,335 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 34 [2021-07-13 20:36:25,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:36:25,404 INFO L93 Difference]: Finished difference Result 2168 states and 6948 transitions. [2021-07-13 20:36:25,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:36:25,405 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:36:25,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:36:25,409 INFO L225 Difference]: With dead ends: 2168 [2021-07-13 20:36:25,409 INFO L226 Difference]: Without dead ends: 2143 [2021-07-13 20:36:25,409 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 3064.4ms TimeCoverageRelationStatistics Valid=242, Invalid=1318, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:36:25,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2143 states. [2021-07-13 20:36:25,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2143 to 1584. [2021-07-13 20:36:25,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1584 states, 1583 states have (on average 3.360707517372078) internal successors, (5320), 1583 states have internal predecessors, (5320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:25,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1584 states to 1584 states and 5320 transitions. [2021-07-13 20:36:25,438 INFO L78 Accepts]: Start accepts. Automaton has 1584 states and 5320 transitions. Word has length 26 [2021-07-13 20:36:25,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:36:25,439 INFO L482 AbstractCegarLoop]: Abstraction has 1584 states and 5320 transitions. [2021-07-13 20:36:25,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:25,439 INFO L276 IsEmpty]: Start isEmpty. Operand 1584 states and 5320 transitions. [2021-07-13 20:36:25,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:36:25,449 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:36:25,449 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:36:25,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1022 [2021-07-13 20:36:25,665 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:36:25,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:36:25,665 INFO L82 PathProgramCache]: Analyzing trace with hash 2016041692, now seen corresponding path program 21 times [2021-07-13 20:36:25,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:36:25,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691637145] [2021-07-13 20:36:25,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:36:25,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:36:26,111 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:26,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:36:26,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691637145] [2021-07-13 20:36:26,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691637145] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:26,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315452889] [2021-07-13 20:36:26,112 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 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 [2021-07-13 20:36:26,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:36:26,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:36:26,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:36:26,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:36:26,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:26,484 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:36:26,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:36:26,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:26,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:26,495 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:36:26,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:36:26,497 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:26,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:26,505 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:36:26,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:36:26,506 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:26,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:26,516 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:26,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-13 20:36:26,518 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:26,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:26,528 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:36:26,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-13 20:36:26,530 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:26,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:26,539 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:36:26,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:36:26,539 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:26,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:26,551 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:26,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:36:26,553 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:26,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:26,562 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:36:26,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-07-13 20:36:26,563 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:26,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:26,571 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:36:26,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:36:26,572 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:26,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:26,581 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:36:26,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:36:26,582 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:26,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:26,592 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:26,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:36:26,596 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:26,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:26,607 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:36:26,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:36:26,608 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:26,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:26,620 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:26,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:36:26,621 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:26,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:26,631 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:26,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:36:26,635 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:26,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:26,644 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:36:26,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:36:26,644 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:26,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:26,650 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:36:26,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-07-13 20:36:26,651 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:26,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:26,742 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:36:26,742 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:657, output treesize:174 [2021-07-13 20:36:26,952 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:26,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315452889] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:26,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:36:26,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-07-13 20:36:26,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167923705] [2021-07-13 20:36:26,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:36:26,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:36:26,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:36:26,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:36:26,953 INFO L87 Difference]: Start difference. First operand 1584 states and 5320 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:27,815 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2021-07-13 20:36:28,307 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2021-07-13 20:36:28,562 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-07-13 20:36:28,887 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2021-07-13 20:36:28,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:36:28,944 INFO L93 Difference]: Finished difference Result 2090 states and 6847 transitions. [2021-07-13 20:36:28,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:36:28,944 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:36:28,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:36:28,948 INFO L225 Difference]: With dead ends: 2090 [2021-07-13 20:36:28,948 INFO L226 Difference]: Without dead ends: 2061 [2021-07-13 20:36:28,949 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 2290.4ms TimeCoverageRelationStatistics Valid=217, Invalid=905, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:36:28,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2061 states. [2021-07-13 20:36:28,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2061 to 1587. [2021-07-13 20:36:28,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1587 states, 1586 states have (on average 3.3612862547288778) internal successors, (5331), 1586 states have internal predecessors, (5331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:28,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1587 states to 1587 states and 5331 transitions. [2021-07-13 20:36:28,974 INFO L78 Accepts]: Start accepts. Automaton has 1587 states and 5331 transitions. Word has length 26 [2021-07-13 20:36:28,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:36:28,974 INFO L482 AbstractCegarLoop]: Abstraction has 1587 states and 5331 transitions. [2021-07-13 20:36:28,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:28,974 INFO L276 IsEmpty]: Start isEmpty. Operand 1587 states and 5331 transitions. [2021-07-13 20:36:28,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:36:28,976 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:36:28,976 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:36:29,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1071,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:36:29,191 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:36:29,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:36:29,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1960184130, now seen corresponding path program 22 times [2021-07-13 20:36:29,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:36:29,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176545070] [2021-07-13 20:36:29,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:36:29,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:36:29,515 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 44 [2021-07-13 20:36:29,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:29,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:36:29,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176545070] [2021-07-13 20:36:29,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176545070] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:29,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617860675] [2021-07-13 20:36:29,741 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 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 [2021-07-13 20:36:29,773 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:36:29,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:36:29,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:36:29,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:36:30,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:30,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:30,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:30,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:36:30,071 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:30,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:30,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:30,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:36:30,076 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:30,183 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 44 [2021-07-13 20:36:30,184 INFO L628 ElimStorePlain]: treesize reduction 121, result has 46.0 percent of original size [2021-07-13 20:36:30,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:30,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:36:30,188 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:30,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:30,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:30,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:30,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:36:30,231 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:30,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:30,267 INFO L518 ElimStorePlain]: Eliminatee v_prenex_113 vanished before elimination [2021-07-13 20:36:30,269 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:36:30,269 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:264, output treesize:51 [2021-07-13 20:36:30,325 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:30,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617860675] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:30,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:36:30,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:36:30,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254450933] [2021-07-13 20:36:30,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:36:30,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:36:30,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:36:30,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:36:30,327 INFO L87 Difference]: Start difference. First operand 1587 states and 5331 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:30,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:36:30,603 INFO L93 Difference]: Finished difference Result 1662 states and 5522 transitions. [2021-07-13 20:36:30,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:36:30,603 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:36:30,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:36:30,606 INFO L225 Difference]: With dead ends: 1662 [2021-07-13 20:36:30,606 INFO L226 Difference]: Without dead ends: 1647 [2021-07-13 20:36:30,606 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 734.4ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:36:30,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2021-07-13 20:36:30,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 1593. [2021-07-13 20:36:30,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1593 states, 1592 states have (on average 3.363065326633166) internal successors, (5354), 1592 states have internal predecessors, (5354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:30,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1593 states to 1593 states and 5354 transitions. [2021-07-13 20:36:30,626 INFO L78 Accepts]: Start accepts. Automaton has 1593 states and 5354 transitions. Word has length 26 [2021-07-13 20:36:30,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:36:30,627 INFO L482 AbstractCegarLoop]: Abstraction has 1593 states and 5354 transitions. [2021-07-13 20:36:30,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:30,627 INFO L276 IsEmpty]: Start isEmpty. Operand 1593 states and 5354 transitions. [2021-07-13 20:36:30,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:36:30,629 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:36:30,629 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:36:30,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1112,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:36:30,834 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:36:30,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:36:30,834 INFO L82 PathProgramCache]: Analyzing trace with hash -389358530, now seen corresponding path program 23 times [2021-07-13 20:36:30,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:36:30,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719828804] [2021-07-13 20:36:30,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:36:30,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:36:31,157 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:31,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:36:31,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719828804] [2021-07-13 20:36:31,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719828804] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:31,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482523386] [2021-07-13 20:36:31,158 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 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 [2021-07-13 20:36:31,183 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:36:31,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:36:31,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:36:31,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:36:31,549 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_115, v_prenex_117], 3=[A, v_prenex_119]} [2021-07-13 20:36:31,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:31,575 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:31,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:36:31,578 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:31,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:31,589 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:31,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:36:31,590 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:31,736 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-07-13 20:36:31,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:31,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:31,750 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:36:31,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:36:31,752 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:31,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:31,761 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:31,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-13 20:36:31,763 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:31,887 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-07-13 20:36:31,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:31,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:31,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:31,901 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-13 20:36:31,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 19 [2021-07-13 20:36:31,903 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:31,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:31,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:31,914 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:31,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-07-13 20:36:31,918 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:32,031 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-07-13 20:36:32,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:32,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:32,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:32,045 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:32,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-07-13 20:36:32,049 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:32,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:32,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:32,060 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-13 20:36:32,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 22 [2021-07-13 20:36:32,062 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:32,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:32,180 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:36:32,180 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:349, output treesize:194 [2021-07-13 20:36:32,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:32,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482523386] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:32,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:36:32,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:36:32,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567551504] [2021-07-13 20:36:32,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:36:32,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:36:32,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:36:32,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:36:32,376 INFO L87 Difference]: Start difference. First operand 1593 states and 5354 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:33,546 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2021-07-13 20:36:33,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:36:33,631 INFO L93 Difference]: Finished difference Result 2262 states and 7355 transitions. [2021-07-13 20:36:33,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:36:33,631 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:36:33,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:36:33,635 INFO L225 Difference]: With dead ends: 2262 [2021-07-13 20:36:33,635 INFO L226 Difference]: Without dead ends: 2212 [2021-07-13 20:36:33,635 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 1520.3ms TimeCoverageRelationStatistics Valid=217, Invalid=973, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:36:33,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2212 states. [2021-07-13 20:36:33,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2212 to 1600. [2021-07-13 20:36:33,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1599 states have (on average 3.367104440275172) internal successors, (5384), 1599 states have internal predecessors, (5384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:33,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 5384 transitions. [2021-07-13 20:36:33,659 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 5384 transitions. Word has length 26 [2021-07-13 20:36:33,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:36:33,659 INFO L482 AbstractCegarLoop]: Abstraction has 1600 states and 5384 transitions. [2021-07-13 20:36:33,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:33,659 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 5384 transitions. [2021-07-13 20:36:33,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:36:33,661 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:36:33,661 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:36:33,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1123 [2021-07-13 20:36:33,878 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:36:33,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:36:33,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1800748254, now seen corresponding path program 24 times [2021-07-13 20:36:33,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:36:33,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949447231] [2021-07-13 20:36:33,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:36:33,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:36:34,076 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 43 [2021-07-13 20:36:34,299 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-07-13 20:36:34,443 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:34,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:36:34,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949447231] [2021-07-13 20:36:34,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949447231] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:34,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051201714] [2021-07-13 20:36:34,444 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 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 [2021-07-13 20:36:34,480 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:36:34,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:36:34,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:36:34,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:36:34,864 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-07-13 20:36:35,058 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 55 [2021-07-13 20:36:35,120 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_129], 2=[A, v_prenex_128]} [2021-07-13 20:36:35,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:35,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:36:35,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:35,233 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-07-13 20:36:35,234 INFO L628 ElimStorePlain]: treesize reduction 54, result has 69.8 percent of original size [2021-07-13 20:36:35,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:35,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:35,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:36:35,238 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:35,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:35,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:35,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:35,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:35,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:36:35,288 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:35,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:35,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:35,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:36:35,293 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:35,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:35,358 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:36:35,358 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:193, output treesize:51 [2021-07-13 20:36:35,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:35,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051201714] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:35,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:36:35,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:36:35,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782231570] [2021-07-13 20:36:35,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:36:35,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:36:35,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:36:35,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:36:35,416 INFO L87 Difference]: Start difference. First operand 1600 states and 5384 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:36,279 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-07-13 20:36:36,652 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 76 [2021-07-13 20:36:36,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:36:36,753 INFO L93 Difference]: Finished difference Result 1991 states and 6587 transitions. [2021-07-13 20:36:36,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:36:36,753 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:36:36,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:36:36,757 INFO L225 Difference]: With dead ends: 1991 [2021-07-13 20:36:36,757 INFO L226 Difference]: Without dead ends: 1976 [2021-07-13 20:36:36,757 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 2033.9ms TimeCoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:36:36,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1976 states. [2021-07-13 20:36:36,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1976 to 1611. [2021-07-13 20:36:36,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1611 states, 1610 states have (on average 3.3670807453416147) internal successors, (5421), 1610 states have internal predecessors, (5421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:36,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1611 states to 1611 states and 5421 transitions. [2021-07-13 20:36:36,779 INFO L78 Accepts]: Start accepts. Automaton has 1611 states and 5421 transitions. Word has length 26 [2021-07-13 20:36:36,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:36:36,779 INFO L482 AbstractCegarLoop]: Abstraction has 1611 states and 5421 transitions. [2021-07-13 20:36:36,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:36,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1611 states and 5421 transitions. [2021-07-13 20:36:36,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:36:36,781 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:36:36,781 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:36:36,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1154 [2021-07-13 20:36:36,998 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:36:36,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:36:36,998 INFO L82 PathProgramCache]: Analyzing trace with hash 183215474, now seen corresponding path program 25 times [2021-07-13 20:36:36,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:36:36,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959842908] [2021-07-13 20:36:36,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:36:37,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:36:37,195 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 41 [2021-07-13 20:36:37,342 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 40 [2021-07-13 20:36:37,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:37,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:36:37,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959842908] [2021-07-13 20:36:37,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959842908] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:37,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12736521] [2021-07-13 20:36:37,558 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 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 [2021-07-13 20:36:37,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:36:37,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:36:37,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:36:37,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:37,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:37,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:37,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,829 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:36:37,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:36:37,830 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:37,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:37,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:37,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,843 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:37,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 27 [2021-07-13 20:36:37,846 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:37,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:37,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:37,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:37,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,861 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:36:37,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-07-13 20:36:37,862 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:37,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:37,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:37,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,873 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:36:37,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:36:37,874 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:37,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:37,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:37,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,885 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:36:37,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:36:37,886 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:37,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:37,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:37,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:37,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,901 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:37,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 24 [2021-07-13 20:36:37,903 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:37,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:37,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:37,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,914 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:36:37,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:36:37,915 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:37,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:37,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:37,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:37,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,929 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:37,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-07-13 20:36:37,933 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:37,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:37,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:37,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:37,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,945 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:36:37,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:36:37,946 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:37,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:37,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:37,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,960 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:37,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 24 [2021-07-13 20:36:37,964 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:37,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:37,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:37,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:37,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,975 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:36:37,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:36:37,976 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:37,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:37,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:37,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,988 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:36:37,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-07-13 20:36:37,989 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:37,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:37,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:37,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:37,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:38,002 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:36:38,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-07-13 20:36:38,004 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:38,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:38,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:38,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:38,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:38,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:38,015 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:36:38,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:36:38,016 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:38,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:38,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:38,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:38,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:38,029 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:38,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 27 [2021-07-13 20:36:38,030 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:38,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:38,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:38,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:38,039 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:36:38,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 20 [2021-07-13 20:36:38,041 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:38,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:38,120 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:36:38,120 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:729, output treesize:181 [2021-07-13 20:36:38,323 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:38,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12736521] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:38,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:36:38,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-13 20:36:38,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811609605] [2021-07-13 20:36:38,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:36:38,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:36:38,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:36:38,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:36:38,324 INFO L87 Difference]: Start difference. First operand 1611 states and 5421 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:38,956 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-07-13 20:36:39,151 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2021-07-13 20:36:39,591 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2021-07-13 20:36:39,752 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 49 [2021-07-13 20:36:39,949 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-07-13 20:36:40,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:36:40,050 INFO L93 Difference]: Finished difference Result 2102 states and 6930 transitions. [2021-07-13 20:36:40,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:36:40,050 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:36:40,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:36:40,054 INFO L225 Difference]: With dead ends: 2102 [2021-07-13 20:36:40,054 INFO L226 Difference]: Without dead ends: 2083 [2021-07-13 20:36:40,054 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 2110.3ms TimeCoverageRelationStatistics Valid=220, Invalid=970, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:36:40,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2083 states. [2021-07-13 20:36:40,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2083 to 1612. [2021-07-13 20:36:40,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1612 states, 1611 states have (on average 3.3699565487274983) internal successors, (5429), 1611 states have internal predecessors, (5429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:40,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1612 states to 1612 states and 5429 transitions. [2021-07-13 20:36:40,079 INFO L78 Accepts]: Start accepts. Automaton has 1612 states and 5429 transitions. Word has length 26 [2021-07-13 20:36:40,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:36:40,079 INFO L482 AbstractCegarLoop]: Abstraction has 1612 states and 5429 transitions. [2021-07-13 20:36:40,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:40,080 INFO L276 IsEmpty]: Start isEmpty. Operand 1612 states and 5429 transitions. [2021-07-13 20:36:40,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:36:40,082 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:36:40,082 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:36:40,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1163,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:36:40,298 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:36:40,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:36:40,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1506727430, now seen corresponding path program 26 times [2021-07-13 20:36:40,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:36:40,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328917450] [2021-07-13 20:36:40,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:36:40,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:36:40,638 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:40,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:36:40,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328917450] [2021-07-13 20:36:40,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328917450] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:40,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110895936] [2021-07-13 20:36:40,638 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 20:36:40,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:36:40,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:36:40,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:36:40,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:36:40,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:40,885 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:36:40,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:36:40,885 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:40,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:40,893 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:36:40,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:36:40,894 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:40,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:40,904 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:36:40,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:36:40,905 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:40,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:40,913 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:36:40,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:36:40,913 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:40,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:40,923 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:36:40,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:36:40,925 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:40,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:40,935 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:40,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:36:40,936 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:40,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:40,943 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:36:40,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:36:40,944 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:40,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:40,954 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:40,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-13 20:36:40,955 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:40,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:40,965 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:40,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:36:40,968 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:40,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:40,976 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:36:40,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-07-13 20:36:40,976 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:40,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:40,984 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:36:40,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-07-13 20:36:40,985 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:40,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:40,995 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:40,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:36:40,997 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:41,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:41,008 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:36:41,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-13 20:36:41,009 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:41,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:41,018 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:41,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:36:41,022 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:41,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:41,041 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:36:41,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:36:41,041 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:41,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:41,046 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:36:41,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:36:41,047 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:41,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:41,119 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:36:41,119 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-07-13 20:36:41,328 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:41,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110895936] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:41,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:36:41,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-13 20:36:41,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090850692] [2021-07-13 20:36:41,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:36:41,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:36:41,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:36:41,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:36:41,330 INFO L87 Difference]: Start difference. First operand 1612 states and 5429 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:41,912 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-07-13 20:36:42,587 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-07-13 20:36:42,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:36:42,642 INFO L93 Difference]: Finished difference Result 2116 states and 6975 transitions. [2021-07-13 20:36:42,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:36:42,642 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:36:42,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:36:42,646 INFO L225 Difference]: With dead ends: 2116 [2021-07-13 20:36:42,646 INFO L226 Difference]: Without dead ends: 2091 [2021-07-13 20:36:42,646 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1564.3ms TimeCoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:36:42,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2091 states. [2021-07-13 20:36:42,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2091 to 1618. [2021-07-13 20:36:42,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1618 states, 1617 states have (on average 3.368583797155226) internal successors, (5447), 1617 states have internal predecessors, (5447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:42,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1618 states to 1618 states and 5447 transitions. [2021-07-13 20:36:42,668 INFO L78 Accepts]: Start accepts. Automaton has 1618 states and 5447 transitions. Word has length 26 [2021-07-13 20:36:42,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:36:42,668 INFO L482 AbstractCegarLoop]: Abstraction has 1618 states and 5447 transitions. [2021-07-13 20:36:42,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:42,668 INFO L276 IsEmpty]: Start isEmpty. Operand 1618 states and 5447 transitions. [2021-07-13 20:36:42,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:36:42,670 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:36:42,671 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:36:42,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1188 [2021-07-13 20:36:42,887 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:36:42,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:36:42,887 INFO L82 PathProgramCache]: Analyzing trace with hash -132958662, now seen corresponding path program 42 times [2021-07-13 20:36:42,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:36:42,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291235623] [2021-07-13 20:36:42,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:36:42,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:36:43,406 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:43,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:36:43,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291235623] [2021-07-13 20:36:43,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291235623] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:43,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637603804] [2021-07-13 20:36:43,407 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 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 [2021-07-13 20:36:43,440 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:36:43,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:36:43,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:36:43,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:36:43,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:43,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:43,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:43,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:43,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:43,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:43,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-07-13 20:36:43,931 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:43,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:43,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:43,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:43,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:43,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:43,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:43,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-07-13 20:36:43,959 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:43,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:43,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:43,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:43,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:43,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:43,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:43,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2021-07-13 20:36:43,968 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:43,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:43,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:43,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:43,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:43,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:43,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:43,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-13 20:36:43,977 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:43,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:43,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:43,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:43,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:43,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:43,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:43,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-07-13 20:36:43,985 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:43,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:43,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:43,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:43,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:43,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:43,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:43,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 13 [2021-07-13 20:36:43,994 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:43,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:43,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:44,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:44,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:44,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:44,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:44,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-13 20:36:44,004 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:44,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:44,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:44,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:44,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:44,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:44,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:44,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-13 20:36:44,013 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:44,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:44,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:44,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:44,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:44,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:44,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:44,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-07-13 20:36:44,021 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:44,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:44,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:44,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:44,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:44,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:44,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:44,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2021-07-13 20:36:44,030 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:44,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:44,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:44,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:44,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:44,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:44,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:44,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-13 20:36:44,039 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:44,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:44,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:44,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:44,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:44,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:44,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:44,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-13 20:36:44,047 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:44,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:44,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:44,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:44,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:44,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:44,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:44,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 16 [2021-07-13 20:36:44,055 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:44,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:44,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:44,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:44,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:44,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:44,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:44,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 13 [2021-07-13 20:36:44,063 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:44,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:44,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:44,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:44,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:44,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:44,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:44,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-13 20:36:44,071 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:44,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:44,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:44,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:44,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:44,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-07-13 20:36:44,076 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:44,108 INFO L628 ElimStorePlain]: treesize reduction 38, result has 49.3 percent of original size [2021-07-13 20:36:44,109 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:36:44,109 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:27 [2021-07-13 20:36:44,139 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:44,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637603804] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:44,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:36:44,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-07-13 20:36:44,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354366970] [2021-07-13 20:36:44,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:36:44,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:36:44,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:36:44,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:36:44,140 INFO L87 Difference]: Start difference. First operand 1618 states and 5447 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:45,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:36:45,739 INFO L93 Difference]: Finished difference Result 2097 states and 6880 transitions. [2021-07-13 20:36:45,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:36:45,739 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:36:45,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:36:45,743 INFO L225 Difference]: With dead ends: 2097 [2021-07-13 20:36:45,743 INFO L226 Difference]: Without dead ends: 2071 [2021-07-13 20:36:45,743 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 1932.3ms TimeCoverageRelationStatistics Valid=340, Invalid=1552, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:36:45,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2071 states. [2021-07-13 20:36:45,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2071 to 1622. [2021-07-13 20:36:45,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 1621 states have (on average 3.366440468846391) internal successors, (5457), 1621 states have internal predecessors, (5457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:45,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 5457 transitions. [2021-07-13 20:36:45,789 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 5457 transitions. Word has length 26 [2021-07-13 20:36:45,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:36:45,789 INFO L482 AbstractCegarLoop]: Abstraction has 1622 states and 5457 transitions. [2021-07-13 20:36:45,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:45,789 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 5457 transitions. [2021-07-13 20:36:45,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:36:45,791 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:36:45,791 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:36:46,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1205 [2021-07-13 20:36:46,007 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:36:46,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:36:46,008 INFO L82 PathProgramCache]: Analyzing trace with hash 934915902, now seen corresponding path program 43 times [2021-07-13 20:36:46,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:36:46,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895131522] [2021-07-13 20:36:46,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:36:46,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:36:46,506 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 33 [2021-07-13 20:36:46,582 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:46,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:36:46,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895131522] [2021-07-13 20:36:46,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895131522] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:46,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863840865] [2021-07-13 20:36:46,582 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 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 [2021-07-13 20:36:46,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:36:46,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:36:46,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:36:46,892 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2021-07-13 20:36:46,941 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_132, v_prenex_134], 6=[A, v_prenex_130]} [2021-07-13 20:36:46,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:46,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:46,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:46,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-13 20:36:46,949 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:46,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:46,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:46,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:36:46,956 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:47,066 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2021-07-13 20:36:47,066 INFO L628 ElimStorePlain]: treesize reduction 180, result has 40.2 percent of original size [2021-07-13 20:36:47,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:47,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-07-13 20:36:47,072 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:47,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:47,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:47,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:47,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:47,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:47,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-13 20:36:47,113 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:47,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:47,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:47,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:47,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-13 20:36:47,148 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:47,174 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:47,176 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 20:36:47,177 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:341, output treesize:43 [2021-07-13 20:36:47,223 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:47,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863840865] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:47,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:36:47,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-13 20:36:47,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311366909] [2021-07-13 20:36:47,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:36:47,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:36:47,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:36:47,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:36:47,224 INFO L87 Difference]: Start difference. First operand 1622 states and 5457 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:48,914 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-07-13 20:36:49,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:36:49,044 INFO L93 Difference]: Finished difference Result 2270 states and 7447 transitions. [2021-07-13 20:36:49,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:36:49,044 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:36:49,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:36:49,048 INFO L225 Difference]: With dead ends: 2270 [2021-07-13 20:36:49,048 INFO L226 Difference]: Without dead ends: 2255 [2021-07-13 20:36:49,049 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 2203.5ms TimeCoverageRelationStatistics Valid=391, Invalid=1589, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:36:49,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2255 states. [2021-07-13 20:36:49,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2255 to 1622. [2021-07-13 20:36:49,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 1621 states have (on average 3.366440468846391) internal successors, (5457), 1621 states have internal predecessors, (5457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:49,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 5457 transitions. [2021-07-13 20:36:49,073 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 5457 transitions. Word has length 26 [2021-07-13 20:36:49,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:36:49,073 INFO L482 AbstractCegarLoop]: Abstraction has 1622 states and 5457 transitions. [2021-07-13 20:36:49,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:49,073 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 5457 transitions. [2021-07-13 20:36:49,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:36:49,075 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:36:49,075 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:36:49,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1319,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:36:49,291 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:36:49,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:36:49,291 INFO L82 PathProgramCache]: Analyzing trace with hash 346540478, now seen corresponding path program 27 times [2021-07-13 20:36:49,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:36:49,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71362016] [2021-07-13 20:36:49,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:36:49,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:36:49,512 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2021-07-13 20:36:49,760 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-07-13 20:36:49,874 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2021-07-13 20:36:49,991 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:49,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:36:49,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71362016] [2021-07-13 20:36:49,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71362016] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:49,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268131118] [2021-07-13 20:36:49,991 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 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 [2021-07-13 20:36:50,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:36:50,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:36:50,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:36:50,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:36:50,273 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-07-13 20:36:50,441 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-07-13 20:36:50,733 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 56 [2021-07-13 20:36:50,795 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_143, v_prenex_145], 6=[A, v_prenex_147]} [2021-07-13 20:36:50,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:50,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:50,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:50,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:36:50,804 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:50,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:50,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:50,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:36:50,810 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:50,978 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 63 [2021-07-13 20:36:50,979 INFO L628 ElimStorePlain]: treesize reduction 147, result has 51.5 percent of original size [2021-07-13 20:36:50,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:50,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:50,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:50,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:36:50,986 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:50,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:50,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:50,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:36:50,992 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:51,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:51,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:51,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:36:51,068 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:51,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:51,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:51,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 20:36:51,124 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:51,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:51,174 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:36:51,174 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 12 variables, input treesize:341, output treesize:61 [2021-07-13 20:36:51,231 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:51,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268131118] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:51,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:36:51,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:36:51,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121623121] [2021-07-13 20:36:51,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:36:51,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:36:51,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:36:51,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:36:51,232 INFO L87 Difference]: Start difference. First operand 1622 states and 5457 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:51,658 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-07-13 20:36:51,967 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-07-13 20:36:52,129 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 47 [2021-07-13 20:36:52,595 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 69 [2021-07-13 20:36:53,209 WARN L205 SmtUtils]: Spent 584.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 77 [2021-07-13 20:36:53,729 WARN L205 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 89 [2021-07-13 20:36:54,395 WARN L205 SmtUtils]: Spent 611.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 87 [2021-07-13 20:36:54,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:36:54,505 INFO L93 Difference]: Finished difference Result 2122 states and 6912 transitions. [2021-07-13 20:36:54,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:36:54,505 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:36:54,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:36:54,509 INFO L225 Difference]: With dead ends: 2122 [2021-07-13 20:36:54,509 INFO L226 Difference]: Without dead ends: 2107 [2021-07-13 20:36:54,509 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 4012.4ms TimeCoverageRelationStatistics Valid=220, Invalid=710, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:36:54,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2107 states. [2021-07-13 20:36:54,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2107 to 1633. [2021-07-13 20:36:54,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1633 states, 1632 states have (on average 3.3670343137254903) internal successors, (5495), 1632 states have internal predecessors, (5495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:54,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1633 states to 1633 states and 5495 transitions. [2021-07-13 20:36:54,532 INFO L78 Accepts]: Start accepts. Automaton has 1633 states and 5495 transitions. Word has length 26 [2021-07-13 20:36:54,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:36:54,532 INFO L482 AbstractCegarLoop]: Abstraction has 1633 states and 5495 transitions. [2021-07-13 20:36:54,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:54,532 INFO L276 IsEmpty]: Start isEmpty. Operand 1633 states and 5495 transitions. [2021-07-13 20:36:54,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:36:54,535 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:36:54,535 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:36:54,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1333 [2021-07-13 20:36:54,751 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:36:54,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:36:54,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1896922042, now seen corresponding path program 44 times [2021-07-13 20:36:54,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:36:54,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119748939] [2021-07-13 20:36:54,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:36:54,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:36:55,285 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:55,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:36:55,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119748939] [2021-07-13 20:36:55,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119748939] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:55,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939125487] [2021-07-13 20:36:55,286 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 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 [2021-07-13 20:36:55,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:36:55,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:36:55,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:36:55,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:36:55,692 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2021-07-13 20:36:56,034 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_158], 6=[v_prenex_160, v_prenex_162]} [2021-07-13 20:36:56,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:56,059 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-13 20:36:56,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 27 [2021-07-13 20:36:56,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:56,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:56,087 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-13 20:36:56,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 30 [2021-07-13 20:36:56,088 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:56,280 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-07-13 20:36:56,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:56,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:56,303 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-07-13 20:36:56,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 23 [2021-07-13 20:36:56,304 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:56,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:56,321 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:56,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 28 [2021-07-13 20:36:56,326 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:56,504 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-07-13 20:36:56,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:56,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:56,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:56,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:56,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:56,527 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:56,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-07-13 20:36:56,532 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:56,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:56,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:56,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:56,552 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-07-13 20:36:56,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 26 [2021-07-13 20:36:56,553 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:56,710 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-07-13 20:36:56,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:56,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:56,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:56,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:56,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:56,737 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-13 20:36:56,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 30 [2021-07-13 20:36:56,738 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:56,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:56,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:56,758 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-13 20:36:56,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 30 [2021-07-13 20:36:56,761 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:56,897 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-07-13 20:36:56,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:56,913 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:36:56,913 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:433, output treesize:343 [2021-07-13 20:36:57,074 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:57,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939125487] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:57,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:36:57,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:36:57,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100488386] [2021-07-13 20:36:57,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:36:57,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:36:57,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:36:57,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:36:57,075 INFO L87 Difference]: Start difference. First operand 1633 states and 5495 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:57,758 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 46 [2021-07-13 20:36:59,326 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 49 [2021-07-13 20:36:59,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:36:59,944 INFO L93 Difference]: Finished difference Result 2550 states and 8113 transitions. [2021-07-13 20:36:59,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:36:59,945 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:36:59,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:36:59,949 INFO L225 Difference]: With dead ends: 2550 [2021-07-13 20:36:59,949 INFO L226 Difference]: Without dead ends: 2506 [2021-07-13 20:36:59,949 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 906 ImplicationChecksByTransitivity, 3256.3ms TimeCoverageRelationStatistics Valid=511, Invalid=2459, Unknown=0, NotChecked=0, Total=2970 [2021-07-13 20:36:59,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2506 states. [2021-07-13 20:36:59,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2506 to 1640. [2021-07-13 20:36:59,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1640 states, 1639 states have (on average 3.36790726052471) internal successors, (5520), 1639 states have internal predecessors, (5520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:59,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 5520 transitions. [2021-07-13 20:36:59,974 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 5520 transitions. Word has length 26 [2021-07-13 20:36:59,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:36:59,974 INFO L482 AbstractCegarLoop]: Abstraction has 1640 states and 5520 transitions. [2021-07-13 20:36:59,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:59,974 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 5520 transitions. [2021-07-13 20:36:59,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:36:59,976 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:36:59,976 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:00,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1349,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:00,193 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:00,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:00,193 INFO L82 PathProgramCache]: Analyzing trace with hash 920603198, now seen corresponding path program 45 times [2021-07-13 20:37:00,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:00,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176436170] [2021-07-13 20:37:00,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:00,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:00,643 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:00,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:00,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176436170] [2021-07-13 20:37:00,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176436170] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:00,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022432460] [2021-07-13 20:37:00,643 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 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 [2021-07-13 20:37:00,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:37:00,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:00,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:37:00,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:01,004 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-07-13 20:37:01,239 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-07-13 20:37:01,531 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-07-13 20:37:01,906 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-07-13 20:37:01,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 59 [2021-07-13 20:37:01,914 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:01,967 INFO L354 Elim1Store]: treesize reduction 29, result has 40.8 percent of original size [2021-07-13 20:37:01,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 38 [2021-07-13 20:37:01,969 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:03,076 WARN L205 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 175 DAG size of output: 169 [2021-07-13 20:37:03,077 INFO L628 ElimStorePlain]: treesize reduction 23, result has 97.5 percent of original size [2021-07-13 20:37:03,146 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-07-13 20:37:03,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 51 [2021-07-13 20:37:03,149 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:03,203 INFO L354 Elim1Store]: treesize reduction 20, result has 59.2 percent of original size [2021-07-13 20:37:03,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 44 [2021-07-13 20:37:03,207 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:03,749 WARN L205 SmtUtils]: Spent 541.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2021-07-13 20:37:03,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:03,806 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:03,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 67 [2021-07-13 20:37:03,829 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:03,886 INFO L354 Elim1Store]: treesize reduction 24, result has 51.0 percent of original size [2021-07-13 20:37:03,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2021-07-13 20:37:03,891 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:05,580 WARN L205 SmtUtils]: Spent 1.69 s on a formula simplification. DAG size of input: 185 DAG size of output: 168 [2021-07-13 20:37:05,580 INFO L628 ElimStorePlain]: treesize reduction 92, result has 90.6 percent of original size [2021-07-13 20:37:05,654 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-07-13 20:37:05,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 59 [2021-07-13 20:37:05,664 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:05,733 INFO L354 Elim1Store]: treesize reduction 4, result has 91.8 percent of original size [2021-07-13 20:37:05,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 63 [2021-07-13 20:37:05,746 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:06,875 WARN L205 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 181 DAG size of output: 172 [2021-07-13 20:37:06,875 INFO L628 ElimStorePlain]: treesize reduction 83, result has 91.5 percent of original size [2021-07-13 20:37:06,940 INFO L354 Elim1Store]: treesize reduction 12, result has 75.5 percent of original size [2021-07-13 20:37:06,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 52 [2021-07-13 20:37:06,948 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:06,991 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:06,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 61 [2021-07-13 20:37:07,025 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:07,549 WARN L205 SmtUtils]: Spent 523.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2021-07-13 20:37:07,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:07,619 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-07-13 20:37:07,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 59 [2021-07-13 20:37:07,628 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:07,686 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-07-13 20:37:07,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 56 [2021-07-13 20:37:07,705 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:08,698 WARN L205 SmtUtils]: Spent 992.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 152 [2021-07-13 20:37:08,698 INFO L628 ElimStorePlain]: treesize reduction 37, result has 95.8 percent of original size [2021-07-13 20:37:08,763 INFO L354 Elim1Store]: treesize reduction 12, result has 75.5 percent of original size [2021-07-13 20:37:08,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 52 [2021-07-13 20:37:08,772 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:08,825 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-07-13 20:37:08,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 51 [2021-07-13 20:37:08,829 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:09,334 WARN L205 SmtUtils]: Spent 504.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2021-07-13 20:37:09,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:09,386 INFO L354 Elim1Store]: treesize reduction 20, result has 59.2 percent of original size [2021-07-13 20:37:09,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 44 [2021-07-13 20:37:09,390 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:09,445 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-07-13 20:37:09,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 56 [2021-07-13 20:37:09,463 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:10,339 WARN L205 SmtUtils]: Spent 874.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 136 [2021-07-13 20:37:10,339 INFO L628 ElimStorePlain]: treesize reduction 68, result has 91.9 percent of original size [2021-07-13 20:37:10,440 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 8 dim-1 vars, End of recursive call: and 15 xjuncts. [2021-07-13 20:37:10,441 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 17 variables, input treesize:913, output treesize:2294 [2021-07-13 20:37:11,153 WARN L205 SmtUtils]: Spent 584.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 69 [2021-07-13 20:37:11,331 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-07-13 20:37:11,361 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:11,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022432460] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:11,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:11,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-13 20:37:11,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253708579] [2021-07-13 20:37:11,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:37:11,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:11,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:37:11,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:37:11,362 INFO L87 Difference]: Start difference. First operand 1640 states and 5520 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:14,023 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2021-07-13 20:37:14,453 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-07-13 20:37:15,205 WARN L205 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 89 [2021-07-13 20:37:15,621 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 69 [2021-07-13 20:37:15,993 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2021-07-13 20:37:16,163 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 33 [2021-07-13 20:37:16,800 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 90 [2021-07-13 20:37:17,311 WARN L205 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 92 [2021-07-13 20:37:18,211 WARN L205 SmtUtils]: Spent 612.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 96 [2021-07-13 20:37:18,580 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2021-07-13 20:37:18,806 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 47 [2021-07-13 20:37:18,946 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 30 [2021-07-13 20:37:19,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:19,069 INFO L93 Difference]: Finished difference Result 3086 states and 9767 transitions. [2021-07-13 20:37:19,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-13 20:37:19,069 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:37:19,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:19,074 INFO L225 Difference]: With dead ends: 3086 [2021-07-13 20:37:19,075 INFO L226 Difference]: Without dead ends: 3056 [2021-07-13 20:37:19,079 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1424 ImplicationChecksByTransitivity, 8244.2ms TimeCoverageRelationStatistics Valid=696, Invalid=4134, Unknown=0, NotChecked=0, Total=4830 [2021-07-13 20:37:19,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3056 states. [2021-07-13 20:37:19,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3056 to 1671. [2021-07-13 20:37:19,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1671 states, 1670 states have (on average 3.3748502994011975) internal successors, (5636), 1670 states have internal predecessors, (5636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:19,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1671 states to 1671 states and 5636 transitions. [2021-07-13 20:37:19,137 INFO L78 Accepts]: Start accepts. Automaton has 1671 states and 5636 transitions. Word has length 26 [2021-07-13 20:37:19,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:19,137 INFO L482 AbstractCegarLoop]: Abstraction has 1671 states and 5636 transitions. [2021-07-13 20:37:19,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:19,137 INFO L276 IsEmpty]: Start isEmpty. Operand 1671 states and 5636 transitions. [2021-07-13 20:37:19,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:37:19,140 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:19,140 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:19,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1419,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:19,353 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:19,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:19,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1936410854, now seen corresponding path program 28 times [2021-07-13 20:37:19,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:19,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228871883] [2021-07-13 20:37:19,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:19,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:19,591 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2021-07-13 20:37:19,822 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-07-13 20:37:20,046 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:20,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:20,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228871883] [2021-07-13 20:37:20,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228871883] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:20,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449323554] [2021-07-13 20:37:20,047 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 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 [2021-07-13 20:37:20,072 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:37:20,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:20,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:37:20,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:20,395 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-07-13 20:37:20,640 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 55 [2021-07-13 20:37:20,707 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_185], 2=[v_prenex_186, v_prenex_187], 3=[A]} [2021-07-13 20:37:20,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:20,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:37:20,713 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:20,840 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-07-13 20:37:20,840 INFO L628 ElimStorePlain]: treesize reduction 94, result has 60.3 percent of original size [2021-07-13 20:37:20,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:20,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:20,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:20,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:37:20,847 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:20,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:20,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:20,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:37:20,852 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:20,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:20,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:20,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:20,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:37:20,901 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:20,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:20,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:20,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 20:37:20,945 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:20,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:20,983 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:37:20,983 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:251, output treesize:56 [2021-07-13 20:37:21,038 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:21,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449323554] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:21,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:21,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:37:21,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54569533] [2021-07-13 20:37:21,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:37:21,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:21,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:37:21,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:37:21,039 INFO L87 Difference]: Start difference. First operand 1671 states and 5636 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:21,405 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2021-07-13 20:37:21,642 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2021-07-13 20:37:22,435 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-07-13 20:37:22,576 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-07-13 20:37:22,796 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 71 [2021-07-13 20:37:23,039 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 62 [2021-07-13 20:37:23,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:23,164 INFO L93 Difference]: Finished difference Result 2244 states and 7296 transitions. [2021-07-13 20:37:23,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:37:23,164 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:37:23,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:23,168 INFO L225 Difference]: With dead ends: 2244 [2021-07-13 20:37:23,168 INFO L226 Difference]: Without dead ends: 2229 [2021-07-13 20:37:23,168 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 2810.2ms TimeCoverageRelationStatistics Valid=237, Invalid=819, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:37:23,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2229 states. [2021-07-13 20:37:23,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2229 to 1676. [2021-07-13 20:37:23,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1676 states, 1675 states have (on average 3.3761194029850747) internal successors, (5655), 1675 states have internal predecessors, (5655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:23,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 5655 transitions. [2021-07-13 20:37:23,193 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 5655 transitions. Word has length 26 [2021-07-13 20:37:23,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:23,193 INFO L482 AbstractCegarLoop]: Abstraction has 1676 states and 5655 transitions. [2021-07-13 20:37:23,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:23,193 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 5655 transitions. [2021-07-13 20:37:23,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:37:23,196 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:23,196 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:23,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1636,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:23,412 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:23,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:23,412 INFO L82 PathProgramCache]: Analyzing trace with hash 318878074, now seen corresponding path program 29 times [2021-07-13 20:37:23,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:23,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21266902] [2021-07-13 20:37:23,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:23,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:23,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:23,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:23,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21266902] [2021-07-13 20:37:23,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21266902] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:23,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967623627] [2021-07-13 20:37:23,830 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 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 [2021-07-13 20:37:23,888 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:37:23,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:23,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:37:23,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:24,266 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-07-13 20:37:24,460 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-07-13 20:37:24,518 INFO L446 ElimStorePlain]: Different costs {2=[A, v_prenex_195, v_prenex_197, v_prenex_199, v_prenex_200, v_prenex_201], 3=[v_prenex_196, v_prenex_198]} [2021-07-13 20:37:24,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:24,531 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:37:24,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-13 20:37:24,532 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:24,640 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-07-13 20:37:24,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:24,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:24,652 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:24,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:37:24,654 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:24,763 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-07-13 20:37:24,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:24,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:24,775 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:24,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-13 20:37:24,777 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:24,892 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-07-13 20:37:24,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:24,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:24,905 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:24,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:37:24,909 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:25,023 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-07-13 20:37:25,023 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:25,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:25,035 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:25,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:37:25,036 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:25,144 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-07-13 20:37:25,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:25,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:25,156 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:37:25,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:37:25,158 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:25,262 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-07-13 20:37:25,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:25,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:25,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:25,303 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-13 20:37:25,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2021-07-13 20:37:25,305 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:25,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:25,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:25,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:25,414 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:25,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-07-13 20:37:25,417 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:25,509 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:25,515 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:37:25,515 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:317, output treesize:184 [2021-07-13 20:37:25,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:25,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967623627] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:25,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:25,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:37:25,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200803469] [2021-07-13 20:37:25,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:37:25,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:25,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:37:25,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:37:25,706 INFO L87 Difference]: Start difference. First operand 1676 states and 5655 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:26,048 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-07-13 20:37:27,045 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 41 [2021-07-13 20:37:27,579 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 72 [2021-07-13 20:37:28,005 WARN L205 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 106 [2021-07-13 20:37:28,446 WARN L205 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 89 [2021-07-13 20:37:28,945 WARN L205 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 110 [2021-07-13 20:37:29,441 WARN L205 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 93 [2021-07-13 20:37:29,695 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-07-13 20:37:30,028 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 42 [2021-07-13 20:37:30,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:30,199 INFO L93 Difference]: Finished difference Result 2686 states and 8637 transitions. [2021-07-13 20:37:30,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:37:30,200 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:37:30,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:30,204 INFO L225 Difference]: With dead ends: 2686 [2021-07-13 20:37:30,204 INFO L226 Difference]: Without dead ends: 2652 [2021-07-13 20:37:30,204 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 4667.0ms TimeCoverageRelationStatistics Valid=371, Invalid=1435, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:37:30,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2652 states. [2021-07-13 20:37:30,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2652 to 1683. [2021-07-13 20:37:30,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1683 states, 1682 states have (on average 3.381688466111772) internal successors, (5688), 1682 states have internal predecessors, (5688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:30,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1683 states to 1683 states and 5688 transitions. [2021-07-13 20:37:30,231 INFO L78 Accepts]: Start accepts. Automaton has 1683 states and 5688 transitions. Word has length 26 [2021-07-13 20:37:30,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:30,231 INFO L482 AbstractCegarLoop]: Abstraction has 1683 states and 5688 transitions. [2021-07-13 20:37:30,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:30,231 INFO L276 IsEmpty]: Start isEmpty. Operand 1683 states and 5688 transitions. [2021-07-13 20:37:30,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:37:30,233 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:30,233 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:30,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1647 [2021-07-13 20:37:30,450 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:30,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:30,450 INFO L82 PathProgramCache]: Analyzing trace with hash 2122915566, now seen corresponding path program 46 times [2021-07-13 20:37:30,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:30,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349518075] [2021-07-13 20:37:30,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:30,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:30,790 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:30,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:30,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349518075] [2021-07-13 20:37:30,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349518075] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:30,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786976136] [2021-07-13 20:37:30,791 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 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 [2021-07-13 20:37:30,817 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:37:30,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:30,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:37:30,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:31,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:31,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:31,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:31,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:31,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:31,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:31,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-07-13 20:37:31,342 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:31,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:31,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:31,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:31,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:31,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:31,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:31,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 16 [2021-07-13 20:37:31,351 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:31,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:31,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:31,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:31,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:31,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:31,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:31,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-13 20:37:31,360 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:31,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:31,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:31,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:31,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:31,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:31,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:31,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:37:31,369 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:31,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:31,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:31,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:31,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:31,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:31,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:31,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 16 [2021-07-13 20:37:31,378 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:31,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:31,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:31,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:31,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:31,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:31,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:31,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-13 20:37:31,387 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:31,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:31,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:31,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:31,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:31,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:31,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:31,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-13 20:37:31,397 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:31,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:31,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:31,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:31,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:31,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:31,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:31,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-07-13 20:37:31,406 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:31,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:31,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:31,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:31,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:31,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:31,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:31,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-13 20:37:31,442 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:31,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:31,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:31,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:31,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:31,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:31,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:31,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:37:31,450 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:31,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:31,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:31,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:31,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:31,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:31,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:31,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-13 20:37:31,459 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:31,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:31,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:31,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:31,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:31,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:31,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:31,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-13 20:37:31,468 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:31,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:31,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:31,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:31,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:31,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:31,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:31,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 19 [2021-07-13 20:37:31,476 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:31,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:31,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:31,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:31,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:31,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:31,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:31,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2021-07-13 20:37:31,485 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:31,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:31,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:31,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:31,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:31,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:31,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:31,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-07-13 20:37:31,493 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:31,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:31,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:31,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:31,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:31,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-13 20:37:31,499 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:31,554 INFO L628 ElimStorePlain]: treesize reduction 237, result has 13.5 percent of original size [2021-07-13 20:37:31,555 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:37:31,555 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:31 [2021-07-13 20:37:31,593 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:31,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786976136] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:31,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:31,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-07-13 20:37:31,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822003111] [2021-07-13 20:37:31,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:37:31,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:31,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:37:31,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:37:31,594 INFO L87 Difference]: Start difference. First operand 1683 states and 5688 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:32,288 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 38 [2021-07-13 20:37:33,007 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2021-07-13 20:37:33,473 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2021-07-13 20:37:33,683 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2021-07-13 20:37:33,803 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2021-07-13 20:37:34,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:34,394 INFO L93 Difference]: Finished difference Result 3384 states and 10825 transitions. [2021-07-13 20:37:34,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:37:34,394 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:37:34,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:34,400 INFO L225 Difference]: With dead ends: 3384 [2021-07-13 20:37:34,400 INFO L226 Difference]: Without dead ends: 3348 [2021-07-13 20:37:34,400 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 2804.1ms TimeCoverageRelationStatistics Valid=538, Invalid=2432, Unknown=0, NotChecked=0, Total=2970 [2021-07-13 20:37:34,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3348 states. [2021-07-13 20:37:34,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3348 to 1796. [2021-07-13 20:37:34,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1796 states, 1795 states have (on average 3.403899721448468) internal successors, (6110), 1795 states have internal predecessors, (6110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:34,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1796 states to 1796 states and 6110 transitions. [2021-07-13 20:37:34,435 INFO L78 Accepts]: Start accepts. Automaton has 1796 states and 6110 transitions. Word has length 26 [2021-07-13 20:37:34,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:34,435 INFO L482 AbstractCegarLoop]: Abstraction has 1796 states and 6110 transitions. [2021-07-13 20:37:34,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:34,435 INFO L276 IsEmpty]: Start isEmpty. Operand 1796 states and 6110 transitions. [2021-07-13 20:37:34,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:37:34,437 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:34,438 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:34,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1664,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:34,642 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:34,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:34,643 INFO L82 PathProgramCache]: Analyzing trace with hash -338403078, now seen corresponding path program 47 times [2021-07-13 20:37:34,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:34,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731190738] [2021-07-13 20:37:34,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:34,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:35,052 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:35,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:35,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731190738] [2021-07-13 20:37:35,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731190738] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:35,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563876351] [2021-07-13 20:37:35,052 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 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 [2021-07-13 20:37:35,132 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:37:35,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:35,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:37:35,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:35,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:35,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:35,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:35,626 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-07-13 20:37:35,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 37 [2021-07-13 20:37:35,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:35,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:35,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:35,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:35,664 INFO L354 Elim1Store]: treesize reduction 4, result has 87.9 percent of original size [2021-07-13 20:37:35,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 47 [2021-07-13 20:37:35,668 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:35,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:35,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:35,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:35,698 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-07-13 20:37:35,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 34 [2021-07-13 20:37:35,702 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:35,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:35,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:35,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:35,730 INFO L354 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2021-07-13 20:37:35,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 30 [2021-07-13 20:37:35,733 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:35,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:35,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:35,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:35,761 INFO L354 Elim1Store]: treesize reduction 23, result has 30.3 percent of original size [2021-07-13 20:37:35,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 28 [2021-07-13 20:37:35,762 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:35,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:35,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:35,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:35,780 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:37:35,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-07-13 20:37:35,781 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:35,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:35,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:35,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:35,808 INFO L354 Elim1Store]: treesize reduction 23, result has 30.3 percent of original size [2021-07-13 20:37:35,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 28 [2021-07-13 20:37:35,809 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:35,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:35,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:35,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:35,828 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:37:35,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-07-13 20:37:35,829 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:35,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:35,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:35,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:35,846 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:37:35,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-07-13 20:37:35,847 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:35,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:35,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:35,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:35,865 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:37:35,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-07-13 20:37:35,866 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:35,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:35,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:35,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:35,892 INFO L354 Elim1Store]: treesize reduction 23, result has 30.3 percent of original size [2021-07-13 20:37:35,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 25 [2021-07-13 20:37:35,894 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:35,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:35,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:35,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:35,912 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:37:35,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 1 [2021-07-13 20:37:35,913 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:35,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:35,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:35,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:35,929 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:37:35,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-07-13 20:37:35,930 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:35,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:35,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:35,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:35,947 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:37:35,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-07-13 20:37:35,948 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:35,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:35,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:35,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:35,972 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:35,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 45 [2021-07-13 20:37:35,978 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:35,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:35,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:35,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:35,988 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:37:35,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-07-13 20:37:35,989 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:36,161 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2021-07-13 20:37:36,162 INFO L628 ElimStorePlain]: treesize reduction 116, result has 51.7 percent of original size [2021-07-13 20:37:36,164 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:37:36,164 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:841, output treesize:133 [2021-07-13 20:37:36,303 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:36,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563876351] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:36,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:36,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-07-13 20:37:36,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661646826] [2021-07-13 20:37:36,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:37:36,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:36,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:37:36,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:37:36,304 INFO L87 Difference]: Start difference. First operand 1796 states and 6110 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:37,664 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 47 [2021-07-13 20:37:38,186 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2021-07-13 20:37:38,432 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 59 [2021-07-13 20:37:38,661 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-07-13 20:37:39,201 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 39 [2021-07-13 20:37:39,469 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-07-13 20:37:39,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:39,742 INFO L93 Difference]: Finished difference Result 3832 states and 12118 transitions. [2021-07-13 20:37:39,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:37:39,743 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:37:39,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:39,749 INFO L225 Difference]: With dead ends: 3832 [2021-07-13 20:37:39,750 INFO L226 Difference]: Without dead ends: 3775 [2021-07-13 20:37:39,750 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 3387.2ms TimeCoverageRelationStatistics Valid=649, Invalid=2657, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:37:39,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3775 states. [2021-07-13 20:37:39,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3775 to 1819. [2021-07-13 20:37:39,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1819 states, 1818 states have (on average 3.407590759075908) internal successors, (6195), 1818 states have internal predecessors, (6195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:39,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1819 states to 1819 states and 6195 transitions. [2021-07-13 20:37:39,789 INFO L78 Accepts]: Start accepts. Automaton has 1819 states and 6195 transitions. Word has length 26 [2021-07-13 20:37:39,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:39,789 INFO L482 AbstractCegarLoop]: Abstraction has 1819 states and 6195 transitions. [2021-07-13 20:37:39,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:39,789 INFO L276 IsEmpty]: Start isEmpty. Operand 1819 states and 6195 transitions. [2021-07-13 20:37:39,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:37:39,791 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:39,791 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:40,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1770 [2021-07-13 20:37:40,009 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:40,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:40,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1512099618, now seen corresponding path program 30 times [2021-07-13 20:37:40,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:40,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712195583] [2021-07-13 20:37:40,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:40,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:40,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:40,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:40,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712195583] [2021-07-13 20:37:40,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712195583] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:40,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364683111] [2021-07-13 20:37:40,546 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 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 [2021-07-13 20:37:40,573 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:37:40,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:40,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:37:40,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:41,001 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-07-13 20:37:41,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:41,456 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:41,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-13 20:37:41,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:41,600 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2021-07-13 20:37:41,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:41,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:41,621 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:37:41,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:37:41,623 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:41,758 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2021-07-13 20:37:41,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:41,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:41,782 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:37:41,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-13 20:37:41,785 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:41,936 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-07-13 20:37:41,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:41,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:41,962 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:37:41,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-07-13 20:37:41,967 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:42,137 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2021-07-13 20:37:42,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:42,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:42,161 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:37:42,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-13 20:37:42,163 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:42,309 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-13 20:37:42,310 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:42,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:42,330 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:37:42,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-13 20:37:42,332 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:42,472 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-07-13 20:37:42,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:42,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:42,492 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:42,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-13 20:37:42,493 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:42,639 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2021-07-13 20:37:42,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:42,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:42,658 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:42,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-13 20:37:42,663 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:42,804 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-07-13 20:37:42,804 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:42,826 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:37:42,826 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 24 variables, input treesize:373, output treesize:497 [2021-07-13 20:37:43,159 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2021-07-13 20:37:43,439 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2021-07-13 20:37:43,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:43,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364683111] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:43,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:43,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:37:43,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471473027] [2021-07-13 20:37:43,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:37:43,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:43,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:37:43,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:37:43,562 INFO L87 Difference]: Start difference. First operand 1819 states and 6195 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:43,833 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 28 [2021-07-13 20:37:44,057 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-07-13 20:37:44,668 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2021-07-13 20:37:44,859 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 49 [2021-07-13 20:37:45,213 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 58 [2021-07-13 20:37:45,546 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2021-07-13 20:37:46,161 WARN L205 SmtUtils]: Spent 526.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 86 [2021-07-13 20:37:46,662 WARN L205 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 61 [2021-07-13 20:37:47,073 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 60 [2021-07-13 20:37:47,351 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2021-07-13 20:37:47,935 WARN L205 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 83 [2021-07-13 20:37:48,180 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-07-13 20:37:48,428 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2021-07-13 20:37:48,956 WARN L205 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 74 [2021-07-13 20:37:49,610 WARN L205 SmtUtils]: Spent 538.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 120 [2021-07-13 20:37:50,086 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 133 [2021-07-13 20:37:50,979 WARN L205 SmtUtils]: Spent 670.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 140 [2021-07-13 20:37:51,405 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 99 [2021-07-13 20:37:51,844 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 42 [2021-07-13 20:37:52,255 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 44 [2021-07-13 20:37:52,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:52,326 INFO L93 Difference]: Finished difference Result 2671 states and 8693 transitions. [2021-07-13 20:37:52,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:37:52,327 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:37:52,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:52,332 INFO L225 Difference]: With dead ends: 2671 [2021-07-13 20:37:52,332 INFO L226 Difference]: Without dead ends: 2637 [2021-07-13 20:37:52,332 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 9211.0ms TimeCoverageRelationStatistics Valid=388, Invalid=2162, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:37:52,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2637 states. [2021-07-13 20:37:52,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2637 to 1837. [2021-07-13 20:37:52,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1837 states, 1836 states have (on average 3.411764705882353) internal successors, (6264), 1836 states have internal predecessors, (6264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:52,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1837 states to 1837 states and 6264 transitions. [2021-07-13 20:37:52,366 INFO L78 Accepts]: Start accepts. Automaton has 1837 states and 6264 transitions. Word has length 26 [2021-07-13 20:37:52,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:52,366 INFO L482 AbstractCegarLoop]: Abstraction has 1837 states and 6264 transitions. [2021-07-13 20:37:52,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:52,366 INFO L276 IsEmpty]: Start isEmpty. Operand 1837 states and 6264 transitions. [2021-07-13 20:37:52,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:37:52,369 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:52,369 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:52,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1885 [2021-07-13 20:37:52,579 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:52,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:52,579 INFO L82 PathProgramCache]: Analyzing trace with hash 461518918, now seen corresponding path program 31 times [2021-07-13 20:37:52,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:52,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808086673] [2021-07-13 20:37:52,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:52,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:52,954 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:52,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:52,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808086673] [2021-07-13 20:37:52,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808086673] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:52,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568638333] [2021-07-13 20:37:52,954 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 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 [2021-07-13 20:37:52,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:52,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:37:52,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:53,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:53,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:53,201 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:53,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-07-13 20:37:53,202 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:53,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:53,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:53,210 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:37:53,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-07-13 20:37:53,211 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:53,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:53,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:53,222 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:53,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 28 [2021-07-13 20:37:53,225 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:53,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:53,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:53,237 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:37:53,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 23 [2021-07-13 20:37:53,238 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:53,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:53,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:53,282 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:37:53,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 23 [2021-07-13 20:37:53,284 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:53,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:53,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:53,293 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:37:53,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 25 [2021-07-13 20:37:53,294 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:53,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:53,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:53,303 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:37:53,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 27 [2021-07-13 20:37:53,304 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:53,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:53,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:53,313 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:37:53,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 30 [2021-07-13 20:37:53,314 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:53,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:53,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:53,322 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:37:53,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 24 [2021-07-13 20:37:53,323 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:53,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:53,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:53,332 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:37:53,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 27 [2021-07-13 20:37:53,333 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:53,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:53,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:53,342 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:37:53,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 25 [2021-07-13 20:37:53,343 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:53,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:53,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:53,355 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:53,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 30 [2021-07-13 20:37:53,357 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:53,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:53,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:53,367 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:53,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2021-07-13 20:37:53,371 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:53,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:53,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:53,383 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:37:53,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 24 [2021-07-13 20:37:53,385 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:53,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:53,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:53,395 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:53,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 31 [2021-07-13 20:37:53,398 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:53,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:53,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:53,404 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:37:53,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 22 [2021-07-13 20:37:53,405 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:53,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:53,487 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:37:53,487 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:865, output treesize:221 [2021-07-13 20:37:53,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:53,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568638333] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:53,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:53,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-13 20:37:53,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353660254] [2021-07-13 20:37:53,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:37:53,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:53,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:37:53,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:37:53,698 INFO L87 Difference]: Start difference. First operand 1837 states and 6264 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:54,561 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-07-13 20:37:55,436 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-07-13 20:37:55,777 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2021-07-13 20:37:56,045 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 43 [2021-07-13 20:37:56,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:56,207 INFO L93 Difference]: Finished difference Result 2618 states and 8665 transitions. [2021-07-13 20:37:56,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:37:56,207 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:37:56,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:56,212 INFO L225 Difference]: With dead ends: 2618 [2021-07-13 20:37:56,212 INFO L226 Difference]: Without dead ends: 2584 [2021-07-13 20:37:56,212 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 2553.0ms TimeCoverageRelationStatistics Valid=326, Invalid=1480, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:37:56,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2584 states. [2021-07-13 20:37:56,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2584 to 1832. [2021-07-13 20:37:56,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1832 states, 1831 states have (on average 3.409612233752048) internal successors, (6243), 1831 states have internal predecessors, (6243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:56,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1832 states to 1832 states and 6243 transitions. [2021-07-13 20:37:56,241 INFO L78 Accepts]: Start accepts. Automaton has 1832 states and 6243 transitions. Word has length 26 [2021-07-13 20:37:56,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:56,241 INFO L482 AbstractCegarLoop]: Abstraction has 1832 states and 6243 transitions. [2021-07-13 20:37:56,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:56,241 INFO L276 IsEmpty]: Start isEmpty. Operand 1832 states and 6243 transitions. [2021-07-13 20:37:56,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:37:56,243 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:56,244 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:56,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1945,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:56,460 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:56,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:56,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1795376066, now seen corresponding path program 32 times [2021-07-13 20:37:56,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:56,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052617095] [2021-07-13 20:37:56,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:56,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:56,642 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-07-13 20:37:56,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:56,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:56,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052617095] [2021-07-13 20:37:56,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052617095] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:56,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299953479] [2021-07-13 20:37:56,908 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 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 [2021-07-13 20:37:56,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:37:56,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:56,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:37:56,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:57,364 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:57,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-13 20:37:57,368 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:57,387 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:37:57,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-13 20:37:57,391 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:57,537 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-07-13 20:37:57,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:57,556 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:57,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-13 20:37:57,558 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:57,573 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:57,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-13 20:37:57,575 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:57,723 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-07-13 20:37:57,723 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:57,743 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:37:57,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:37:57,745 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:57,764 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:37:57,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-07-13 20:37:57,768 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:57,903 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-07-13 20:37:57,904 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:57,924 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:37:57,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-13 20:37:57,926 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:57,945 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:37:57,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-13 20:37:57,947 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:58,078 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-07-13 20:37:58,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:58,112 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:37:58,112 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:349, output treesize:430 [2021-07-13 20:37:58,365 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2021-07-13 20:37:58,628 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:58,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299953479] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:58,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:58,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:37:58,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741543652] [2021-07-13 20:37:58,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:37:58,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:58,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:37:58,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:37:58,630 INFO L87 Difference]: Start difference. First operand 1832 states and 6243 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:58,818 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 27 [2021-07-13 20:37:59,321 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-07-13 20:37:59,604 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 41 [2021-07-13 20:38:00,068 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2021-07-13 20:38:00,349 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 52 [2021-07-13 20:38:00,559 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 44 [2021-07-13 20:38:00,865 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2021-07-13 20:38:01,222 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 57 [2021-07-13 20:38:01,493 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-07-13 20:38:01,772 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 67 [2021-07-13 20:38:02,096 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2021-07-13 20:38:02,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:02,461 INFO L93 Difference]: Finished difference Result 2647 states and 8625 transitions. [2021-07-13 20:38:02,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:38:02,461 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:38:02,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:02,467 INFO L225 Difference]: With dead ends: 2647 [2021-07-13 20:38:02,467 INFO L226 Difference]: Without dead ends: 2578 [2021-07-13 20:38:02,467 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 4087.0ms TimeCoverageRelationStatistics Valid=344, Invalid=1818, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:38:02,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2578 states. [2021-07-13 20:38:02,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2578 to 1826. [2021-07-13 20:38:02,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1826 states, 1825 states have (on average 3.4076712328767123) internal successors, (6219), 1825 states have internal predecessors, (6219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:02,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1826 states to 1826 states and 6219 transitions. [2021-07-13 20:38:02,498 INFO L78 Accepts]: Start accepts. Automaton has 1826 states and 6219 transitions. Word has length 26 [2021-07-13 20:38:02,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:02,498 INFO L482 AbstractCegarLoop]: Abstraction has 1826 states and 6219 transitions. [2021-07-13 20:38:02,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:02,498 INFO L276 IsEmpty]: Start isEmpty. Operand 1826 states and 6219 transitions. [2021-07-13 20:38:02,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:38:02,501 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:02,501 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:38:02,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1963,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:02,718 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:02,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:02,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1102392532, now seen corresponding path program 48 times [2021-07-13 20:38:02,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:02,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891817093] [2021-07-13 20:38:02,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:02,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:03,014 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2021-07-13 20:38:03,294 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:03,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:03,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891817093] [2021-07-13 20:38:03,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891817093] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:03,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213126394] [2021-07-13 20:38:03,294 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 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 [2021-07-13 20:38:03,321 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:38:03,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:03,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:38:03,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:03,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:03,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:03,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:03,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:03,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:03,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:38:03,799 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:03,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:03,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:03,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:03,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:03,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:03,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-13 20:38:03,806 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:03,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:03,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:03,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:03,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:03,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:03,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-13 20:38:03,813 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:03,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:03,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:03,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:03,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:03,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:03,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:38:03,821 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:03,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:03,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:03,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:03,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:03,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:03,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-07-13 20:38:03,828 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:03,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:03,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:03,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:03,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:03,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:03,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:38:03,836 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:03,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:03,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:03,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:03,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:03,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:03,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-13 20:38:03,843 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:03,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:03,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:03,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:03,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:03,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:03,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-07-13 20:38:03,850 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:03,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:03,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:03,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:03,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:03,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:03,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-07-13 20:38:03,857 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:03,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:03,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:03,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:03,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:03,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:03,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2021-07-13 20:38:03,865 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:03,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:03,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:03,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:03,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:03,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:03,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-13 20:38:03,872 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:03,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:03,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:03,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:03,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:03,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:03,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-13 20:38:03,879 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:03,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:03,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:03,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:03,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:03,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:03,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-07-13 20:38:03,886 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:03,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:03,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:03,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:03,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:03,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:03,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-13 20:38:03,893 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:03,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:03,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:03,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:03,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:03,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:03,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:38:03,900 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:03,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:03,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:03,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:03,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-13 20:38:03,904 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:03,934 INFO L628 ElimStorePlain]: treesize reduction 34, result has 49.3 percent of original size [2021-07-13 20:38:03,935 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:38:03,935 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:21 [2021-07-13 20:38:03,966 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:03,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213126394] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:03,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:03,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-13 20:38:03,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514594504] [2021-07-13 20:38:03,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:38:03,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:03,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:38:03,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:38:03,967 INFO L87 Difference]: Start difference. First operand 1826 states and 6219 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:04,517 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 47 [2021-07-13 20:38:05,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:05,603 INFO L93 Difference]: Finished difference Result 2336 states and 7723 transitions. [2021-07-13 20:38:05,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:38:05,603 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:38:05,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:05,607 INFO L225 Difference]: With dead ends: 2336 [2021-07-13 20:38:05,608 INFO L226 Difference]: Without dead ends: 2314 [2021-07-13 20:38:05,608 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 1922.8ms TimeCoverageRelationStatistics Valid=312, Invalid=1248, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:38:05,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2021-07-13 20:38:05,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 1818. [2021-07-13 20:38:05,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1817 states have (on average 3.4072647220693453) internal successors, (6191), 1817 states have internal predecessors, (6191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:05,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 6191 transitions. [2021-07-13 20:38:05,632 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 6191 transitions. Word has length 26 [2021-07-13 20:38:05,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:05,632 INFO L482 AbstractCegarLoop]: Abstraction has 1818 states and 6191 transitions. [2021-07-13 20:38:05,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:05,632 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 6191 transitions. [2021-07-13 20:38:05,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:38:05,635 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:05,635 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:38:05,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2004 [2021-07-13 20:38:05,848 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:05,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:05,849 INFO L82 PathProgramCache]: Analyzing trace with hash 2027886398, now seen corresponding path program 49 times [2021-07-13 20:38:05,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:05,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110644561] [2021-07-13 20:38:05,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:05,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:06,080 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2021-07-13 20:38:06,206 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2021-07-13 20:38:06,475 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:06,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:06,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110644561] [2021-07-13 20:38:06,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110644561] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:06,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379767562] [2021-07-13 20:38:06,475 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 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 [2021-07-13 20:38:06,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:06,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:38:06,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:06,830 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-07-13 20:38:06,880 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_263, v_prenex_259], 5=[A, v_prenex_261]} [2021-07-13 20:38:06,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:06,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:06,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:06,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-07-13 20:38:06,886 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:06,987 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2021-07-13 20:38:06,987 INFO L628 ElimStorePlain]: treesize reduction 150, result has 45.5 percent of original size [2021-07-13 20:38:06,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:06,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:06,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:06,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-07-13 20:38:06,993 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:07,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:07,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:07,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-13 20:38:07,030 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:07,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:07,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:07,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:07,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-13 20:38:07,063 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:07,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:07,090 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 20:38:07,090 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:314, output treesize:41 [2021-07-13 20:38:07,169 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:07,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379767562] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:07,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:07,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-07-13 20:38:07,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837343840] [2021-07-13 20:38:07,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:38:07,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:07,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:38:07,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:38:07,170 INFO L87 Difference]: Start difference. First operand 1818 states and 6191 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:09,177 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 48 [2021-07-13 20:38:09,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:09,790 INFO L93 Difference]: Finished difference Result 2526 states and 8350 transitions. [2021-07-13 20:38:09,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:38:09,790 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:38:09,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:09,794 INFO L225 Difference]: With dead ends: 2526 [2021-07-13 20:38:09,794 INFO L226 Difference]: Without dead ends: 2511 [2021-07-13 20:38:09,795 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 2832.8ms TimeCoverageRelationStatistics Valid=534, Invalid=2222, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 20:38:09,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2511 states. [2021-07-13 20:38:09,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2511 to 1818. [2021-07-13 20:38:09,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1817 states have (on average 3.4072647220693453) internal successors, (6191), 1817 states have internal predecessors, (6191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:09,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 6191 transitions. [2021-07-13 20:38:09,822 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 6191 transitions. Word has length 26 [2021-07-13 20:38:09,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:09,822 INFO L482 AbstractCegarLoop]: Abstraction has 1818 states and 6191 transitions. [2021-07-13 20:38:09,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:09,822 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 6191 transitions. [2021-07-13 20:38:09,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:38:09,825 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:09,825 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:38:10,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2098,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:10,041 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:10,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:10,042 INFO L82 PathProgramCache]: Analyzing trace with hash 849981858, now seen corresponding path program 50 times [2021-07-13 20:38:10,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:10,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984818798] [2021-07-13 20:38:10,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:10,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:10,477 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:10,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:10,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984818798] [2021-07-13 20:38:10,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984818798] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:10,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006650196] [2021-07-13 20:38:10,477 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 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 [2021-07-13 20:38:10,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:38:10,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:10,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:38:10,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:10,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:10,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:10,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:10,753 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-07-13 20:38:10,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 33 [2021-07-13 20:38:10,755 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:10,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:10,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:10,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:10,783 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-07-13 20:38:10,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 26 [2021-07-13 20:38:10,785 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:10,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:10,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:10,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:10,812 INFO L354 Elim1Store]: treesize reduction 24, result has 22.6 percent of original size [2021-07-13 20:38:10,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 25 [2021-07-13 20:38:10,814 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:10,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:10,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:10,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:10,839 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-07-13 20:38:10,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 30 [2021-07-13 20:38:10,841 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:10,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:10,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:10,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:10,858 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-13 20:38:10,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-07-13 20:38:10,859 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:10,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:10,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:10,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:10,887 INFO L354 Elim1Store]: treesize reduction 12, result has 61.3 percent of original size [2021-07-13 20:38:10,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-07-13 20:38:10,891 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:10,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:10,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:10,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:10,916 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-07-13 20:38:10,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 26 [2021-07-13 20:38:10,917 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:10,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:10,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:10,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:10,935 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-13 20:38:10,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-07-13 20:38:10,935 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:10,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:10,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:10,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:10,971 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-13 20:38:10,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-07-13 20:38:10,972 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:10,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:10,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:10,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:10,994 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-07-13 20:38:10,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 23 [2021-07-13 20:38:10,996 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:11,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:11,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:11,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:11,018 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:11,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 43 [2021-07-13 20:38:11,025 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:11,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:11,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:11,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:11,040 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-13 20:38:11,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-07-13 20:38:11,040 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:11,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:11,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:11,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:11,055 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-13 20:38:11,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-07-13 20:38:11,056 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:11,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:11,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:11,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:11,070 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-13 20:38:11,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-07-13 20:38:11,071 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:11,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:11,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:11,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:11,092 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-13 20:38:11,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-07-13 20:38:11,092 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:11,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:11,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:11,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:11,101 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-13 20:38:11,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-07-13 20:38:11,101 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:11,181 INFO L628 ElimStorePlain]: treesize reduction 76, result has 55.0 percent of original size [2021-07-13 20:38:11,182 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:38:11,183 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:753, output treesize:93 [2021-07-13 20:38:11,267 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:11,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006650196] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:11,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:11,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2021-07-13 20:38:11,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998692767] [2021-07-13 20:38:11,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:38:11,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:11,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:38:11,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:38:11,268 INFO L87 Difference]: Start difference. First operand 1818 states and 6191 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:13,527 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2021-07-13 20:38:13,898 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2021-07-13 20:38:14,332 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2021-07-13 20:38:14,813 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-07-13 20:38:15,092 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-07-13 20:38:15,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:15,474 INFO L93 Difference]: Finished difference Result 3017 states and 9720 transitions. [2021-07-13 20:38:15,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 20:38:15,475 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:38:15,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:15,480 INFO L225 Difference]: With dead ends: 3017 [2021-07-13 20:38:15,480 INFO L226 Difference]: Without dead ends: 2970 [2021-07-13 20:38:15,480 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1244 ImplicationChecksByTransitivity, 3831.1ms TimeCoverageRelationStatistics Valid=708, Invalid=3452, Unknown=0, NotChecked=0, Total=4160 [2021-07-13 20:38:15,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2970 states. [2021-07-13 20:38:15,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2970 to 1841. [2021-07-13 20:38:15,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1840 states have (on average 3.3967391304347827) internal successors, (6250), 1840 states have internal predecessors, (6250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:15,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 6250 transitions. [2021-07-13 20:38:15,512 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 6250 transitions. Word has length 26 [2021-07-13 20:38:15,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:15,512 INFO L482 AbstractCegarLoop]: Abstraction has 1841 states and 6250 transitions. [2021-07-13 20:38:15,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:15,512 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 6250 transitions. [2021-07-13 20:38:15,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:38:15,515 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:15,515 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:38:15,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2112 [2021-07-13 20:38:15,731 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:15,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:15,731 INFO L82 PathProgramCache]: Analyzing trace with hash -696255298, now seen corresponding path program 51 times [2021-07-13 20:38:15,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:15,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231992945] [2021-07-13 20:38:15,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:15,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:16,089 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:16,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:16,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231992945] [2021-07-13 20:38:16,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231992945] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:16,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957134003] [2021-07-13 20:38:16,090 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 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 [2021-07-13 20:38:16,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:38:16,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:16,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:38:16,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:16,558 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-07-13 20:38:16,764 INFO L446 ElimStorePlain]: Different costs {5=[A, v_prenex_273, v_prenex_265, v_prenex_277, v_prenex_267, v_prenex_269], 6=[v_prenex_271, v_prenex_275]} [2021-07-13 20:38:16,829 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-07-13 20:38:16,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 51 [2021-07-13 20:38:16,836 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:16,890 INFO L354 Elim1Store]: treesize reduction 25, result has 39.0 percent of original size [2021-07-13 20:38:16,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 34 [2021-07-13 20:38:16,892 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:17,900 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 177 DAG size of output: 176 [2021-07-13 20:38:17,900 INFO L628 ElimStorePlain]: treesize reduction 5, result has 99.5 percent of original size [2021-07-13 20:38:17,945 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:17,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 59 [2021-07-13 20:38:17,957 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:18,003 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-07-13 20:38:18,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 43 [2021-07-13 20:38:18,008 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:19,599 WARN L205 SmtUtils]: Spent 1.59 s on a formula simplification. DAG size of input: 183 DAG size of output: 171 [2021-07-13 20:38:19,600 INFO L628 ElimStorePlain]: treesize reduction 45, result has 95.3 percent of original size [2021-07-13 20:38:19,665 INFO L354 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2021-07-13 20:38:19,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 55 [2021-07-13 20:38:19,675 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:19,732 INFO L354 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2021-07-13 20:38:19,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 55 [2021-07-13 20:38:19,740 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:20,795 WARN L205 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 182 DAG size of output: 176 [2021-07-13 20:38:20,795 INFO L628 ElimStorePlain]: treesize reduction 44, result has 95.4 percent of original size [2021-07-13 20:38:20,857 INFO L354 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2021-07-13 20:38:20,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 55 [2021-07-13 20:38:20,864 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:20,911 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-07-13 20:38:20,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 48 [2021-07-13 20:38:20,920 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:21,907 WARN L205 SmtUtils]: Spent 986.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 167 [2021-07-13 20:38:21,908 INFO L628 ElimStorePlain]: treesize reduction 37, result has 96.0 percent of original size [2021-07-13 20:38:21,959 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-07-13 20:38:21,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 31 treesize of output 47 [2021-07-13 20:38:21,962 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:22,002 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-07-13 20:38:22,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 44 [2021-07-13 20:38:22,006 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:22,474 WARN L205 SmtUtils]: Spent 467.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-07-13 20:38:22,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:22,520 INFO L354 Elim1Store]: treesize reduction 20, result has 51.2 percent of original size [2021-07-13 20:38:22,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 36 [2021-07-13 20:38:22,522 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:22,569 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-07-13 20:38:22,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 47 [2021-07-13 20:38:22,572 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:23,071 WARN L205 SmtUtils]: Spent 499.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2021-07-13 20:38:23,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:23,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:23,109 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:23,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 57 [2021-07-13 20:38:23,124 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:23,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:23,170 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-07-13 20:38:23,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 52 [2021-07-13 20:38:23,177 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:23,639 WARN L205 SmtUtils]: Spent 461.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2021-07-13 20:38:23,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:23,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:23,690 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-07-13 20:38:23,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 52 [2021-07-13 20:38:23,702 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:23,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:23,718 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-07-13 20:38:23,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 32 treesize of output 1 [2021-07-13 20:38:23,719 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:24,130 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2021-07-13 20:38:24,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:24,172 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 15 xjuncts. [2021-07-13 20:38:24,173 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:957, output treesize:1656 [2021-07-13 20:38:24,761 WARN L205 SmtUtils]: Spent 518.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 64 [2021-07-13 20:38:25,048 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-07-13 20:38:25,217 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:25,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957134003] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:25,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:25,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-13 20:38:25,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021811291] [2021-07-13 20:38:25,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:38:25,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:25,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:38:25,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:38:25,218 INFO L87 Difference]: Start difference. First operand 1841 states and 6250 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:25,576 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2021-07-13 20:38:25,950 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 41 [2021-07-13 20:38:26,159 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-07-13 20:38:26,554 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 47 [2021-07-13 20:38:27,054 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 63 [2021-07-13 20:38:27,570 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 70 [2021-07-13 20:38:27,733 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2021-07-13 20:38:28,284 WARN L205 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 60 [2021-07-13 20:38:28,793 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 78 [2021-07-13 20:38:29,188 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 54 [2021-07-13 20:38:29,358 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 46 [2021-07-13 20:38:29,671 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 61 [2021-07-13 20:38:30,291 WARN L205 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 76 [2021-07-13 20:38:30,581 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 44 [2021-07-13 20:38:30,785 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 50 [2021-07-13 20:38:31,454 WARN L205 SmtUtils]: Spent 608.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 85 [2021-07-13 20:38:32,329 WARN L205 SmtUtils]: Spent 709.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 77 [2021-07-13 20:38:32,637 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 52 [2021-07-13 20:38:33,102 WARN L205 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 72 [2021-07-13 20:38:33,318 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 33 [2021-07-13 20:38:33,525 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 39 [2021-07-13 20:38:33,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:33,656 INFO L93 Difference]: Finished difference Result 3177 states and 10241 transitions. [2021-07-13 20:38:33,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:38:33,657 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:38:33,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:33,663 INFO L225 Difference]: With dead ends: 3177 [2021-07-13 20:38:33,663 INFO L226 Difference]: Without dead ends: 3132 [2021-07-13 20:38:33,663 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 973 ImplicationChecksByTransitivity, 8991.5ms TimeCoverageRelationStatistics Valid=674, Invalid=2986, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:38:33,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3132 states. [2021-07-13 20:38:33,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3132 to 1888. [2021-07-13 20:38:33,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1888 states, 1887 states have (on average 3.3995760466348703) internal successors, (6415), 1887 states have internal predecessors, (6415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:33,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1888 states to 1888 states and 6415 transitions. [2021-07-13 20:38:33,697 INFO L78 Accepts]: Start accepts. Automaton has 1888 states and 6415 transitions. Word has length 26 [2021-07-13 20:38:33,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:33,698 INFO L482 AbstractCegarLoop]: Abstraction has 1888 states and 6415 transitions. [2021-07-13 20:38:33,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:33,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1888 states and 6415 transitions. [2021-07-13 20:38:33,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:38:33,700 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:33,700 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:38:33,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2138 [2021-07-13 20:38:33,916 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:33,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:33,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1813857782, now seen corresponding path program 52 times [2021-07-13 20:38:33,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:33,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112473087] [2021-07-13 20:38:33,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:33,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:34,342 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:34,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:34,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112473087] [2021-07-13 20:38:34,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112473087] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:34,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136582682] [2021-07-13 20:38:34,344 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 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 [2021-07-13 20:38:34,369 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:38:34,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:34,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:38:34,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:34,705 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-07-13 20:38:34,858 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_287], 6=[v_prenex_285, v_prenex_289]} [2021-07-13 20:38:34,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:34,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:34,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-13 20:38:34,867 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:34,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:34,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:34,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 13 [2021-07-13 20:38:34,873 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:34,979 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2021-07-13 20:38:34,980 INFO L628 ElimStorePlain]: treesize reduction 154, result has 43.2 percent of original size [2021-07-13 20:38:34,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:34,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-07-13 20:38:34,985 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:35,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:35,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:35,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:35,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:35,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-13 20:38:35,025 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:35,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:35,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:35,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:35,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:35,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:38:35,063 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:35,090 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:35,092 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 20:38:35,092 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:337, output treesize:55 [2021-07-13 20:38:35,139 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:35,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136582682] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:35,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:35,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-07-13 20:38:35,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413439685] [2021-07-13 20:38:35,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:38:35,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:35,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:38:35,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:38:35,140 INFO L87 Difference]: Start difference. First operand 1888 states and 6415 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:36,445 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2021-07-13 20:38:36,651 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 41 [2021-07-13 20:38:37,140 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 55 [2021-07-13 20:38:37,314 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-07-13 20:38:37,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:37,516 INFO L93 Difference]: Finished difference Result 2395 states and 7935 transitions. [2021-07-13 20:38:37,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:38:37,516 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:38:37,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:37,520 INFO L225 Difference]: With dead ends: 2395 [2021-07-13 20:38:37,520 INFO L226 Difference]: Without dead ends: 2380 [2021-07-13 20:38:37,521 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 2538.5ms TimeCoverageRelationStatistics Valid=326, Invalid=1566, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:38:37,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2380 states. [2021-07-13 20:38:37,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2380 to 1886. [2021-07-13 20:38:37,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1886 states, 1885 states have (on average 3.39946949602122) internal successors, (6408), 1885 states have internal predecessors, (6408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:37,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 6408 transitions. [2021-07-13 20:38:37,546 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 6408 transitions. Word has length 26 [2021-07-13 20:38:37,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:37,546 INFO L482 AbstractCegarLoop]: Abstraction has 1886 states and 6408 transitions. [2021-07-13 20:38:37,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:37,546 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 6408 transitions. [2021-07-13 20:38:37,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:38:37,561 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:37,561 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:38:37,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2263 [2021-07-13 20:38:37,778 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:37,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:37,779 INFO L82 PathProgramCache]: Analyzing trace with hash -782211534, now seen corresponding path program 53 times [2021-07-13 20:38:37,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:37,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543485736] [2021-07-13 20:38:37,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:37,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:38,187 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:38,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:38,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543485736] [2021-07-13 20:38:38,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543485736] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:38,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68360755] [2021-07-13 20:38:38,188 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 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 [2021-07-13 20:38:38,214 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:38:38,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:38,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:38:38,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:38,740 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-07-13 20:38:38,954 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-07-13 20:38:39,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:39,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:39,191 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-07-13 20:38:39,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 26 [2021-07-13 20:38:39,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:39,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:39,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:39,219 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:39,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-07-13 20:38:39,225 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:39,622 WARN L205 SmtUtils]: Spent 396.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-07-13 20:38:39,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:39,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:39,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:39,666 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-07-13 20:38:39,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 43 [2021-07-13 20:38:39,670 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:39,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:39,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:39,696 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-07-13 20:38:39,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2021-07-13 20:38:39,699 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:40,060 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2021-07-13 20:38:40,061 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:40,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:40,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:40,095 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-13 20:38:40,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 35 [2021-07-13 20:38:40,097 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:40,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:40,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:40,122 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-07-13 20:38:40,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 28 [2021-07-13 20:38:40,123 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:40,461 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2021-07-13 20:38:40,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:40,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:40,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:40,508 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-07-13 20:38:40,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 33 [2021-07-13 20:38:40,510 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:40,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:40,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:40,534 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:40,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 47 [2021-07-13 20:38:40,541 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:41,136 WARN L205 SmtUtils]: Spent 595.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 140 [2021-07-13 20:38:41,137 INFO L628 ElimStorePlain]: treesize reduction 36, result has 94.8 percent of original size [2021-07-13 20:38:41,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:41,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:41,166 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:41,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 47 [2021-07-13 20:38:41,171 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:41,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:41,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:41,197 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-07-13 20:38:41,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 33 [2021-07-13 20:38:41,201 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:41,764 WARN L205 SmtUtils]: Spent 562.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 129 [2021-07-13 20:38:41,765 INFO L628 ElimStorePlain]: treesize reduction 38, result has 94.0 percent of original size [2021-07-13 20:38:41,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:41,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:41,792 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-07-13 20:38:41,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 26 [2021-07-13 20:38:41,794 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:41,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:41,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:41,818 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-13 20:38:41,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 35 [2021-07-13 20:38:41,821 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:42,104 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-07-13 20:38:42,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:42,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:42,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:42,138 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-13 20:38:42,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 35 [2021-07-13 20:38:42,142 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:42,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:42,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:42,157 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:38:42,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-07-13 20:38:42,157 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:42,399 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-07-13 20:38:42,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:42,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:42,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:42,428 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-07-13 20:38:42,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 26 [2021-07-13 20:38:42,430 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:42,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:42,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:42,464 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-13 20:38:42,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-07-13 20:38:42,468 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:42,831 WARN L205 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 97 [2021-07-13 20:38:42,832 INFO L628 ElimStorePlain]: treesize reduction 32, result has 92.7 percent of original size [2021-07-13 20:38:42,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-07-13 20:38:42,844 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:841, output treesize:391 [2021-07-13 20:38:42,982 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:42,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68360755] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:42,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:42,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-07-13 20:38:42,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564181234] [2021-07-13 20:38:42,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:38:42,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:42,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:38:42,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:38:42,984 INFO L87 Difference]: Start difference. First operand 1886 states and 6408 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:52,248 WARN L205 SmtUtils]: Spent 7.47 s on a formula simplification. DAG size of input: 86 DAG size of output: 68 [2021-07-13 20:39:03,254 WARN L205 SmtUtils]: Spent 10.76 s on a formula simplification. DAG size of input: 93 DAG size of output: 69 [2021-07-13 20:39:04,150 WARN L205 SmtUtils]: Spent 841.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 154 [2021-07-13 20:39:04,398 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-07-13 20:39:04,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:04,700 INFO L93 Difference]: Finished difference Result 2712 states and 8977 transitions. [2021-07-13 20:39:04,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:39:04,701 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:39:04,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:04,705 INFO L225 Difference]: With dead ends: 2712 [2021-07-13 20:39:04,705 INFO L226 Difference]: Without dead ends: 2682 [2021-07-13 20:39:04,706 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 22072.3ms TimeCoverageRelationStatistics Valid=434, Invalid=2116, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:39:04,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2682 states. [2021-07-13 20:39:04,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2682 to 1886. [2021-07-13 20:39:04,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1886 states, 1885 states have (on average 3.39946949602122) internal successors, (6408), 1885 states have internal predecessors, (6408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:04,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 6408 transitions. [2021-07-13 20:39:04,734 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 6408 transitions. Word has length 26 [2021-07-13 20:39:04,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:04,734 INFO L482 AbstractCegarLoop]: Abstraction has 1886 states and 6408 transitions. [2021-07-13 20:39:04,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:04,734 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 6408 transitions. [2021-07-13 20:39:04,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:39:04,737 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:04,737 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:39:04,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2277 [2021-07-13 20:39:04,952 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:04,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:04,953 INFO L82 PathProgramCache]: Analyzing trace with hash 376151132, now seen corresponding path program 54 times [2021-07-13 20:39:04,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:04,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824930371] [2021-07-13 20:39:04,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:04,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:05,136 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-07-13 20:39:05,452 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:05,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:05,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824930371] [2021-07-13 20:39:05,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824930371] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:05,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321952512] [2021-07-13 20:39:05,452 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 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 [2021-07-13 20:39:05,477 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:39:05,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:05,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:39:05,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:05,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:05,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:05,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:05,693 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-07-13 20:39:05,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 30 [2021-07-13 20:39:05,698 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:05,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:05,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:05,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:05,725 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-07-13 20:39:05,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 33 [2021-07-13 20:39:05,729 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:05,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:05,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:05,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:05,744 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-13 20:39:05,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-07-13 20:39:05,745 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:05,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:05,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:05,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:05,761 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-13 20:39:05,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-07-13 20:39:05,761 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:05,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:05,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:05,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:05,784 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:05,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 43 [2021-07-13 20:39:05,790 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:05,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:05,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:05,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:05,820 INFO L354 Elim1Store]: treesize reduction 12, result has 61.3 percent of original size [2021-07-13 20:39:05,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-07-13 20:39:05,824 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:05,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:05,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:05,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:05,842 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-13 20:39:05,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-07-13 20:39:05,843 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:05,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:05,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:05,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:05,860 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-13 20:39:05,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-07-13 20:39:05,861 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:05,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:05,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:05,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:05,878 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-13 20:39:05,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-07-13 20:39:05,879 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:05,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:05,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:05,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:05,905 INFO L354 Elim1Store]: treesize reduction 24, result has 22.6 percent of original size [2021-07-13 20:39:05,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 25 [2021-07-13 20:39:05,906 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:05,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:05,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:05,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:05,924 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-13 20:39:05,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-07-13 20:39:05,925 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:05,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:05,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:05,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:05,943 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-13 20:39:05,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-07-13 20:39:05,944 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:05,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:05,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:05,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:05,961 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-13 20:39:05,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-07-13 20:39:05,962 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:05,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:05,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:05,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:05,979 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-13 20:39:05,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-07-13 20:39:05,980 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:05,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:05,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:05,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:05,996 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-13 20:39:05,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-07-13 20:39:05,997 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:06,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:06,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:06,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:06,007 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-13 20:39:06,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-07-13 20:39:06,008 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:06,050 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:06,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:39:06,051 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:753, output treesize:93 [2021-07-13 20:39:06,171 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:06,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321952512] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:06,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:06,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-13 20:39:06,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027469314] [2021-07-13 20:39:06,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:39:06,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:06,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:39:06,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:39:06,172 INFO L87 Difference]: Start difference. First operand 1886 states and 6408 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:06,986 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 41 [2021-07-13 20:39:07,497 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2021-07-13 20:39:08,097 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 43 [2021-07-13 20:39:08,420 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2021-07-13 20:39:08,719 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2021-07-13 20:39:08,919 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2021-07-13 20:39:09,075 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 38 [2021-07-13 20:39:09,257 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 36 [2021-07-13 20:39:09,639 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2021-07-13 20:39:09,829 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 39 [2021-07-13 20:39:10,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:10,054 INFO L93 Difference]: Finished difference Result 3398 states and 10882 transitions. [2021-07-13 20:39:10,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-13 20:39:10,054 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:39:10,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:10,061 INFO L225 Difference]: With dead ends: 3398 [2021-07-13 20:39:10,061 INFO L226 Difference]: Without dead ends: 3364 [2021-07-13 20:39:10,061 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 3877.3ms TimeCoverageRelationStatistics Valid=768, Invalid=2424, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:39:10,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3364 states. [2021-07-13 20:39:10,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3364 to 1892. [2021-07-13 20:39:10,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1892 states, 1891 states have (on average 3.405076679005817) internal successors, (6439), 1891 states have internal predecessors, (6439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:10,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1892 states to 1892 states and 6439 transitions. [2021-07-13 20:39:10,125 INFO L78 Accepts]: Start accepts. Automaton has 1892 states and 6439 transitions. Word has length 26 [2021-07-13 20:39:10,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:10,126 INFO L482 AbstractCegarLoop]: Abstraction has 1892 states and 6439 transitions. [2021-07-13 20:39:10,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:10,126 INFO L276 IsEmpty]: Start isEmpty. Operand 1892 states and 6439 transitions. [2021-07-13 20:39:10,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:39:10,128 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:10,128 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:39:10,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2347 [2021-07-13 20:39:10,337 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:10,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:10,337 INFO L82 PathProgramCache]: Analyzing trace with hash 871796194, now seen corresponding path program 33 times [2021-07-13 20:39:10,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:10,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986355517] [2021-07-13 20:39:10,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:10,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:10,754 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:10,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:10,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986355517] [2021-07-13 20:39:10,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986355517] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:10,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206157407] [2021-07-13 20:39:10,755 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 [2021-07-13 20:39:10,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:39:10,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:10,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:39:10,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:11,258 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-07-13 20:39:11,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:11,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:11,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:39:11,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:11,536 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-07-13 20:39:11,536 INFO L628 ElimStorePlain]: treesize reduction 98, result has 60.6 percent of original size [2021-07-13 20:39:11,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:11,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:11,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:39:11,542 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:11,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:11,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:11,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:11,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:39:11,606 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:11,660 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:11,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:11,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:11,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:11,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:39:11,667 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:11,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:11,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:39:11,672 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:11,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:11,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:39:11,751 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 12 variables, input treesize:285, output treesize:51 [2021-07-13 20:39:11,802 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:11,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206157407] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:11,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:11,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 20:39:11,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327270541] [2021-07-13 20:39:11,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:39:11,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:11,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:39:11,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:39:11,803 INFO L87 Difference]: Start difference. First operand 1892 states and 6439 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:12,624 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2021-07-13 20:39:12,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:12,820 INFO L93 Difference]: Finished difference Result 2313 states and 7725 transitions. [2021-07-13 20:39:12,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:39:12,821 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:39:12,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:12,825 INFO L225 Difference]: With dead ends: 2313 [2021-07-13 20:39:12,825 INFO L226 Difference]: Without dead ends: 2298 [2021-07-13 20:39:12,826 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1482.5ms TimeCoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:39:12,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2298 states. [2021-07-13 20:39:12,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2298 to 1884. [2021-07-13 20:39:12,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1884 states, 1883 states have (on average 3.4083908656399364) internal successors, (6418), 1883 states have internal predecessors, (6418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:12,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1884 states to 1884 states and 6418 transitions. [2021-07-13 20:39:12,854 INFO L78 Accepts]: Start accepts. Automaton has 1884 states and 6418 transitions. Word has length 26 [2021-07-13 20:39:12,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:12,854 INFO L482 AbstractCegarLoop]: Abstraction has 1884 states and 6418 transitions. [2021-07-13 20:39:12,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:12,854 INFO L276 IsEmpty]: Start isEmpty. Operand 1884 states and 6418 transitions. [2021-07-13 20:39:12,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:39:12,857 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:12,857 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:39:13,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2376 [2021-07-13 20:39:13,073 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:13,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:13,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1200955766, now seen corresponding path program 34 times [2021-07-13 20:39:13,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:13,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159309749] [2021-07-13 20:39:13,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:13,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:13,457 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:13,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:13,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159309749] [2021-07-13 20:39:13,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159309749] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:13,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849783522] [2021-07-13 20:39:13,457 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 [2021-07-13 20:39:13,482 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:39:13,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:13,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:39:13,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:13,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:13,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:13,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:13,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:39:13,842 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:13,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:13,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:13,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:13,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:39:13,848 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:13,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:13,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:13,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:13,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:39:13,855 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:13,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:13,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:13,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:13,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-13 20:39:13,862 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:13,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:13,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:13,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:13,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:39:13,869 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:13,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:13,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:13,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:13,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:39:13,876 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:13,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:13,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:13,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:13,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:39:13,883 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:13,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:13,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:13,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:13,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-13 20:39:13,890 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:13,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:13,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:13,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:13,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:39:13,897 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:13,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:13,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:13,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:13,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:39:13,904 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:13,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:13,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:13,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:13,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:39:13,911 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:13,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:13,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:13,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:13,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-07-13 20:39:13,917 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:13,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:13,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:13,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:13,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:39:13,923 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:13,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:13,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:13,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:13,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:39:13,929 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:13,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:13,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:13,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:39:13,933 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:14,014 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-07-13 20:39:14,015 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:39:14,016 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-07-13 20:39:14,068 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:14,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849783522] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:14,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:14,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 20:39:14,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192400750] [2021-07-13 20:39:14,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:39:14,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:14,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:39:14,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:39:14,069 INFO L87 Difference]: Start difference. First operand 1884 states and 6418 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:14,360 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 48 [2021-07-13 20:39:14,490 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2021-07-13 20:39:14,723 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 39 [2021-07-13 20:39:15,231 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2021-07-13 20:39:15,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:15,453 INFO L93 Difference]: Finished difference Result 2549 states and 8455 transitions. [2021-07-13 20:39:15,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:39:15,454 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:39:15,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:15,458 INFO L225 Difference]: With dead ends: 2549 [2021-07-13 20:39:15,459 INFO L226 Difference]: Without dead ends: 2534 [2021-07-13 20:39:15,459 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1606.8ms TimeCoverageRelationStatistics Valid=186, Invalid=744, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:39:15,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2534 states. [2021-07-13 20:39:15,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2534 to 1876. [2021-07-13 20:39:15,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1876 states, 1875 states have (on average 3.4074666666666666) internal successors, (6389), 1875 states have internal predecessors, (6389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:15,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1876 states to 1876 states and 6389 transitions. [2021-07-13 20:39:15,489 INFO L78 Accepts]: Start accepts. Automaton has 1876 states and 6389 transitions. Word has length 26 [2021-07-13 20:39:15,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:15,489 INFO L482 AbstractCegarLoop]: Abstraction has 1876 states and 6389 transitions. [2021-07-13 20:39:15,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:15,490 INFO L276 IsEmpty]: Start isEmpty. Operand 1876 states and 6389 transitions. [2021-07-13 20:39:15,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:39:15,492 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:15,492 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:39:15,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2396,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:15,708 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:15,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:15,709 INFO L82 PathProgramCache]: Analyzing trace with hash -179287784, now seen corresponding path program 35 times [2021-07-13 20:39:15,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:15,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076248955] [2021-07-13 20:39:15,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:15,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:16,016 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:16,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:16,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076248955] [2021-07-13 20:39:16,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076248955] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:16,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495940259] [2021-07-13 20:39:16,016 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 [2021-07-13 20:39:16,043 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:39:16,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:16,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:39:16,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:16,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:16,624 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:39:16,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-13 20:39:16,626 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:16,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:16,641 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:16,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-13 20:39:16,647 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:16,784 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-07-13 20:39:16,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:16,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:16,808 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:39:16,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-13 20:39:16,810 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:16,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:16,829 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:39:16,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-13 20:39:16,832 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:16,965 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-07-13 20:39:16,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:16,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:16,982 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:16,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-13 20:39:16,984 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:16,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:17,000 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:39:17,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:39:17,002 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:17,140 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-07-13 20:39:17,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:17,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:17,161 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:39:17,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-07-13 20:39:17,165 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:17,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:17,178 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:17,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-13 20:39:17,180 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:17,298 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-07-13 20:39:17,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:17,316 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:39:17,317 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:349, output treesize:314 [2021-07-13 20:39:17,522 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2021-07-13 20:39:17,619 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:17,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495940259] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:17,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:17,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 20:39:17,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466926850] [2021-07-13 20:39:17,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:39:17,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:17,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:39:17,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:39:17,621 INFO L87 Difference]: Start difference. First operand 1876 states and 6389 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:18,305 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2021-07-13 20:39:18,503 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 48 [2021-07-13 20:39:18,818 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 59 [2021-07-13 20:39:19,214 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-07-13 20:39:19,645 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2021-07-13 20:39:19,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:19,967 INFO L93 Difference]: Finished difference Result 2284 states and 7582 transitions. [2021-07-13 20:39:19,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:39:19,967 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:39:19,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:19,971 INFO L225 Difference]: With dead ends: 2284 [2021-07-13 20:39:19,972 INFO L226 Difference]: Without dead ends: 2269 [2021-07-13 20:39:19,972 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 2388.5ms TimeCoverageRelationStatistics Valid=131, Invalid=861, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:39:19,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2269 states. [2021-07-13 20:39:19,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2269 to 1867. [2021-07-13 20:39:19,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1867 states, 1866 states have (on average 3.404608788853162) internal successors, (6353), 1866 states have internal predecessors, (6353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:19,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1867 states to 1867 states and 6353 transitions. [2021-07-13 20:39:19,996 INFO L78 Accepts]: Start accepts. Automaton has 1867 states and 6353 transitions. Word has length 26 [2021-07-13 20:39:19,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:19,997 INFO L482 AbstractCegarLoop]: Abstraction has 1867 states and 6353 transitions. [2021-07-13 20:39:19,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:19,997 INFO L276 IsEmpty]: Start isEmpty. Operand 1867 states and 6353 transitions. [2021-07-13 20:39:19,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:39:20,000 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:20,000 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:39:20,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2424,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:20,216 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:20,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:20,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1269968860, now seen corresponding path program 36 times [2021-07-13 20:39:20,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:20,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629991089] [2021-07-13 20:39:20,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:20,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:20,521 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:20,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:20,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629991089] [2021-07-13 20:39:20,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629991089] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:20,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930642894] [2021-07-13 20:39:20,521 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 [2021-07-13 20:39:20,551 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:39:20,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:20,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:39:20,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:20,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:20,786 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:20,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:39:20,787 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:20,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:20,795 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:20,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:39:20,796 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:20,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:20,807 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:39:20,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:39:20,809 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:20,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:20,817 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:20,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:39:20,818 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:20,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:20,829 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:39:20,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:39:20,831 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:20,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:20,842 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:20,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:39:20,843 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:20,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:20,852 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:20,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:39:20,853 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:20,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:20,865 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:20,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-13 20:39:20,866 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:20,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:20,877 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:20,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:39:20,894 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:20,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:20,903 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:20,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-07-13 20:39:20,904 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:20,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:20,914 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:20,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-07-13 20:39:20,915 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:20,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:20,926 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:20,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:39:20,928 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:20,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:20,940 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:39:20,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-13 20:39:20,942 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:20,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:20,952 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:20,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:39:20,956 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:20,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:20,964 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:20,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:39:20,965 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:20,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:20,970 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:20,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:39:20,971 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:21,078 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-07-13 20:39:21,079 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:21,080 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:39:21,080 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-07-13 20:39:21,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:21,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930642894] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:21,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:21,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-13 20:39:21,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556470394] [2021-07-13 20:39:21,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:39:21,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:21,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:39:21,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:39:21,250 INFO L87 Difference]: Start difference. First operand 1867 states and 6353 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:21,742 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-07-13 20:39:22,073 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 52 [2021-07-13 20:39:22,362 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2021-07-13 20:39:22,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:22,534 INFO L93 Difference]: Finished difference Result 2064 states and 6910 transitions. [2021-07-13 20:39:22,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:39:22,535 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:39:22,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:22,539 INFO L225 Difference]: With dead ends: 2064 [2021-07-13 20:39:22,539 INFO L226 Difference]: Without dead ends: 2049 [2021-07-13 20:39:22,539 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1526.4ms TimeCoverageRelationStatistics Valid=175, Invalid=817, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:39:22,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2049 states. [2021-07-13 20:39:22,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2049 to 1860. [2021-07-13 20:39:22,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1860 states, 1859 states have (on average 3.4023668639053253) internal successors, (6325), 1859 states have internal predecessors, (6325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:22,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1860 states to 1860 states and 6325 transitions. [2021-07-13 20:39:22,564 INFO L78 Accepts]: Start accepts. Automaton has 1860 states and 6325 transitions. Word has length 26 [2021-07-13 20:39:22,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:22,564 INFO L482 AbstractCegarLoop]: Abstraction has 1860 states and 6325 transitions. [2021-07-13 20:39:22,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:22,564 INFO L276 IsEmpty]: Start isEmpty. Operand 1860 states and 6325 transitions. [2021-07-13 20:39:22,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:39:22,566 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:22,567 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:39:22,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2491,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:22,783 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:22,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:22,783 INFO L82 PathProgramCache]: Analyzing trace with hash 663462910, now seen corresponding path program 37 times [2021-07-13 20:39:22,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:22,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899647754] [2021-07-13 20:39:22,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:22,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:23,125 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:23,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:23,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899647754] [2021-07-13 20:39:23,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899647754] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:23,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000011895] [2021-07-13 20:39:23,125 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 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 [2021-07-13 20:39:23,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:23,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:39:23,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:23,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:23,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:23,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:23,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:39:23,442 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:23,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:23,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:23,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:23,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:39:23,448 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:23,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:23,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:23,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:23,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-13 20:39:23,454 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:23,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:23,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:23,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:23,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-07-13 20:39:23,460 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:23,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:23,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:23,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:23,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:39:23,466 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:23,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:23,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:23,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:23,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:39:23,472 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:23,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:23,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:23,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:23,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:39:23,477 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:23,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:23,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:23,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:23,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:39:23,483 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:23,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:23,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:23,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:23,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:39:23,489 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:23,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:23,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:23,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:23,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-13 20:39:23,495 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:23,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:23,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:23,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:23,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:39:23,500 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:23,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:23,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:23,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:23,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:39:23,506 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:23,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:23,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:23,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:23,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:39:23,511 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:23,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:23,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:23,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:23,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:39:23,516 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:23,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:23,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:23,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:39:23,520 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:23,599 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-07-13 20:39:23,600 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:39:23,600 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-07-13 20:39:23,651 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:23,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000011895] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:23,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:23,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 20:39:23,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258378946] [2021-07-13 20:39:23,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:39:23,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:23,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:39:23,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:39:23,652 INFO L87 Difference]: Start difference. First operand 1860 states and 6325 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:24,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:24,315 INFO L93 Difference]: Finished difference Result 2341 states and 7786 transitions. [2021-07-13 20:39:24,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:39:24,315 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:39:24,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:24,320 INFO L225 Difference]: With dead ends: 2341 [2021-07-13 20:39:24,320 INFO L226 Difference]: Without dead ends: 2320 [2021-07-13 20:39:24,320 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 925.6ms TimeCoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:39:24,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2320 states. [2021-07-13 20:39:24,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2320 to 1860. [2021-07-13 20:39:24,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1860 states, 1859 states have (on average 3.4023668639053253) internal successors, (6325), 1859 states have internal predecessors, (6325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:24,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1860 states to 1860 states and 6325 transitions. [2021-07-13 20:39:24,351 INFO L78 Accepts]: Start accepts. Automaton has 1860 states and 6325 transitions. Word has length 26 [2021-07-13 20:39:24,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:24,351 INFO L482 AbstractCegarLoop]: Abstraction has 1860 states and 6325 transitions. [2021-07-13 20:39:24,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:24,351 INFO L276 IsEmpty]: Start isEmpty. Operand 1860 states and 6325 transitions. [2021-07-13 20:39:24,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:39:24,354 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:24,354 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:39:24,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2508 [2021-07-13 20:39:24,570 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:24,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:24,570 INFO L82 PathProgramCache]: Analyzing trace with hash -716780640, now seen corresponding path program 38 times [2021-07-13 20:39:24,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:24,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934957456] [2021-07-13 20:39:24,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:24,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:24,919 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:24,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:24,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934957456] [2021-07-13 20:39:24,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934957456] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:24,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824204952] [2021-07-13 20:39:24,920 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 [2021-07-13 20:39:24,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:39:24,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:24,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:39:24,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:25,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:25,242 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:25,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:39:25,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:25,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:25,251 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:25,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-07-13 20:39:25,252 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:25,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:25,260 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:25,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-07-13 20:39:25,260 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:25,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:25,268 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:25,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:39:25,269 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:25,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:25,277 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:25,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:39:25,278 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:25,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:25,285 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:25,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:39:25,286 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:25,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:25,294 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:25,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:39:25,295 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:25,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:25,305 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:25,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:39:25,308 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:25,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:25,319 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:25,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-13 20:39:25,320 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:25,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:25,331 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:25,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:39:25,332 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:25,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:25,343 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:25,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:39:25,345 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:25,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:25,356 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:25,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:39:25,359 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:25,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:25,370 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:39:25,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:39:25,371 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:25,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:25,382 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:39:25,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:39:25,384 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:25,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:25,394 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:39:25,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-13 20:39:25,396 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:25,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:25,401 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:25,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:39:25,402 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:25,492 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:25,497 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:39:25,497 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:657, output treesize:174 [2021-07-13 20:39:25,698 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:25,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824204952] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:25,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:25,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-07-13 20:39:25,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025584227] [2021-07-13 20:39:25,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:39:25,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:25,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:39:25,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:39:25,699 INFO L87 Difference]: Start difference. First operand 1860 states and 6325 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:26,658 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2021-07-13 20:39:26,803 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2021-07-13 20:39:26,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:26,846 INFO L93 Difference]: Finished difference Result 2236 states and 7452 transitions. [2021-07-13 20:39:26,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:39:26,846 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:39:26,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:26,850 INFO L225 Difference]: With dead ends: 2236 [2021-07-13 20:39:26,850 INFO L226 Difference]: Without dead ends: 2207 [2021-07-13 20:39:26,851 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1485.2ms TimeCoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:39:26,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2207 states. [2021-07-13 20:39:26,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2207 to 1840. [2021-07-13 20:39:26,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1840 states, 1839 states have (on average 3.3953235454051116) internal successors, (6244), 1839 states have internal predecessors, (6244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:26,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1840 states to 1840 states and 6244 transitions. [2021-07-13 20:39:26,878 INFO L78 Accepts]: Start accepts. Automaton has 1840 states and 6244 transitions. Word has length 26 [2021-07-13 20:39:26,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:26,878 INFO L482 AbstractCegarLoop]: Abstraction has 1840 states and 6244 transitions. [2021-07-13 20:39:26,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:26,878 INFO L276 IsEmpty]: Start isEmpty. Operand 1840 states and 6244 transitions. [2021-07-13 20:39:26,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:39:26,881 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:26,881 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:39:27,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2542 [2021-07-13 20:39:27,098 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:27,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:27,098 INFO L82 PathProgramCache]: Analyzing trace with hash 794427266, now seen corresponding path program 39 times [2021-07-13 20:39:27,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:27,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386261081] [2021-07-13 20:39:27,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:27,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:27,353 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:27,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:27,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386261081] [2021-07-13 20:39:27,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386261081] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:27,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719824242] [2021-07-13 20:39:27,353 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 [2021-07-13 20:39:27,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:39:27,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:27,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:39:27,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:27,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:27,798 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:39:27,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-13 20:39:27,802 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:27,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:27,825 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:39:27,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-13 20:39:27,827 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:27,987 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-07-13 20:39:27,988 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:27,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:28,007 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:28,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-13 20:39:28,011 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:28,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:28,032 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:39:28,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-07-13 20:39:28,033 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:28,339 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2021-07-13 20:39:28,339 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.1 percent of original size [2021-07-13 20:39:28,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:28,357 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:28,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-13 20:39:28,362 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:28,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:28,379 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:39:28,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-13 20:39:28,381 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:28,520 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-07-13 20:39:28,520 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:28,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:28,537 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:28,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-07-13 20:39:28,543 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:28,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:28,559 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:39:28,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:39:28,561 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:28,812 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-07-13 20:39:28,813 INFO L628 ElimStorePlain]: treesize reduction 9, result has 96.5 percent of original size [2021-07-13 20:39:28,828 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:39:28,829 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:349, output treesize:259 [2021-07-13 20:39:29,024 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-07-13 20:39:29,121 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:29,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719824242] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:29,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:29,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-07-13 20:39:29,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92841832] [2021-07-13 20:39:29,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:39:29,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:29,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:39:29,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:39:29,122 INFO L87 Difference]: Start difference. First operand 1840 states and 6244 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:29,836 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-07-13 20:39:30,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:30,068 INFO L93 Difference]: Finished difference Result 2047 states and 6843 transitions. [2021-07-13 20:39:30,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:39:30,068 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:39:30,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:30,072 INFO L225 Difference]: With dead ends: 2047 [2021-07-13 20:39:30,072 INFO L226 Difference]: Without dead ends: 2022 [2021-07-13 20:39:30,072 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1277.6ms TimeCoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:39:30,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2022 states. [2021-07-13 20:39:30,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2022 to 1822. [2021-07-13 20:39:30,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1822 states, 1821 states have (on average 3.399231191652938) internal successors, (6190), 1821 states have internal predecessors, (6190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:30,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 6190 transitions. [2021-07-13 20:39:30,097 INFO L78 Accepts]: Start accepts. Automaton has 1822 states and 6190 transitions. Word has length 26 [2021-07-13 20:39:30,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:30,097 INFO L482 AbstractCegarLoop]: Abstraction has 1822 states and 6190 transitions. [2021-07-13 20:39:30,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:30,097 INFO L276 IsEmpty]: Start isEmpty. Operand 1822 states and 6190 transitions. [2021-07-13 20:39:30,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:39:30,099 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:30,099 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:39:30,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2581,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:30,315 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:30,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:30,316 INFO L82 PathProgramCache]: Analyzing trace with hash 827344434, now seen corresponding path program 40 times [2021-07-13 20:39:30,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:30,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68058014] [2021-07-13 20:39:30,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:30,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:30,692 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:30,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:30,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68058014] [2021-07-13 20:39:30,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68058014] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:30,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399595650] [2021-07-13 20:39:30,692 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 [2021-07-13 20:39:30,717 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:39:30,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:30,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:39:30,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:30,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:30,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:30,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:30,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:30,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:30,960 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:30,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:39:30,961 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:30,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:30,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:30,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:30,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:30,974 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:30,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 27 [2021-07-13 20:39:30,976 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:30,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:30,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:30,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:30,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:30,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:30,991 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:39:30,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-07-13 20:39:30,993 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:30,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:30,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:30,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:31,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:31,005 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:31,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:39:31,005 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:31,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:31,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:31,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:31,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:31,017 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:31,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:39:31,017 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:31,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:31,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:31,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:31,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:31,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:31,032 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:31,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 24 [2021-07-13 20:39:31,033 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:31,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:31,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:31,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:31,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:31,044 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:31,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:39:31,045 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:31,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:31,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:31,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:31,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:31,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:31,059 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:31,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-07-13 20:39:31,062 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:31,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:31,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:31,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:31,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:31,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:31,075 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:31,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:39:31,076 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:31,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:31,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:31,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:31,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:31,090 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:31,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 24 [2021-07-13 20:39:31,094 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:31,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:31,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:31,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:31,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:31,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:31,106 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:31,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:39:31,107 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:31,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:31,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:31,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:31,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:31,119 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:31,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-07-13 20:39:31,120 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:31,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:31,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:31,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:31,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:31,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:31,134 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:39:31,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-07-13 20:39:31,136 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:31,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:31,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:31,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:31,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:31,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:31,148 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:31,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:39:31,148 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:31,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:31,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:31,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:31,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:31,163 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:31,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 27 [2021-07-13 20:39:31,164 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:31,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:31,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:31,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:31,174 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:39:31,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 20 [2021-07-13 20:39:31,176 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:31,257 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:31,259 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:39:31,259 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:729, output treesize:181 [2021-07-13 20:39:31,450 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:31,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399595650] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:31,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:31,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-13 20:39:31,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810357793] [2021-07-13 20:39:31,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:39:31,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:31,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:39:31,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:39:31,451 INFO L87 Difference]: Start difference. First operand 1822 states and 6190 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:32,088 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 40 [2021-07-13 20:39:32,653 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2021-07-13 20:39:32,785 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2021-07-13 20:39:33,042 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-07-13 20:39:33,357 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2021-07-13 20:39:33,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:33,431 INFO L93 Difference]: Finished difference Result 2419 states and 8019 transitions. [2021-07-13 20:39:33,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:39:33,431 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:39:33,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:33,436 INFO L225 Difference]: With dead ends: 2419 [2021-07-13 20:39:33,436 INFO L226 Difference]: Without dead ends: 2400 [2021-07-13 20:39:33,437 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 2163.0ms TimeCoverageRelationStatistics Valid=210, Invalid=1050, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:39:33,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2400 states. [2021-07-13 20:39:33,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2400 to 1803. [2021-07-13 20:39:33,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1803 states, 1802 states have (on average 3.3990011098779136) internal successors, (6125), 1802 states have internal predecessors, (6125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:33,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1803 states to 1803 states and 6125 transitions. [2021-07-13 20:39:33,468 INFO L78 Accepts]: Start accepts. Automaton has 1803 states and 6125 transitions. Word has length 26 [2021-07-13 20:39:33,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:33,468 INFO L482 AbstractCegarLoop]: Abstraction has 1803 states and 6125 transitions. [2021-07-13 20:39:33,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:33,468 INFO L276 IsEmpty]: Start isEmpty. Operand 1803 states and 6125 transitions. [2021-07-13 20:39:33,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:39:33,471 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:33,471 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:39:33,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2637,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:33,685 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:33,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:33,685 INFO L82 PathProgramCache]: Analyzing trace with hash 305289786, now seen corresponding path program 41 times [2021-07-13 20:39:33,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:33,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829811730] [2021-07-13 20:39:33,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:33,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:34,082 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:34,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:34,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829811730] [2021-07-13 20:39:34,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829811730] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:34,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545451770] [2021-07-13 20:39:34,083 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 [2021-07-13 20:39:34,109 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:39:34,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:34,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:39:34,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:34,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:34,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:34,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:34,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:39:34,488 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:34,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:34,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:34,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:34,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:39:34,494 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:34,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:34,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:34,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:34,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:39:34,499 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:34,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:34,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:34,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:34,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:39:34,505 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:34,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:34,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:34,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:34,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:39:34,510 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:34,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:34,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:34,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:34,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:39:34,516 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:34,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:34,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:34,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:34,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-07-13 20:39:34,522 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:34,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:34,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:34,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:34,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-13 20:39:34,527 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:34,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:34,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:34,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:34,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:39:34,532 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:34,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:34,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:34,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:34,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:39:34,538 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:34,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:34,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:34,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:34,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-13 20:39:34,543 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:34,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:34,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:34,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:34,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:39:34,549 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:34,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:34,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:34,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:34,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:39:34,554 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:34,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:34,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:34,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:34,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:39:34,560 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:34,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:34,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:34,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:39:34,564 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:34,645 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-07-13 20:39:34,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:39:34,646 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-07-13 20:39:34,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:34,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545451770] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:34,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:34,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:39:34,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416649757] [2021-07-13 20:39:34,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:39:34,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:34,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:39:34,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:39:34,703 INFO L87 Difference]: Start difference. First operand 1803 states and 6125 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:35,277 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2021-07-13 20:39:35,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:35,580 INFO L93 Difference]: Finished difference Result 2310 states and 7688 transitions. [2021-07-13 20:39:35,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:39:35,580 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:39:35,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:35,584 INFO L225 Difference]: With dead ends: 2310 [2021-07-13 20:39:35,584 INFO L226 Difference]: Without dead ends: 2295 [2021-07-13 20:39:35,584 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1128.4ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:39:35,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2295 states. [2021-07-13 20:39:35,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2295 to 1848. [2021-07-13 20:39:35,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1848 states, 1847 states have (on average 3.394152680021657) internal successors, (6269), 1847 states have internal predecessors, (6269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:35,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1848 states to 1848 states and 6269 transitions. [2021-07-13 20:39:35,610 INFO L78 Accepts]: Start accepts. Automaton has 1848 states and 6269 transitions. Word has length 26 [2021-07-13 20:39:35,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:35,610 INFO L482 AbstractCegarLoop]: Abstraction has 1848 states and 6269 transitions. [2021-07-13 20:39:35,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:35,610 INFO L276 IsEmpty]: Start isEmpty. Operand 1848 states and 6269 transitions. [2021-07-13 20:39:35,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:39:35,613 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:35,613 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:39:35,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2662 [2021-07-13 20:39:35,814 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:35,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:35,815 INFO L82 PathProgramCache]: Analyzing trace with hash 137480694, now seen corresponding path program 42 times [2021-07-13 20:39:35,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:35,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907463568] [2021-07-13 20:39:35,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:35,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:36,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:36,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:36,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907463568] [2021-07-13 20:39:36,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907463568] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:36,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100200632] [2021-07-13 20:39:36,123 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 [2021-07-13 20:39:36,149 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:39:36,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:36,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:39:36,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:36,424 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:39:36,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:39:36,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:36,433 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:39:36,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:39:36,434 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:36,450 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:39:36,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-13 20:39:36,452 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:36,470 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:39:36,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:39:36,472 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:36,481 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:39:36,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:39:36,482 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:36,493 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:39:36,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 22 [2021-07-13 20:39:36,494 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:36,510 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:36,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-13 20:39:36,515 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:36,538 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:39:36,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-13 20:39:36,541 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:36,560 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:36,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-13 20:39:36,561 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:36,584 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:39:36,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-13 20:39:36,586 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:36,597 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:39:36,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:39:36,598 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:36,608 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:39:36,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 16 [2021-07-13 20:39:36,609 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:36,632 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:39:36,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-07-13 20:39:36,637 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:36,648 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:39:36,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:39:36,649 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:36,659 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:39:36,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:39:36,660 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:36,673 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:36,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-13 20:39:36,676 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:36,798 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-07-13 20:39:36,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:36,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:39:36,810 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:769, output treesize:357 [2021-07-13 20:39:37,046 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-07-13 20:39:37,281 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-07-13 20:39:37,401 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:37,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100200632] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:37,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:37,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-07-13 20:39:37,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114815956] [2021-07-13 20:39:37,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:39:37,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:37,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:39:37,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:39:37,402 INFO L87 Difference]: Start difference. First operand 1848 states and 6269 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:37,878 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2021-07-13 20:39:38,257 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2021-07-13 20:39:38,433 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 53 [2021-07-13 20:39:38,632 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-07-13 20:39:38,894 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 35 [2021-07-13 20:39:38,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:38,988 INFO L93 Difference]: Finished difference Result 2570 states and 8519 transitions. [2021-07-13 20:39:38,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:39:38,988 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:39:38,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:38,993 INFO L225 Difference]: With dead ends: 2570 [2021-07-13 20:39:38,993 INFO L226 Difference]: Without dead ends: 2555 [2021-07-13 20:39:38,993 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 2104.2ms TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:39:38,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2555 states. [2021-07-13 20:39:39,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2555 to 1848. [2021-07-13 20:39:39,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1848 states, 1847 states have (on average 3.394152680021657) internal successors, (6269), 1847 states have internal predecessors, (6269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:39,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1848 states to 1848 states and 6269 transitions. [2021-07-13 20:39:39,020 INFO L78 Accepts]: Start accepts. Automaton has 1848 states and 6269 transitions. Word has length 26 [2021-07-13 20:39:39,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:39,020 INFO L482 AbstractCegarLoop]: Abstraction has 1848 states and 6269 transitions. [2021-07-13 20:39:39,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:39,020 INFO L276 IsEmpty]: Start isEmpty. Operand 1848 states and 6269 transitions. [2021-07-13 20:39:39,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:39:39,022 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:39,023 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:39:39,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2690 [2021-07-13 20:39:39,231 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:39,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:39,231 INFO L82 PathProgramCache]: Analyzing trace with hash 436254142, now seen corresponding path program 43 times [2021-07-13 20:39:39,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:39,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236243852] [2021-07-13 20:39:39,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:39,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:39,479 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:39,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:39,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236243852] [2021-07-13 20:39:39,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236243852] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:39,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922581876] [2021-07-13 20:39:39,479 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 [2021-07-13 20:39:39,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:39,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:39:39,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:39,817 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_327, v_prenex_329], 3=[A, v_prenex_331]} [2021-07-13 20:39:39,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:39,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:39,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:39,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:39:39,826 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:39,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:39,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:39,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:39:39,832 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:39,981 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2021-07-13 20:39:39,982 INFO L628 ElimStorePlain]: treesize reduction 129, result has 54.9 percent of original size [2021-07-13 20:39:39,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:39,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:39,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:39,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:39:39,990 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:39,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:39,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:39,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:39:39,995 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:40,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:40,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:40,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 20:39:40,049 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:40,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:40,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:40,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:40,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-07-13 20:39:40,097 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:40,138 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:40,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:39:40,141 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:325, output treesize:51 [2021-07-13 20:39:40,201 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:40,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922581876] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:40,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:40,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-13 20:39:40,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820460766] [2021-07-13 20:39:40,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:39:40,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:40,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:39:40,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:39:40,204 INFO L87 Difference]: Start difference. First operand 1848 states and 6269 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:40,811 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2021-07-13 20:39:40,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:40,909 INFO L93 Difference]: Finished difference Result 2415 states and 7997 transitions. [2021-07-13 20:39:40,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:39:40,909 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:39:40,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:40,913 INFO L225 Difference]: With dead ends: 2415 [2021-07-13 20:39:40,913 INFO L226 Difference]: Without dead ends: 2385 [2021-07-13 20:39:40,913 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 983.9ms TimeCoverageRelationStatistics Valid=193, Invalid=677, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:39:40,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2385 states. [2021-07-13 20:39:40,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2385 to 1850. [2021-07-13 20:39:40,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1850 states, 1849 states have (on average 3.3958896700919414) internal successors, (6279), 1849 states have internal predecessors, (6279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:40,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1850 states to 1850 states and 6279 transitions. [2021-07-13 20:39:40,939 INFO L78 Accepts]: Start accepts. Automaton has 1850 states and 6279 transitions. Word has length 26 [2021-07-13 20:39:40,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:40,939 INFO L482 AbstractCegarLoop]: Abstraction has 1850 states and 6279 transitions. [2021-07-13 20:39:40,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:40,939 INFO L276 IsEmpty]: Start isEmpty. Operand 1850 states and 6279 transitions. [2021-07-13 20:39:40,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:39:40,942 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:40,942 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:39:41,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2741 [2021-07-13 20:39:41,157 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:41,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:41,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1514157122, now seen corresponding path program 44 times [2021-07-13 20:39:41,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:41,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832930592] [2021-07-13 20:39:41,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:41,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:41,498 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:41,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:41,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832930592] [2021-07-13 20:39:41,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832930592] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:41,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771317851] [2021-07-13 20:39:41,498 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 [2021-07-13 20:39:41,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:39:41,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:41,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:39:41,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:41,705 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-07-13 20:39:41,863 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2021-07-13 20:39:42,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:42,050 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:39:42,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-13 20:39:42,054 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:42,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:42,079 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:39:42,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-13 20:39:42,081 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:42,255 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-07-13 20:39:42,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:42,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:42,276 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:42,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-13 20:39:42,281 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:42,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:42,301 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:39:42,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-13 20:39:42,303 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:42,482 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-07-13 20:39:42,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:42,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:42,502 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:42,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-13 20:39:42,505 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:42,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:42,526 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:39:42,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-07-13 20:39:42,527 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:42,831 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2021-07-13 20:39:42,831 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.0 percent of original size [2021-07-13 20:39:42,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:42,849 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:42,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-07-13 20:39:42,856 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:42,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:42,873 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:39:42,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:39:42,875 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:43,134 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2021-07-13 20:39:43,134 INFO L628 ElimStorePlain]: treesize reduction 9, result has 96.7 percent of original size [2021-07-13 20:39:43,149 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:39:43,149 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:365, output treesize:256 [2021-07-13 20:39:43,328 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-07-13 20:39:43,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:43,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771317851] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:43,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:43,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-13 20:39:43,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807691024] [2021-07-13 20:39:43,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:39:43,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:43,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:39:43,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:39:43,415 INFO L87 Difference]: Start difference. First operand 1850 states and 6279 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:43,876 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2021-07-13 20:39:44,392 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-07-13 20:39:44,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:44,416 INFO L93 Difference]: Finished difference Result 2425 states and 8078 transitions. [2021-07-13 20:39:44,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:39:44,416 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:39:44,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:44,420 INFO L225 Difference]: With dead ends: 2425 [2021-07-13 20:39:44,420 INFO L226 Difference]: Without dead ends: 2410 [2021-07-13 20:39:44,421 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1562.1ms TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:39:44,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2410 states. [2021-07-13 20:39:44,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2410 to 1868. [2021-07-13 20:39:44,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1868 states, 1867 states have (on average 3.392072844134976) internal successors, (6333), 1867 states have internal predecessors, (6333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:44,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1868 states to 1868 states and 6333 transitions. [2021-07-13 20:39:44,447 INFO L78 Accepts]: Start accepts. Automaton has 1868 states and 6333 transitions. Word has length 26 [2021-07-13 20:39:44,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:44,447 INFO L482 AbstractCegarLoop]: Abstraction has 1868 states and 6333 transitions. [2021-07-13 20:39:44,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:44,447 INFO L276 IsEmpty]: Start isEmpty. Operand 1868 states and 6333 transitions. [2021-07-13 20:39:44,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:39:44,449 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:44,449 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:39:44,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2752,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:44,669 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:44,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:44,669 INFO L82 PathProgramCache]: Analyzing trace with hash -714815838, now seen corresponding path program 45 times [2021-07-13 20:39:44,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:44,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269894966] [2021-07-13 20:39:44,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:44,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:44,958 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:44,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:44,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269894966] [2021-07-13 20:39:44,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269894966] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:44,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093904359] [2021-07-13 20:39:44,959 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 [2021-07-13 20:39:44,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:39:44,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:44,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:39:44,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:45,416 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-07-13 20:39:45,654 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 55 [2021-07-13 20:39:45,724 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_349, v_prenex_347], 2=[A, v_prenex_348]} [2021-07-13 20:39:45,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:45,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:39:45,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:45,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:45,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-07-13 20:39:45,736 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:45,864 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2021-07-13 20:39:45,865 INFO L628 ElimStorePlain]: treesize reduction 114, result has 55.3 percent of original size [2021-07-13 20:39:45,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:45,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 20:39:45,870 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:45,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:45,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:45,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:45,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:45,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:39:45,939 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:45,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:45,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:45,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:39:45,943 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:45,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:45,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:45,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:45,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:39:45,986 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:46,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:46,024 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:39:46,024 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:285, output treesize:51 [2021-07-13 20:39:46,076 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:46,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093904359] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:46,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:46,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 20:39:46,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64692433] [2021-07-13 20:39:46,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:39:46,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:46,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:39:46,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:39:46,077 INFO L87 Difference]: Start difference. First operand 1868 states and 6333 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:46,930 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-07-13 20:39:47,163 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 61 [2021-07-13 20:39:47,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:47,273 INFO L93 Difference]: Finished difference Result 2321 states and 7745 transitions. [2021-07-13 20:39:47,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:39:47,274 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:39:47,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:47,278 INFO L225 Difference]: With dead ends: 2321 [2021-07-13 20:39:47,278 INFO L226 Difference]: Without dead ends: 2306 [2021-07-13 20:39:47,278 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1677.1ms TimeCoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:39:47,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2306 states. [2021-07-13 20:39:47,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2306 to 1889. [2021-07-13 20:39:47,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1889 states, 1888 states have (on average 3.3887711864406778) internal successors, (6398), 1888 states have internal predecessors, (6398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:47,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1889 states to 1889 states and 6398 transitions. [2021-07-13 20:39:47,305 INFO L78 Accepts]: Start accepts. Automaton has 1889 states and 6398 transitions. Word has length 26 [2021-07-13 20:39:47,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:47,305 INFO L482 AbstractCegarLoop]: Abstraction has 1889 states and 6398 transitions. [2021-07-13 20:39:47,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:47,305 INFO L276 IsEmpty]: Start isEmpty. Operand 1889 states and 6398 transitions. [2021-07-13 20:39:47,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:39:47,307 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:47,307 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:39:47,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2810 [2021-07-13 20:39:47,508 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:47,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:47,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1962618678, now seen corresponding path program 46 times [2021-07-13 20:39:47,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:47,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593624375] [2021-07-13 20:39:47,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:47,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:47,793 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:47,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:47,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593624375] [2021-07-13 20:39:47,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593624375] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:47,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277488062] [2021-07-13 20:39:47,793 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 [2021-07-13 20:39:47,820 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:39:47,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:47,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:39:47,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:48,217 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-07-13 20:39:48,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:48,281 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:48,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:39:48,285 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:48,487 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-07-13 20:39:48,488 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:48,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:48,499 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:48,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-13 20:39:48,501 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:48,604 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-07-13 20:39:48,605 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:48,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:48,617 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:39:48,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:39:48,618 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:48,717 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:48,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:48,728 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:48,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:39:48,729 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:48,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:48,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:48,838 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:39:48,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-13 20:39:48,839 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:48,932 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:48,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:48,943 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:39:48,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:39:48,944 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:49,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:49,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:49,046 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:49,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:39:49,048 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:49,134 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:49,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:49,143 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:49,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:39:49,146 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:49,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:49,232 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:39:49,233 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:325, output treesize:174 [2021-07-13 20:39:49,400 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:49,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277488062] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:49,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:49,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 20:39:49,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439476944] [2021-07-13 20:39:49,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:39:49,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:49,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:39:49,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:39:49,401 INFO L87 Difference]: Start difference. First operand 1889 states and 6398 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:50,112 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-07-13 20:39:50,452 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 79 [2021-07-13 20:39:50,755 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-07-13 20:39:50,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:50,955 INFO L93 Difference]: Finished difference Result 2617 states and 8667 transitions. [2021-07-13 20:39:50,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:39:50,956 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:39:50,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:50,960 INFO L225 Difference]: With dead ends: 2617 [2021-07-13 20:39:50,960 INFO L226 Difference]: Without dead ends: 2602 [2021-07-13 20:39:50,961 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 1847.1ms TimeCoverageRelationStatistics Valid=192, Invalid=678, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:39:50,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2602 states. [2021-07-13 20:39:50,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2602 to 1886. [2021-07-13 20:39:50,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1886 states, 1885 states have (on average 3.389920424403183) internal successors, (6390), 1885 states have internal predecessors, (6390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:50,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 6390 transitions. [2021-07-13 20:39:50,990 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 6390 transitions. Word has length 26 [2021-07-13 20:39:50,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:50,991 INFO L482 AbstractCegarLoop]: Abstraction has 1886 states and 6390 transitions. [2021-07-13 20:39:50,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:50,991 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 6390 transitions. [2021-07-13 20:39:50,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:39:50,995 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:50,995 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:39:51,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2825,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:51,210 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:51,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:51,211 INFO L82 PathProgramCache]: Analyzing trace with hash 272675774, now seen corresponding path program 47 times [2021-07-13 20:39:51,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:51,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365795549] [2021-07-13 20:39:51,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:51,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:51,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:51,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:51,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365795549] [2021-07-13 20:39:51,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365795549] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:51,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170737217] [2021-07-13 20:39:51,499 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 [2021-07-13 20:39:51,525 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:39:51,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:51,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:39:51,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:51,908 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-07-13 20:39:52,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:52,025 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:52,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:39:52,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:52,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:52,039 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:39:52,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:39:52,040 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:52,175 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-07-13 20:39:52,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:52,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:52,189 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:52,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-13 20:39:52,191 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:52,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:52,201 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:39:52,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:39:52,203 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:52,327 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-07-13 20:39:52,328 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:52,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:52,340 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:52,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:39:52,344 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:52,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:52,355 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:39:52,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-13 20:39:52,356 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:52,466 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-07-13 20:39:52,466 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:52,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:52,479 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:52,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:39:52,480 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:52,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:52,490 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:52,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:39:52,492 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:52,594 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-07-13 20:39:52,594 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:52,600 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:39:52,600 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:325, output treesize:174 [2021-07-13 20:39:52,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:52,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170737217] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:52,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:52,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 20:39:52,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580475933] [2021-07-13 20:39:52,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:39:52,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:52,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:39:52,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:39:52,790 INFO L87 Difference]: Start difference. First operand 1886 states and 6390 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:53,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:53,740 INFO L93 Difference]: Finished difference Result 2461 states and 8175 transitions. [2021-07-13 20:39:53,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:39:53,741 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:39:53,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:53,745 INFO L225 Difference]: With dead ends: 2461 [2021-07-13 20:39:53,745 INFO L226 Difference]: Without dead ends: 2436 [2021-07-13 20:39:53,745 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 1311.3ms TimeCoverageRelationStatistics Valid=173, Invalid=639, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:39:53,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2436 states. [2021-07-13 20:39:53,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2436 to 1886. [2021-07-13 20:39:53,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1886 states, 1885 states have (on average 3.3920424403183023) internal successors, (6394), 1885 states have internal predecessors, (6394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:53,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 6394 transitions. [2021-07-13 20:39:53,772 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 6394 transitions. Word has length 26 [2021-07-13 20:39:53,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:53,772 INFO L482 AbstractCegarLoop]: Abstraction has 1886 states and 6394 transitions. [2021-07-13 20:39:53,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:53,772 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 6394 transitions. [2021-07-13 20:39:53,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:39:53,774 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:53,775 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:39:53,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2842 [2021-07-13 20:39:53,986 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:53,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:53,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1537750790, now seen corresponding path program 48 times [2021-07-13 20:39:53,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:53,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69035506] [2021-07-13 20:39:53,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:53,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:54,370 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:54,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:54,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69035506] [2021-07-13 20:39:54,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69035506] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:54,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349427596] [2021-07-13 20:39:54,370 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 [2021-07-13 20:39:54,396 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:39:54,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:54,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:39:54,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:54,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:54,568 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:54,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:39:54,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:54,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:54,576 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:54,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:39:54,577 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:54,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:54,587 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:39:54,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:39:54,589 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:54,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:54,596 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:54,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:39:54,597 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:54,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:54,616 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:39:54,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:39:54,618 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:54,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:54,630 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:54,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:39:54,631 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:54,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:54,641 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:54,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:39:54,642 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:54,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:54,655 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:54,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-13 20:39:54,657 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:54,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:54,670 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:54,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:39:54,674 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:54,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:54,684 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:54,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-07-13 20:39:54,685 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:54,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:54,695 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:54,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-07-13 20:39:54,696 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:54,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:54,708 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:54,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:39:54,710 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:54,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:54,723 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:39:54,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-13 20:39:54,725 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:54,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:54,734 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:54,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:39:54,738 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:54,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:54,745 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:54,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:39:54,746 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:54,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:54,751 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:54,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:39:54,751 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:54,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:54,819 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:39:54,819 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-07-13 20:39:55,025 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:55,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349427596] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:55,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:55,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-13 20:39:55,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693394292] [2021-07-13 20:39:55,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:39:55,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:55,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:39:55,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:39:55,026 INFO L87 Difference]: Start difference. First operand 1886 states and 6394 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:55,800 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-07-13 20:39:55,978 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-07-13 20:39:56,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:56,034 INFO L93 Difference]: Finished difference Result 2412 states and 8043 transitions. [2021-07-13 20:39:56,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:39:56,034 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:39:56,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:56,039 INFO L225 Difference]: With dead ends: 2412 [2021-07-13 20:39:56,039 INFO L226 Difference]: Without dead ends: 2397 [2021-07-13 20:39:56,039 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1332.8ms TimeCoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:39:56,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2397 states. [2021-07-13 20:39:56,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2397 to 1886. [2021-07-13 20:39:56,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1886 states, 1885 states have (on average 3.3920424403183023) internal successors, (6394), 1885 states have internal predecessors, (6394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:56,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 6394 transitions. [2021-07-13 20:39:56,065 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 6394 transitions. Word has length 26 [2021-07-13 20:39:56,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:56,065 INFO L482 AbstractCegarLoop]: Abstraction has 1886 states and 6394 transitions. [2021-07-13 20:39:56,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:56,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 6394 transitions. [2021-07-13 20:39:56,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:39:56,068 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:56,068 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:39:56,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2875,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:56,281 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:56,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:56,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1872442310, now seen corresponding path program 55 times [2021-07-13 20:39:56,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:56,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508575925] [2021-07-13 20:39:56,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:56,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:56,633 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:56,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:56,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508575925] [2021-07-13 20:39:56,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508575925] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:56,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191600207] [2021-07-13 20:39:56,633 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 [2021-07-13 20:39:56,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:56,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:39:56,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:57,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:57,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-13 20:39:57,086 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:57,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:57,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-13 20:39:57,093 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:57,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:57,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-13 20:39:57,101 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:57,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:57,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:39:57,108 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:57,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:57,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-13 20:39:57,115 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:57,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:57,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-07-13 20:39:57,123 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:57,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:57,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-13 20:39:57,130 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:57,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:57,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:39:57,137 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:57,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:57,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-13 20:39:57,145 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:57,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:57,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-07-13 20:39:57,152 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:57,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:57,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-07-13 20:39:57,160 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:57,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:57,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:39:57,168 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:57,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:57,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-13 20:39:57,175 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:57,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:57,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:39:57,183 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:57,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:57,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-07-13 20:39:57,187 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:57,213 INFO L628 ElimStorePlain]: treesize reduction 32, result has 45.8 percent of original size [2021-07-13 20:39:57,214 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:39:57,214 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-07-13 20:39:57,243 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:57,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191600207] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:57,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:57,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-07-13 20:39:57,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110581058] [2021-07-13 20:39:57,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:39:57,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:57,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:39:57,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:39:57,244 INFO L87 Difference]: Start difference. First operand 1886 states and 6394 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:57,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:57,946 INFO L93 Difference]: Finished difference Result 2181 states and 7107 transitions. [2021-07-13 20:39:57,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:39:57,946 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:39:57,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:57,950 INFO L225 Difference]: With dead ends: 2181 [2021-07-13 20:39:57,950 INFO L226 Difference]: Without dead ends: 2144 [2021-07-13 20:39:57,951 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 948.8ms TimeCoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:39:57,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2144 states. [2021-07-13 20:39:57,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2144 to 1906. [2021-07-13 20:39:57,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1906 states, 1905 states have (on average 3.391076115485564) internal successors, (6460), 1905 states have internal predecessors, (6460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:57,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1906 states to 1906 states and 6460 transitions. [2021-07-13 20:39:57,980 INFO L78 Accepts]: Start accepts. Automaton has 1906 states and 6460 transitions. Word has length 26 [2021-07-13 20:39:57,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:57,980 INFO L482 AbstractCegarLoop]: Abstraction has 1906 states and 6460 transitions. [2021-07-13 20:39:57,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:57,980 INFO L276 IsEmpty]: Start isEmpty. Operand 1906 states and 6460 transitions. [2021-07-13 20:39:57,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:39:57,983 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:57,983 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:39:58,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2892 [2021-07-13 20:39:58,199 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:58,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:58,199 INFO L82 PathProgramCache]: Analyzing trace with hash -804567746, now seen corresponding path program 56 times [2021-07-13 20:39:58,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:58,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206303621] [2021-07-13 20:39:58,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:58,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:58,534 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:58,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:58,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206303621] [2021-07-13 20:39:58,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206303621] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:58,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144720634] [2021-07-13 20:39:58,534 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 [2021-07-13 20:39:58,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:39:58,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:58,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:39:58,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:58,822 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-07-13 20:39:58,869 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_376, v_prenex_378], 6=[A, v_prenex_374]} [2021-07-13 20:39:58,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:58,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:58,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:58,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:58,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 7 [2021-07-13 20:39:58,879 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:58,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:58,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:58,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:58,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-13 20:39:58,886 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:58,994 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2021-07-13 20:39:58,994 INFO L628 ElimStorePlain]: treesize reduction 156, result has 44.9 percent of original size [2021-07-13 20:39:58,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:58,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:58,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:39:59,000 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:59,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:59,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:59,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:59,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:59,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-13 20:39:59,042 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:59,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:59,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:59,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:59,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:59,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:59,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-13 20:39:59,081 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:59,109 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:59,111 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 20:39:59,111 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:341, output treesize:41 [2021-07-13 20:39:59,158 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:59,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144720634] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:59,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:59,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-07-13 20:39:59,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997170257] [2021-07-13 20:39:59,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:39:59,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:59,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:39:59,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:39:59,159 INFO L87 Difference]: Start difference. First operand 1906 states and 6460 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:00,052 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-07-13 20:40:00,198 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2021-07-13 20:40:00,334 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-07-13 20:40:00,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:00,441 INFO L93 Difference]: Finished difference Result 2358 states and 7788 transitions. [2021-07-13 20:40:00,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:40:00,441 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:40:00,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:00,445 INFO L225 Difference]: With dead ends: 2358 [2021-07-13 20:40:00,446 INFO L226 Difference]: Without dead ends: 2312 [2021-07-13 20:40:00,446 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 1519.5ms TimeCoverageRelationStatistics Valid=252, Invalid=870, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:40:00,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2312 states. [2021-07-13 20:40:00,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2312 to 1906. [2021-07-13 20:40:00,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1906 states, 1905 states have (on average 3.3858267716535435) internal successors, (6450), 1905 states have internal predecessors, (6450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:00,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1906 states to 1906 states and 6450 transitions. [2021-07-13 20:40:00,471 INFO L78 Accepts]: Start accepts. Automaton has 1906 states and 6450 transitions. Word has length 26 [2021-07-13 20:40:00,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:00,471 INFO L482 AbstractCegarLoop]: Abstraction has 1906 states and 6450 transitions. [2021-07-13 20:40:00,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:00,472 INFO L276 IsEmpty]: Start isEmpty. Operand 1906 states and 6450 transitions. [2021-07-13 20:40:00,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:40:00,474 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:00,474 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:40:00,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2988 [2021-07-13 20:40:00,675 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:00,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:00,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1833133118, now seen corresponding path program 57 times [2021-07-13 20:40:00,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:00,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907253447] [2021-07-13 20:40:00,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:00,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:01,032 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:01,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:01,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907253447] [2021-07-13 20:40:01,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907253447] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:01,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024532362] [2021-07-13 20:40:01,032 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 [2021-07-13 20:40:01,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:40:01,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:01,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:40:01,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:01,422 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-07-13 20:40:01,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:01,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:01,680 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-07-13 20:40:01,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 28 [2021-07-13 20:40:01,681 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:01,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:01,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:01,709 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-13 20:40:01,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 35 [2021-07-13 20:40:01,711 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:02,063 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2021-07-13 20:40:02,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:02,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:02,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:02,100 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-13 20:40:02,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 35 [2021-07-13 20:40:02,103 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:02,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:02,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:02,127 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-07-13 20:40:02,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 25 [2021-07-13 20:40:02,128 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:02,497 WARN L205 SmtUtils]: Spent 356.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2021-07-13 20:40:02,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:02,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:02,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:02,532 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-07-13 20:40:02,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2021-07-13 20:40:02,536 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:02,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:02,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:02,573 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-07-13 20:40:02,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 43 [2021-07-13 20:40:02,577 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:02,906 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2021-07-13 20:40:02,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:02,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:02,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:02,936 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-07-13 20:40:02,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 26 [2021-07-13 20:40:02,938 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:02,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:02,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:02,961 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:02,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-07-13 20:40:02,968 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:03,296 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-07-13 20:40:03,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:03,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:03,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:03,332 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-13 20:40:03,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 35 [2021-07-13 20:40:03,333 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:03,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:03,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:03,360 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:03,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 47 [2021-07-13 20:40:03,365 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:03,929 WARN L205 SmtUtils]: Spent 562.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 122 [2021-07-13 20:40:03,929 INFO L628 ElimStorePlain]: treesize reduction 33, result has 94.4 percent of original size [2021-07-13 20:40:03,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:03,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:03,962 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-13 20:40:03,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-07-13 20:40:03,966 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:03,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:03,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:03,980 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:40:03,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-07-13 20:40:03,981 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:04,228 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-07-13 20:40:04,229 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:04,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:04,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:04,261 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-13 20:40:04,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 35 [2021-07-13 20:40:04,264 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:04,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:04,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:04,285 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-07-13 20:40:04,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 28 [2021-07-13 20:40:04,286 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:04,540 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-07-13 20:40:04,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:04,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:04,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:04,572 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-13 20:40:04,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 35 [2021-07-13 20:40:04,576 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:04,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:04,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:04,589 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:40:04,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-07-13 20:40:04,589 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:04,773 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-07-13 20:40:04,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:04,785 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-07-13 20:40:04,785 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:801, output treesize:340 [2021-07-13 20:40:04,912 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 24 [2021-07-13 20:40:04,955 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:04,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024532362] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:04,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:04,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-13 20:40:04,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295175535] [2021-07-13 20:40:04,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:40:04,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:04,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:40:04,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:40:04,956 INFO L87 Difference]: Start difference. First operand 1906 states and 6450 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:06,055 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-07-13 20:40:06,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:06,370 INFO L93 Difference]: Finished difference Result 2168 states and 7234 transitions. [2021-07-13 20:40:06,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:40:06,370 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:40:06,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:06,374 INFO L225 Difference]: With dead ends: 2168 [2021-07-13 20:40:06,374 INFO L226 Difference]: Without dead ends: 2153 [2021-07-13 20:40:06,374 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 1608.5ms TimeCoverageRelationStatistics Valid=209, Invalid=981, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:40:06,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2153 states. [2021-07-13 20:40:06,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2153 to 1921. [2021-07-13 20:40:06,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1921 states, 1920 states have (on average 3.3921875) internal successors, (6513), 1920 states have internal predecessors, (6513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:06,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1921 states to 1921 states and 6513 transitions. [2021-07-13 20:40:06,399 INFO L78 Accepts]: Start accepts. Automaton has 1921 states and 6513 transitions. Word has length 26 [2021-07-13 20:40:06,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:06,399 INFO L482 AbstractCegarLoop]: Abstraction has 1921 states and 6513 transitions. [2021-07-13 20:40:06,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:06,399 INFO L276 IsEmpty]: Start isEmpty. Operand 1921 states and 6513 transitions. [2021-07-13 20:40:06,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:40:06,423 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:06,423 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:40:06,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3002,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:40:06,638 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:06,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:06,639 INFO L82 PathProgramCache]: Analyzing trace with hash 179857598, now seen corresponding path program 49 times [2021-07-13 20:40:06,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:06,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976955501] [2021-07-13 20:40:06,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:06,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:07,091 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:07,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:07,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976955501] [2021-07-13 20:40:07,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976955501] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:07,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48016088] [2021-07-13 20:40:07,092 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 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 [2021-07-13 20:40:07,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:07,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:40:07,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:07,397 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-07-13 20:40:07,578 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-07-13 20:40:07,938 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 56 [2021-07-13 20:40:07,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:07,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:07,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:07,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:40:07,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:07,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:07,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:07,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:40:07,995 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:08,156 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-07-13 20:40:08,157 INFO L628 ElimStorePlain]: treesize reduction 44, result has 75.1 percent of original size [2021-07-13 20:40:08,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:08,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:40:08,162 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:08,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:08,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:08,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:08,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:08,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:40:08,225 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:08,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:08,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:08,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:40:08,230 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:08,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:08,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:40:08,279 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 9 variables, input treesize:215, output treesize:51 [2021-07-13 20:40:08,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:08,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48016088] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:08,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:08,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:40:08,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784852692] [2021-07-13 20:40:08,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:40:08,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:08,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:40:08,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:40:08,337 INFO L87 Difference]: Start difference. First operand 1921 states and 6513 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:08,989 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2021-07-13 20:40:09,651 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 73 [2021-07-13 20:40:10,109 WARN L205 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 75 [2021-07-13 20:40:10,746 WARN L205 SmtUtils]: Spent 560.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 87 [2021-07-13 20:40:11,259 WARN L205 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 92 [2021-07-13 20:40:11,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:11,485 INFO L93 Difference]: Finished difference Result 2468 states and 8139 transitions. [2021-07-13 20:40:11,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:40:11,485 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:40:11,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:11,490 INFO L225 Difference]: With dead ends: 2468 [2021-07-13 20:40:11,490 INFO L226 Difference]: Without dead ends: 2453 [2021-07-13 20:40:11,490 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 3689.2ms TimeCoverageRelationStatistics Valid=237, Invalid=819, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:40:11,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2453 states. [2021-07-13 20:40:11,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2453 to 1932. [2021-07-13 20:40:11,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1932 states, 1931 states have (on average 3.392542723977214) internal successors, (6551), 1931 states have internal predecessors, (6551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:11,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1932 states to 1932 states and 6551 transitions. [2021-07-13 20:40:11,518 INFO L78 Accepts]: Start accepts. Automaton has 1932 states and 6551 transitions. Word has length 26 [2021-07-13 20:40:11,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:11,518 INFO L482 AbstractCegarLoop]: Abstraction has 1932 states and 6551 transitions. [2021-07-13 20:40:11,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:11,518 INFO L276 IsEmpty]: Start isEmpty. Operand 1932 states and 6551 transitions. [2021-07-13 20:40:11,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:40:11,521 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:11,521 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:40:11,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3067 [2021-07-13 20:40:11,736 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:11,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:11,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1730239162, now seen corresponding path program 58 times [2021-07-13 20:40:11,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:11,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823968097] [2021-07-13 20:40:11,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:11,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:12,025 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:12,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:12,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823968097] [2021-07-13 20:40:12,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823968097] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:12,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948833839] [2021-07-13 20:40:12,026 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 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 [2021-07-13 20:40:12,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:40:12,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:12,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:40:12,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:12,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:12,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:12,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:12,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:12,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:12,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-13 20:40:12,587 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:12,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:12,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:12,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:12,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:12,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:12,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-13 20:40:12,594 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:12,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:12,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:12,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:12,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:12,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:12,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-07-13 20:40:12,602 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:12,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:12,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:12,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:12,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:12,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:12,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-13 20:40:12,610 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:12,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:12,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:12,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:12,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:12,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:12,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:40:12,618 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:12,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:12,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:12,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:12,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:12,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:12,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-13 20:40:12,625 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:12,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:12,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:12,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:12,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:12,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:12,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-13 20:40:12,633 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:12,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:12,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:12,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:12,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:12,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:12,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-13 20:40:12,640 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:12,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:12,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:12,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:12,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:12,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:12,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-07-13 20:40:12,648 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:12,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:12,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:12,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:12,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:12,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:12,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:40:12,655 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:12,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:12,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:12,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:12,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:12,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:12,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:40:12,663 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:12,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:12,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:12,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:12,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:12,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:12,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-13 20:40:12,670 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:12,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:12,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:12,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:12,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:12,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:12,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-07-13 20:40:12,677 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:12,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:12,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:12,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:12,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:12,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:12,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-07-13 20:40:12,684 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:12,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:12,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:12,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:12,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:40:12,688 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:12,713 INFO L628 ElimStorePlain]: treesize reduction 32, result has 45.8 percent of original size [2021-07-13 20:40:12,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:40:12,714 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-07-13 20:40:12,730 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:12,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948833839] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:12,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:12,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-13 20:40:12,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57454937] [2021-07-13 20:40:12,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:40:12,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:12,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:40:12,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:40:12,731 INFO L87 Difference]: Start difference. First operand 1932 states and 6551 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:13,126 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2021-07-13 20:40:13,362 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-07-13 20:40:13,603 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2021-07-13 20:40:13,927 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-07-13 20:40:14,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:14,232 INFO L93 Difference]: Finished difference Result 2505 states and 8099 transitions. [2021-07-13 20:40:14,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:40:14,232 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:40:14,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:14,237 INFO L225 Difference]: With dead ends: 2505 [2021-07-13 20:40:14,237 INFO L226 Difference]: Without dead ends: 2483 [2021-07-13 20:40:14,237 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 1573.5ms TimeCoverageRelationStatistics Valid=221, Invalid=901, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:40:14,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2483 states. [2021-07-13 20:40:14,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2483 to 1948. [2021-07-13 20:40:14,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1948 states, 1947 states have (on average 3.3954802259887007) internal successors, (6611), 1947 states have internal predecessors, (6611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:14,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1948 states to 1948 states and 6611 transitions. [2021-07-13 20:40:14,268 INFO L78 Accepts]: Start accepts. Automaton has 1948 states and 6611 transitions. Word has length 26 [2021-07-13 20:40:14,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:14,268 INFO L482 AbstractCegarLoop]: Abstraction has 1948 states and 6611 transitions. [2021-07-13 20:40:14,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:14,268 INFO L276 IsEmpty]: Start isEmpty. Operand 1948 states and 6611 transitions. [2021-07-13 20:40:14,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:40:14,271 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:14,271 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:40:14,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3079,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:40:14,485 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:14,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:14,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1769727974, now seen corresponding path program 50 times [2021-07-13 20:40:14,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:14,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90643109] [2021-07-13 20:40:14,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:14,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:14,915 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:14,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:14,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90643109] [2021-07-13 20:40:14,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90643109] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:14,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500165323] [2021-07-13 20:40:14,915 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 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 [2021-07-13 20:40:14,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:40:14,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:14,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:40:14,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:15,401 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-07-13 20:40:15,685 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-07-13 20:40:15,821 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_421, v_prenex_422, v_prenex_425], 6=[v_prenex_426, A, v_prenex_420, v_prenex_423, v_prenex_424]} [2021-07-13 20:40:15,900 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:15,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-13 20:40:15,903 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:16,293 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 136 [2021-07-13 20:40:16,293 INFO L628 ElimStorePlain]: treesize reduction 307, result has 56.1 percent of original size [2021-07-13 20:40:16,312 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:16,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-13 20:40:16,314 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:16,470 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-07-13 20:40:16,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:16,493 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:40:16,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-13 20:40:16,495 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:16,652 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-07-13 20:40:16,652 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:16,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:16,671 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:16,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 28 [2021-07-13 20:40:16,677 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:16,827 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-07-13 20:40:16,827 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:16,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:16,851 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-13 20:40:16,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 27 [2021-07-13 20:40:16,855 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:17,001 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-07-13 20:40:17,002 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:17,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:17,022 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-07-13 20:40:17,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 23 [2021-07-13 20:40:17,024 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:17,166 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-07-13 20:40:17,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:17,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:17,188 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-13 20:40:17,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 30 [2021-07-13 20:40:17,192 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:17,328 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-07-13 20:40:17,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:17,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:17,348 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-07-13 20:40:17,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 26 [2021-07-13 20:40:17,350 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:17,484 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-07-13 20:40:17,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:17,496 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:40:17,497 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:706, output treesize:429 [2021-07-13 20:40:17,741 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2021-07-13 20:40:17,884 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:17,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500165323] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:17,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:17,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-07-13 20:40:17,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491119410] [2021-07-13 20:40:17,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:40:17,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:17,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:40:17,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:40:17,885 INFO L87 Difference]: Start difference. First operand 1948 states and 6611 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:18,437 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2021-07-13 20:40:18,812 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 63 [2021-07-13 20:40:19,361 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 81 [2021-07-13 20:40:19,631 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-07-13 20:40:20,376 WARN L205 SmtUtils]: Spent 688.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 96 [2021-07-13 20:40:21,241 WARN L205 SmtUtils]: Spent 673.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 95 [2021-07-13 20:40:22,089 WARN L205 SmtUtils]: Spent 797.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 95 [2021-07-13 20:40:22,671 WARN L205 SmtUtils]: Spent 528.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 105 [2021-07-13 20:40:23,644 WARN L205 SmtUtils]: Spent 832.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 111 [2021-07-13 20:40:24,165 WARN L205 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 84 [2021-07-13 20:40:24,852 WARN L205 SmtUtils]: Spent 631.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 101 [2021-07-13 20:40:25,103 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-07-13 20:40:25,324 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 33 [2021-07-13 20:40:25,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:25,599 INFO L93 Difference]: Finished difference Result 2657 states and 8685 transitions. [2021-07-13 20:40:25,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:40:25,600 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:40:25,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:25,604 INFO L225 Difference]: With dead ends: 2657 [2021-07-13 20:40:25,605 INFO L226 Difference]: Without dead ends: 2642 [2021-07-13 20:40:25,605 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 7855.2ms TimeCoverageRelationStatistics Valid=257, Invalid=1303, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:40:25,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2642 states. [2021-07-13 20:40:25,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2642 to 1952. [2021-07-13 20:40:25,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1952 states, 1951 states have (on average 3.3956945156330085) internal successors, (6625), 1951 states have internal predecessors, (6625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:25,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1952 states to 1952 states and 6625 transitions. [2021-07-13 20:40:25,633 INFO L78 Accepts]: Start accepts. Automaton has 1952 states and 6625 transitions. Word has length 26 [2021-07-13 20:40:25,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:25,634 INFO L482 AbstractCegarLoop]: Abstraction has 1952 states and 6625 transitions. [2021-07-13 20:40:25,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:25,634 INFO L276 IsEmpty]: Start isEmpty. Operand 1952 states and 6625 transitions. [2021-07-13 20:40:25,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:40:25,636 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:25,636 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:40:25,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3193,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:40:25,852 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:25,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:25,853 INFO L82 PathProgramCache]: Analyzing trace with hash 152195194, now seen corresponding path program 51 times [2021-07-13 20:40:25,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:25,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824340583] [2021-07-13 20:40:25,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:25,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:26,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:26,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:26,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824340583] [2021-07-13 20:40:26,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824340583] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:26,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148689265] [2021-07-13 20:40:26,176 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 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 [2021-07-13 20:40:26,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:40:26,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:26,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:40:26,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:26,554 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-07-13 20:40:26,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:26,609 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:26,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:40:26,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:26,729 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-07-13 20:40:26,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:26,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:26,743 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:40:26,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-13 20:40:26,745 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:26,855 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-07-13 20:40:26,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:26,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:26,869 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:26,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:40:26,872 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:26,977 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-07-13 20:40:26,978 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:26,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:26,991 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:40:26,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:40:26,993 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:27,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:27,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:27,104 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:27,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-13 20:40:27,106 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:27,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:27,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:27,218 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:27,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:40:27,220 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:27,318 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:27,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:27,329 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:27,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:40:27,330 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:27,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:27,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:27,439 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:40:27,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:40:27,441 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:27,535 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:27,541 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:40:27,542 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:325, output treesize:174 [2021-07-13 20:40:27,732 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:27,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148689265] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:27,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:27,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:40:27,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068609046] [2021-07-13 20:40:27,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:40:27,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:27,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:40:27,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:40:27,734 INFO L87 Difference]: Start difference. First operand 1952 states and 6625 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:28,855 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2021-07-13 20:40:29,152 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-07-13 20:40:29,293 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2021-07-13 20:40:29,652 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2021-07-13 20:40:29,903 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 71 [2021-07-13 20:40:30,121 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-07-13 20:40:30,354 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 43 [2021-07-13 20:40:30,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:30,509 INFO L93 Difference]: Finished difference Result 2972 states and 9683 transitions. [2021-07-13 20:40:30,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:40:30,509 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:40:30,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:30,514 INFO L225 Difference]: With dead ends: 2972 [2021-07-13 20:40:30,514 INFO L226 Difference]: Without dead ends: 2942 [2021-07-13 20:40:30,515 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 2810.4ms TimeCoverageRelationStatistics Valid=309, Invalid=1023, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:40:30,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2942 states. [2021-07-13 20:40:30,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2942 to 1949. [2021-07-13 20:40:30,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1949 states, 1948 states have (on average 3.3983572895277208) internal successors, (6620), 1948 states have internal predecessors, (6620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:30,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1949 states to 1949 states and 6620 transitions. [2021-07-13 20:40:30,549 INFO L78 Accepts]: Start accepts. Automaton has 1949 states and 6620 transitions. Word has length 26 [2021-07-13 20:40:30,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:30,549 INFO L482 AbstractCegarLoop]: Abstraction has 1949 states and 6620 transitions. [2021-07-13 20:40:30,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:30,549 INFO L276 IsEmpty]: Start isEmpty. Operand 1949 states and 6620 transitions. [2021-07-13 20:40:30,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:40:30,552 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:30,552 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:40:30,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3230 [2021-07-13 20:40:30,768 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:30,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:30,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1956232686, now seen corresponding path program 59 times [2021-07-13 20:40:30,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:30,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950361829] [2021-07-13 20:40:30,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:30,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:31,044 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:31,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:31,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950361829] [2021-07-13 20:40:31,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950361829] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:31,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146813184] [2021-07-13 20:40:31,044 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 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 [2021-07-13 20:40:31,070 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:40:31,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:31,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:40:31,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:31,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:31,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:31,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:31,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:31,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:31,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:31,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-13 20:40:31,571 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:31,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:31,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:31,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:31,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:31,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:31,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:31,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-07-13 20:40:31,580 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:31,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:31,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:31,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:31,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:31,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:31,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:31,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-13 20:40:31,588 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:31,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:31,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:31,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:31,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:31,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:31,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:31,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-13 20:40:31,598 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:31,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:31,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:31,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:31,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:31,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:31,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:31,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-13 20:40:31,607 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:31,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:31,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:31,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:31,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:31,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:31,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:31,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-07-13 20:40:31,616 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:31,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:31,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:31,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:31,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:31,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:31,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:31,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:40:31,625 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:31,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:31,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:31,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:31,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:31,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:31,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:31,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:40:31,634 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:31,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:31,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:31,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:31,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:31,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:31,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:31,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:40:31,657 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:31,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:31,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:31,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:31,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:31,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:31,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:31,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-13 20:40:31,666 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:31,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:31,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:31,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:31,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:31,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:31,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:31,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-13 20:40:31,674 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:31,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:31,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:31,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:31,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:31,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:31,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:31,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-07-13 20:40:31,683 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:31,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:31,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:31,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:31,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:31,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:31,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:31,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:40:31,691 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:31,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:31,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:31,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:31,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:31,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:31,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:31,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-13 20:40:31,699 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:31,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:31,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:31,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:31,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:31,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-07-13 20:40:31,704 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:31,729 INFO L628 ElimStorePlain]: treesize reduction 16, result has 62.8 percent of original size [2021-07-13 20:40:31,730 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:40:31,730 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-07-13 20:40:31,763 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:31,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146813184] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:31,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:31,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 20:40:31,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012013664] [2021-07-13 20:40:31,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:40:31,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:31,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:40:31,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:40:31,764 INFO L87 Difference]: Start difference. First operand 1949 states and 6620 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:32,642 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-07-13 20:40:33,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:33,083 INFO L93 Difference]: Finished difference Result 3403 states and 10936 transitions. [2021-07-13 20:40:33,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:40:33,084 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:40:33,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:33,089 INFO L225 Difference]: With dead ends: 3403 [2021-07-13 20:40:33,090 INFO L226 Difference]: Without dead ends: 3373 [2021-07-13 20:40:33,090 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 1371.2ms TimeCoverageRelationStatistics Valid=313, Invalid=1327, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:40:33,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3373 states. [2021-07-13 20:40:33,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3373 to 2041. [2021-07-13 20:40:33,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2041 states, 2040 states have (on average 3.4073529411764705) internal successors, (6951), 2040 states have internal predecessors, (6951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:33,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2041 states to 2041 states and 6951 transitions. [2021-07-13 20:40:33,126 INFO L78 Accepts]: Start accepts. Automaton has 2041 states and 6951 transitions. Word has length 26 [2021-07-13 20:40:33,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:33,127 INFO L482 AbstractCegarLoop]: Abstraction has 2041 states and 6951 transitions. [2021-07-13 20:40:33,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:33,127 INFO L276 IsEmpty]: Start isEmpty. Operand 2041 states and 6951 transitions. [2021-07-13 20:40:33,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:40:33,129 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:33,129 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:40:33,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3245,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:40:33,333 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:33,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:33,333 INFO L82 PathProgramCache]: Analyzing trace with hash -505085958, now seen corresponding path program 60 times [2021-07-13 20:40:33,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:33,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414224410] [2021-07-13 20:40:33,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:33,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:33,593 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:33,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:33,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414224410] [2021-07-13 20:40:33,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414224410] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:33,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907548200] [2021-07-13 20:40:33,594 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 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 [2021-07-13 20:40:33,620 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:40:33,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:33,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:40:33,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:34,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:34,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:34,160 INFO L354 Elim1Store]: treesize reduction 18, result has 56.1 percent of original size [2021-07-13 20:40:34,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 41 [2021-07-13 20:40:34,163 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:34,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:34,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:34,198 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:34,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 59 [2021-07-13 20:40:34,207 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:34,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:34,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:34,243 INFO L354 Elim1Store]: treesize reduction 18, result has 56.1 percent of original size [2021-07-13 20:40:34,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 38 [2021-07-13 20:40:34,247 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:34,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:34,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:34,268 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-13 20:40:34,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 1 [2021-07-13 20:40:34,269 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:34,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:34,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:34,301 INFO L354 Elim1Store]: treesize reduction 31, result has 24.4 percent of original size [2021-07-13 20:40:34,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 28 [2021-07-13 20:40:34,303 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:34,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:34,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:34,322 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-13 20:40:34,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 1 [2021-07-13 20:40:34,323 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:34,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:34,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:34,356 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:34,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2021-07-13 20:40:34,365 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:34,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:34,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:34,386 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-13 20:40:34,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 1 [2021-07-13 20:40:34,387 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:34,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:34,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:34,423 INFO L354 Elim1Store]: treesize reduction 18, result has 56.1 percent of original size [2021-07-13 20:40:34,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 30 treesize of output 38 [2021-07-13 20:40:34,428 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:34,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:34,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:34,448 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-13 20:40:34,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 1 [2021-07-13 20:40:34,449 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:34,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:34,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:34,480 INFO L354 Elim1Store]: treesize reduction 31, result has 24.4 percent of original size [2021-07-13 20:40:34,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 25 [2021-07-13 20:40:34,481 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:34,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:34,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:34,502 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-13 20:40:34,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 1 [2021-07-13 20:40:34,503 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:34,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:34,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:34,533 INFO L354 Elim1Store]: treesize reduction 31, result has 24.4 percent of original size [2021-07-13 20:40:34,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 25 [2021-07-13 20:40:34,534 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:34,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:34,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:34,555 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-13 20:40:34,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 1 [2021-07-13 20:40:34,555 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:34,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:34,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:34,575 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-13 20:40:34,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 1 [2021-07-13 20:40:34,576 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:34,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:34,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:34,589 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-13 20:40:34,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 1 [2021-07-13 20:40:34,590 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:34,788 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 31 [2021-07-13 20:40:34,788 INFO L628 ElimStorePlain]: treesize reduction 193, result has 41.2 percent of original size [2021-07-13 20:40:34,791 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 20:40:34,791 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:953, output treesize:150 [2021-07-13 20:40:35,008 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:35,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907548200] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:35,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:35,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-07-13 20:40:35,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704778085] [2021-07-13 20:40:35,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:40:35,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:35,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:40:35,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:40:35,009 INFO L87 Difference]: Start difference. First operand 2041 states and 6951 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:36,313 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2021-07-13 20:40:36,439 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 51 [2021-07-13 20:40:36,849 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-07-13 20:40:37,148 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 69 [2021-07-13 20:40:37,516 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2021-07-13 20:40:37,696 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-07-13 20:40:38,003 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 70 [2021-07-13 20:40:38,180 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2021-07-13 20:40:38,393 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-07-13 20:40:38,524 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2021-07-13 20:40:38,778 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 35 [2021-07-13 20:40:38,940 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 39 [2021-07-13 20:40:39,126 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-07-13 20:40:39,414 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 39 [2021-07-13 20:40:39,607 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2021-07-13 20:40:39,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:39,790 INFO L93 Difference]: Finished difference Result 3293 states and 10339 transitions. [2021-07-13 20:40:39,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:40:39,791 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:40:39,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:39,796 INFO L225 Difference]: With dead ends: 3293 [2021-07-13 20:40:39,796 INFO L226 Difference]: Without dead ends: 3220 [2021-07-13 20:40:39,797 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 4663.0ms TimeCoverageRelationStatistics Valid=647, Invalid=2893, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:40:39,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3220 states. [2021-07-13 20:40:39,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3220 to 2049. [2021-07-13 20:40:39,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2049 states, 2048 states have (on average 3.4072265625) internal successors, (6978), 2048 states have internal predecessors, (6978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:39,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2049 states to 2049 states and 6978 transitions. [2021-07-13 20:40:39,831 INFO L78 Accepts]: Start accepts. Automaton has 2049 states and 6978 transitions. Word has length 26 [2021-07-13 20:40:39,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:39,831 INFO L482 AbstractCegarLoop]: Abstraction has 2049 states and 6978 transitions. [2021-07-13 20:40:39,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:39,831 INFO L276 IsEmpty]: Start isEmpty. Operand 2049 states and 6978 transitions. [2021-07-13 20:40:39,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:40:39,834 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:39,834 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:40:40,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3341 [2021-07-13 20:40:40,038 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:40,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:40,038 INFO L82 PathProgramCache]: Analyzing trace with hash -272116042, now seen corresponding path program 52 times [2021-07-13 20:40:40,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:40,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315930625] [2021-07-13 20:40:40,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:40,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:40,451 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:40,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:40,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315930625] [2021-07-13 20:40:40,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315930625] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:40,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175633631] [2021-07-13 20:40:40,451 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 [2021-07-13 20:40:40,476 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:40:40,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:40,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:40:40,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:40,896 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-07-13 20:40:40,994 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_460, v_prenex_455, v_prenex_457], 6=[A, v_prenex_450, v_prenex_453, v_prenex_444, v_prenex_446]} [2021-07-13 20:40:41,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:41,025 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:40:41,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-13 20:40:41,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:41,440 WARN L205 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 158 [2021-07-13 20:40:41,441 INFO L628 ElimStorePlain]: treesize reduction 283, result has 56.5 percent of original size [2021-07-13 20:40:41,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:41,470 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:40:41,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-07-13 20:40:41,472 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:41,624 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2021-07-13 20:40:41,624 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:41,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:41,646 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:41,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-13 20:40:41,649 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:41,926 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 149 [2021-07-13 20:40:41,927 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.4 percent of original size [2021-07-13 20:40:41,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:41,943 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:41,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 32 [2021-07-13 20:40:41,948 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:42,182 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 140 [2021-07-13 20:40:42,182 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.3 percent of original size [2021-07-13 20:40:42,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:42,202 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:40:42,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-13 20:40:42,203 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:42,327 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2021-07-13 20:40:42,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:42,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:42,344 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:42,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-13 20:40:42,349 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:42,466 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-07-13 20:40:42,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:42,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:42,488 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:40:42,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-13 20:40:42,492 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:42,605 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-07-13 20:40:42,605 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:42,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:42,624 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:40:42,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:40:42,626 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:42,735 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-07-13 20:40:42,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:42,754 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:40:42,754 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 24 variables, input treesize:658, output treesize:346 [2021-07-13 20:40:42,949 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-07-13 20:40:43,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:43,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175633631] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:43,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:43,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:40:43,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809736775] [2021-07-13 20:40:43,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:40:43,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:43,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:40:43,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:40:43,064 INFO L87 Difference]: Start difference. First operand 2049 states and 6978 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:44,256 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 85 [2021-07-13 20:40:44,770 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 67 [2021-07-13 20:40:44,985 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-07-13 20:40:45,368 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 84 [2021-07-13 20:40:45,666 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 32 [2021-07-13 20:40:45,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:45,731 INFO L93 Difference]: Finished difference Result 2966 states and 9810 transitions. [2021-07-13 20:40:45,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:40:45,731 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:40:45,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:45,737 INFO L225 Difference]: With dead ends: 2966 [2021-07-13 20:40:45,737 INFO L226 Difference]: Without dead ends: 2951 [2021-07-13 20:40:45,737 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 3074.8ms TimeCoverageRelationStatistics Valid=291, Invalid=1041, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:40:45,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2951 states. [2021-07-13 20:40:45,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2951 to 2061. [2021-07-13 20:40:45,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2061 states, 2060 states have (on average 3.404368932038835) internal successors, (7013), 2060 states have internal predecessors, (7013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:45,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2061 states to 2061 states and 7013 transitions. [2021-07-13 20:40:45,773 INFO L78 Accepts]: Start accepts. Automaton has 2061 states and 7013 transitions. Word has length 26 [2021-07-13 20:40:45,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:45,773 INFO L482 AbstractCegarLoop]: Abstraction has 2061 states and 7013 transitions. [2021-07-13 20:40:45,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:45,773 INFO L276 IsEmpty]: Start isEmpty. Operand 2061 states and 7013 transitions. [2021-07-13 20:40:45,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:40:45,776 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:45,776 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:40:45,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3477,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:40:45,989 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:45,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:45,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1962058946, now seen corresponding path program 53 times [2021-07-13 20:40:45,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:45,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310558325] [2021-07-13 20:40:45,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:45,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:46,348 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:46,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:46,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310558325] [2021-07-13 20:40:46,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310558325] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:46,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669297282] [2021-07-13 20:40:46,349 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 [2021-07-13 20:40:46,376 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:40:46,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:46,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:40:46,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:46,932 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2021-07-13 20:40:47,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:47,057 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:47,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:40:47,061 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:47,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:47,071 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:40:47,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:40:47,073 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:47,206 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-07-13 20:40:47,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:47,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:47,220 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:47,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:40:47,221 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:47,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:47,232 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:47,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:40:47,234 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:47,360 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-07-13 20:40:47,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:47,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:47,374 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:47,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-13 20:40:47,376 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:47,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:47,386 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:40:47,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:40:47,388 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:47,502 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-07-13 20:40:47,502 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:47,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:47,514 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:40:47,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-13 20:40:47,516 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:47,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:47,525 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:47,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:40:47,529 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:47,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:47,635 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:40:47,635 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:341, output treesize:174 [2021-07-13 20:40:47,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:47,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669297282] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:47,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:47,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 20:40:47,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631654379] [2021-07-13 20:40:47,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:40:47,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:47,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:40:47,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:40:47,830 INFO L87 Difference]: Start difference. First operand 2061 states and 7013 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:48,412 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2021-07-13 20:40:48,636 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-07-13 20:40:49,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:49,194 INFO L93 Difference]: Finished difference Result 2612 states and 8738 transitions. [2021-07-13 20:40:49,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:40:49,195 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:40:49,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:49,199 INFO L225 Difference]: With dead ends: 2612 [2021-07-13 20:40:49,199 INFO L226 Difference]: Without dead ends: 2587 [2021-07-13 20:40:49,200 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1797.0ms TimeCoverageRelationStatistics Valid=145, Invalid=611, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:40:49,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2587 states. [2021-07-13 20:40:49,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2587 to 2061. [2021-07-13 20:40:49,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2061 states, 2060 states have (on average 3.404368932038835) internal successors, (7013), 2060 states have internal predecessors, (7013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:49,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2061 states to 2061 states and 7013 transitions. [2021-07-13 20:40:49,228 INFO L78 Accepts]: Start accepts. Automaton has 2061 states and 7013 transitions. Word has length 26 [2021-07-13 20:40:49,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:49,228 INFO L482 AbstractCegarLoop]: Abstraction has 2061 states and 7013 transitions. [2021-07-13 20:40:49,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:49,228 INFO L276 IsEmpty]: Start isEmpty. Operand 2061 states and 7013 transitions. [2021-07-13 20:40:49,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:40:49,231 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:49,231 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:40:49,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3519 [2021-07-13 20:40:49,445 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:49,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:49,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1086187700, now seen corresponding path program 54 times [2021-07-13 20:40:49,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:49,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868296438] [2021-07-13 20:40:49,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:49,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:49,901 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:49,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:49,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868296438] [2021-07-13 20:40:49,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868296438] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:49,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462890618] [2021-07-13 20:40:49,901 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 [2021-07-13 20:40:49,927 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:40:49,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:49,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:40:49,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:50,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:50,160 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:40:50,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:40:50,161 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:50,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:50,168 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:40:50,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:40:50,169 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:50,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:50,180 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:40:50,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:40:50,181 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:50,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:50,189 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:40:50,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:40:50,189 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:50,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:50,200 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:40:50,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:40:50,202 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:50,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:50,212 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:50,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:40:50,214 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:50,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:50,222 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:40:50,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:40:50,223 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:50,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:50,234 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:50,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-13 20:40:50,235 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:50,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:50,246 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:50,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:40:50,249 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:50,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:50,258 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:40:50,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-07-13 20:40:50,259 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:50,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:50,268 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:40:50,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-07-13 20:40:50,268 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:50,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:50,280 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:50,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:40:50,283 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:50,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:50,294 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:40:50,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-13 20:40:50,296 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:50,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:50,307 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:50,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:40:50,311 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:50,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:50,320 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:40:50,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:40:50,321 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:50,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:50,327 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:40:50,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:40:50,327 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:50,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:50,408 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:40:50,409 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-07-13 20:40:50,598 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:50,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462890618] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:50,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:50,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-13 20:40:50,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668294334] [2021-07-13 20:40:50,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:40:50,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:50,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:40:50,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:40:50,599 INFO L87 Difference]: Start difference. First operand 2061 states and 7013 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:51,005 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-07-13 20:40:52,071 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2021-07-13 20:40:52,347 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 52 [2021-07-13 20:40:52,525 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2021-07-13 20:40:52,798 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-07-13 20:40:53,144 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2021-07-13 20:40:53,465 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 45 [2021-07-13 20:40:53,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:53,528 INFO L93 Difference]: Finished difference Result 2664 states and 8880 transitions. [2021-07-13 20:40:53,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:40:53,528 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:40:53,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:53,533 INFO L225 Difference]: With dead ends: 2664 [2021-07-13 20:40:53,533 INFO L226 Difference]: Without dead ends: 2649 [2021-07-13 20:40:53,533 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 3027.7ms TimeCoverageRelationStatistics Valid=276, Invalid=1446, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:40:53,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2649 states. [2021-07-13 20:40:53,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2649 to 2049. [2021-07-13 20:40:53,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2049 states, 2048 states have (on average 3.4072265625) internal successors, (6978), 2048 states have internal predecessors, (6978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:53,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2049 states to 2049 states and 6978 transitions. [2021-07-13 20:40:53,562 INFO L78 Accepts]: Start accepts. Automaton has 2049 states and 6978 transitions. Word has length 26 [2021-07-13 20:40:53,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:53,563 INFO L482 AbstractCegarLoop]: Abstraction has 2049 states and 6978 transitions. [2021-07-13 20:40:53,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:53,563 INFO L276 IsEmpty]: Start isEmpty. Operand 2049 states and 6978 transitions. [2021-07-13 20:40:53,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:40:53,565 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:53,566 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:40:53,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3553,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:40:53,782 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:53,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:53,782 INFO L82 PathProgramCache]: Analyzing trace with hash 935709652, now seen corresponding path program 61 times [2021-07-13 20:40:53,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:53,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337518473] [2021-07-13 20:40:53,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:53,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:54,153 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:54,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:54,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337518473] [2021-07-13 20:40:54,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337518473] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:54,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491243606] [2021-07-13 20:40:54,154 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 [2021-07-13 20:40:54,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:54,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:40:54,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:54,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:54,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:54,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:54,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:54,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:54,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:40:54,651 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:54,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:54,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:54,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:54,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:54,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:54,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:40:54,658 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:54,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:54,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:54,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:54,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:54,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:54,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-07-13 20:40:54,666 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:54,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:54,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:54,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:54,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:54,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:54,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:40:54,674 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:54,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:54,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:54,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:54,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:54,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:54,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-13 20:40:54,681 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:54,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:54,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:54,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:54,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:54,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:54,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:40:54,689 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:54,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:54,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:54,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:54,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:54,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:54,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-07-13 20:40:54,697 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:54,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:54,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:54,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:54,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:54,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:54,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-13 20:40:54,704 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:54,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:54,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:54,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:54,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:54,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:54,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-13 20:40:54,712 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:54,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:54,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:54,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:54,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:54,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:54,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-07-13 20:40:54,719 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:54,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:54,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:54,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:54,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:54,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:54,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-13 20:40:54,726 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:54,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:54,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:54,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:54,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:54,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:54,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-13 20:40:54,733 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:54,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:54,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:54,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:54,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:54,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:54,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-13 20:40:54,740 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:54,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:54,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:54,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:54,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:54,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:54,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-13 20:40:54,747 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:54,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:54,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:54,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:54,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-07-13 20:40:54,751 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:54,774 INFO L628 ElimStorePlain]: treesize reduction 16, result has 62.8 percent of original size [2021-07-13 20:40:54,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:40:54,775 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-07-13 20:40:54,792 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:54,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491243606] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:54,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:54,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-07-13 20:40:54,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276900999] [2021-07-13 20:40:54,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:40:54,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:54,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:40:54,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:40:54,793 INFO L87 Difference]: Start difference. First operand 2049 states and 6978 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:57,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:57,226 INFO L93 Difference]: Finished difference Result 2625 states and 8625 transitions. [2021-07-13 20:40:57,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:40:57,227 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:40:57,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:57,231 INFO L225 Difference]: With dead ends: 2625 [2021-07-13 20:40:57,231 INFO L226 Difference]: Without dead ends: 2603 [2021-07-13 20:40:57,232 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 838 ImplicationChecksByTransitivity, 2461.9ms TimeCoverageRelationStatistics Valid=525, Invalid=2127, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 20:40:57,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2603 states. [2021-07-13 20:40:57,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2603 to 2047. [2021-07-13 20:40:57,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2047 states, 2046 states have (on average 3.40811339198436) internal successors, (6973), 2046 states have internal predecessors, (6973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:57,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2047 states to 2047 states and 6973 transitions. [2021-07-13 20:40:57,260 INFO L78 Accepts]: Start accepts. Automaton has 2047 states and 6973 transitions. Word has length 26 [2021-07-13 20:40:57,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:57,260 INFO L482 AbstractCegarLoop]: Abstraction has 2047 states and 6973 transitions. [2021-07-13 20:40:57,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:57,260 INFO L276 IsEmpty]: Start isEmpty. Operand 2047 states and 6973 transitions. [2021-07-13 20:40:57,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:40:57,263 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:57,263 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:40:57,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3570 [2021-07-13 20:40:57,479 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:57,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:57,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1861203518, now seen corresponding path program 62 times [2021-07-13 20:40:57,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:57,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473121471] [2021-07-13 20:40:57,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:57,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:57,776 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:57,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:57,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473121471] [2021-07-13 20:40:57,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473121471] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:57,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428485984] [2021-07-13 20:40:57,777 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 [2021-07-13 20:40:57,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:40:57,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:57,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:40:57,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:58,119 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-07-13 20:40:58,168 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_470], 6=[v_prenex_472, v_prenex_474]} [2021-07-13 20:40:58,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:58,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:58,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:58,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-13 20:40:58,175 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:58,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:58,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:58,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 7 [2021-07-13 20:40:58,182 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:58,295 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2021-07-13 20:40:58,295 INFO L628 ElimStorePlain]: treesize reduction 162, result has 46.2 percent of original size [2021-07-13 20:40:58,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:58,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:58,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:58,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:40:58,301 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:58,338 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:58,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:58,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:58,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:58,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-13 20:40:58,344 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:58,379 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:58,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:58,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:58,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:58,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:58,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-13 20:40:58,385 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:58,415 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:58,418 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:40:58,418 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:365, output treesize:33 [2021-07-13 20:40:58,467 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:58,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428485984] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:58,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:58,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-13 20:40:58,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690129373] [2021-07-13 20:40:58,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:40:58,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:58,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:40:58,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:40:58,468 INFO L87 Difference]: Start difference. First operand 2047 states and 6973 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:59,969 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-07-13 20:41:00,238 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-07-13 20:41:00,384 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2021-07-13 20:41:00,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:00,517 INFO L93 Difference]: Finished difference Result 2959 states and 9765 transitions. [2021-07-13 20:41:00,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:41:00,518 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:41:00,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:00,523 INFO L225 Difference]: With dead ends: 2959 [2021-07-13 20:41:00,523 INFO L226 Difference]: Without dead ends: 2919 [2021-07-13 20:41:00,524 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 2037.8ms TimeCoverageRelationStatistics Valid=405, Invalid=1317, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:41:00,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2919 states. [2021-07-13 20:41:00,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2919 to 2063. [2021-07-13 20:41:00,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2063 states, 2062 states have (on average 3.41270611057226) internal successors, (7037), 2062 states have internal predecessors, (7037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:00,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2063 states to 2063 states and 7037 transitions. [2021-07-13 20:41:00,555 INFO L78 Accepts]: Start accepts. Automaton has 2063 states and 7037 transitions. Word has length 26 [2021-07-13 20:41:00,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:00,556 INFO L482 AbstractCegarLoop]: Abstraction has 2063 states and 7037 transitions. [2021-07-13 20:41:00,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:00,556 INFO L276 IsEmpty]: Start isEmpty. Operand 2063 states and 7037 transitions. [2021-07-13 20:41:00,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:41:00,558 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:00,558 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:00,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3660 [2021-07-13 20:41:00,774 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:00,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:00,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1211067586, now seen corresponding path program 63 times [2021-07-13 20:41:00,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:00,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075777088] [2021-07-13 20:41:00,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:00,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:01,066 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:01,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:01,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075777088] [2021-07-13 20:41:01,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075777088] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:01,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085777515] [2021-07-13 20:41:01,067 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 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 [2021-07-13 20:41:01,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:41:01,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:01,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:41:01,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:01,495 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-07-13 20:41:01,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:01,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:01,677 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:01,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 51 [2021-07-13 20:41:01,684 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:01,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:01,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:01,739 INFO L354 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2021-07-13 20:41:01,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 39 [2021-07-13 20:41:01,744 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:02,960 WARN L205 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 198 DAG size of output: 183 [2021-07-13 20:41:02,961 INFO L628 ElimStorePlain]: treesize reduction 42, result has 95.5 percent of original size [2021-07-13 20:41:02,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:02,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:03,024 INFO L354 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2021-07-13 20:41:03,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 43 [2021-07-13 20:41:03,027 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:03,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:03,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:03,084 INFO L354 Elim1Store]: treesize reduction 4, result has 87.9 percent of original size [2021-07-13 20:41:03,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 47 [2021-07-13 20:41:03,090 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:04,289 WARN L205 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 188 DAG size of output: 183 [2021-07-13 20:41:04,290 INFO L628 ElimStorePlain]: treesize reduction 24, result has 97.4 percent of original size [2021-07-13 20:41:04,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:04,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:04,337 INFO L354 Elim1Store]: treesize reduction 16, result has 51.5 percent of original size [2021-07-13 20:41:04,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 32 [2021-07-13 20:41:04,341 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:04,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:04,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:04,383 INFO L354 Elim1Store]: treesize reduction 16, result has 51.5 percent of original size [2021-07-13 20:41:04,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 32 [2021-07-13 20:41:04,387 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:05,493 WARN L205 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 173 DAG size of output: 172 [2021-07-13 20:41:05,494 INFO L628 ElimStorePlain]: treesize reduction 44, result has 94.9 percent of original size [2021-07-13 20:41:05,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:05,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:05,540 INFO L354 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2021-07-13 20:41:05,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 28 [2021-07-13 20:41:05,542 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:05,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:05,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:05,582 INFO L354 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2021-07-13 20:41:05,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 31 [2021-07-13 20:41:05,584 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:06,089 WARN L205 SmtUtils]: Spent 504.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2021-07-13 20:41:06,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:06,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:06,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:06,140 INFO L354 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2021-07-13 20:41:06,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 39 [2021-07-13 20:41:06,145 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:06,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:06,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:06,187 INFO L354 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2021-07-13 20:41:06,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 36 [2021-07-13 20:41:06,193 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:07,130 WARN L205 SmtUtils]: Spent 936.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 152 [2021-07-13 20:41:07,131 INFO L628 ElimStorePlain]: treesize reduction 18, result has 97.7 percent of original size [2021-07-13 20:41:07,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:07,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:07,186 INFO L354 Elim1Store]: treesize reduction 4, result has 87.9 percent of original size [2021-07-13 20:41:07,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 44 [2021-07-13 20:41:07,194 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:07,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:07,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:07,228 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:07,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 21 treesize of output 45 [2021-07-13 20:41:07,238 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:07,696 WARN L205 SmtUtils]: Spent 457.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2021-07-13 20:41:07,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:07,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:07,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:07,739 INFO L354 Elim1Store]: treesize reduction 16, result has 51.5 percent of original size [2021-07-13 20:41:07,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 35 [2021-07-13 20:41:07,742 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:07,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:07,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:07,775 INFO L354 Elim1Store]: treesize reduction 16, result has 51.5 percent of original size [2021-07-13 20:41:07,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 35 [2021-07-13 20:41:07,777 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:08,537 WARN L205 SmtUtils]: Spent 759.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 135 [2021-07-13 20:41:08,538 INFO L628 ElimStorePlain]: treesize reduction 11, result has 98.4 percent of original size [2021-07-13 20:41:08,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:08,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:08,586 INFO L354 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2021-07-13 20:41:08,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 31 treesize of output 43 [2021-07-13 20:41:08,590 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:08,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:08,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:08,630 INFO L354 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2021-07-13 20:41:08,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 36 [2021-07-13 20:41:08,634 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:09,033 WARN L205 SmtUtils]: Spent 398.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-07-13 20:41:09,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:09,076 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 15 xjuncts. [2021-07-13 20:41:09,077 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 24 variables, input treesize:945, output treesize:1467 [2021-07-13 20:41:09,570 WARN L205 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 49 [2021-07-13 20:41:09,684 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:09,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085777515] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:09,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:09,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 20:41:09,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306471271] [2021-07-13 20:41:09,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:41:09,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:09,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:41:09,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:41:09,685 INFO L87 Difference]: Start difference. First operand 2063 states and 7037 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:10,307 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 31 [2021-07-13 20:41:10,534 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 37 [2021-07-13 20:41:10,957 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 39 [2021-07-13 20:41:11,467 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2021-07-13 20:41:11,637 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 34 [2021-07-13 20:41:11,960 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 45 [2021-07-13 20:41:12,425 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-07-13 20:41:12,658 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2021-07-13 20:41:12,854 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 30 [2021-07-13 20:41:12,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:12,929 INFO L93 Difference]: Finished difference Result 2842 states and 9205 transitions. [2021-07-13 20:41:12,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 20:41:12,930 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:41:12,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:12,935 INFO L225 Difference]: With dead ends: 2842 [2021-07-13 20:41:12,935 INFO L226 Difference]: Without dead ends: 2798 [2021-07-13 20:41:12,936 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 3931.5ms TimeCoverageRelationStatistics Valid=456, Invalid=1524, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:41:12,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2798 states. [2021-07-13 20:41:12,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2798 to 2136. [2021-07-13 20:41:12,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2136 states, 2135 states have (on average 3.406088992974239) internal successors, (7272), 2135 states have internal predecessors, (7272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:12,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2136 states to 2136 states and 7272 transitions. [2021-07-13 20:41:12,969 INFO L78 Accepts]: Start accepts. Automaton has 2136 states and 7272 transitions. Word has length 26 [2021-07-13 20:41:12,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:12,970 INFO L482 AbstractCegarLoop]: Abstraction has 2136 states and 7272 transitions. [2021-07-13 20:41:12,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:12,970 INFO L276 IsEmpty]: Start isEmpty. Operand 2136 states and 7272 transitions. [2021-07-13 20:41:12,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:41:12,973 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:12,973 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:13,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3674,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:13,188 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:13,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:13,188 INFO L82 PathProgramCache]: Analyzing trace with hash -550813574, now seen corresponding path program 55 times [2021-07-13 20:41:13,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:13,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815248726] [2021-07-13 20:41:13,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:13,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:13,551 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:13,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:13,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815248726] [2021-07-13 20:41:13,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815248726] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:13,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982774856] [2021-07-13 20:41:13,552 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 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 [2021-07-13 20:41:13,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:13,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:41:13,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:14,031 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-07-13 20:41:14,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:14,144 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:41:14,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 16 [2021-07-13 20:41:14,146 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:14,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:14,169 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:14,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-07-13 20:41:14,175 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:14,516 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 147 [2021-07-13 20:41:14,516 INFO L628 ElimStorePlain]: treesize reduction 194, result has 64.3 percent of original size [2021-07-13 20:41:14,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:14,544 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:41:14,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-07-13 20:41:14,546 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:14,687 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2021-07-13 20:41:14,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:14,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:14,712 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:41:14,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-13 20:41:14,714 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:14,851 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2021-07-13 20:41:14,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:14,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:14,877 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:41:14,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-13 20:41:14,879 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:15,010 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2021-07-13 20:41:15,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:15,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:15,034 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:41:15,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-13 20:41:15,037 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:15,165 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2021-07-13 20:41:15,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:15,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:15,189 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:41:15,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:41:15,191 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:15,351 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-07-13 20:41:15,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:15,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:15,369 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:15,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-07-13 20:41:15,375 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:15,597 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 120 [2021-07-13 20:41:15,597 INFO L628 ElimStorePlain]: treesize reduction 12, result has 95.8 percent of original size [2021-07-13 20:41:15,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:15,613 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:15,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-13 20:41:15,616 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:15,831 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 114 [2021-07-13 20:41:15,832 INFO L628 ElimStorePlain]: treesize reduction 8, result has 97.0 percent of original size [2021-07-13 20:41:15,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:41:15,847 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 24 variables, input treesize:583, output treesize:253 [2021-07-13 20:41:16,022 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-07-13 20:41:16,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:16,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982774856] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:16,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:16,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:41:16,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038780104] [2021-07-13 20:41:16,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:41:16,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:16,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:41:16,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:41:16,119 INFO L87 Difference]: Start difference. First operand 2136 states and 7272 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:17,278 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 70 [2021-07-13 20:41:17,511 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-07-13 20:41:17,720 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-07-13 20:41:18,121 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 92 [2021-07-13 20:41:18,466 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2021-07-13 20:41:18,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:18,523 INFO L93 Difference]: Finished difference Result 3051 states and 10102 transitions. [2021-07-13 20:41:18,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:41:18,523 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:41:18,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:18,529 INFO L225 Difference]: With dead ends: 3051 [2021-07-13 20:41:18,529 INFO L226 Difference]: Without dead ends: 3036 [2021-07-13 20:41:18,529 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 2870.0ms TimeCoverageRelationStatistics Valid=244, Invalid=878, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:41:18,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3036 states. [2021-07-13 20:41:18,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3036 to 2138. [2021-07-13 20:41:18,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2138 states, 2137 states have (on average 3.402433317735143) internal successors, (7271), 2137 states have internal predecessors, (7271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:18,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2138 states to 2138 states and 7271 transitions. [2021-07-13 20:41:18,565 INFO L78 Accepts]: Start accepts. Automaton has 2138 states and 7271 transitions. Word has length 26 [2021-07-13 20:41:18,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:18,565 INFO L482 AbstractCegarLoop]: Abstraction has 2138 states and 7271 transitions. [2021-07-13 20:41:18,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:18,565 INFO L276 IsEmpty]: Start isEmpty. Operand 2138 states and 7271 transitions. [2021-07-13 20:41:18,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:41:18,568 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:18,568 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:18,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3759 [2021-07-13 20:41:18,784 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:18,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:18,784 INFO L82 PathProgramCache]: Analyzing trace with hash 2054210818, now seen corresponding path program 56 times [2021-07-13 20:41:18,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:18,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631074613] [2021-07-13 20:41:18,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:18,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:19,213 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:19,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:19,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631074613] [2021-07-13 20:41:19,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631074613] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:19,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218954748] [2021-07-13 20:41:19,213 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 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 [2021-07-13 20:41:19,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:41:19,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:19,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:41:19,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:19,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:19,466 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:41:19,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:41:19,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:19,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:19,476 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:41:19,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:41:19,477 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:19,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:19,488 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:41:19,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:41:19,490 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:19,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:19,499 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:41:19,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:41:19,500 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:19,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:19,512 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:41:19,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:41:19,514 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:19,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:19,525 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:19,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:41:19,527 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:19,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:19,536 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:41:19,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:41:19,537 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:19,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:19,548 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:19,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-13 20:41:19,549 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:19,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:19,560 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:19,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:41:19,563 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:19,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:19,572 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:41:19,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-07-13 20:41:19,573 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:19,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:19,582 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:41:19,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-07-13 20:41:19,583 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:19,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:19,594 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:19,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:41:19,597 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:19,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:19,608 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:41:19,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-13 20:41:19,610 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:19,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:19,620 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:19,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:41:19,624 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:19,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:19,632 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:41:19,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:41:19,633 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:19,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:19,638 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:41:19,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:41:19,639 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:19,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:19,722 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:41:19,722 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-07-13 20:41:19,934 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:19,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218954748] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:19,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:19,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-13 20:41:19,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382800268] [2021-07-13 20:41:19,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:41:19,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:19,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:41:19,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:41:19,935 INFO L87 Difference]: Start difference. First operand 2138 states and 7271 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:20,238 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 38 [2021-07-13 20:41:21,071 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-07-13 20:41:21,255 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-07-13 20:41:21,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:21,350 INFO L93 Difference]: Finished difference Result 2900 states and 9631 transitions. [2021-07-13 20:41:21,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:41:21,350 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:41:21,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:21,355 INFO L225 Difference]: With dead ends: 2900 [2021-07-13 20:41:21,355 INFO L226 Difference]: Without dead ends: 2875 [2021-07-13 20:41:21,356 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1716.1ms TimeCoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:41:21,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2875 states. [2021-07-13 20:41:21,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2875 to 2131. [2021-07-13 20:41:21,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2131 states, 2130 states have (on average 3.3995305164319247) internal successors, (7241), 2130 states have internal predecessors, (7241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:21,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2131 states to 2131 states and 7241 transitions. [2021-07-13 20:41:21,387 INFO L78 Accepts]: Start accepts. Automaton has 2131 states and 7241 transitions. Word has length 26 [2021-07-13 20:41:21,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:21,387 INFO L482 AbstractCegarLoop]: Abstraction has 2131 states and 7241 transitions. [2021-07-13 20:41:21,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:21,387 INFO L276 IsEmpty]: Start isEmpty. Operand 2131 states and 7241 transitions. [2021-07-13 20:41:21,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:41:21,390 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:21,390 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:21,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3800,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:21,605 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:21,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:21,605 INFO L82 PathProgramCache]: Analyzing trace with hash 807490168, now seen corresponding path program 57 times [2021-07-13 20:41:21,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:21,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766862405] [2021-07-13 20:41:21,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:21,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:21,975 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:21,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:21,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766862405] [2021-07-13 20:41:21,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766862405] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:21,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982322899] [2021-07-13 20:41:21,975 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 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 [2021-07-13 20:41:22,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:41:22,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:22,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:41:22,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:22,506 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-07-13 20:41:22,842 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 68 [2021-07-13 20:41:22,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:22,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:22,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:22,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:41:22,994 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:22,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:22,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:23,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:41:23,001 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:23,177 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2021-07-13 20:41:23,178 INFO L628 ElimStorePlain]: treesize reduction 143, result has 51.5 percent of original size [2021-07-13 20:41:23,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:23,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 20:41:23,186 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:23,249 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:23,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:23,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:23,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:23,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:23,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:41:23,259 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:23,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:23,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:23,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:23,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:41:23,265 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:23,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:23,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:23,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:41:23,320 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:23,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:23,370 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:41:23,370 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 12 variables, input treesize:333, output treesize:51 [2021-07-13 20:41:23,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:23,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982322899] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:23,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:23,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:41:23,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225581926] [2021-07-13 20:41:23,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:41:23,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:23,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:41:23,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:41:23,424 INFO L87 Difference]: Start difference. First operand 2131 states and 7241 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:24,153 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2021-07-13 20:41:24,525 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-07-13 20:41:24,948 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 83 [2021-07-13 20:41:25,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:25,056 INFO L93 Difference]: Finished difference Result 2671 states and 8927 transitions. [2021-07-13 20:41:25,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:41:25,056 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:41:25,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:25,061 INFO L225 Difference]: With dead ends: 2671 [2021-07-13 20:41:25,062 INFO L226 Difference]: Without dead ends: 2656 [2021-07-13 20:41:25,062 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 2227.2ms TimeCoverageRelationStatistics Valid=174, Invalid=756, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:41:25,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2656 states. [2021-07-13 20:41:25,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2656 to 2119. [2021-07-13 20:41:25,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2119 states, 2118 states have (on average 3.4022662889518416) internal successors, (7206), 2118 states have internal predecessors, (7206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:25,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2119 states to 2119 states and 7206 transitions. [2021-07-13 20:41:25,111 INFO L78 Accepts]: Start accepts. Automaton has 2119 states and 7206 transitions. Word has length 26 [2021-07-13 20:41:25,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:25,111 INFO L482 AbstractCegarLoop]: Abstraction has 2119 states and 7206 transitions. [2021-07-13 20:41:25,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:25,111 INFO L276 IsEmpty]: Start isEmpty. Operand 2119 states and 7206 transitions. [2021-07-13 20:41:25,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:41:25,114 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:25,114 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:25,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3817,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:25,330 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:25,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:25,331 INFO L82 PathProgramCache]: Analyzing trace with hash 243784254, now seen corresponding path program 58 times [2021-07-13 20:41:25,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:25,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595235929] [2021-07-13 20:41:25,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:25,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:25,520 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 38 [2021-07-13 20:41:25,648 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 38 [2021-07-13 20:41:25,828 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-07-13 20:41:25,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:25,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:25,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595235929] [2021-07-13 20:41:25,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595235929] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:25,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350552195] [2021-07-13 20:41:25,936 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 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 [2021-07-13 20:41:25,960 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:41:25,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:25,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:41:25,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:26,280 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-07-13 20:41:26,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:26,385 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:41:26,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-13 20:41:26,387 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:26,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:26,398 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:26,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:41:26,403 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:26,536 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-07-13 20:41:26,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:26,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:26,550 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:41:26,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:41:26,552 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:26,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:26,562 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:26,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:41:26,565 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:26,719 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-07-13 20:41:26,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:26,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:26,733 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:41:26,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:41:26,735 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:26,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:26,744 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:26,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-13 20:41:26,746 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:26,857 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-07-13 20:41:26,857 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:26,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:26,870 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:26,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:41:26,871 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:26,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:26,881 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:26,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:41:26,884 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:26,983 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:26,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:41:26,990 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:333, output treesize:174 [2021-07-13 20:41:27,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:27,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350552195] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:27,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:27,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:41:27,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816032411] [2021-07-13 20:41:27,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:41:27,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:27,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:41:27,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:41:27,177 INFO L87 Difference]: Start difference. First operand 2119 states and 7206 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:28,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:28,226 INFO L93 Difference]: Finished difference Result 2740 states and 9175 transitions. [2021-07-13 20:41:28,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:41:28,227 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:41:28,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:28,232 INFO L225 Difference]: With dead ends: 2740 [2021-07-13 20:41:28,232 INFO L226 Difference]: Without dead ends: 2725 [2021-07-13 20:41:28,232 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1603.5ms TimeCoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:41:28,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2725 states. [2021-07-13 20:41:28,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2725 to 2113. [2021-07-13 20:41:28,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2113 states, 2112 states have (on average 3.403409090909091) internal successors, (7188), 2112 states have internal predecessors, (7188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:28,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2113 states to 2113 states and 7188 transitions. [2021-07-13 20:41:28,263 INFO L78 Accepts]: Start accepts. Automaton has 2113 states and 7188 transitions. Word has length 26 [2021-07-13 20:41:28,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:28,263 INFO L482 AbstractCegarLoop]: Abstraction has 2113 states and 7188 transitions. [2021-07-13 20:41:28,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:28,263 INFO L276 IsEmpty]: Start isEmpty. Operand 2113 states and 7188 transitions. [2021-07-13 20:41:28,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:41:28,266 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:28,266 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:28,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3836 [2021-07-13 20:41:28,468 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:28,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:28,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1128807410, now seen corresponding path program 64 times [2021-07-13 20:41:28,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:28,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346714913] [2021-07-13 20:41:28,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:28,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:28,771 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:28,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:28,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346714913] [2021-07-13 20:41:28,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346714913] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:28,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407332587] [2021-07-13 20:41:28,772 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 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 [2021-07-13 20:41:28,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:41:28,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:28,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:41:28,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:29,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:29,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:29,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:29,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:29,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:29,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:41:29,215 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:29,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:29,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:29,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:29,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:29,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:29,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-13 20:41:29,222 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:29,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:29,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:29,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:29,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:29,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:29,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-07-13 20:41:29,229 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:29,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:29,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:29,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:29,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:29,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:29,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-13 20:41:29,237 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:29,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:29,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:29,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:29,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:29,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:29,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-07-13 20:41:29,244 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:29,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:29,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:29,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:29,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:29,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:29,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-13 20:41:29,252 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:29,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:29,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:29,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:29,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:29,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:29,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-13 20:41:29,259 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:29,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:29,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:29,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:29,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:29,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:29,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-13 20:41:29,267 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:29,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:29,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:29,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:29,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:29,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:29,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-13 20:41:29,274 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:29,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:29,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:29,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:29,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:29,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:29,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:41:29,282 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:29,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:29,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:29,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:29,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:29,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:29,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-13 20:41:29,289 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:29,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:29,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:29,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:29,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:29,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:29,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-07-13 20:41:29,296 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:29,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:29,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:29,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:29,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:29,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:29,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:41:29,305 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:29,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:29,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:29,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:29,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:29,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:29,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:41:29,312 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:29,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:29,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:29,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:29,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-07-13 20:41:29,316 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:29,342 INFO L628 ElimStorePlain]: treesize reduction 32, result has 45.8 percent of original size [2021-07-13 20:41:29,343 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:41:29,343 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-07-13 20:41:29,379 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:29,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407332587] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:29,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:29,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-13 20:41:29,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943662866] [2021-07-13 20:41:29,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:41:29,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:29,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:41:29,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:41:29,380 INFO L87 Difference]: Start difference. First operand 2113 states and 7188 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:30,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:30,893 INFO L93 Difference]: Finished difference Result 2992 states and 9892 transitions. [2021-07-13 20:41:30,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:41:30,894 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:41:30,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:30,899 INFO L225 Difference]: With dead ends: 2992 [2021-07-13 20:41:30,900 INFO L226 Difference]: Without dead ends: 2955 [2021-07-13 20:41:30,900 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 1495.7ms TimeCoverageRelationStatistics Valid=344, Invalid=1296, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:41:30,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2955 states. [2021-07-13 20:41:30,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2955 to 2104. [2021-07-13 20:41:30,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2104 states, 2103 states have (on average 3.4013314312886354) internal successors, (7153), 2103 states have internal predecessors, (7153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:30,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2104 states to 2104 states and 7153 transitions. [2021-07-13 20:41:30,933 INFO L78 Accepts]: Start accepts. Automaton has 2104 states and 7153 transitions. Word has length 26 [2021-07-13 20:41:30,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:30,933 INFO L482 AbstractCegarLoop]: Abstraction has 2104 states and 7153 transitions. [2021-07-13 20:41:30,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:30,934 INFO L276 IsEmpty]: Start isEmpty. Operand 2104 states and 7153 transitions. [2021-07-13 20:41:30,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:30,936 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:30,936 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:31,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3869,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:31,152 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:31,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:31,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1868598568, now seen corresponding path program 59 times [2021-07-13 20:41:31,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:31,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669544874] [2021-07-13 20:41:31,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:31,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:31,190 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:31,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:31,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669544874] [2021-07-13 20:41:31,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669544874] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:31,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798230033] [2021-07-13 20:41:31,191 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 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 [2021-07-13 20:41:31,215 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:41:31,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:31,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:41:31,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:31,313 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:31,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798230033] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:31,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:31,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:41:31,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531907263] [2021-07-13 20:41:31,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:41:31,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:31,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:41:31,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:41:31,314 INFO L87 Difference]: Start difference. First operand 2104 states and 7153 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:32,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:32,333 INFO L93 Difference]: Finished difference Result 5069 states and 15729 transitions. [2021-07-13 20:41:32,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 20:41:32,334 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:41:32,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:32,343 INFO L225 Difference]: With dead ends: 5069 [2021-07-13 20:41:32,343 INFO L226 Difference]: Without dead ends: 5069 [2021-07-13 20:41:32,343 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 567.5ms TimeCoverageRelationStatistics Valid=802, Invalid=2858, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:41:32,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5069 states. [2021-07-13 20:41:32,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5069 to 2297. [2021-07-13 20:41:32,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2297 states, 2296 states have (on average 3.451219512195122) internal successors, (7924), 2296 states have internal predecessors, (7924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:32,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2297 states to 2297 states and 7924 transitions. [2021-07-13 20:41:32,394 INFO L78 Accepts]: Start accepts. Automaton has 2297 states and 7924 transitions. Word has length 28 [2021-07-13 20:41:32,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:32,394 INFO L482 AbstractCegarLoop]: Abstraction has 2297 states and 7924 transitions. [2021-07-13 20:41:32,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:32,394 INFO L276 IsEmpty]: Start isEmpty. Operand 2297 states and 7924 transitions. [2021-07-13 20:41:32,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:32,397 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:32,397 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:32,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3959 [2021-07-13 20:41:32,613 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:32,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:32,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1450049884, now seen corresponding path program 60 times [2021-07-13 20:41:32,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:32,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515175381] [2021-07-13 20:41:32,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:32,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:32,655 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:32,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:32,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515175381] [2021-07-13 20:41:32,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515175381] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:32,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717406341] [2021-07-13 20:41:32,655 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 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 [2021-07-13 20:41:32,681 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:41:32,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:32,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:41:32,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:32,795 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:32,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717406341] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:32,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:32,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 20:41:32,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356300091] [2021-07-13 20:41:32,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:41:32,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:32,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:41:32,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:41:32,796 INFO L87 Difference]: Start difference. First operand 2297 states and 7924 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:34,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:34,140 INFO L93 Difference]: Finished difference Result 6700 states and 20456 transitions. [2021-07-13 20:41:34,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-13 20:41:34,140 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:41:34,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:34,152 INFO L225 Difference]: With dead ends: 6700 [2021-07-13 20:41:34,152 INFO L226 Difference]: Without dead ends: 6700 [2021-07-13 20:41:34,152 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 800.3ms TimeCoverageRelationStatistics Valid=1110, Invalid=4590, Unknown=0, NotChecked=0, Total=5700 [2021-07-13 20:41:34,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6700 states. [2021-07-13 20:41:34,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6700 to 2308. [2021-07-13 20:41:34,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2308 states, 2307 states have (on average 3.4581707845687037) internal successors, (7978), 2307 states have internal predecessors, (7978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:34,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2308 states to 2308 states and 7978 transitions. [2021-07-13 20:41:34,211 INFO L78 Accepts]: Start accepts. Automaton has 2308 states and 7978 transitions. Word has length 28 [2021-07-13 20:41:34,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:34,211 INFO L482 AbstractCegarLoop]: Abstraction has 2308 states and 7978 transitions. [2021-07-13 20:41:34,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:34,212 INFO L276 IsEmpty]: Start isEmpty. Operand 2308 states and 7978 transitions. [2021-07-13 20:41:34,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:34,214 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:34,215 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:34,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3960,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:34,430 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:34,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:34,430 INFO L82 PathProgramCache]: Analyzing trace with hash 2017001964, now seen corresponding path program 61 times [2021-07-13 20:41:34,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:34,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449227185] [2021-07-13 20:41:34,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:34,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:34,469 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:34,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:34,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449227185] [2021-07-13 20:41:34,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449227185] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:34,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010101022] [2021-07-13 20:41:34,469 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 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 [2021-07-13 20:41:34,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:34,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:41:34,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:34,604 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:34,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010101022] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:34,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:34,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 20:41:34,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415710812] [2021-07-13 20:41:34,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:41:34,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:34,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:41:34,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:41:34,605 INFO L87 Difference]: Start difference. First operand 2308 states and 7978 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:35,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:35,900 INFO L93 Difference]: Finished difference Result 6089 states and 18976 transitions. [2021-07-13 20:41:35,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-13 20:41:35,901 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:41:35,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:35,913 INFO L225 Difference]: With dead ends: 6089 [2021-07-13 20:41:35,913 INFO L226 Difference]: Without dead ends: 6089 [2021-07-13 20:41:35,914 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 755.5ms TimeCoverageRelationStatistics Valid=1099, Invalid=4451, Unknown=0, NotChecked=0, Total=5550 [2021-07-13 20:41:35,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6089 states. [2021-07-13 20:41:35,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6089 to 2256. [2021-07-13 20:41:35,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2256 states, 2255 states have (on average 3.4350332594235033) internal successors, (7746), 2255 states have internal predecessors, (7746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:35,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2256 states to 2256 states and 7746 transitions. [2021-07-13 20:41:35,997 INFO L78 Accepts]: Start accepts. Automaton has 2256 states and 7746 transitions. Word has length 28 [2021-07-13 20:41:35,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:35,998 INFO L482 AbstractCegarLoop]: Abstraction has 2256 states and 7746 transitions. [2021-07-13 20:41:35,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:35,998 INFO L276 IsEmpty]: Start isEmpty. Operand 2256 states and 7746 transitions. [2021-07-13 20:41:36,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:36,001 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:36,001 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:36,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3961 [2021-07-13 20:41:36,217 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:36,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:36,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1095937010, now seen corresponding path program 62 times [2021-07-13 20:41:36,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:36,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610452793] [2021-07-13 20:41:36,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:36,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:36,257 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:36,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:36,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610452793] [2021-07-13 20:41:36,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610452793] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:36,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191356786] [2021-07-13 20:41:36,257 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 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 [2021-07-13 20:41:36,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:41:36,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:36,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:41:36,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:36,383 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:36,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191356786] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:36,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:36,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:41:36,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34429317] [2021-07-13 20:41:36,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:41:36,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:36,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:41:36,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:41:36,394 INFO L87 Difference]: Start difference. First operand 2256 states and 7746 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:37,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:37,532 INFO L93 Difference]: Finished difference Result 5162 states and 15913 transitions. [2021-07-13 20:41:37,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-13 20:41:37,532 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:41:37,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:37,541 INFO L225 Difference]: With dead ends: 5162 [2021-07-13 20:41:37,542 INFO L226 Difference]: Without dead ends: 5162 [2021-07-13 20:41:37,542 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 672.5ms TimeCoverageRelationStatistics Valid=904, Invalid=3652, Unknown=0, NotChecked=0, Total=4556 [2021-07-13 20:41:37,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5162 states. [2021-07-13 20:41:37,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5162 to 2269. [2021-07-13 20:41:37,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2269 states, 2268 states have (on average 3.432980599647266) internal successors, (7786), 2268 states have internal predecessors, (7786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:37,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2269 states to 2269 states and 7786 transitions. [2021-07-13 20:41:37,588 INFO L78 Accepts]: Start accepts. Automaton has 2269 states and 7786 transitions. Word has length 28 [2021-07-13 20:41:37,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:37,589 INFO L482 AbstractCegarLoop]: Abstraction has 2269 states and 7786 transitions. [2021-07-13 20:41:37,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:37,589 INFO L276 IsEmpty]: Start isEmpty. Operand 2269 states and 7786 transitions. [2021-07-13 20:41:37,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:37,591 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:37,592 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:37,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3962,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:37,792 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:37,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:37,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1989400020, now seen corresponding path program 65 times [2021-07-13 20:41:37,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:37,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061149452] [2021-07-13 20:41:37,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:37,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:37,837 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:37,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:37,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061149452] [2021-07-13 20:41:37,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061149452] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:37,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442725276] [2021-07-13 20:41:37,837 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 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 [2021-07-13 20:41:37,863 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:41:37,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:37,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:41:37,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:37,998 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:37,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442725276] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:37,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:37,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-13 20:41:37,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546576721] [2021-07-13 20:41:37,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:41:37,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:37,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:41:37,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:41:37,999 INFO L87 Difference]: Start difference. First operand 2269 states and 7786 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:38,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:38,627 INFO L93 Difference]: Finished difference Result 4589 states and 14330 transitions. [2021-07-13 20:41:38,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:41:38,628 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:41:38,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:38,636 INFO L225 Difference]: With dead ends: 4589 [2021-07-13 20:41:38,636 INFO L226 Difference]: Without dead ends: 4589 [2021-07-13 20:41:38,636 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 352.4ms TimeCoverageRelationStatistics Valid=383, Invalid=1339, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:41:38,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4589 states. [2021-07-13 20:41:38,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4589 to 2339. [2021-07-13 20:41:38,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2339 states, 2338 states have (on average 3.417023096663815) internal successors, (7989), 2338 states have internal predecessors, (7989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:38,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2339 states to 2339 states and 7989 transitions. [2021-07-13 20:41:38,685 INFO L78 Accepts]: Start accepts. Automaton has 2339 states and 7989 transitions. Word has length 28 [2021-07-13 20:41:38,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:38,685 INFO L482 AbstractCegarLoop]: Abstraction has 2339 states and 7989 transitions. [2021-07-13 20:41:38,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:38,685 INFO L276 IsEmpty]: Start isEmpty. Operand 2339 states and 7989 transitions. [2021-07-13 20:41:38,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:38,689 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:38,689 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:38,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3963 [2021-07-13 20:41:38,893 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:38,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:38,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1848031388, now seen corresponding path program 63 times [2021-07-13 20:41:38,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:38,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617491263] [2021-07-13 20:41:38,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:38,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:38,921 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:41:38,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:38,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617491263] [2021-07-13 20:41:38,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617491263] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:38,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434936140] [2021-07-13 20:41:38,922 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 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 [2021-07-13 20:41:38,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:41:38,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:38,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:41:38,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:39,013 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:41:39,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434936140] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:39,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:39,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:41:39,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290147106] [2021-07-13 20:41:39,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:41:39,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:39,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:41:39,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:41:39,014 INFO L87 Difference]: Start difference. First operand 2339 states and 7989 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:39,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:39,207 INFO L93 Difference]: Finished difference Result 3853 states and 12551 transitions. [2021-07-13 20:41:39,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:41:39,208 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:41:39,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:39,215 INFO L225 Difference]: With dead ends: 3853 [2021-07-13 20:41:39,215 INFO L226 Difference]: Without dead ends: 3829 [2021-07-13 20:41:39,215 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 117.2ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:41:39,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3829 states. [2021-07-13 20:41:39,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3829 to 2701. [2021-07-13 20:41:39,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2701 states, 2700 states have (on average 3.4851851851851854) internal successors, (9410), 2700 states have internal predecessors, (9410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:39,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2701 states to 2701 states and 9410 transitions. [2021-07-13 20:41:39,262 INFO L78 Accepts]: Start accepts. Automaton has 2701 states and 9410 transitions. Word has length 28 [2021-07-13 20:41:39,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:39,263 INFO L482 AbstractCegarLoop]: Abstraction has 2701 states and 9410 transitions. [2021-07-13 20:41:39,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:39,263 INFO L276 IsEmpty]: Start isEmpty. Operand 2701 states and 9410 transitions. [2021-07-13 20:41:39,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:39,266 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:39,266 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:39,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3964 [2021-07-13 20:41:39,467 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:39,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:39,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1411062680, now seen corresponding path program 64 times [2021-07-13 20:41:39,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:39,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547139545] [2021-07-13 20:41:39,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:39,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:39,502 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:39,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:39,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547139545] [2021-07-13 20:41:39,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547139545] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:39,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903426945] [2021-07-13 20:41:39,503 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 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 [2021-07-13 20:41:39,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:41:39,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:39,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:41:39,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:39,599 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:39,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903426945] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:39,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:39,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 20:41:39,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043686229] [2021-07-13 20:41:39,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:41:39,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:39,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:41:39,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:41:39,600 INFO L87 Difference]: Start difference. First operand 2701 states and 9410 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:40,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:40,267 INFO L93 Difference]: Finished difference Result 4524 states and 14456 transitions. [2021-07-13 20:41:40,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:41:40,267 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:41:40,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:40,275 INFO L225 Difference]: With dead ends: 4524 [2021-07-13 20:41:40,275 INFO L226 Difference]: Without dead ends: 4477 [2021-07-13 20:41:40,275 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 407.7ms TimeCoverageRelationStatistics Valid=515, Invalid=1465, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:41:40,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4477 states. [2021-07-13 20:41:40,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4477 to 2866. [2021-07-13 20:41:40,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2866 states, 2865 states have (on average 3.505759162303665) internal successors, (10044), 2865 states have internal predecessors, (10044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:40,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2866 states to 2866 states and 10044 transitions. [2021-07-13 20:41:40,330 INFO L78 Accepts]: Start accepts. Automaton has 2866 states and 10044 transitions. Word has length 28 [2021-07-13 20:41:40,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:40,330 INFO L482 AbstractCegarLoop]: Abstraction has 2866 states and 10044 transitions. [2021-07-13 20:41:40,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:40,330 INFO L276 IsEmpty]: Start isEmpty. Operand 2866 states and 10044 transitions. [2021-07-13 20:41:40,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:40,334 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:40,334 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:40,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3965,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:40,549 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:40,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:40,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1347815140, now seen corresponding path program 65 times [2021-07-13 20:41:40,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:40,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320609477] [2021-07-13 20:41:40,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:40,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:40,580 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:40,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:40,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320609477] [2021-07-13 20:41:40,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320609477] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:40,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657043774] [2021-07-13 20:41:40,581 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 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 [2021-07-13 20:41:40,605 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:41:40,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:40,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:41:40,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:40,692 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:40,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657043774] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:40,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:40,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 20:41:40,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777672916] [2021-07-13 20:41:40,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:41:40,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:40,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:41:40,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:41:40,693 INFO L87 Difference]: Start difference. First operand 2866 states and 10044 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:41,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:41,423 INFO L93 Difference]: Finished difference Result 4809 states and 15088 transitions. [2021-07-13 20:41:41,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:41:41,423 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:41:41,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:41,431 INFO L225 Difference]: With dead ends: 4809 [2021-07-13 20:41:41,432 INFO L226 Difference]: Without dead ends: 4783 [2021-07-13 20:41:41,432 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 460.2ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:41:41,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4783 states. [2021-07-13 20:41:41,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4783 to 2887. [2021-07-13 20:41:41,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2887 states, 2886 states have (on average 3.512127512127512) internal successors, (10136), 2886 states have internal predecessors, (10136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:41,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2887 states to 2887 states and 10136 transitions. [2021-07-13 20:41:41,488 INFO L78 Accepts]: Start accepts. Automaton has 2887 states and 10136 transitions. Word has length 28 [2021-07-13 20:41:41,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:41,489 INFO L482 AbstractCegarLoop]: Abstraction has 2887 states and 10136 transitions. [2021-07-13 20:41:41,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:41,489 INFO L276 IsEmpty]: Start isEmpty. Operand 2887 states and 10136 transitions. [2021-07-13 20:41:41,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:41,493 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:41,493 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:41,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3966,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:41,696 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:41,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:41,696 INFO L82 PathProgramCache]: Analyzing trace with hash -675402358, now seen corresponding path program 66 times [2021-07-13 20:41:41,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:41,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954554339] [2021-07-13 20:41:41,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:41,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:41,736 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:41,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:41,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954554339] [2021-07-13 20:41:41,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954554339] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:41,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328931816] [2021-07-13 20:41:41,736 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 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 [2021-07-13 20:41:41,760 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:41:41,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:41,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:41:41,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:41,847 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:41,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328931816] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:41,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:41,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 20:41:41,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081762827] [2021-07-13 20:41:41,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:41:41,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:41,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:41:41,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:41:41,848 INFO L87 Difference]: Start difference. First operand 2887 states and 10136 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:42,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:42,574 INFO L93 Difference]: Finished difference Result 4801 states and 15088 transitions. [2021-07-13 20:41:42,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:41:42,575 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:41:42,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:42,584 INFO L225 Difference]: With dead ends: 4801 [2021-07-13 20:41:42,584 INFO L226 Difference]: Without dead ends: 4786 [2021-07-13 20:41:42,585 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 467.8ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:41:42,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4786 states. [2021-07-13 20:41:42,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4786 to 2887. [2021-07-13 20:41:42,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2887 states, 2886 states have (on average 3.5076230076230077) internal successors, (10123), 2886 states have internal predecessors, (10123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:42,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2887 states to 2887 states and 10123 transitions. [2021-07-13 20:41:42,645 INFO L78 Accepts]: Start accepts. Automaton has 2887 states and 10123 transitions. Word has length 28 [2021-07-13 20:41:42,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:42,645 INFO L482 AbstractCegarLoop]: Abstraction has 2887 states and 10123 transitions. [2021-07-13 20:41:42,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:42,645 INFO L276 IsEmpty]: Start isEmpty. Operand 2887 states and 10123 transitions. [2021-07-13 20:41:42,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:42,650 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:42,650 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:42,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3967,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:42,866 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:42,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:42,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1724201280, now seen corresponding path program 67 times [2021-07-13 20:41:42,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:42,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817257097] [2021-07-13 20:41:42,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:42,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:42,892 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:42,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:42,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817257097] [2021-07-13 20:41:42,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817257097] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:42,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623165168] [2021-07-13 20:41:42,892 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 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 [2021-07-13 20:41:42,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:42,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:41:42,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:42,984 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:42,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623165168] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:42,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:42,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:41:42,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491190560] [2021-07-13 20:41:42,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:41:42,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:42,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:41:42,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:41:42,985 INFO L87 Difference]: Start difference. First operand 2887 states and 10123 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:43,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:43,618 INFO L93 Difference]: Finished difference Result 5555 states and 17807 transitions. [2021-07-13 20:41:43,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:41:43,619 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:41:43,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:43,629 INFO L225 Difference]: With dead ends: 5555 [2021-07-13 20:41:43,629 INFO L226 Difference]: Without dead ends: 5508 [2021-07-13 20:41:43,629 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 342.8ms TimeCoverageRelationStatistics Valid=455, Invalid=1267, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:41:43,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5508 states. [2021-07-13 20:41:43,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5508 to 3028. [2021-07-13 20:41:43,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3028 states, 3027 states have (on average 3.5500495540138752) internal successors, (10746), 3027 states have internal predecessors, (10746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:43,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3028 states to 3028 states and 10746 transitions. [2021-07-13 20:41:43,725 INFO L78 Accepts]: Start accepts. Automaton has 3028 states and 10746 transitions. Word has length 28 [2021-07-13 20:41:43,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:43,725 INFO L482 AbstractCegarLoop]: Abstraction has 3028 states and 10746 transitions. [2021-07-13 20:41:43,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:43,725 INFO L276 IsEmpty]: Start isEmpty. Operand 3028 states and 10746 transitions. [2021-07-13 20:41:43,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:43,729 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:43,729 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:43,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3968 [2021-07-13 20:41:43,945 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:43,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:43,945 INFO L82 PathProgramCache]: Analyzing trace with hash 359577472, now seen corresponding path program 68 times [2021-07-13 20:41:43,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:43,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010362475] [2021-07-13 20:41:43,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:43,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:43,967 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:41:43,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:43,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010362475] [2021-07-13 20:41:43,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010362475] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:43,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454199590] [2021-07-13 20:41:43,968 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 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 [2021-07-13 20:41:43,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:41:43,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:43,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:41:43,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:44,051 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:41:44,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454199590] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:44,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:44,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 20:41:44,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284760185] [2021-07-13 20:41:44,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:41:44,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:44,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:41:44,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:41:44,052 INFO L87 Difference]: Start difference. First operand 3028 states and 10746 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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) [2021-07-13 20:41:44,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:44,221 INFO L93 Difference]: Finished difference Result 4339 states and 14289 transitions. [2021-07-13 20:41:44,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:41:44,221 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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 28 [2021-07-13 20:41:44,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:44,228 INFO L225 Difference]: With dead ends: 4339 [2021-07-13 20:41:44,228 INFO L226 Difference]: Without dead ends: 4339 [2021-07-13 20:41:44,228 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 116.1ms TimeCoverageRelationStatistics Valid=132, Invalid=210, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:41:44,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4339 states. [2021-07-13 20:41:44,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4339 to 2863. [2021-07-13 20:41:44,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2863 states, 2862 states have (on average 3.5195667365478687) internal successors, (10073), 2862 states have internal predecessors, (10073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:44,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 10073 transitions. [2021-07-13 20:41:44,275 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 10073 transitions. Word has length 28 [2021-07-13 20:41:44,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:44,275 INFO L482 AbstractCegarLoop]: Abstraction has 2863 states and 10073 transitions. [2021-07-13 20:41:44,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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) [2021-07-13 20:41:44,275 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 10073 transitions. [2021-07-13 20:41:44,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:44,278 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:44,279 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:44,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3969 [2021-07-13 20:41:44,479 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:44,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:44,479 INFO L82 PathProgramCache]: Analyzing trace with hash -987104094, now seen corresponding path program 69 times [2021-07-13 20:41:44,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:44,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096072387] [2021-07-13 20:41:44,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:44,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:44,516 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:44,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:44,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096072387] [2021-07-13 20:41:44,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096072387] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:44,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321503911] [2021-07-13 20:41:44,517 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 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 [2021-07-13 20:41:44,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:41:44,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:44,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:41:44,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:44,620 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:44,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321503911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:44,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:44,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:41:44,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605149040] [2021-07-13 20:41:44,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:41:44,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:44,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:41:44,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:41:44,621 INFO L87 Difference]: Start difference. First operand 2863 states and 10073 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-07-13 20:41:45,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:45,359 INFO L93 Difference]: Finished difference Result 6209 states and 19661 transitions. [2021-07-13 20:41:45,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-13 20:41:45,360 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 28 [2021-07-13 20:41:45,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:45,373 INFO L225 Difference]: With dead ends: 6209 [2021-07-13 20:41:45,373 INFO L226 Difference]: Without dead ends: 6209 [2021-07-13 20:41:45,373 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 423.0ms TimeCoverageRelationStatistics Valid=552, Invalid=1800, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:41:45,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6209 states. [2021-07-13 20:41:45,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6209 to 2881. [2021-07-13 20:41:45,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2881 states, 2880 states have (on average 3.5194444444444444) internal successors, (10136), 2880 states have internal predecessors, (10136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:45,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2881 states to 2881 states and 10136 transitions. [2021-07-13 20:41:45,451 INFO L78 Accepts]: Start accepts. Automaton has 2881 states and 10136 transitions. Word has length 28 [2021-07-13 20:41:45,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:45,451 INFO L482 AbstractCegarLoop]: Abstraction has 2881 states and 10136 transitions. [2021-07-13 20:41:45,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-07-13 20:41:45,451 INFO L276 IsEmpty]: Start isEmpty. Operand 2881 states and 10136 transitions. [2021-07-13 20:41:45,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:45,455 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:45,456 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:45,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3970,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:45,656 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:45,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:45,656 INFO L82 PathProgramCache]: Analyzing trace with hash -202190000, now seen corresponding path program 70 times [2021-07-13 20:41:45,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:45,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34222366] [2021-07-13 20:41:45,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:45,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:45,711 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:45,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:45,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34222366] [2021-07-13 20:41:45,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34222366] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:45,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592831343] [2021-07-13 20:41:45,711 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 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 [2021-07-13 20:41:45,737 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:41:45,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:45,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:41:45,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:45,816 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:45,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592831343] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:45,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:45,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:41:45,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803330929] [2021-07-13 20:41:45,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:41:45,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:45,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:41:45,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:41:45,817 INFO L87 Difference]: Start difference. First operand 2881 states and 10136 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-07-13 20:41:46,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:46,691 INFO L93 Difference]: Finished difference Result 6471 states and 20458 transitions. [2021-07-13 20:41:46,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-13 20:41:46,692 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 28 [2021-07-13 20:41:46,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:46,706 INFO L225 Difference]: With dead ends: 6471 [2021-07-13 20:41:46,706 INFO L226 Difference]: Without dead ends: 6471 [2021-07-13 20:41:46,707 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 487.3ms TimeCoverageRelationStatistics Valid=634, Invalid=2336, Unknown=0, NotChecked=0, Total=2970 [2021-07-13 20:41:46,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6471 states. [2021-07-13 20:41:46,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6471 to 2975. [2021-07-13 20:41:46,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2975 states, 2974 states have (on average 3.511432414256893) internal successors, (10443), 2974 states have internal predecessors, (10443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:46,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2975 states to 2975 states and 10443 transitions. [2021-07-13 20:41:46,793 INFO L78 Accepts]: Start accepts. Automaton has 2975 states and 10443 transitions. Word has length 28 [2021-07-13 20:41:46,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:46,793 INFO L482 AbstractCegarLoop]: Abstraction has 2975 states and 10443 transitions. [2021-07-13 20:41:46,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-07-13 20:41:46,793 INFO L276 IsEmpty]: Start isEmpty. Operand 2975 states and 10443 transitions. [2021-07-13 20:41:46,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:46,798 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:46,798 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:47,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3971,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:47,011 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:47,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:47,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1285212656, now seen corresponding path program 71 times [2021-07-13 20:41:47,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:47,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224201996] [2021-07-13 20:41:47,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:47,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:47,044 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:47,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:47,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224201996] [2021-07-13 20:41:47,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224201996] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:47,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954073569] [2021-07-13 20:41:47,045 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 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 [2021-07-13 20:41:47,076 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:41:47,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:47,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:41:47,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:47,158 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:47,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954073569] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:47,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:47,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:41:47,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902385734] [2021-07-13 20:41:47,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:41:47,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:47,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:41:47,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:41:47,160 INFO L87 Difference]: Start difference. First operand 2975 states and 10443 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:47,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:47,812 INFO L93 Difference]: Finished difference Result 6662 states and 21078 transitions. [2021-07-13 20:41:47,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:41:47,813 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:41:47,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:47,826 INFO L225 Difference]: With dead ends: 6662 [2021-07-13 20:41:47,826 INFO L226 Difference]: Without dead ends: 6626 [2021-07-13 20:41:47,827 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 365.1ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:41:47,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6626 states. [2021-07-13 20:41:47,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6626 to 3377. [2021-07-13 20:41:47,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3377 states, 3376 states have (on average 3.5390995260663507) internal successors, (11948), 3376 states have internal predecessors, (11948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:47,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3377 states to 3377 states and 11948 transitions. [2021-07-13 20:41:47,919 INFO L78 Accepts]: Start accepts. Automaton has 3377 states and 11948 transitions. Word has length 28 [2021-07-13 20:41:47,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:47,919 INFO L482 AbstractCegarLoop]: Abstraction has 3377 states and 11948 transitions. [2021-07-13 20:41:47,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:47,919 INFO L276 IsEmpty]: Start isEmpty. Operand 3377 states and 11948 transitions. [2021-07-13 20:41:47,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:47,924 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:47,924 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:48,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3972,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:48,140 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:48,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:48,141 INFO L82 PathProgramCache]: Analyzing trace with hash 185865462, now seen corresponding path program 72 times [2021-07-13 20:41:48,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:48,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269110788] [2021-07-13 20:41:48,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:48,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:48,171 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:48,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:48,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269110788] [2021-07-13 20:41:48,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269110788] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:48,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552899138] [2021-07-13 20:41:48,171 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 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 [2021-07-13 20:41:48,196 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:41:48,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:48,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:41:48,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:48,270 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:48,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552899138] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:48,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:48,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:41:48,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423997251] [2021-07-13 20:41:48,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:41:48,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:48,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:41:48,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:41:48,271 INFO L87 Difference]: Start difference. First operand 3377 states and 11948 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:48,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:48,951 INFO L93 Difference]: Finished difference Result 6820 states and 21509 transitions. [2021-07-13 20:41:48,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:41:48,952 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:41:48,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:48,965 INFO L225 Difference]: With dead ends: 6820 [2021-07-13 20:41:48,965 INFO L226 Difference]: Without dead ends: 6820 [2021-07-13 20:41:48,966 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 398.8ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:41:48,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6820 states. [2021-07-13 20:41:49,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6820 to 3088. [2021-07-13 20:41:49,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3088 states, 3087 states have (on average 3.498542274052478) internal successors, (10800), 3087 states have internal predecessors, (10800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:49,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3088 states to 3088 states and 10800 transitions. [2021-07-13 20:41:49,048 INFO L78 Accepts]: Start accepts. Automaton has 3088 states and 10800 transitions. Word has length 28 [2021-07-13 20:41:49,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:49,049 INFO L482 AbstractCegarLoop]: Abstraction has 3088 states and 10800 transitions. [2021-07-13 20:41:49,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:49,049 INFO L276 IsEmpty]: Start isEmpty. Operand 3088 states and 10800 transitions. [2021-07-13 20:41:49,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:49,053 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:49,054 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:49,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3973 [2021-07-13 20:41:49,254 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:49,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:49,254 INFO L82 PathProgramCache]: Analyzing trace with hash -247011142, now seen corresponding path program 73 times [2021-07-13 20:41:49,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:49,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924185239] [2021-07-13 20:41:49,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:49,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:49,292 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:49,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:49,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924185239] [2021-07-13 20:41:49,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924185239] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:49,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487451363] [2021-07-13 20:41:49,292 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 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 [2021-07-13 20:41:49,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:49,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:41:49,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:49,388 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:49,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487451363] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:49,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:49,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:41:49,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260627962] [2021-07-13 20:41:49,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:41:49,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:49,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:41:49,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:41:49,389 INFO L87 Difference]: Start difference. First operand 3088 states and 10800 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-07-13 20:41:50,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:50,165 INFO L93 Difference]: Finished difference Result 5973 states and 19224 transitions. [2021-07-13 20:41:50,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-13 20:41:50,165 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 28 [2021-07-13 20:41:50,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:50,176 INFO L225 Difference]: With dead ends: 5973 [2021-07-13 20:41:50,177 INFO L226 Difference]: Without dead ends: 5969 [2021-07-13 20:41:50,177 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 442.0ms TimeCoverageRelationStatistics Valid=600, Invalid=2052, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 20:41:50,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5969 states. [2021-07-13 20:41:50,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5969 to 2848. [2021-07-13 20:41:50,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2848 states, 2847 states have (on average 3.523709167544784) internal successors, (10032), 2847 states have internal predecessors, (10032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:50,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2848 states to 2848 states and 10032 transitions. [2021-07-13 20:41:50,272 INFO L78 Accepts]: Start accepts. Automaton has 2848 states and 10032 transitions. Word has length 28 [2021-07-13 20:41:50,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:50,272 INFO L482 AbstractCegarLoop]: Abstraction has 2848 states and 10032 transitions. [2021-07-13 20:41:50,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-07-13 20:41:50,272 INFO L276 IsEmpty]: Start isEmpty. Operand 2848 states and 10032 transitions. [2021-07-13 20:41:50,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:50,277 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:50,277 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:50,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3974,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:50,493 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:50,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:50,493 INFO L82 PathProgramCache]: Analyzing trace with hash -519020332, now seen corresponding path program 74 times [2021-07-13 20:41:50,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:50,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188092573] [2021-07-13 20:41:50,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:50,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:50,546 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:50,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:50,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188092573] [2021-07-13 20:41:50,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188092573] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:50,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538519478] [2021-07-13 20:41:50,546 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 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 [2021-07-13 20:41:50,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:41:50,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:50,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:41:50,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:50,666 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:50,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538519478] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:50,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:50,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 20:41:50,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511911519] [2021-07-13 20:41:50,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:41:50,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:50,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:41:50,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:41:50,668 INFO L87 Difference]: Start difference. First operand 2848 states and 10032 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:51,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:51,757 INFO L93 Difference]: Finished difference Result 9218 states and 30019 transitions. [2021-07-13 20:41:51,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-13 20:41:51,758 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:41:51,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:51,779 INFO L225 Difference]: With dead ends: 9218 [2021-07-13 20:41:51,779 INFO L226 Difference]: Without dead ends: 9218 [2021-07-13 20:41:51,780 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 627.0ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-07-13 20:41:51,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9218 states. [2021-07-13 20:41:51,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9218 to 3024. [2021-07-13 20:41:51,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3024 states, 3023 states have (on average 3.595765795567317) internal successors, (10870), 3023 states have internal predecessors, (10870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:51,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3024 states to 3024 states and 10870 transitions. [2021-07-13 20:41:51,899 INFO L78 Accepts]: Start accepts. Automaton has 3024 states and 10870 transitions. Word has length 28 [2021-07-13 20:41:51,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:51,899 INFO L482 AbstractCegarLoop]: Abstraction has 3024 states and 10870 transitions. [2021-07-13 20:41:51,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:51,899 INFO L276 IsEmpty]: Start isEmpty. Operand 3024 states and 10870 transitions. [2021-07-13 20:41:51,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:51,904 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:51,904 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:52,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3975,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:52,117 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:52,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:52,117 INFO L82 PathProgramCache]: Analyzing trace with hash 47931748, now seen corresponding path program 75 times [2021-07-13 20:41:52,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:52,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569238305] [2021-07-13 20:41:52,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:52,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:52,150 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:52,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:52,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569238305] [2021-07-13 20:41:52,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569238305] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:52,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521910074] [2021-07-13 20:41:52,151 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 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 [2021-07-13 20:41:52,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:41:52,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:52,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:41:52,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:52,266 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:52,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521910074] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:52,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:52,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 20:41:52,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288575930] [2021-07-13 20:41:52,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:41:52,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:52,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:41:52,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:41:52,267 INFO L87 Difference]: Start difference. First operand 3024 states and 10870 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:53,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:53,328 INFO L93 Difference]: Finished difference Result 9047 states and 29554 transitions. [2021-07-13 20:41:53,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-13 20:41:53,328 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:41:53,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:53,349 INFO L225 Difference]: With dead ends: 9047 [2021-07-13 20:41:53,350 INFO L226 Difference]: Without dead ends: 9047 [2021-07-13 20:41:53,350 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1729 ImplicationChecksByTransitivity, 590.8ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-07-13 20:41:53,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9047 states. [2021-07-13 20:41:53,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9047 to 2996. [2021-07-13 20:41:53,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2996 states, 2995 states have (on average 3.579632721202003) internal successors, (10721), 2995 states have internal predecessors, (10721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:53,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2996 states to 2996 states and 10721 transitions. [2021-07-13 20:41:53,454 INFO L78 Accepts]: Start accepts. Automaton has 2996 states and 10721 transitions. Word has length 28 [2021-07-13 20:41:53,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:53,454 INFO L482 AbstractCegarLoop]: Abstraction has 2996 states and 10721 transitions. [2021-07-13 20:41:53,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:53,454 INFO L276 IsEmpty]: Start isEmpty. Operand 2996 states and 10721 transitions. [2021-07-13 20:41:53,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:53,459 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:53,459 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:53,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3976,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:53,675 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:53,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:53,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1124414110, now seen corresponding path program 76 times [2021-07-13 20:41:53,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:53,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117985667] [2021-07-13 20:41:53,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:53,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:53,706 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:53,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:53,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117985667] [2021-07-13 20:41:53,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117985667] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:53,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643988085] [2021-07-13 20:41:53,707 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 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 [2021-07-13 20:41:53,733 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:41:53,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:53,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:41:53,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:53,805 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:53,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643988085] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:53,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:53,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 20:41:53,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707039265] [2021-07-13 20:41:53,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:41:53,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:53,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:41:53,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:41:53,806 INFO L87 Difference]: Start difference. First operand 2996 states and 10721 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:54,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:54,746 INFO L93 Difference]: Finished difference Result 8494 states and 26829 transitions. [2021-07-13 20:41:54,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-07-13 20:41:54,746 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:41:54,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:54,771 INFO L225 Difference]: With dead ends: 8494 [2021-07-13 20:41:54,771 INFO L226 Difference]: Without dead ends: 8494 [2021-07-13 20:41:54,771 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1465 ImplicationChecksByTransitivity, 507.8ms TimeCoverageRelationStatistics Valid=821, Invalid=3085, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 20:41:54,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8494 states. [2021-07-13 20:41:54,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8494 to 3016. [2021-07-13 20:41:54,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3016 states, 3015 states have (on average 3.5830845771144277) internal successors, (10803), 3015 states have internal predecessors, (10803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:54,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3016 states to 3016 states and 10803 transitions. [2021-07-13 20:41:54,865 INFO L78 Accepts]: Start accepts. Automaton has 3016 states and 10803 transitions. Word has length 28 [2021-07-13 20:41:54,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:54,866 INFO L482 AbstractCegarLoop]: Abstraction has 3016 states and 10803 transitions. [2021-07-13 20:41:54,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:54,866 INFO L276 IsEmpty]: Start isEmpty. Operand 3016 states and 10803 transitions. [2021-07-13 20:41:54,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:54,870 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:54,870 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:55,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3977 [2021-07-13 20:41:55,085 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:55,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:55,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1043038022, now seen corresponding path program 77 times [2021-07-13 20:41:55,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:55,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611704885] [2021-07-13 20:41:55,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:55,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:55,117 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:55,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:55,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611704885] [2021-07-13 20:41:55,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611704885] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:55,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320017925] [2021-07-13 20:41:55,117 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 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 [2021-07-13 20:41:55,143 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:41:55,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:55,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:41:55,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:55,216 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:55,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320017925] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:55,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:55,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 20:41:55,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448970687] [2021-07-13 20:41:55,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:41:55,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:55,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:41:55,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:41:55,217 INFO L87 Difference]: Start difference. First operand 3016 states and 10803 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:56,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:56,201 INFO L93 Difference]: Finished difference Result 8003 states and 25641 transitions. [2021-07-13 20:41:56,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-13 20:41:56,202 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:41:56,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:56,238 INFO L225 Difference]: With dead ends: 8003 [2021-07-13 20:41:56,238 INFO L226 Difference]: Without dead ends: 7995 [2021-07-13 20:41:56,238 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 501.1ms TimeCoverageRelationStatistics Valid=776, Invalid=2764, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:41:56,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7995 states. [2021-07-13 20:41:56,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7995 to 2998. [2021-07-13 20:41:56,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2998 states, 2997 states have (on average 3.578912245578912) internal successors, (10726), 2997 states have internal predecessors, (10726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:56,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2998 states to 2998 states and 10726 transitions. [2021-07-13 20:41:56,329 INFO L78 Accepts]: Start accepts. Automaton has 2998 states and 10726 transitions. Word has length 28 [2021-07-13 20:41:56,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:56,329 INFO L482 AbstractCegarLoop]: Abstraction has 2998 states and 10726 transitions. [2021-07-13 20:41:56,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:56,329 INFO L276 IsEmpty]: Start isEmpty. Operand 2998 states and 10726 transitions. [2021-07-13 20:41:56,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:56,334 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:56,334 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:56,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3978 [2021-07-13 20:41:56,549 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:56,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:56,549 INFO L82 PathProgramCache]: Analyzing trace with hash -112380806, now seen corresponding path program 78 times [2021-07-13 20:41:56,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:56,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607503658] [2021-07-13 20:41:56,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:56,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:56,584 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:56,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:56,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607503658] [2021-07-13 20:41:56,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607503658] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:56,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698462910] [2021-07-13 20:41:56,584 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 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 [2021-07-13 20:41:56,611 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:41:56,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:56,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:41:56,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:56,739 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:56,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698462910] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:56,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:56,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 20:41:56,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539092971] [2021-07-13 20:41:56,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:41:56,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:56,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:41:56,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:41:56,739 INFO L87 Difference]: Start difference. First operand 2998 states and 10726 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:57,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:57,693 INFO L93 Difference]: Finished difference Result 7921 states and 25395 transitions. [2021-07-13 20:41:57,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-07-13 20:41:57,699 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:41:57,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:57,738 INFO L225 Difference]: With dead ends: 7921 [2021-07-13 20:41:57,738 INFO L226 Difference]: Without dead ends: 7921 [2021-07-13 20:41:57,739 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 518.7ms TimeCoverageRelationStatistics Valid=820, Invalid=2962, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 20:41:57,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7921 states. [2021-07-13 20:41:57,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7921 to 3014. [2021-07-13 20:41:57,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3014 states, 3013 states have (on average 3.5811483571191505) internal successors, (10790), 3013 states have internal predecessors, (10790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:57,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3014 states to 3014 states and 10790 transitions. [2021-07-13 20:41:57,830 INFO L78 Accepts]: Start accepts. Automaton has 3014 states and 10790 transitions. Word has length 28 [2021-07-13 20:41:57,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:57,830 INFO L482 AbstractCegarLoop]: Abstraction has 3014 states and 10790 transitions. [2021-07-13 20:41:57,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:57,830 INFO L276 IsEmpty]: Start isEmpty. Operand 3014 states and 10790 transitions. [2021-07-13 20:41:57,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:57,834 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:57,834 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:58,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3979,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:58,050 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:58,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:58,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1530658348, now seen corresponding path program 79 times [2021-07-13 20:41:58,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:58,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535425691] [2021-07-13 20:41:58,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:58,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:58,082 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:58,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:58,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535425691] [2021-07-13 20:41:58,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535425691] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:58,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258714023] [2021-07-13 20:41:58,082 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 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 [2021-07-13 20:41:58,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:58,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:41:58,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:58,188 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:58,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258714023] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:58,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:58,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 20:41:58,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652378096] [2021-07-13 20:41:58,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:41:58,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:58,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:41:58,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:41:58,189 INFO L87 Difference]: Start difference. First operand 3014 states and 10790 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:59,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:59,004 INFO L93 Difference]: Finished difference Result 7589 states and 24611 transitions. [2021-07-13 20:41:59,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-13 20:41:59,004 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:41:59,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:59,020 INFO L225 Difference]: With dead ends: 7589 [2021-07-13 20:41:59,020 INFO L226 Difference]: Without dead ends: 7581 [2021-07-13 20:41:59,021 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 443.1ms TimeCoverageRelationStatistics Valid=800, Invalid=2740, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:41:59,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7581 states. [2021-07-13 20:41:59,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7581 to 2771. [2021-07-13 20:41:59,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2771 states, 2770 states have (on average 3.4974729241877256) internal successors, (9688), 2770 states have internal predecessors, (9688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:59,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2771 states to 2771 states and 9688 transitions. [2021-07-13 20:41:59,103 INFO L78 Accepts]: Start accepts. Automaton has 2771 states and 9688 transitions. Word has length 28 [2021-07-13 20:41:59,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:59,103 INFO L482 AbstractCegarLoop]: Abstraction has 2771 states and 9688 transitions. [2021-07-13 20:41:59,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:59,104 INFO L276 IsEmpty]: Start isEmpty. Operand 2771 states and 9688 transitions. [2021-07-13 20:41:59,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:59,108 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:59,108 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:59,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3980 [2021-07-13 20:41:59,321 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:59,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:59,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1614061928, now seen corresponding path program 80 times [2021-07-13 20:41:59,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:59,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913553834] [2021-07-13 20:41:59,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:59,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:59,368 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:59,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:59,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913553834] [2021-07-13 20:41:59,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913553834] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:59,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472727332] [2021-07-13 20:41:59,368 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 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 [2021-07-13 20:41:59,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:41:59,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:59,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:41:59,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:59,480 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:59,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472727332] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:59,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:59,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-13 20:41:59,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585461867] [2021-07-13 20:41:59,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:41:59,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:59,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:41:59,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:41:59,481 INFO L87 Difference]: Start difference. First operand 2771 states and 9688 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:00,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:00,353 INFO L93 Difference]: Finished difference Result 5790 states and 18502 transitions. [2021-07-13 20:42:00,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-13 20:42:00,354 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:42:00,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:00,365 INFO L225 Difference]: With dead ends: 5790 [2021-07-13 20:42:00,365 INFO L226 Difference]: Without dead ends: 5790 [2021-07-13 20:42:00,365 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 517.6ms TimeCoverageRelationStatistics Valid=709, Invalid=2713, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 20:42:00,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5790 states. [2021-07-13 20:42:00,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5790 to 2783. [2021-07-13 20:42:00,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2783 states, 2782 states have (on average 3.4960460100647017) internal successors, (9726), 2782 states have internal predecessors, (9726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:00,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2783 states to 2783 states and 9726 transitions. [2021-07-13 20:42:00,428 INFO L78 Accepts]: Start accepts. Automaton has 2783 states and 9726 transitions. Word has length 28 [2021-07-13 20:42:00,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:00,428 INFO L482 AbstractCegarLoop]: Abstraction has 2783 states and 9726 transitions. [2021-07-13 20:42:00,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:00,428 INFO L276 IsEmpty]: Start isEmpty. Operand 2783 states and 9726 transitions. [2021-07-13 20:42:00,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:00,432 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:00,432 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:00,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3981,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:00,636 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:00,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:00,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1027545192, now seen corresponding path program 81 times [2021-07-13 20:42:00,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:00,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146685404] [2021-07-13 20:42:00,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:00,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:00,670 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:00,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:00,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146685404] [2021-07-13 20:42:00,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146685404] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:00,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109939063] [2021-07-13 20:42:00,671 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 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 [2021-07-13 20:42:00,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:42:00,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:00,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:00,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:00,810 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:00,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109939063] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:00,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:00,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:42:00,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209245877] [2021-07-13 20:42:00,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:42:00,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:00,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:42:00,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:42:00,811 INFO L87 Difference]: Start difference. First operand 2783 states and 9726 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:01,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:01,938 INFO L93 Difference]: Finished difference Result 6569 states and 20497 transitions. [2021-07-13 20:42:01,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-13 20:42:01,938 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:42:01,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:01,950 INFO L225 Difference]: With dead ends: 6569 [2021-07-13 20:42:01,950 INFO L226 Difference]: Without dead ends: 6569 [2021-07-13 20:42:01,951 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1919 ImplicationChecksByTransitivity, 707.7ms TimeCoverageRelationStatistics Valid=1012, Invalid=4244, Unknown=0, NotChecked=0, Total=5256 [2021-07-13 20:42:01,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6569 states. [2021-07-13 20:42:02,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6569 to 2849. [2021-07-13 20:42:02,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2849 states, 2848 states have (on average 3.4912219101123596) internal successors, (9943), 2848 states have internal predecessors, (9943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:02,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2849 states to 2849 states and 9943 transitions. [2021-07-13 20:42:02,017 INFO L78 Accepts]: Start accepts. Automaton has 2849 states and 9943 transitions. Word has length 28 [2021-07-13 20:42:02,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:02,017 INFO L482 AbstractCegarLoop]: Abstraction has 2849 states and 9943 transitions. [2021-07-13 20:42:02,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:02,017 INFO L276 IsEmpty]: Start isEmpty. Operand 2849 states and 9943 transitions. [2021-07-13 20:42:02,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:02,021 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:02,021 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:02,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3982,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:02,222 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:02,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:02,222 INFO L82 PathProgramCache]: Analyzing trace with hash 615493962, now seen corresponding path program 82 times [2021-07-13 20:42:02,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:02,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916058410] [2021-07-13 20:42:02,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:02,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:02,266 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:02,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:02,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916058410] [2021-07-13 20:42:02,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916058410] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:02,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128754384] [2021-07-13 20:42:02,267 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 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 [2021-07-13 20:42:02,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:42:02,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:02,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:02,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:02,396 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:02,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128754384] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:02,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:02,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:42:02,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181937417] [2021-07-13 20:42:02,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:42:02,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:02,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:42:02,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:42:02,397 INFO L87 Difference]: Start difference. First operand 2849 states and 9943 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:03,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:03,459 INFO L93 Difference]: Finished difference Result 6132 states and 19351 transitions. [2021-07-13 20:42:03,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-13 20:42:03,460 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:42:03,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:03,470 INFO L225 Difference]: With dead ends: 6132 [2021-07-13 20:42:03,471 INFO L226 Difference]: Without dead ends: 6128 [2021-07-13 20:42:03,471 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 640.2ms TimeCoverageRelationStatistics Valid=914, Invalid=3508, Unknown=0, NotChecked=0, Total=4422 [2021-07-13 20:42:03,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6128 states. [2021-07-13 20:42:03,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6128 to 2775. [2021-07-13 20:42:03,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2775 states, 2774 states have (on average 3.4870223503965394) internal successors, (9673), 2774 states have internal predecessors, (9673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:03,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2775 states to 2775 states and 9673 transitions. [2021-07-13 20:42:03,536 INFO L78 Accepts]: Start accepts. Automaton has 2775 states and 9673 transitions. Word has length 28 [2021-07-13 20:42:03,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:03,536 INFO L482 AbstractCegarLoop]: Abstraction has 2775 states and 9673 transitions. [2021-07-13 20:42:03,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:03,536 INFO L276 IsEmpty]: Start isEmpty. Operand 2775 states and 9673 transitions. [2021-07-13 20:42:03,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:03,540 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:03,540 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:03,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3983,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:03,756 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:03,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:03,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1194937186, now seen corresponding path program 66 times [2021-07-13 20:42:03,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:03,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307349878] [2021-07-13 20:42:03,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:03,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:03,796 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:03,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:03,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307349878] [2021-07-13 20:42:03,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307349878] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:03,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444412727] [2021-07-13 20:42:03,796 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 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 [2021-07-13 20:42:03,822 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:42:03,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:03,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:03,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:03,900 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:03,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444412727] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:03,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:03,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 20:42:03,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296621482] [2021-07-13 20:42:03,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:42:03,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:03,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:42:03,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:42:03,901 INFO L87 Difference]: Start difference. First operand 2775 states and 9673 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:04,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:04,527 INFO L93 Difference]: Finished difference Result 5268 states and 16907 transitions. [2021-07-13 20:42:04,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:42:04,527 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:42:04,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:04,538 INFO L225 Difference]: With dead ends: 5268 [2021-07-13 20:42:04,538 INFO L226 Difference]: Without dead ends: 5268 [2021-07-13 20:42:04,538 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 355.7ms TimeCoverageRelationStatistics Valid=407, Invalid=1399, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:42:04,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5268 states. [2021-07-13 20:42:04,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5268 to 2775. [2021-07-13 20:42:04,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2775 states, 2774 states have (on average 3.4891852919971162) internal successors, (9679), 2774 states have internal predecessors, (9679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:04,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2775 states to 2775 states and 9679 transitions. [2021-07-13 20:42:04,595 INFO L78 Accepts]: Start accepts. Automaton has 2775 states and 9679 transitions. Word has length 28 [2021-07-13 20:42:04,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:04,595 INFO L482 AbstractCegarLoop]: Abstraction has 2775 states and 9679 transitions. [2021-07-13 20:42:04,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:04,595 INFO L276 IsEmpty]: Start isEmpty. Operand 2775 states and 9679 transitions. [2021-07-13 20:42:04,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:04,599 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:04,599 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:04,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3984,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:04,799 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:04,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:04,800 INFO L82 PathProgramCache]: Analyzing trace with hash -416862576, now seen corresponding path program 67 times [2021-07-13 20:42:04,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:04,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283831109] [2021-07-13 20:42:04,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:04,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:04,846 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:04,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:04,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283831109] [2021-07-13 20:42:04,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283831109] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:04,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517982787] [2021-07-13 20:42:04,846 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 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 [2021-07-13 20:42:04,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:04,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:04,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:04,953 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:04,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517982787] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:04,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:04,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 20:42:04,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245405338] [2021-07-13 20:42:04,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:42:04,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:04,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:42:04,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:42:04,954 INFO L87 Difference]: Start difference. First operand 2775 states and 9679 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:05,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:05,719 INFO L93 Difference]: Finished difference Result 5584 states and 17812 transitions. [2021-07-13 20:42:05,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 20:42:05,719 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:42:05,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:05,730 INFO L225 Difference]: With dead ends: 5584 [2021-07-13 20:42:05,730 INFO L226 Difference]: Without dead ends: 5584 [2021-07-13 20:42:05,730 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 456.5ms TimeCoverageRelationStatistics Valid=638, Invalid=2118, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 20:42:05,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5584 states. [2021-07-13 20:42:05,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5584 to 2766. [2021-07-13 20:42:05,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2766 states, 2765 states have (on average 3.489330922242315) internal successors, (9648), 2765 states have internal predecessors, (9648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:05,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2766 states to 2766 states and 9648 transitions. [2021-07-13 20:42:05,796 INFO L78 Accepts]: Start accepts. Automaton has 2766 states and 9648 transitions. Word has length 28 [2021-07-13 20:42:05,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:05,796 INFO L482 AbstractCegarLoop]: Abstraction has 2766 states and 9648 transitions. [2021-07-13 20:42:05,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:05,796 INFO L276 IsEmpty]: Start isEmpty. Operand 2766 states and 9648 transitions. [2021-07-13 20:42:05,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:05,800 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:05,800 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:06,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3985 [2021-07-13 20:42:06,016 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:06,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:06,017 INFO L82 PathProgramCache]: Analyzing trace with hash -648402224, now seen corresponding path program 68 times [2021-07-13 20:42:06,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:06,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065331529] [2021-07-13 20:42:06,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:06,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:06,051 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:06,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:06,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065331529] [2021-07-13 20:42:06,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065331529] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:06,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048494968] [2021-07-13 20:42:06,052 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 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 [2021-07-13 20:42:06,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:42:06,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:06,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:06,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:06,157 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:06,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048494968] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:06,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:06,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 20:42:06,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964587815] [2021-07-13 20:42:06,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:42:06,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:06,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:42:06,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:42:06,158 INFO L87 Difference]: Start difference. First operand 2766 states and 9648 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:07,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:07,053 INFO L93 Difference]: Finished difference Result 6079 states and 19142 transitions. [2021-07-13 20:42:07,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-07-13 20:42:07,054 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:42:07,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:07,066 INFO L225 Difference]: With dead ends: 6079 [2021-07-13 20:42:07,066 INFO L226 Difference]: Without dead ends: 6079 [2021-07-13 20:42:07,066 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1318 ImplicationChecksByTransitivity, 518.0ms TimeCoverageRelationStatistics Valid=777, Invalid=3005, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 20:42:07,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6079 states. [2021-07-13 20:42:07,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6079 to 2826. [2021-07-13 20:42:07,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2826 states, 2825 states have (on average 3.485309734513274) internal successors, (9846), 2825 states have internal predecessors, (9846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:07,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2826 states to 2826 states and 9846 transitions. [2021-07-13 20:42:07,136 INFO L78 Accepts]: Start accepts. Automaton has 2826 states and 9846 transitions. Word has length 28 [2021-07-13 20:42:07,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:07,136 INFO L482 AbstractCegarLoop]: Abstraction has 2826 states and 9846 transitions. [2021-07-13 20:42:07,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:07,136 INFO L276 IsEmpty]: Start isEmpty. Operand 2826 states and 9846 transitions. [2021-07-13 20:42:07,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:07,139 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:07,140 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:07,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3986,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:07,356 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:07,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:07,356 INFO L82 PathProgramCache]: Analyzing trace with hash -628686410, now seen corresponding path program 69 times [2021-07-13 20:42:07,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:07,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811516211] [2021-07-13 20:42:07,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:07,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:07,389 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:07,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:07,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811516211] [2021-07-13 20:42:07,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811516211] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:07,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372243317] [2021-07-13 20:42:07,390 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 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 [2021-07-13 20:42:07,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:42:07,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:07,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:07,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:07,501 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:07,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372243317] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:07,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:07,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-07-13 20:42:07,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021822787] [2021-07-13 20:42:07,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:42:07,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:07,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:42:07,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:42:07,502 INFO L87 Difference]: Start difference. First operand 2826 states and 9846 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:08,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:08,082 INFO L93 Difference]: Finished difference Result 6807 states and 22904 transitions. [2021-07-13 20:42:08,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:42:08,082 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:42:08,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:08,096 INFO L225 Difference]: With dead ends: 6807 [2021-07-13 20:42:08,097 INFO L226 Difference]: Without dead ends: 6807 [2021-07-13 20:42:08,097 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 393.9ms TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:42:08,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6807 states. [2021-07-13 20:42:08,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6807 to 4024. [2021-07-13 20:42:08,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4024 states, 4023 states have (on average 3.6109868257519264) internal successors, (14527), 4023 states have internal predecessors, (14527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:08,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4024 states to 4024 states and 14527 transitions. [2021-07-13 20:42:08,196 INFO L78 Accepts]: Start accepts. Automaton has 4024 states and 14527 transitions. Word has length 28 [2021-07-13 20:42:08,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:08,196 INFO L482 AbstractCegarLoop]: Abstraction has 4024 states and 14527 transitions. [2021-07-13 20:42:08,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:08,196 INFO L276 IsEmpty]: Start isEmpty. Operand 4024 states and 14527 transitions. [2021-07-13 20:42:08,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:08,203 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:08,203 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:08,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3987 [2021-07-13 20:42:08,419 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:08,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:08,419 INFO L82 PathProgramCache]: Analyzing trace with hash -693223366, now seen corresponding path program 70 times [2021-07-13 20:42:08,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:08,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182533357] [2021-07-13 20:42:08,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:08,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:08,456 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:08,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:08,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182533357] [2021-07-13 20:42:08,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182533357] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:08,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758609727] [2021-07-13 20:42:08,456 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 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 [2021-07-13 20:42:08,480 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:42:08,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:08,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:08,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:08,555 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:08,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758609727] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:08,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:08,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 20:42:08,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607997671] [2021-07-13 20:42:08,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:42:08,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:08,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:42:08,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:42:08,561 INFO L87 Difference]: Start difference. First operand 4024 states and 14527 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:09,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:09,349 INFO L93 Difference]: Finished difference Result 7353 states and 24861 transitions. [2021-07-13 20:42:09,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-13 20:42:09,350 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:42:09,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:09,365 INFO L225 Difference]: With dead ends: 7353 [2021-07-13 20:42:09,366 INFO L226 Difference]: Without dead ends: 7349 [2021-07-13 20:42:09,366 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 474.1ms TimeCoverageRelationStatistics Valid=697, Invalid=2495, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:42:09,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7349 states. [2021-07-13 20:42:09,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7349 to 3916. [2021-07-13 20:42:09,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3916 states, 3915 states have (on average 3.6206896551724137) internal successors, (14175), 3915 states have internal predecessors, (14175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:09,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3916 states to 3916 states and 14175 transitions. [2021-07-13 20:42:09,461 INFO L78 Accepts]: Start accepts. Automaton has 3916 states and 14175 transitions. Word has length 28 [2021-07-13 20:42:09,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:09,461 INFO L482 AbstractCegarLoop]: Abstraction has 3916 states and 14175 transitions. [2021-07-13 20:42:09,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:09,461 INFO L276 IsEmpty]: Start isEmpty. Operand 3916 states and 14175 transitions. [2021-07-13 20:42:09,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:09,467 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:09,467 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:09,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3988,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:09,684 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:09,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:09,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1327034102, now seen corresponding path program 83 times [2021-07-13 20:42:09,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:09,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026908170] [2021-07-13 20:42:09,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:09,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:09,714 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:09,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:09,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026908170] [2021-07-13 20:42:09,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026908170] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:09,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393203683] [2021-07-13 20:42:09,714 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 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 [2021-07-13 20:42:09,740 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:42:09,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:09,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:42:09,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:09,822 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:09,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393203683] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:09,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:09,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-13 20:42:09,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622788872] [2021-07-13 20:42:09,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:42:09,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:09,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:42:09,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:42:09,823 INFO L87 Difference]: Start difference. First operand 3916 states and 14175 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:10,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:10,647 INFO L93 Difference]: Finished difference Result 8141 states and 27286 transitions. [2021-07-13 20:42:10,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 20:42:10,648 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:42:10,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:10,666 INFO L225 Difference]: With dead ends: 8141 [2021-07-13 20:42:10,666 INFO L226 Difference]: Without dead ends: 8132 [2021-07-13 20:42:10,667 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 458.6ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:42:10,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8132 states. [2021-07-13 20:42:10,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8132 to 4360. [2021-07-13 20:42:10,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4360 states, 4359 states have (on average 3.7118605184675384) internal successors, (16180), 4359 states have internal predecessors, (16180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:10,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4360 states to 4360 states and 16180 transitions. [2021-07-13 20:42:10,783 INFO L78 Accepts]: Start accepts. Automaton has 4360 states and 16180 transitions. Word has length 28 [2021-07-13 20:42:10,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:10,783 INFO L482 AbstractCegarLoop]: Abstraction has 4360 states and 16180 transitions. [2021-07-13 20:42:10,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:10,783 INFO L276 IsEmpty]: Start isEmpty. Operand 4360 states and 16180 transitions. [2021-07-13 20:42:10,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:10,790 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:10,790 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:11,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3989,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:11,006 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:11,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:11,006 INFO L82 PathProgramCache]: Analyzing trace with hash -926591794, now seen corresponding path program 84 times [2021-07-13 20:42:11,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:11,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691130567] [2021-07-13 20:42:11,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:11,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:11,036 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:11,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:11,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691130567] [2021-07-13 20:42:11,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691130567] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:11,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526944120] [2021-07-13 20:42:11,036 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 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 [2021-07-13 20:42:11,062 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:42:11,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:11,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:42:11,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:11,149 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:11,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526944120] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:11,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:11,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-13 20:42:11,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026221933] [2021-07-13 20:42:11,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:42:11,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:11,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:42:11,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:42:11,150 INFO L87 Difference]: Start difference. First operand 4360 states and 16180 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:11,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:11,992 INFO L93 Difference]: Finished difference Result 8418 states and 28143 transitions. [2021-07-13 20:42:11,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 20:42:11,992 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:42:11,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:12,011 INFO L225 Difference]: With dead ends: 8418 [2021-07-13 20:42:12,012 INFO L226 Difference]: Without dead ends: 8418 [2021-07-13 20:42:12,012 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 503.6ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:42:12,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8418 states. [2021-07-13 20:42:12,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8418 to 4380. [2021-07-13 20:42:12,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4380 states, 4379 states have (on average 3.69901804064855) internal successors, (16198), 4379 states have internal predecessors, (16198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:12,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4380 states to 4380 states and 16198 transitions. [2021-07-13 20:42:12,126 INFO L78 Accepts]: Start accepts. Automaton has 4380 states and 16198 transitions. Word has length 28 [2021-07-13 20:42:12,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:12,126 INFO L482 AbstractCegarLoop]: Abstraction has 4380 states and 16198 transitions. [2021-07-13 20:42:12,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:12,126 INFO L276 IsEmpty]: Start isEmpty. Operand 4380 states and 16198 transitions. [2021-07-13 20:42:12,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:12,134 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:12,134 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:12,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3990 [2021-07-13 20:42:12,349 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:12,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:12,349 INFO L82 PathProgramCache]: Analyzing trace with hash -2129998084, now seen corresponding path program 85 times [2021-07-13 20:42:12,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:12,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440144963] [2021-07-13 20:42:12,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:12,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:12,388 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:12,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:12,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440144963] [2021-07-13 20:42:12,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440144963] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:12,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373890666] [2021-07-13 20:42:12,389 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 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 [2021-07-13 20:42:12,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:12,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:42:12,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:12,496 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:12,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373890666] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:12,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:12,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:42:12,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119974385] [2021-07-13 20:42:12,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:42:12,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:12,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:42:12,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:42:12,497 INFO L87 Difference]: Start difference. First operand 4380 states and 16198 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-07-13 20:42:12,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:12,913 INFO L93 Difference]: Finished difference Result 7845 states and 27662 transitions. [2021-07-13 20:42:12,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:42:12,913 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 28 [2021-07-13 20:42:12,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:12,935 INFO L225 Difference]: With dead ends: 7845 [2021-07-13 20:42:12,935 INFO L226 Difference]: Without dead ends: 7762 [2021-07-13 20:42:12,935 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 217.7ms TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:42:12,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7762 states. [2021-07-13 20:42:13,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7762 to 5838. [2021-07-13 20:42:13,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5838 states, 5837 states have (on average 3.7627205756381703) internal successors, (21963), 5837 states have internal predecessors, (21963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:13,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5838 states to 5838 states and 21963 transitions. [2021-07-13 20:42:13,073 INFO L78 Accepts]: Start accepts. Automaton has 5838 states and 21963 transitions. Word has length 28 [2021-07-13 20:42:13,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:13,074 INFO L482 AbstractCegarLoop]: Abstraction has 5838 states and 21963 transitions. [2021-07-13 20:42:13,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-07-13 20:42:13,074 INFO L276 IsEmpty]: Start isEmpty. Operand 5838 states and 21963 transitions. [2021-07-13 20:42:13,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:13,084 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:13,084 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:13,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3991 [2021-07-13 20:42:13,297 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:13,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:13,297 INFO L82 PathProgramCache]: Analyzing trace with hash -921983104, now seen corresponding path program 86 times [2021-07-13 20:42:13,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:13,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946728866] [2021-07-13 20:42:13,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:13,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:13,323 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:42:13,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:13,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946728866] [2021-07-13 20:42:13,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946728866] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:13,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453653730] [2021-07-13 20:42:13,323 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 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 [2021-07-13 20:42:13,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:42:13,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:13,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:42:13,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:13,399 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:42:13,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453653730] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:13,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:13,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-07-13 20:42:13,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129886480] [2021-07-13 20:42:13,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:42:13,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:13,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:42:13,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:42:13,401 INFO L87 Difference]: Start difference. First operand 5838 states and 21963 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 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) [2021-07-13 20:42:13,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:13,586 INFO L93 Difference]: Finished difference Result 8103 states and 28515 transitions. [2021-07-13 20:42:13,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:42:13,587 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 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 28 [2021-07-13 20:42:13,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:13,608 INFO L225 Difference]: With dead ends: 8103 [2021-07-13 20:42:13,609 INFO L226 Difference]: Without dead ends: 8103 [2021-07-13 20:42:13,609 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 111.6ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:42:13,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8103 states. [2021-07-13 20:42:13,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8103 to 5980. [2021-07-13 20:42:13,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5980 states, 5979 states have (on average 3.7395885599598597) internal successors, (22359), 5979 states have internal predecessors, (22359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:13,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5980 states to 5980 states and 22359 transitions. [2021-07-13 20:42:13,768 INFO L78 Accepts]: Start accepts. Automaton has 5980 states and 22359 transitions. Word has length 28 [2021-07-13 20:42:13,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:13,768 INFO L482 AbstractCegarLoop]: Abstraction has 5980 states and 22359 transitions. [2021-07-13 20:42:13,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 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) [2021-07-13 20:42:13,768 INFO L276 IsEmpty]: Start isEmpty. Operand 5980 states and 22359 transitions. [2021-07-13 20:42:13,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:13,778 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:13,778 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:13,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3992,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:13,985 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:13,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:13,985 INFO L82 PathProgramCache]: Analyzing trace with hash 8216640, now seen corresponding path program 87 times [2021-07-13 20:42:13,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:13,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447423571] [2021-07-13 20:42:13,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:13,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:14,022 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:14,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:14,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447423571] [2021-07-13 20:42:14,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447423571] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:14,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229621686] [2021-07-13 20:42:14,023 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 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 [2021-07-13 20:42:14,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:42:14,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:14,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:14,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:14,113 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:14,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229621686] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:14,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:14,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-07-13 20:42:14,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607194673] [2021-07-13 20:42:14,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:42:14,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:14,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:42:14,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:42:14,114 INFO L87 Difference]: Start difference. First operand 5980 states and 22359 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-07-13 20:42:14,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:14,807 INFO L93 Difference]: Finished difference Result 12480 states and 43435 transitions. [2021-07-13 20:42:14,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-13 20:42:14,807 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 28 [2021-07-13 20:42:14,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:14,839 INFO L225 Difference]: With dead ends: 12480 [2021-07-13 20:42:14,840 INFO L226 Difference]: Without dead ends: 12480 [2021-07-13 20:42:14,840 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 400.1ms TimeCoverageRelationStatistics Valid=657, Invalid=2205, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:42:14,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12480 states. [2021-07-13 20:42:15,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12480 to 6653. [2021-07-13 20:42:15,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6653 states, 6652 states have (on average 3.753607937462417) internal successors, (24969), 6652 states have internal predecessors, (24969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:15,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6653 states to 6653 states and 24969 transitions. [2021-07-13 20:42:15,033 INFO L78 Accepts]: Start accepts. Automaton has 6653 states and 24969 transitions. Word has length 28 [2021-07-13 20:42:15,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:15,033 INFO L482 AbstractCegarLoop]: Abstraction has 6653 states and 24969 transitions. [2021-07-13 20:42:15,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-07-13 20:42:15,034 INFO L276 IsEmpty]: Start isEmpty. Operand 6653 states and 24969 transitions. [2021-07-13 20:42:15,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:15,045 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:15,045 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:15,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3993,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:15,256 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:15,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:15,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1910896092, now seen corresponding path program 88 times [2021-07-13 20:42:15,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:15,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519223405] [2021-07-13 20:42:15,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:15,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:15,294 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:15,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:15,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519223405] [2021-07-13 20:42:15,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519223405] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:15,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95574046] [2021-07-13 20:42:15,295 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 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 [2021-07-13 20:42:15,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:42:15,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:15,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:15,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:15,380 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:15,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95574046] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:15,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:15,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-07-13 20:42:15,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894222176] [2021-07-13 20:42:15,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:42:15,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:15,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:42:15,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:42:15,381 INFO L87 Difference]: Start difference. First operand 6653 states and 24969 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 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) [2021-07-13 20:42:16,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:16,163 INFO L93 Difference]: Finished difference Result 12633 states and 43998 transitions. [2021-07-13 20:42:16,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 20:42:16,164 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 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 28 [2021-07-13 20:42:16,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:16,196 INFO L225 Difference]: With dead ends: 12633 [2021-07-13 20:42:16,196 INFO L226 Difference]: Without dead ends: 12633 [2021-07-13 20:42:16,197 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 386.0ms TimeCoverageRelationStatistics Valid=542, Invalid=1908, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:42:16,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12633 states. [2021-07-13 20:42:16,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12633 to 6881. [2021-07-13 20:42:16,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6881 states, 6880 states have (on average 3.734156976744186) internal successors, (25691), 6880 states have internal predecessors, (25691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:16,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6881 states to 6881 states and 25691 transitions. [2021-07-13 20:42:16,378 INFO L78 Accepts]: Start accepts. Automaton has 6881 states and 25691 transitions. Word has length 28 [2021-07-13 20:42:16,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:16,378 INFO L482 AbstractCegarLoop]: Abstraction has 6881 states and 25691 transitions. [2021-07-13 20:42:16,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 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) [2021-07-13 20:42:16,379 INFO L276 IsEmpty]: Start isEmpty. Operand 6881 states and 25691 transitions. [2021-07-13 20:42:16,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:16,390 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:16,390 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:16,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3994 [2021-07-13 20:42:16,606 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:16,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:16,606 INFO L82 PathProgramCache]: Analyzing trace with hash 827873436, now seen corresponding path program 89 times [2021-07-13 20:42:16,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:16,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372757384] [2021-07-13 20:42:16,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:16,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:16,632 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:16,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:16,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372757384] [2021-07-13 20:42:16,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372757384] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:16,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013823648] [2021-07-13 20:42:16,632 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 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 [2021-07-13 20:42:16,657 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:42:16,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:16,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:42:16,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:16,715 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:16,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013823648] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:16,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:16,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:42:16,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252985162] [2021-07-13 20:42:16,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:42:16,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:16,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:42:16,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:42:16,716 INFO L87 Difference]: Start difference. First operand 6881 states and 25691 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2021-07-13 20:42:17,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:17,080 INFO L93 Difference]: Finished difference Result 9357 states and 33618 transitions. [2021-07-13 20:42:17,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:42:17,081 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 28 [2021-07-13 20:42:17,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:17,101 INFO L225 Difference]: With dead ends: 9357 [2021-07-13 20:42:17,101 INFO L226 Difference]: Without dead ends: 9327 [2021-07-13 20:42:17,101 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 190.9ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:42:17,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9327 states. [2021-07-13 20:42:17,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9327 to 7728. [2021-07-13 20:42:17,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7728 states, 7727 states have (on average 3.760450368836547) internal successors, (29057), 7727 states have internal predecessors, (29057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:17,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7728 states to 7728 states and 29057 transitions. [2021-07-13 20:42:17,308 INFO L78 Accepts]: Start accepts. Automaton has 7728 states and 29057 transitions. Word has length 28 [2021-07-13 20:42:17,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:17,308 INFO L482 AbstractCegarLoop]: Abstraction has 7728 states and 29057 transitions. [2021-07-13 20:42:17,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2021-07-13 20:42:17,308 INFO L276 IsEmpty]: Start isEmpty. Operand 7728 states and 29057 transitions. [2021-07-13 20:42:17,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:17,321 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:17,321 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:17,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3995,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:17,530 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:17,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:17,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1996015742, now seen corresponding path program 90 times [2021-07-13 20:42:17,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:17,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676307794] [2021-07-13 20:42:17,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:17,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:17,555 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:42:17,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:17,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676307794] [2021-07-13 20:42:17,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676307794] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:17,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436672917] [2021-07-13 20:42:17,555 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 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 [2021-07-13 20:42:17,580 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:42:17,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:17,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:42:17,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:17,641 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:42:17,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436672917] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:17,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:17,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:42:17,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914784541] [2021-07-13 20:42:17,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:42:17,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:17,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:42:17,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:42:17,641 INFO L87 Difference]: Start difference. First operand 7728 states and 29057 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2021-07-13 20:42:18,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:18,052 INFO L93 Difference]: Finished difference Result 9961 states and 35609 transitions. [2021-07-13 20:42:18,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:42:18,053 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 28 [2021-07-13 20:42:18,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:18,075 INFO L225 Difference]: With dead ends: 9961 [2021-07-13 20:42:18,076 INFO L226 Difference]: Without dead ends: 9961 [2021-07-13 20:42:18,076 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 198.2ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:42:18,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9961 states. [2021-07-13 20:42:18,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9961 to 7768. [2021-07-13 20:42:18,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7768 states, 7767 states have (on average 3.756405304493369) internal successors, (29176), 7767 states have internal predecessors, (29176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:18,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7768 states to 7768 states and 29176 transitions. [2021-07-13 20:42:18,243 INFO L78 Accepts]: Start accepts. Automaton has 7768 states and 29176 transitions. Word has length 28 [2021-07-13 20:42:18,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:18,244 INFO L482 AbstractCegarLoop]: Abstraction has 7768 states and 29176 transitions. [2021-07-13 20:42:18,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2021-07-13 20:42:18,244 INFO L276 IsEmpty]: Start isEmpty. Operand 7768 states and 29176 transitions. [2021-07-13 20:42:18,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:18,257 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:18,257 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:18,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3996,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:18,471 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:18,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:18,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1866074950, now seen corresponding path program 91 times [2021-07-13 20:42:18,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:18,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488151780] [2021-07-13 20:42:18,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:18,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:18,523 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:42:18,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:18,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488151780] [2021-07-13 20:42:18,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488151780] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:18,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780248285] [2021-07-13 20:42:18,523 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 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 [2021-07-13 20:42:18,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:18,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:18,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:18,596 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:42:18,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780248285] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:18,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:18,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-07-13 20:42:18,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958516006] [2021-07-13 20:42:18,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:42:18,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:18,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:42:18,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:42:18,597 INFO L87 Difference]: Start difference. First operand 7768 states and 29176 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 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) [2021-07-13 20:42:19,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:19,276 INFO L93 Difference]: Finished difference Result 13358 states and 47391 transitions. [2021-07-13 20:42:19,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:42:19,277 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 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 28 [2021-07-13 20:42:19,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:19,310 INFO L225 Difference]: With dead ends: 13358 [2021-07-13 20:42:19,310 INFO L226 Difference]: Without dead ends: 13354 [2021-07-13 20:42:19,311 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 376.4ms TimeCoverageRelationStatistics Valid=474, Invalid=1596, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:42:19,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13354 states. [2021-07-13 20:42:19,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13354 to 7674. [2021-07-13 20:42:19,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7674 states, 7673 states have (on average 3.760328424345106) internal successors, (28853), 7673 states have internal predecessors, (28853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:19,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7674 states to 7674 states and 28853 transitions. [2021-07-13 20:42:19,519 INFO L78 Accepts]: Start accepts. Automaton has 7674 states and 28853 transitions. Word has length 28 [2021-07-13 20:42:19,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:19,519 INFO L482 AbstractCegarLoop]: Abstraction has 7674 states and 28853 transitions. [2021-07-13 20:42:19,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 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) [2021-07-13 20:42:19,519 INFO L276 IsEmpty]: Start isEmpty. Operand 7674 states and 28853 transitions. [2021-07-13 20:42:19,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:19,532 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:19,532 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:19,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3997,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:19,745 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:19,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:19,745 INFO L82 PathProgramCache]: Analyzing trace with hash 970254134, now seen corresponding path program 92 times [2021-07-13 20:42:19,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:19,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281981826] [2021-07-13 20:42:19,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:19,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:19,776 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:19,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:19,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281981826] [2021-07-13 20:42:19,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281981826] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:19,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455118228] [2021-07-13 20:42:19,776 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 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 [2021-07-13 20:42:19,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:42:19,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:19,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:42:19,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:19,871 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:19,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455118228] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:19,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:19,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:42:19,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622299176] [2021-07-13 20:42:19,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:42:19,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:19,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:42:19,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:42:19,872 INFO L87 Difference]: Start difference. First operand 7674 states and 28853 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-07-13 20:42:20,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:20,351 INFO L93 Difference]: Finished difference Result 10180 states and 36418 transitions. [2021-07-13 20:42:20,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:42:20,352 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 28 [2021-07-13 20:42:20,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:20,375 INFO L225 Difference]: With dead ends: 10180 [2021-07-13 20:42:20,375 INFO L226 Difference]: Without dead ends: 10180 [2021-07-13 20:42:20,375 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 251.2ms TimeCoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:42:20,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10180 states. [2021-07-13 20:42:20,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10180 to 7620. [2021-07-13 20:42:20,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7620 states, 7619 states have (on average 3.7531172069825436) internal successors, (28595), 7619 states have internal predecessors, (28595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:20,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7620 states to 7620 states and 28595 transitions. [2021-07-13 20:42:20,583 INFO L78 Accepts]: Start accepts. Automaton has 7620 states and 28595 transitions. Word has length 28 [2021-07-13 20:42:20,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:20,583 INFO L482 AbstractCegarLoop]: Abstraction has 7620 states and 28595 transitions. [2021-07-13 20:42:20,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-07-13 20:42:20,583 INFO L276 IsEmpty]: Start isEmpty. Operand 7620 states and 28595 transitions. [2021-07-13 20:42:20,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:20,597 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:20,597 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:20,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3998,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:20,813 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:20,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:20,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1831555688, now seen corresponding path program 93 times [2021-07-13 20:42:20,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:20,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446826232] [2021-07-13 20:42:20,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:20,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:20,852 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:20,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:20,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446826232] [2021-07-13 20:42:20,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446826232] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:20,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380196200] [2021-07-13 20:42:20,853 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 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 [2021-07-13 20:42:20,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:42:20,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:20,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:20,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:20,943 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:20,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380196200] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:20,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:20,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-07-13 20:42:20,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550068934] [2021-07-13 20:42:20,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:42:20,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:20,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:42:20,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:42:20,944 INFO L87 Difference]: Start difference. First operand 7620 states and 28595 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-07-13 20:42:21,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:21,680 INFO L93 Difference]: Finished difference Result 13241 states and 46888 transitions. [2021-07-13 20:42:21,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 20:42:21,681 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 28 [2021-07-13 20:42:21,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:21,714 INFO L225 Difference]: With dead ends: 13241 [2021-07-13 20:42:21,714 INFO L226 Difference]: Without dead ends: 13229 [2021-07-13 20:42:21,715 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 396.2ms TimeCoverageRelationStatistics Valid=564, Invalid=1986, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:42:21,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13229 states. [2021-07-13 20:42:21,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13229 to 7620. [2021-07-13 20:42:21,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7620 states, 7619 states have (on average 3.7520672004200026) internal successors, (28587), 7619 states have internal predecessors, (28587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:21,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7620 states to 7620 states and 28587 transitions. [2021-07-13 20:42:21,923 INFO L78 Accepts]: Start accepts. Automaton has 7620 states and 28587 transitions. Word has length 28 [2021-07-13 20:42:21,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:21,923 INFO L482 AbstractCegarLoop]: Abstraction has 7620 states and 28587 transitions. [2021-07-13 20:42:21,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-07-13 20:42:21,923 INFO L276 IsEmpty]: Start isEmpty. Operand 7620 states and 28587 transitions. [2021-07-13 20:42:21,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:21,936 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:21,936 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:22,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3999 [2021-07-13 20:42:22,153 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:22,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:22,153 INFO L82 PathProgramCache]: Analyzing trace with hash 695130692, now seen corresponding path program 94 times [2021-07-13 20:42:22,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:22,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369910450] [2021-07-13 20:42:22,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:22,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:22,190 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:22,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:22,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369910450] [2021-07-13 20:42:22,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369910450] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:22,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594678141] [2021-07-13 20:42:22,191 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 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 [2021-07-13 20:42:22,216 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:42:22,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:22,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:22,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:22,336 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:22,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594678141] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:22,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:22,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-13 20:42:22,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074066428] [2021-07-13 20:42:22,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:42:22,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:22,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:42:22,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:42:22,337 INFO L87 Difference]: Start difference. First operand 7620 states and 28587 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:23,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:23,578 INFO L93 Difference]: Finished difference Result 20083 states and 70057 transitions. [2021-07-13 20:42:23,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-07-13 20:42:23,578 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:42:23,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:23,631 INFO L225 Difference]: With dead ends: 20083 [2021-07-13 20:42:23,631 INFO L226 Difference]: Without dead ends: 20083 [2021-07-13 20:42:23,632 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 738.2ms TimeCoverageRelationStatistics Valid=1218, Invalid=4482, Unknown=0, NotChecked=0, Total=5700 [2021-07-13 20:42:23,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20083 states. [2021-07-13 20:42:23,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20083 to 10419. [2021-07-13 20:42:24,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10419 states, 10418 states have (on average 3.7977538875023997) internal successors, (39565), 10418 states have internal predecessors, (39565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:24,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10419 states to 10419 states and 39565 transitions. [2021-07-13 20:42:24,043 INFO L78 Accepts]: Start accepts. Automaton has 10419 states and 39565 transitions. Word has length 28 [2021-07-13 20:42:24,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:24,043 INFO L482 AbstractCegarLoop]: Abstraction has 10419 states and 39565 transitions. [2021-07-13 20:42:24,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:24,043 INFO L276 IsEmpty]: Start isEmpty. Operand 10419 states and 39565 transitions. [2021-07-13 20:42:24,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:24,061 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:24,061 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:24,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4000 [2021-07-13 20:42:24,278 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:24,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:24,278 INFO L82 PathProgramCache]: Analyzing trace with hash 776506780, now seen corresponding path program 95 times [2021-07-13 20:42:24,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:24,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264877489] [2021-07-13 20:42:24,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:24,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:24,315 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:24,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:24,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264877489] [2021-07-13 20:42:24,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264877489] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:24,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155664003] [2021-07-13 20:42:24,315 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 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 [2021-07-13 20:42:24,341 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:42:24,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:24,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:24,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:24,411 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:24,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155664003] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:24,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:24,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-13 20:42:24,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764687935] [2021-07-13 20:42:24,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:42:24,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:24,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:42:24,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:42:24,412 INFO L87 Difference]: Start difference. First operand 10419 states and 39565 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:25,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:25,536 INFO L93 Difference]: Finished difference Result 19333 states and 68102 transitions. [2021-07-13 20:42:25,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-13 20:42:25,537 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:42:25,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:25,591 INFO L225 Difference]: With dead ends: 19333 [2021-07-13 20:42:25,591 INFO L226 Difference]: Without dead ends: 19321 [2021-07-13 20:42:25,592 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1736 ImplicationChecksByTransitivity, 634.3ms TimeCoverageRelationStatistics Valid=1059, Invalid=3771, Unknown=0, NotChecked=0, Total=4830 [2021-07-13 20:42:25,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19321 states. [2021-07-13 20:42:26,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19321 to 10233. [2021-07-13 20:42:26,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10233 states, 10232 states have (on average 3.8045347928068804) internal successors, (38928), 10232 states have internal predecessors, (38928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:26,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10233 states to 10233 states and 38928 transitions. [2021-07-13 20:42:26,073 INFO L78 Accepts]: Start accepts. Automaton has 10233 states and 38928 transitions. Word has length 28 [2021-07-13 20:42:26,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:26,073 INFO L482 AbstractCegarLoop]: Abstraction has 10233 states and 38928 transitions. [2021-07-13 20:42:26,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:26,073 INFO L276 IsEmpty]: Start isEmpty. Operand 10233 states and 38928 transitions. [2021-07-13 20:42:26,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:26,090 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:26,090 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:26,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4001,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:26,306 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:26,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:26,306 INFO L82 PathProgramCache]: Analyzing trace with hash -738585192, now seen corresponding path program 96 times [2021-07-13 20:42:26,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:26,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359749165] [2021-07-13 20:42:26,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:26,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:26,343 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:26,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:26,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359749165] [2021-07-13 20:42:26,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359749165] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:26,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488844752] [2021-07-13 20:42:26,344 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 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 [2021-07-13 20:42:26,370 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:42:26,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:26,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:26,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:26,435 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:26,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488844752] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:26,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:26,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-13 20:42:26,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383442250] [2021-07-13 20:42:26,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:42:26,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:26,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:42:26,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:42:26,436 INFO L87 Difference]: Start difference. First operand 10233 states and 38928 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:27,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:27,503 INFO L93 Difference]: Finished difference Result 19147 states and 67441 transitions. [2021-07-13 20:42:27,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-13 20:42:27,504 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:42:27,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:27,549 INFO L225 Difference]: With dead ends: 19147 [2021-07-13 20:42:27,549 INFO L226 Difference]: Without dead ends: 19111 [2021-07-13 20:42:27,550 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1449 ImplicationChecksByTransitivity, 587.0ms TimeCoverageRelationStatistics Valid=906, Invalid=3384, Unknown=0, NotChecked=0, Total=4290 [2021-07-13 20:42:27,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19111 states. [2021-07-13 20:42:27,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19111 to 10277. [2021-07-13 20:42:27,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10277 states, 10276 states have (on average 3.802646944336318) internal successors, (39076), 10276 states have internal predecessors, (39076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:27,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10277 states to 10277 states and 39076 transitions. [2021-07-13 20:42:27,908 INFO L78 Accepts]: Start accepts. Automaton has 10277 states and 39076 transitions. Word has length 28 [2021-07-13 20:42:27,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:27,908 INFO L482 AbstractCegarLoop]: Abstraction has 10277 states and 39076 transitions. [2021-07-13 20:42:27,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:27,908 INFO L276 IsEmpty]: Start isEmpty. Operand 10277 states and 39076 transitions. [2021-07-13 20:42:27,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:27,925 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:27,925 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:28,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4002 [2021-07-13 20:42:28,133 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:28,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:28,133 INFO L82 PathProgramCache]: Analyzing trace with hash 858541524, now seen corresponding path program 97 times [2021-07-13 20:42:28,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:28,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414251127] [2021-07-13 20:42:28,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:28,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:28,170 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:28,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:28,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414251127] [2021-07-13 20:42:28,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414251127] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:28,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682646318] [2021-07-13 20:42:28,171 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 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 [2021-07-13 20:42:28,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:28,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:28,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:28,285 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:28,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682646318] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:28,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:28,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-13 20:42:28,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139718752] [2021-07-13 20:42:28,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:42:28,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:28,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:42:28,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:42:28,303 INFO L87 Difference]: Start difference. First operand 10277 states and 39076 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:29,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:29,764 INFO L93 Difference]: Finished difference Result 19074 states and 67295 transitions. [2021-07-13 20:42:29,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-07-13 20:42:29,764 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:42:29,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:29,817 INFO L225 Difference]: With dead ends: 19074 [2021-07-13 20:42:29,817 INFO L226 Difference]: Without dead ends: 19074 [2021-07-13 20:42:29,817 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2648 ImplicationChecksByTransitivity, 854.8ms TimeCoverageRelationStatistics Valid=1494, Invalid=5646, Unknown=0, NotChecked=0, Total=7140 [2021-07-13 20:42:29,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19074 states. [2021-07-13 20:42:30,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19074 to 10473. [2021-07-13 20:42:30,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10473 states, 10472 states have (on average 3.793544690603514) internal successors, (39726), 10472 states have internal predecessors, (39726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:30,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10473 states to 10473 states and 39726 transitions. [2021-07-13 20:42:30,133 INFO L78 Accepts]: Start accepts. Automaton has 10473 states and 39726 transitions. Word has length 28 [2021-07-13 20:42:30,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:30,133 INFO L482 AbstractCegarLoop]: Abstraction has 10473 states and 39726 transitions. [2021-07-13 20:42:30,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:30,133 INFO L276 IsEmpty]: Start isEmpty. Operand 10473 states and 39726 transitions. [2021-07-13 20:42:30,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:30,151 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:30,151 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:30,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4003,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:30,365 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:30,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:30,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1793386618, now seen corresponding path program 98 times [2021-07-13 20:42:30,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:30,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891311568] [2021-07-13 20:42:30,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:30,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:30,403 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:30,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:30,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891311568] [2021-07-13 20:42:30,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891311568] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:30,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720365918] [2021-07-13 20:42:30,403 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 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 [2021-07-13 20:42:30,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:42:30,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:30,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:30,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:30,528 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:30,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720365918] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:30,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:30,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-13 20:42:30,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008831750] [2021-07-13 20:42:30,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:42:30,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:30,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:42:30,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:42:30,529 INFO L87 Difference]: Start difference. First operand 10473 states and 39726 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:31,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:31,882 INFO L93 Difference]: Finished difference Result 18684 states and 66217 transitions. [2021-07-13 20:42:31,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-13 20:42:31,882 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:42:31,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:31,941 INFO L225 Difference]: With dead ends: 18684 [2021-07-13 20:42:31,942 INFO L226 Difference]: Without dead ends: 18672 [2021-07-13 20:42:31,942 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2073 ImplicationChecksByTransitivity, 775.5ms TimeCoverageRelationStatistics Valid=1305, Invalid=4547, Unknown=0, NotChecked=0, Total=5852 [2021-07-13 20:42:31,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18672 states. [2021-07-13 20:42:32,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18672 to 10355. [2021-07-13 20:42:32,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10355 states, 10354 states have (on average 3.7980490631639947) internal successors, (39325), 10354 states have internal predecessors, (39325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:32,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10355 states to 10355 states and 39325 transitions. [2021-07-13 20:42:32,293 INFO L78 Accepts]: Start accepts. Automaton has 10355 states and 39325 transitions. Word has length 28 [2021-07-13 20:42:32,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:32,293 INFO L482 AbstractCegarLoop]: Abstraction has 10355 states and 39325 transitions. [2021-07-13 20:42:32,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:32,294 INFO L276 IsEmpty]: Start isEmpty. Operand 10355 states and 39325 transitions. [2021-07-13 20:42:32,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:32,311 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:32,311 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:32,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4004,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:32,527 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:32,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:32,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1234123500, now seen corresponding path program 99 times [2021-07-13 20:42:32,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:32,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371459553] [2021-07-13 20:42:32,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:32,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:32,568 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:32,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:32,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371459553] [2021-07-13 20:42:32,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371459553] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:32,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891587022] [2021-07-13 20:42:32,568 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 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 [2021-07-13 20:42:32,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:42:32,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:32,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:32,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:32,675 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:32,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891587022] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:32,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:32,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-07-13 20:42:32,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733060535] [2021-07-13 20:42:32,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:42:32,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:32,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:42:32,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:42:32,676 INFO L87 Difference]: Start difference. First operand 10355 states and 39325 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:33,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:33,856 INFO L93 Difference]: Finished difference Result 17924 states and 64133 transitions. [2021-07-13 20:42:33,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-13 20:42:33,857 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:42:33,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:33,903 INFO L225 Difference]: With dead ends: 17924 [2021-07-13 20:42:33,903 INFO L226 Difference]: Without dead ends: 17888 [2021-07-13 20:42:33,903 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1442 ImplicationChecksByTransitivity, 644.0ms TimeCoverageRelationStatistics Valid=951, Invalid=3471, Unknown=0, NotChecked=0, Total=4422 [2021-07-13 20:42:33,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17888 states. [2021-07-13 20:42:34,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17888 to 10379. [2021-07-13 20:42:34,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10379 states, 10378 states have (on average 3.7969743688571977) internal successors, (39405), 10378 states have internal predecessors, (39405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:34,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10379 states to 10379 states and 39405 transitions. [2021-07-13 20:42:34,289 INFO L78 Accepts]: Start accepts. Automaton has 10379 states and 39405 transitions. Word has length 28 [2021-07-13 20:42:34,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:34,290 INFO L482 AbstractCegarLoop]: Abstraction has 10379 states and 39405 transitions. [2021-07-13 20:42:34,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:34,290 INFO L276 IsEmpty]: Start isEmpty. Operand 10379 states and 39405 transitions. [2021-07-13 20:42:34,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:34,308 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:34,308 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:34,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4005,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:34,524 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:34,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:34,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1584729920, now seen corresponding path program 100 times [2021-07-13 20:42:34,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:34,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793811036] [2021-07-13 20:42:34,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:34,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:34,559 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:42:34,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:34,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793811036] [2021-07-13 20:42:34,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793811036] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:34,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61910014] [2021-07-13 20:42:34,559 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 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 [2021-07-13 20:42:34,599 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:42:34,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:34,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:34,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:34,696 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:34,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61910014] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:34,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:34,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:42:34,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973309917] [2021-07-13 20:42:34,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:42:34,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:34,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:42:34,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:42:34,697 INFO L87 Difference]: Start difference. First operand 10379 states and 39405 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:36,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:36,002 INFO L93 Difference]: Finished difference Result 26041 states and 92685 transitions. [2021-07-13 20:42:36,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-07-13 20:42:36,003 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:42:36,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:36,079 INFO L225 Difference]: With dead ends: 26041 [2021-07-13 20:42:36,080 INFO L226 Difference]: Without dead ends: 26041 [2021-07-13 20:42:36,080 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2318 ImplicationChecksByTransitivity, 732.7ms TimeCoverageRelationStatistics Valid=1326, Invalid=4680, Unknown=0, NotChecked=0, Total=6006 [2021-07-13 20:42:36,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26041 states. [2021-07-13 20:42:36,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26041 to 10669. [2021-07-13 20:42:36,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10669 states, 10668 states have (on average 3.8225534308211473) internal successors, (40779), 10668 states have internal predecessors, (40779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:36,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10669 states to 10669 states and 40779 transitions. [2021-07-13 20:42:36,552 INFO L78 Accepts]: Start accepts. Automaton has 10669 states and 40779 transitions. Word has length 28 [2021-07-13 20:42:36,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:36,553 INFO L482 AbstractCegarLoop]: Abstraction has 10669 states and 40779 transitions. [2021-07-13 20:42:36,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:36,553 INFO L276 IsEmpty]: Start isEmpty. Operand 10669 states and 40779 transitions. [2021-07-13 20:42:36,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:36,570 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:36,570 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:36,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4006 [2021-07-13 20:42:36,785 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:36,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:36,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1017777840, now seen corresponding path program 101 times [2021-07-13 20:42:36,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:36,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463199815] [2021-07-13 20:42:36,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:36,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:36,817 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:42:36,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:36,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463199815] [2021-07-13 20:42:36,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463199815] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:36,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571313799] [2021-07-13 20:42:36,818 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 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 [2021-07-13 20:42:36,844 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:42:36,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:36,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:36,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:36,948 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:36,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571313799] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:36,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:36,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:42:36,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389705426] [2021-07-13 20:42:36,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:42:36,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:36,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:42:36,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:42:36,949 INFO L87 Difference]: Start difference. First operand 10669 states and 40779 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:38,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:38,333 INFO L93 Difference]: Finished difference Result 25481 states and 91317 transitions. [2021-07-13 20:42:38,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-07-13 20:42:38,333 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:42:38,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:38,413 INFO L225 Difference]: With dead ends: 25481 [2021-07-13 20:42:38,413 INFO L226 Difference]: Without dead ends: 25481 [2021-07-13 20:42:38,414 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2286 ImplicationChecksByTransitivity, 791.9ms TimeCoverageRelationStatistics Valid=1315, Invalid=4537, Unknown=0, NotChecked=0, Total=5852 [2021-07-13 20:42:38,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25481 states. [2021-07-13 20:42:38,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25481 to 10571. [2021-07-13 20:42:38,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10571 states, 10570 states have (on average 3.809744560075686) internal successors, (40269), 10570 states have internal predecessors, (40269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:38,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10571 states to 10571 states and 40269 transitions. [2021-07-13 20:42:38,848 INFO L78 Accepts]: Start accepts. Automaton has 10571 states and 40269 transitions. Word has length 28 [2021-07-13 20:42:38,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:38,848 INFO L482 AbstractCegarLoop]: Abstraction has 10571 states and 40269 transitions. [2021-07-13 20:42:38,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:38,848 INFO L276 IsEmpty]: Start isEmpty. Operand 10571 states and 40269 transitions. [2021-07-13 20:42:38,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:38,866 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:38,866 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:39,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4007,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:39,082 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:39,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:39,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1216329654, now seen corresponding path program 102 times [2021-07-13 20:42:39,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:39,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117964854] [2021-07-13 20:42:39,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:39,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:39,114 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:42:39,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:39,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117964854] [2021-07-13 20:42:39,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117964854] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:39,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002014377] [2021-07-13 20:42:39,115 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 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 [2021-07-13 20:42:39,141 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:42:39,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:39,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:39,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:39,237 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:39,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002014377] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:39,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:39,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-13 20:42:39,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557105631] [2021-07-13 20:42:39,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:42:39,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:39,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:42:39,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:42:39,238 INFO L87 Difference]: Start difference. First operand 10571 states and 40269 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:40,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:40,153 INFO L93 Difference]: Finished difference Result 20226 states and 72726 transitions. [2021-07-13 20:42:40,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 20:42:40,154 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:42:40,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:40,215 INFO L225 Difference]: With dead ends: 20226 [2021-07-13 20:42:40,215 INFO L226 Difference]: Without dead ends: 20226 [2021-07-13 20:42:40,215 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 484.7ms TimeCoverageRelationStatistics Valid=668, Invalid=2194, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:42:40,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20226 states. [2021-07-13 20:42:40,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20226 to 10580. [2021-07-13 20:42:40,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10580 states, 10579 states have (on average 3.8086775687683145) internal successors, (40292), 10579 states have internal predecessors, (40292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:40,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10580 states to 10580 states and 40292 transitions. [2021-07-13 20:42:40,712 INFO L78 Accepts]: Start accepts. Automaton has 10580 states and 40292 transitions. Word has length 28 [2021-07-13 20:42:40,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:40,712 INFO L482 AbstractCegarLoop]: Abstraction has 10580 states and 40292 transitions. [2021-07-13 20:42:40,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:40,712 INFO L276 IsEmpty]: Start isEmpty. Operand 10580 states and 40292 transitions. [2021-07-13 20:42:40,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:40,731 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:40,731 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:40,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4008,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:40,937 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:40,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:40,937 INFO L82 PathProgramCache]: Analyzing trace with hash 541607776, now seen corresponding path program 103 times [2021-07-13 20:42:40,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:40,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086240551] [2021-07-13 20:42:40,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:40,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:40,970 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:42:40,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:40,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086240551] [2021-07-13 20:42:40,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086240551] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:40,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149063641] [2021-07-13 20:42:40,971 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 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 [2021-07-13 20:42:40,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:40,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:40,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:41,091 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:41,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149063641] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:41,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:41,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-13 20:42:41,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441167190] [2021-07-13 20:42:41,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:42:41,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:41,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:42:41,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:42:41,092 INFO L87 Difference]: Start difference. First operand 10580 states and 40292 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:41,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:41,917 INFO L93 Difference]: Finished difference Result 18775 states and 68086 transitions. [2021-07-13 20:42:41,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-13 20:42:41,917 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:42:41,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:41,970 INFO L225 Difference]: With dead ends: 18775 [2021-07-13 20:42:41,970 INFO L226 Difference]: Without dead ends: 18775 [2021-07-13 20:42:41,970 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 435.7ms TimeCoverageRelationStatistics Valid=580, Invalid=1870, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:42:41,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18775 states. [2021-07-13 20:42:42,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18775 to 10592. [2021-07-13 20:42:42,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10592 states, 10591 states have (on average 3.807950146350675) internal successors, (40330), 10591 states have internal predecessors, (40330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:42,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10592 states to 10592 states and 40330 transitions. [2021-07-13 20:42:42,324 INFO L78 Accepts]: Start accepts. Automaton has 10592 states and 40330 transitions. Word has length 28 [2021-07-13 20:42:42,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:42,324 INFO L482 AbstractCegarLoop]: Abstraction has 10592 states and 40330 transitions. [2021-07-13 20:42:42,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:42,325 INFO L276 IsEmpty]: Start isEmpty. Operand 10592 states and 40330 transitions. [2021-07-13 20:42:42,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:42,346 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:42,346 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:42,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4009,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:42,554 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:42,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:42,554 INFO L82 PathProgramCache]: Analyzing trace with hash -2099999344, now seen corresponding path program 104 times [2021-07-13 20:42:42,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:42,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380963602] [2021-07-13 20:42:42,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:42,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:42,586 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:42:42,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:42,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380963602] [2021-07-13 20:42:42,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380963602] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:42,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291867247] [2021-07-13 20:42:42,587 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 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 [2021-07-13 20:42:42,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:42:42,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:42,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:42,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:42,711 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:42,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291867247] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:42,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:42,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:42:42,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377835432] [2021-07-13 20:42:42,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:42:42,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:42,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:42:42,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:42:42,711 INFO L87 Difference]: Start difference. First operand 10592 states and 40330 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:43,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:43,863 INFO L93 Difference]: Finished difference Result 19382 states and 69829 transitions. [2021-07-13 20:42:43,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-07-13 20:42:43,863 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:42:43,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:43,915 INFO L225 Difference]: With dead ends: 19382 [2021-07-13 20:42:43,915 INFO L226 Difference]: Without dead ends: 19382 [2021-07-13 20:42:43,916 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1847 ImplicationChecksByTransitivity, 677.3ms TimeCoverageRelationStatistics Valid=1084, Invalid=4028, Unknown=0, NotChecked=0, Total=5112 [2021-07-13 20:42:43,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19382 states. [2021-07-13 20:42:44,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19382 to 10700. [2021-07-13 20:42:44,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10700 states, 10699 states have (on average 3.800729040097205) internal successors, (40664), 10699 states have internal predecessors, (40664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:44,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10700 states to 10700 states and 40664 transitions. [2021-07-13 20:42:44,239 INFO L78 Accepts]: Start accepts. Automaton has 10700 states and 40664 transitions. Word has length 28 [2021-07-13 20:42:44,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:44,239 INFO L482 AbstractCegarLoop]: Abstraction has 10700 states and 40664 transitions. [2021-07-13 20:42:44,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:44,239 INFO L276 IsEmpty]: Start isEmpty. Operand 10700 states and 40664 transitions. [2021-07-13 20:42:44,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:44,257 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:44,257 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:44,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4010 [2021-07-13 20:42:44,459 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:44,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:44,460 INFO L82 PathProgramCache]: Analyzing trace with hash -456960190, now seen corresponding path program 105 times [2021-07-13 20:42:44,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:44,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836837780] [2021-07-13 20:42:44,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:44,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:44,499 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:42:44,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:44,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836837780] [2021-07-13 20:42:44,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836837780] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:44,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717029819] [2021-07-13 20:42:44,500 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 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 [2021-07-13 20:42:44,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:42:44,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:44,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:44,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:44,620 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:44,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717029819] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:44,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:44,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:42:44,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129969816] [2021-07-13 20:42:44,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:42:44,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:44,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:42:44,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:42:44,621 INFO L87 Difference]: Start difference. First operand 10700 states and 40664 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:45,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:45,675 INFO L93 Difference]: Finished difference Result 18954 states and 68665 transitions. [2021-07-13 20:42:45,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-13 20:42:45,676 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:42:45,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:45,842 INFO L225 Difference]: With dead ends: 18954 [2021-07-13 20:42:45,842 INFO L226 Difference]: Without dead ends: 18950 [2021-07-13 20:42:45,843 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 602.6ms TimeCoverageRelationStatistics Valid=880, Invalid=2902, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 20:42:45,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18950 states. [2021-07-13 20:42:46,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18950 to 10626. [2021-07-13 20:42:46,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10626 states, 10625 states have (on average 3.804705882352941) internal successors, (40425), 10625 states have internal predecessors, (40425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:46,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10626 states to 10626 states and 40425 transitions. [2021-07-13 20:42:46,200 INFO L78 Accepts]: Start accepts. Automaton has 10626 states and 40425 transitions. Word has length 28 [2021-07-13 20:42:46,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:46,200 INFO L482 AbstractCegarLoop]: Abstraction has 10626 states and 40425 transitions. [2021-07-13 20:42:46,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:46,200 INFO L276 IsEmpty]: Start isEmpty. Operand 10626 states and 40425 transitions. [2021-07-13 20:42:46,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:46,220 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:46,220 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:46,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4011 [2021-07-13 20:42:46,425 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:46,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:46,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1748478926, now seen corresponding path program 106 times [2021-07-13 20:42:46,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:46,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639036403] [2021-07-13 20:42:46,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:46,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:46,468 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:46,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:46,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639036403] [2021-07-13 20:42:46,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639036403] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:46,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216575691] [2021-07-13 20:42:46,468 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 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 [2021-07-13 20:42:46,493 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:42:46,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:46,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:46,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:46,598 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:46,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216575691] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:46,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:46,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:42:46,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940803258] [2021-07-13 20:42:46,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:42:46,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:46,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:42:46,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:42:46,599 INFO L87 Difference]: Start difference. First operand 10626 states and 40425 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:47,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:47,842 INFO L93 Difference]: Finished difference Result 18381 states and 66150 transitions. [2021-07-13 20:42:47,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-13 20:42:47,862 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:42:47,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:47,911 INFO L225 Difference]: With dead ends: 18381 [2021-07-13 20:42:47,911 INFO L226 Difference]: Without dead ends: 18381 [2021-07-13 20:42:47,911 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 746.5ms TimeCoverageRelationStatistics Valid=1023, Invalid=3669, Unknown=0, NotChecked=0, Total=4692 [2021-07-13 20:42:47,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18381 states. [2021-07-13 20:42:48,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18381 to 10853. [2021-07-13 20:42:48,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10853 states, 10852 states have (on average 3.807869517139698) internal successors, (41323), 10852 states have internal predecessors, (41323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:48,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10853 states to 10853 states and 41323 transitions. [2021-07-13 20:42:48,243 INFO L78 Accepts]: Start accepts. Automaton has 10853 states and 41323 transitions. Word has length 28 [2021-07-13 20:42:48,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:48,243 INFO L482 AbstractCegarLoop]: Abstraction has 10853 states and 41323 transitions. [2021-07-13 20:42:48,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:48,243 INFO L276 IsEmpty]: Start isEmpty. Operand 10853 states and 41323 transitions. [2021-07-13 20:42:48,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:48,261 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:48,261 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:48,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4012 [2021-07-13 20:42:48,477 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:48,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:48,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1366168690, now seen corresponding path program 107 times [2021-07-13 20:42:48,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:48,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225667675] [2021-07-13 20:42:48,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:48,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:48,518 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:48,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:48,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225667675] [2021-07-13 20:42:48,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225667675] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:48,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128900852] [2021-07-13 20:42:48,519 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 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 [2021-07-13 20:42:48,544 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:42:48,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:48,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:48,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:48,627 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:48,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128900852] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:48,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:48,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:42:48,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311216892] [2021-07-13 20:42:48,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:42:48,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:48,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:42:48,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:42:48,628 INFO L87 Difference]: Start difference. First operand 10853 states and 41323 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:49,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:49,590 INFO L93 Difference]: Finished difference Result 18091 states and 65344 transitions. [2021-07-13 20:42:49,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-13 20:42:49,590 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:42:49,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:49,633 INFO L225 Difference]: With dead ends: 18091 [2021-07-13 20:42:49,633 INFO L226 Difference]: Without dead ends: 18079 [2021-07-13 20:42:49,633 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1428 ImplicationChecksByTransitivity, 572.5ms TimeCoverageRelationStatistics Valid=893, Invalid=3267, Unknown=0, NotChecked=0, Total=4160 [2021-07-13 20:42:49,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18079 states. [2021-07-13 20:42:49,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18079 to 10955. [2021-07-13 20:42:49,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10955 states, 10954 states have (on average 3.8018988497352564) internal successors, (41646), 10954 states have internal predecessors, (41646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:49,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10955 states to 10955 states and 41646 transitions. [2021-07-13 20:42:49,934 INFO L78 Accepts]: Start accepts. Automaton has 10955 states and 41646 transitions. Word has length 28 [2021-07-13 20:42:49,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:49,934 INFO L482 AbstractCegarLoop]: Abstraction has 10955 states and 41646 transitions. [2021-07-13 20:42:49,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:49,934 INFO L276 IsEmpty]: Start isEmpty. Operand 10955 states and 41646 transitions. [2021-07-13 20:42:49,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:49,952 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:49,952 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:50,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4013 [2021-07-13 20:42:50,157 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:50,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:50,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1561241668, now seen corresponding path program 71 times [2021-07-13 20:42:50,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:50,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446691252] [2021-07-13 20:42:50,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:50,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:50,195 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:50,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:50,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446691252] [2021-07-13 20:42:50,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446691252] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:50,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900831969] [2021-07-13 20:42:50,195 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 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 [2021-07-13 20:42:50,225 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:42:50,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:50,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:50,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:50,291 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:50,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900831969] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:50,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:50,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-13 20:42:50,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849990441] [2021-07-13 20:42:50,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:42:50,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:50,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:42:50,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:42:50,292 INFO L87 Difference]: Start difference. First operand 10955 states and 41646 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-07-13 20:42:50,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:50,807 INFO L93 Difference]: Finished difference Result 15599 states and 57718 transitions. [2021-07-13 20:42:50,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:42:50,807 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 28 [2021-07-13 20:42:50,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:50,848 INFO L225 Difference]: With dead ends: 15599 [2021-07-13 20:42:50,848 INFO L226 Difference]: Without dead ends: 15599 [2021-07-13 20:42:50,849 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 275.0ms TimeCoverageRelationStatistics Valid=303, Invalid=887, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:42:50,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15599 states. [2021-07-13 20:42:51,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15599 to 11027. [2021-07-13 20:42:51,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11027 states, 11026 states have (on average 3.7972066025757303) internal successors, (41868), 11026 states have internal predecessors, (41868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:51,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11027 states to 11027 states and 41868 transitions. [2021-07-13 20:42:51,119 INFO L78 Accepts]: Start accepts. Automaton has 11027 states and 41868 transitions. Word has length 28 [2021-07-13 20:42:51,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:51,120 INFO L482 AbstractCegarLoop]: Abstraction has 11027 states and 41868 transitions. [2021-07-13 20:42:51,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-07-13 20:42:51,120 INFO L276 IsEmpty]: Start isEmpty. Operand 11027 states and 41868 transitions. [2021-07-13 20:42:51,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:51,137 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:51,138 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:51,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4014,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:51,353 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:51,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:51,353 INFO L82 PathProgramCache]: Analyzing trace with hash 963219036, now seen corresponding path program 72 times [2021-07-13 20:42:51,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:51,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116840571] [2021-07-13 20:42:51,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:51,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:51,385 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:51,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:51,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116840571] [2021-07-13 20:42:51,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116840571] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:51,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691214323] [2021-07-13 20:42:51,386 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 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 [2021-07-13 20:42:51,416 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:42:51,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:51,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:51,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:51,471 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:51,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691214323] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:51,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:51,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:42:51,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423299137] [2021-07-13 20:42:51,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:42:51,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:51,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:42:51,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:42:51,473 INFO L87 Difference]: Start difference. First operand 11027 states and 41868 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-07-13 20:42:51,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:51,963 INFO L93 Difference]: Finished difference Result 16567 states and 60532 transitions. [2021-07-13 20:42:51,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:42:51,963 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 28 [2021-07-13 20:42:51,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:52,011 INFO L225 Difference]: With dead ends: 16567 [2021-07-13 20:42:52,011 INFO L226 Difference]: Without dead ends: 16567 [2021-07-13 20:42:52,011 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 268.1ms TimeCoverageRelationStatistics Valid=390, Invalid=1332, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:42:52,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16567 states. [2021-07-13 20:42:52,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16567 to 11355. [2021-07-13 20:42:52,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11355 states, 11354 states have (on average 3.779284833538841) internal successors, (42910), 11354 states have internal predecessors, (42910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:52,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11355 states to 11355 states and 42910 transitions. [2021-07-13 20:42:52,333 INFO L78 Accepts]: Start accepts. Automaton has 11355 states and 42910 transitions. Word has length 28 [2021-07-13 20:42:52,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:52,333 INFO L482 AbstractCegarLoop]: Abstraction has 11355 states and 42910 transitions. [2021-07-13 20:42:52,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-07-13 20:42:52,333 INFO L276 IsEmpty]: Start isEmpty. Operand 11355 states and 42910 transitions. [2021-07-13 20:42:52,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:52,353 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:52,353 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:52,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4015,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:52,569 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:52,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:52,569 INFO L82 PathProgramCache]: Analyzing trace with hash -119803620, now seen corresponding path program 73 times [2021-07-13 20:42:52,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:52,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113716384] [2021-07-13 20:42:52,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:52,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:52,614 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:52,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:52,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113716384] [2021-07-13 20:42:52,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113716384] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:52,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769222209] [2021-07-13 20:42:52,615 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 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 [2021-07-13 20:42:52,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:52,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:52,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:52,720 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:52,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769222209] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:52,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:52,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-07-13 20:42:52,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471479382] [2021-07-13 20:42:52,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:42:52,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:52,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:42:52,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:42:52,721 INFO L87 Difference]: Start difference. First operand 11355 states and 42910 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:53,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:53,212 INFO L93 Difference]: Finished difference Result 16375 states and 60421 transitions. [2021-07-13 20:42:53,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:42:53,213 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:42:53,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:53,255 INFO L225 Difference]: With dead ends: 16375 [2021-07-13 20:42:53,255 INFO L226 Difference]: Without dead ends: 16331 [2021-07-13 20:42:53,255 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 285.6ms TimeCoverageRelationStatistics Valid=383, Invalid=1099, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:42:53,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16331 states. [2021-07-13 20:42:53,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16331 to 13242. [2021-07-13 20:42:53,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13242 states, 13241 states have (on average 3.819726606751756) internal successors, (50577), 13241 states have internal predecessors, (50577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:53,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13242 states to 13242 states and 50577 transitions. [2021-07-13 20:42:53,559 INFO L78 Accepts]: Start accepts. Automaton has 13242 states and 50577 transitions. Word has length 28 [2021-07-13 20:42:53,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:53,559 INFO L482 AbstractCegarLoop]: Abstraction has 13242 states and 50577 transitions. [2021-07-13 20:42:53,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:53,559 INFO L276 IsEmpty]: Start isEmpty. Operand 13242 states and 50577 transitions. [2021-07-13 20:42:53,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:53,583 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:53,583 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:53,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4016,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:53,798 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:53,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:53,799 INFO L82 PathProgramCache]: Analyzing trace with hash 918397894, now seen corresponding path program 74 times [2021-07-13 20:42:53,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:53,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130696956] [2021-07-13 20:42:53,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:53,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:53,836 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:42:53,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:53,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130696956] [2021-07-13 20:42:53,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130696956] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:53,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425406681] [2021-07-13 20:42:53,837 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 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 [2021-07-13 20:42:53,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:42:53,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:53,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:53,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:53,915 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:42:53,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425406681] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:53,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:53,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:42:53,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495671778] [2021-07-13 20:42:53,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:42:53,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:53,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:42:53,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:42:53,916 INFO L87 Difference]: Start difference. First operand 13242 states and 50577 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-07-13 20:42:54,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:54,406 INFO L93 Difference]: Finished difference Result 18146 states and 67670 transitions. [2021-07-13 20:42:54,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:42:54,407 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 28 [2021-07-13 20:42:54,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:54,456 INFO L225 Difference]: With dead ends: 18146 [2021-07-13 20:42:54,456 INFO L226 Difference]: Without dead ends: 18138 [2021-07-13 20:42:54,456 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 258.5ms TimeCoverageRelationStatistics Valid=295, Invalid=895, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:42:54,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18138 states. [2021-07-13 20:42:54,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18138 to 13160. [2021-07-13 20:42:54,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13160 states, 13159 states have (on average 3.8226308990044835) internal successors, (50302), 13159 states have internal predecessors, (50302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:54,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13160 states to 13160 states and 50302 transitions. [2021-07-13 20:42:54,846 INFO L78 Accepts]: Start accepts. Automaton has 13160 states and 50302 transitions. Word has length 28 [2021-07-13 20:42:54,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:54,846 INFO L482 AbstractCegarLoop]: Abstraction has 13160 states and 50302 transitions. [2021-07-13 20:42:54,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-07-13 20:42:54,846 INFO L276 IsEmpty]: Start isEmpty. Operand 13160 states and 50302 transitions. [2021-07-13 20:42:54,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:54,870 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:54,870 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:55,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4017,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:55,085 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:55,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:55,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1515734552, now seen corresponding path program 75 times [2021-07-13 20:42:55,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:55,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715888325] [2021-07-13 20:42:55,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:55,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:55,123 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:55,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:55,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715888325] [2021-07-13 20:42:55,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715888325] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:55,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179026315] [2021-07-13 20:42:55,123 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 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 [2021-07-13 20:42:55,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:42:55,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:55,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:55,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:55,207 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:55,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179026315] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:55,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:55,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-13 20:42:55,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903192408] [2021-07-13 20:42:55,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:42:55,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:55,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:42:55,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:42:55,208 INFO L87 Difference]: Start difference. First operand 13160 states and 50302 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-07-13 20:42:55,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:55,644 INFO L93 Difference]: Finished difference Result 18024 states and 67311 transitions. [2021-07-13 20:42:55,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:42:55,645 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 28 [2021-07-13 20:42:55,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:55,697 INFO L225 Difference]: With dead ends: 18024 [2021-07-13 20:42:55,698 INFO L226 Difference]: Without dead ends: 18012 [2021-07-13 20:42:55,698 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 221.9ms TimeCoverageRelationStatistics Valid=329, Invalid=1003, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:42:55,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18012 states. [2021-07-13 20:42:55,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18012 to 13126. [2021-07-13 20:42:55,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13126 states, 13125 states have (on average 3.8246857142857142) internal successors, (50199), 13125 states have internal predecessors, (50199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:56,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13126 states to 13126 states and 50199 transitions. [2021-07-13 20:42:56,037 INFO L78 Accepts]: Start accepts. Automaton has 13126 states and 50199 transitions. Word has length 28 [2021-07-13 20:42:56,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:56,037 INFO L482 AbstractCegarLoop]: Abstraction has 13126 states and 50199 transitions. [2021-07-13 20:42:56,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-07-13 20:42:56,037 INFO L276 IsEmpty]: Start isEmpty. Operand 13126 states and 50199 transitions. [2021-07-13 20:42:56,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:56,062 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:56,062 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:56,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4018 [2021-07-13 20:42:56,278 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:56,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:56,278 INFO L82 PathProgramCache]: Analyzing trace with hash 860325080, now seen corresponding path program 76 times [2021-07-13 20:42:56,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:56,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361377694] [2021-07-13 20:42:56,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:56,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:56,317 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:42:56,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:56,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361377694] [2021-07-13 20:42:56,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361377694] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:56,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230894492] [2021-07-13 20:42:56,317 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 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 [2021-07-13 20:42:56,347 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:42:56,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:56,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:56,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:56,428 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:56,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230894492] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:56,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:56,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-13 20:42:56,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406315025] [2021-07-13 20:42:56,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:42:56,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:56,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:42:56,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:42:56,429 INFO L87 Difference]: Start difference. First operand 13126 states and 50199 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:57,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:57,312 INFO L93 Difference]: Finished difference Result 24612 states and 88773 transitions. [2021-07-13 20:42:57,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 20:42:57,313 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:42:57,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:57,389 INFO L225 Difference]: With dead ends: 24612 [2021-07-13 20:42:57,389 INFO L226 Difference]: Without dead ends: 24612 [2021-07-13 20:42:57,390 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 475.1ms TimeCoverageRelationStatistics Valid=798, Invalid=2394, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:42:57,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24612 states. [2021-07-13 20:42:57,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24612 to 13108. [2021-07-13 20:42:57,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13108 states, 13107 states have (on average 3.8236057068741895) internal successors, (50116), 13107 states have internal predecessors, (50116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:57,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13108 states to 13108 states and 50116 transitions. [2021-07-13 20:42:57,827 INFO L78 Accepts]: Start accepts. Automaton has 13108 states and 50116 transitions. Word has length 28 [2021-07-13 20:42:57,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:57,828 INFO L482 AbstractCegarLoop]: Abstraction has 13108 states and 50116 transitions. [2021-07-13 20:42:57,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:57,828 INFO L276 IsEmpty]: Start isEmpty. Operand 13108 states and 50116 transitions. [2021-07-13 20:42:57,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:57,853 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:57,853 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:58,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4019,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:58,069 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:58,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:58,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1387096988, now seen corresponding path program 108 times [2021-07-13 20:42:58,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:58,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219674593] [2021-07-13 20:42:58,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:58,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:58,095 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:42:58,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:58,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219674593] [2021-07-13 20:42:58,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219674593] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:58,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118724937] [2021-07-13 20:42:58,095 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 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 [2021-07-13 20:42:58,119 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:42:58,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:58,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:42:58,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:58,209 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:58,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118724937] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:58,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:58,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-13 20:42:58,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936559345] [2021-07-13 20:42:58,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:42:58,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:58,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:42:58,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:42:58,210 INFO L87 Difference]: Start difference. First operand 13108 states and 50116 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:58,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:58,989 INFO L93 Difference]: Finished difference Result 20270 states and 73737 transitions. [2021-07-13 20:42:58,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:42:58,989 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:42:58,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:59,049 INFO L225 Difference]: With dead ends: 20270 [2021-07-13 20:42:59,049 INFO L226 Difference]: Without dead ends: 20257 [2021-07-13 20:42:59,050 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 406.1ms TimeCoverageRelationStatistics Valid=478, Invalid=1414, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:42:59,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20257 states. [2021-07-13 20:42:59,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20257 to 14410. [2021-07-13 20:42:59,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14410 states, 14409 states have (on average 3.8785481296411963) internal successors, (55886), 14409 states have internal predecessors, (55886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:59,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14410 states to 14410 states and 55886 transitions. [2021-07-13 20:42:59,469 INFO L78 Accepts]: Start accepts. Automaton has 14410 states and 55886 transitions. Word has length 28 [2021-07-13 20:42:59,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:59,469 INFO L482 AbstractCegarLoop]: Abstraction has 14410 states and 55886 transitions. [2021-07-13 20:42:59,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:59,469 INFO L276 IsEmpty]: Start isEmpty. Operand 14410 states and 55886 transitions. [2021-07-13 20:42:59,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:59,497 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:59,497 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:59,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4020 [2021-07-13 20:42:59,702 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:59,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:59,702 INFO L82 PathProgramCache]: Analyzing trace with hash 2059509770, now seen corresponding path program 109 times [2021-07-13 20:42:59,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:59,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566131836] [2021-07-13 20:42:59,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:59,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:59,728 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:42:59,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:59,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566131836] [2021-07-13 20:42:59,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566131836] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:59,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763844099] [2021-07-13 20:42:59,729 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 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 [2021-07-13 20:42:59,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:59,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:42:59,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:59,837 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:59,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763844099] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:59,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:59,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-13 20:42:59,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983346293] [2021-07-13 20:42:59,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:42:59,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:59,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:42:59,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:42:59,838 INFO L87 Difference]: Start difference. First operand 14410 states and 55886 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:00,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:00,632 INFO L93 Difference]: Finished difference Result 20362 states and 73979 transitions. [2021-07-13 20:43:00,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 20:43:00,632 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:43:00,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:00,686 INFO L225 Difference]: With dead ends: 20362 [2021-07-13 20:43:00,686 INFO L226 Difference]: Without dead ends: 20356 [2021-07-13 20:43:00,686 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 460.5ms TimeCoverageRelationStatistics Valid=541, Invalid=1715, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:43:00,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20356 states. [2021-07-13 20:43:01,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20356 to 14386. [2021-07-13 20:43:01,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14386 states, 14385 states have (on average 3.877650330205075) internal successors, (55780), 14385 states have internal predecessors, (55780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:01,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14386 states to 14386 states and 55780 transitions. [2021-07-13 20:43:01,114 INFO L78 Accepts]: Start accepts. Automaton has 14386 states and 55780 transitions. Word has length 28 [2021-07-13 20:43:01,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:01,114 INFO L482 AbstractCegarLoop]: Abstraction has 14386 states and 55780 transitions. [2021-07-13 20:43:01,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:01,114 INFO L276 IsEmpty]: Start isEmpty. Operand 14386 states and 55780 transitions. [2021-07-13 20:43:01,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:01,139 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:01,139 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:01,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4021 [2021-07-13 20:43:01,355 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:01,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:01,355 INFO L82 PathProgramCache]: Analyzing trace with hash 244170948, now seen corresponding path program 110 times [2021-07-13 20:43:01,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:01,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116369163] [2021-07-13 20:43:01,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:01,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:01,390 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:01,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:01,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116369163] [2021-07-13 20:43:01,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116369163] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:01,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492154194] [2021-07-13 20:43:01,391 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 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 [2021-07-13 20:43:01,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:43:01,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:01,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:43:01,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:01,495 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:01,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492154194] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:01,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:01,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-13 20:43:01,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819827397] [2021-07-13 20:43:01,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:43:01,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:01,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:43:01,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:43:01,496 INFO L87 Difference]: Start difference. First operand 14386 states and 55780 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-07-13 20:43:02,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:02,241 INFO L93 Difference]: Finished difference Result 23158 states and 84169 transitions. [2021-07-13 20:43:02,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:43:02,241 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 28 [2021-07-13 20:43:02,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:02,306 INFO L225 Difference]: With dead ends: 23158 [2021-07-13 20:43:02,306 INFO L226 Difference]: Without dead ends: 23145 [2021-07-13 20:43:02,306 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 360.5ms TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:43:02,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23145 states. [2021-07-13 20:43:02,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23145 to 14458. [2021-07-13 20:43:02,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14458 states, 14457 states have (on average 3.882548246524175) internal successors, (56130), 14457 states have internal predecessors, (56130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:02,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14458 states to 14458 states and 56130 transitions. [2021-07-13 20:43:02,729 INFO L78 Accepts]: Start accepts. Automaton has 14458 states and 56130 transitions. Word has length 28 [2021-07-13 20:43:02,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:02,729 INFO L482 AbstractCegarLoop]: Abstraction has 14458 states and 56130 transitions. [2021-07-13 20:43:02,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-07-13 20:43:02,729 INFO L276 IsEmpty]: Start isEmpty. Operand 14458 states and 56130 transitions. [2021-07-13 20:43:02,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:02,755 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:02,755 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:02,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4022 [2021-07-13 20:43:02,956 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:02,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:02,957 INFO L82 PathProgramCache]: Analyzing trace with hash -438573382, now seen corresponding path program 111 times [2021-07-13 20:43:02,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:02,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448919865] [2021-07-13 20:43:02,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:02,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:02,981 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:02,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:02,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448919865] [2021-07-13 20:43:02,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448919865] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:02,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990145555] [2021-07-13 20:43:02,982 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 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 [2021-07-13 20:43:03,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:43:03,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:03,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:43:03,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:03,158 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:03,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990145555] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:03,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:03,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-13 20:43:03,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120145691] [2021-07-13 20:43:03,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:43:03,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:03,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:43:03,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:43:03,159 INFO L87 Difference]: Start difference. First operand 14458 states and 56130 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-07-13 20:43:03,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:03,882 INFO L93 Difference]: Finished difference Result 24792 states and 89366 transitions. [2021-07-13 20:43:03,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 20:43:03,883 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 28 [2021-07-13 20:43:03,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:03,959 INFO L225 Difference]: With dead ends: 24792 [2021-07-13 20:43:03,959 INFO L226 Difference]: Without dead ends: 24792 [2021-07-13 20:43:03,960 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 465.0ms TimeCoverageRelationStatistics Valid=524, Invalid=1638, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:43:03,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24792 states. [2021-07-13 20:43:04,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24792 to 14502. [2021-07-13 20:43:04,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14502 states, 14501 states have (on average 3.8793876284394178) internal successors, (56255), 14501 states have internal predecessors, (56255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:04,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14502 states to 14502 states and 56255 transitions. [2021-07-13 20:43:04,404 INFO L78 Accepts]: Start accepts. Automaton has 14502 states and 56255 transitions. Word has length 28 [2021-07-13 20:43:04,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:04,404 INFO L482 AbstractCegarLoop]: Abstraction has 14502 states and 56255 transitions. [2021-07-13 20:43:04,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-07-13 20:43:04,404 INFO L276 IsEmpty]: Start isEmpty. Operand 14502 states and 56255 transitions. [2021-07-13 20:43:04,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:04,430 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:04,430 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:04,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4023 [2021-07-13 20:43:04,633 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:04,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:04,633 INFO L82 PathProgramCache]: Analyzing trace with hash -362417666, now seen corresponding path program 77 times [2021-07-13 20:43:04,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:04,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752360237] [2021-07-13 20:43:04,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:04,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:04,669 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:04,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:04,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752360237] [2021-07-13 20:43:04,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752360237] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:04,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147364397] [2021-07-13 20:43:04,670 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 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 [2021-07-13 20:43:04,700 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:43:04,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:04,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:43:04,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:04,771 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:04,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147364397] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:04,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:04,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-07-13 20:43:04,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486582568] [2021-07-13 20:43:04,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:43:04,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:04,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:43:04,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:43:04,772 INFO L87 Difference]: Start difference. First operand 14502 states and 56255 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 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) [2021-07-13 20:43:05,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:05,797 INFO L93 Difference]: Finished difference Result 24486 states and 90901 transitions. [2021-07-13 20:43:05,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-13 20:43:05,797 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 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 28 [2021-07-13 20:43:05,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:05,868 INFO L225 Difference]: With dead ends: 24486 [2021-07-13 20:43:05,868 INFO L226 Difference]: Without dead ends: 24482 [2021-07-13 20:43:05,869 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 562.6ms TimeCoverageRelationStatistics Valid=837, Invalid=2823, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:43:05,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24482 states. [2021-07-13 20:43:06,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24482 to 14756. [2021-07-13 20:43:06,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14756 states, 14755 states have (on average 3.869739071501186) internal successors, (57098), 14755 states have internal predecessors, (57098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:06,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14756 states to 14756 states and 57098 transitions. [2021-07-13 20:43:06,353 INFO L78 Accepts]: Start accepts. Automaton has 14756 states and 57098 transitions. Word has length 28 [2021-07-13 20:43:06,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:06,353 INFO L482 AbstractCegarLoop]: Abstraction has 14756 states and 57098 transitions. [2021-07-13 20:43:06,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 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) [2021-07-13 20:43:06,353 INFO L276 IsEmpty]: Start isEmpty. Operand 14756 states and 57098 transitions. [2021-07-13 20:43:06,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:06,380 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:06,380 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:06,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4024 [2021-07-13 20:43:06,593 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:06,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:06,593 INFO L82 PathProgramCache]: Analyzing trace with hash 502966272, now seen corresponding path program 112 times [2021-07-13 20:43:06,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:06,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499564973] [2021-07-13 20:43:06,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:06,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:06,622 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:06,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:06,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499564973] [2021-07-13 20:43:06,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499564973] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:06,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903848806] [2021-07-13 20:43:06,622 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 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 [2021-07-13 20:43:06,647 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:43:06,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:06,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:43:06,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:06,710 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:06,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903848806] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:06,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:06,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:43:06,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015691641] [2021-07-13 20:43:06,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:43:06,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:06,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:43:06,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:43:06,712 INFO L87 Difference]: Start difference. First operand 14756 states and 57098 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-07-13 20:43:07,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:07,357 INFO L93 Difference]: Finished difference Result 21631 states and 80082 transitions. [2021-07-13 20:43:07,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:43:07,358 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 28 [2021-07-13 20:43:07,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:07,417 INFO L225 Difference]: With dead ends: 21631 [2021-07-13 20:43:07,417 INFO L226 Difference]: Without dead ends: 21608 [2021-07-13 20:43:07,418 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 305.5ms TimeCoverageRelationStatistics Valid=449, Invalid=1273, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:43:07,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21608 states. [2021-07-13 20:43:07,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21608 to 15111. [2021-07-13 20:43:07,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15111 states, 15110 states have (on average 3.888682991396426) internal successors, (58758), 15110 states have internal predecessors, (58758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:07,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15111 states to 15111 states and 58758 transitions. [2021-07-13 20:43:07,823 INFO L78 Accepts]: Start accepts. Automaton has 15111 states and 58758 transitions. Word has length 28 [2021-07-13 20:43:07,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:07,823 INFO L482 AbstractCegarLoop]: Abstraction has 15111 states and 58758 transitions. [2021-07-13 20:43:07,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-07-13 20:43:07,823 INFO L276 IsEmpty]: Start isEmpty. Operand 15111 states and 58758 transitions. [2021-07-13 20:43:07,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:07,850 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:07,850 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:08,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4025,190 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:08,057 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:08,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:08,057 INFO L82 PathProgramCache]: Analyzing trace with hash -179778058, now seen corresponding path program 113 times [2021-07-13 20:43:08,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:08,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109223268] [2021-07-13 20:43:08,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:08,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:08,092 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:08,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:08,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109223268] [2021-07-13 20:43:08,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109223268] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:08,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635950855] [2021-07-13 20:43:08,092 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 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 [2021-07-13 20:43:08,116 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:43:08,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:08,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:43:08,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:08,193 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:08,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635950855] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:08,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:08,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:43:08,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238596769] [2021-07-13 20:43:08,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:43:08,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:08,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:43:08,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:43:08,194 INFO L87 Difference]: Start difference. First operand 15111 states and 58758 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-07-13 20:43:09,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:09,031 INFO L93 Difference]: Finished difference Result 21728 states and 79303 transitions. [2021-07-13 20:43:09,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:43:09,032 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 28 [2021-07-13 20:43:09,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:09,091 INFO L225 Difference]: With dead ends: 21728 [2021-07-13 20:43:09,091 INFO L226 Difference]: Without dead ends: 21728 [2021-07-13 20:43:09,091 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 449.2ms TimeCoverageRelationStatistics Valid=608, Invalid=1744, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:43:09,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21728 states. [2021-07-13 20:43:09,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21728 to 15230. [2021-07-13 20:43:09,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15230 states, 15229 states have (on average 3.880753824939261) internal successors, (59100), 15229 states have internal predecessors, (59100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:09,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15230 states to 15230 states and 59100 transitions. [2021-07-13 20:43:09,489 INFO L78 Accepts]: Start accepts. Automaton has 15230 states and 59100 transitions. Word has length 28 [2021-07-13 20:43:09,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:09,489 INFO L482 AbstractCegarLoop]: Abstraction has 15230 states and 59100 transitions. [2021-07-13 20:43:09,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-07-13 20:43:09,489 INFO L276 IsEmpty]: Start isEmpty. Operand 15230 states and 59100 transitions. [2021-07-13 20:43:09,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:09,516 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:09,516 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:09,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4026,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:09,721 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:09,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:09,721 INFO L82 PathProgramCache]: Analyzing trace with hash -499896522, now seen corresponding path program 114 times [2021-07-13 20:43:09,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:09,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807599366] [2021-07-13 20:43:09,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:09,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:09,763 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:09,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:09,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807599366] [2021-07-13 20:43:09,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807599366] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:09,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527647937] [2021-07-13 20:43:09,764 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 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 [2021-07-13 20:43:09,791 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:43:09,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:09,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:43:09,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:09,860 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:09,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527647937] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:09,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:09,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:43:09,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913124188] [2021-07-13 20:43:09,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:43:09,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:09,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:43:09,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:43:09,861 INFO L87 Difference]: Start difference. First operand 15230 states and 59100 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-07-13 20:43:10,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:10,614 INFO L93 Difference]: Finished difference Result 24246 states and 88914 transitions. [2021-07-13 20:43:10,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:43:10,615 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 28 [2021-07-13 20:43:10,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:10,689 INFO L225 Difference]: With dead ends: 24246 [2021-07-13 20:43:10,689 INFO L226 Difference]: Without dead ends: 24246 [2021-07-13 20:43:10,689 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 390.2ms TimeCoverageRelationStatistics Valid=505, Invalid=1301, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:43:10,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24246 states. [2021-07-13 20:43:11,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24246 to 16389. [2021-07-13 20:43:11,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16389 states, 16388 states have (on average 3.862521357090554) internal successors, (63299), 16388 states have internal predecessors, (63299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:11,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16389 states to 16389 states and 63299 transitions. [2021-07-13 20:43:11,343 INFO L78 Accepts]: Start accepts. Automaton has 16389 states and 63299 transitions. Word has length 28 [2021-07-13 20:43:11,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:11,343 INFO L482 AbstractCegarLoop]: Abstraction has 16389 states and 63299 transitions. [2021-07-13 20:43:11,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-07-13 20:43:11,344 INFO L276 IsEmpty]: Start isEmpty. Operand 16389 states and 63299 transitions. [2021-07-13 20:43:11,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:11,371 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:11,371 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:11,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4027,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:11,585 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:11,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:11,585 INFO L82 PathProgramCache]: Analyzing trace with hash 389506442, now seen corresponding path program 115 times [2021-07-13 20:43:11,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:11,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889298522] [2021-07-13 20:43:11,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:11,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:11,614 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:11,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:11,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889298522] [2021-07-13 20:43:11,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889298522] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:11,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939679595] [2021-07-13 20:43:11,615 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 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 [2021-07-13 20:43:11,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:11,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:43:11,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:11,714 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:11,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939679595] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:11,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:11,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 20:43:11,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122859485] [2021-07-13 20:43:11,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:43:11,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:11,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:43:11,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:43:11,715 INFO L87 Difference]: Start difference. First operand 16389 states and 63299 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 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) [2021-07-13 20:43:12,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:12,527 INFO L93 Difference]: Finished difference Result 27385 states and 99086 transitions. [2021-07-13 20:43:12,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:43:12,527 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 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 28 [2021-07-13 20:43:12,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:12,608 INFO L225 Difference]: With dead ends: 27385 [2021-07-13 20:43:12,608 INFO L226 Difference]: Without dead ends: 27385 [2021-07-13 20:43:12,609 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 430.7ms TimeCoverageRelationStatistics Valid=698, Invalid=1752, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:43:12,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27385 states. [2021-07-13 20:43:13,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27385 to 16619. [2021-07-13 20:43:13,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16619 states, 16618 states have (on average 3.8775424238777227) internal successors, (64437), 16618 states have internal predecessors, (64437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:13,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16619 states to 16619 states and 64437 transitions. [2021-07-13 20:43:13,078 INFO L78 Accepts]: Start accepts. Automaton has 16619 states and 64437 transitions. Word has length 28 [2021-07-13 20:43:13,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:13,079 INFO L482 AbstractCegarLoop]: Abstraction has 16619 states and 64437 transitions. [2021-07-13 20:43:13,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 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) [2021-07-13 20:43:13,079 INFO L276 IsEmpty]: Start isEmpty. Operand 16619 states and 64437 transitions. [2021-07-13 20:43:13,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:13,110 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:13,110 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:13,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4028,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:13,316 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:13,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:13,317 INFO L82 PathProgramCache]: Analyzing trace with hash -933026596, now seen corresponding path program 78 times [2021-07-13 20:43:13,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:13,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554230312] [2021-07-13 20:43:13,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:13,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:13,355 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:13,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:13,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554230312] [2021-07-13 20:43:13,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554230312] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:13,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863443443] [2021-07-13 20:43:13,355 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 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 [2021-07-13 20:43:13,380 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:43:13,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:13,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:43:13,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:13,484 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:13,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863443443] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:13,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:13,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:43:13,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859220589] [2021-07-13 20:43:13,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:43:13,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:13,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:43:13,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:43:13,485 INFO L87 Difference]: Start difference. First operand 16619 states and 64437 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:15,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:15,151 INFO L93 Difference]: Finished difference Result 42879 states and 155463 transitions. [2021-07-13 20:43:15,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-07-13 20:43:15,151 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:43:15,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:15,291 INFO L225 Difference]: With dead ends: 42879 [2021-07-13 20:43:15,291 INFO L226 Difference]: Without dead ends: 42879 [2021-07-13 20:43:15,292 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2606 ImplicationChecksByTransitivity, 939.5ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-07-13 20:43:15,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42879 states. [2021-07-13 20:43:15,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42879 to 17863. [2021-07-13 20:43:16,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17863 states, 17862 states have (on average 3.9155189788377562) internal successors, (69939), 17862 states have internal predecessors, (69939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:16,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17863 states to 17863 states and 69939 transitions. [2021-07-13 20:43:16,057 INFO L78 Accepts]: Start accepts. Automaton has 17863 states and 69939 transitions. Word has length 28 [2021-07-13 20:43:16,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:16,057 INFO L482 AbstractCegarLoop]: Abstraction has 17863 states and 69939 transitions. [2021-07-13 20:43:16,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:16,057 INFO L276 IsEmpty]: Start isEmpty. Operand 17863 states and 69939 transitions. [2021-07-13 20:43:16,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:16,089 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:16,089 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:16,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4029,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:16,304 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:16,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:16,305 INFO L82 PathProgramCache]: Analyzing trace with hash -366074516, now seen corresponding path program 79 times [2021-07-13 20:43:16,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:16,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571551463] [2021-07-13 20:43:16,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:16,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:16,337 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:16,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:16,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571551463] [2021-07-13 20:43:16,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571551463] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:16,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916568129] [2021-07-13 20:43:16,337 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 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 [2021-07-13 20:43:16,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:16,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:43:16,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:16,459 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:16,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916568129] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:16,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:16,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:43:16,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211288667] [2021-07-13 20:43:16,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:43:16,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:16,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:43:16,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:43:16,460 INFO L87 Difference]: Start difference. First operand 17863 states and 69939 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:18,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:18,137 INFO L93 Difference]: Finished difference Result 41907 states and 152905 transitions. [2021-07-13 20:43:18,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-07-13 20:43:18,137 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:43:18,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:18,282 INFO L225 Difference]: With dead ends: 41907 [2021-07-13 20:43:18,282 INFO L226 Difference]: Without dead ends: 41907 [2021-07-13 20:43:18,283 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2605 ImplicationChecksByTransitivity, 923.3ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-07-13 20:43:18,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41907 states. [2021-07-13 20:43:19,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41907 to 17837. [2021-07-13 20:43:19,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17837 states, 17836 states have (on average 3.912480376766091) internal successors, (69783), 17836 states have internal predecessors, (69783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:19,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17837 states to 17837 states and 69783 transitions. [2021-07-13 20:43:19,106 INFO L78 Accepts]: Start accepts. Automaton has 17837 states and 69783 transitions. Word has length 28 [2021-07-13 20:43:19,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:19,106 INFO L482 AbstractCegarLoop]: Abstraction has 17837 states and 69783 transitions. [2021-07-13 20:43:19,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:19,106 INFO L276 IsEmpty]: Start isEmpty. Operand 17837 states and 69783 transitions. [2021-07-13 20:43:19,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:19,138 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:19,138 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:19,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4030 [2021-07-13 20:43:19,349 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:19,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:19,350 INFO L82 PathProgramCache]: Analyzing trace with hash -648300864, now seen corresponding path program 116 times [2021-07-13 20:43:19,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:19,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109039931] [2021-07-13 20:43:19,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:19,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:19,381 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:19,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:19,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109039931] [2021-07-13 20:43:19,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109039931] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:19,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974246248] [2021-07-13 20:43:19,382 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 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 [2021-07-13 20:43:19,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:43:19,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:19,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:43:19,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:19,463 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:19,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974246248] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:19,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:19,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:43:19,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950069188] [2021-07-13 20:43:19,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:43:19,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:19,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:43:19,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:43:19,464 INFO L87 Difference]: Start difference. First operand 17837 states and 69783 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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) [2021-07-13 20:43:19,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:19,889 INFO L93 Difference]: Finished difference Result 28682 states and 110964 transitions. [2021-07-13 20:43:19,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:43:19,889 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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 28 [2021-07-13 20:43:19,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:19,976 INFO L225 Difference]: With dead ends: 28682 [2021-07-13 20:43:19,976 INFO L226 Difference]: Without dead ends: 28632 [2021-07-13 20:43:19,976 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 111.0ms TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:43:20,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28632 states. [2021-07-13 20:43:20,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28632 to 23563. [2021-07-13 20:43:20,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23563 states, 23562 states have (on average 3.9230965113318055) internal successors, (92436), 23562 states have internal predecessors, (92436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:20,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23563 states to 23563 states and 92436 transitions. [2021-07-13 20:43:20,509 INFO L78 Accepts]: Start accepts. Automaton has 23563 states and 92436 transitions. Word has length 28 [2021-07-13 20:43:20,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:20,509 INFO L482 AbstractCegarLoop]: Abstraction has 23563 states and 92436 transitions. [2021-07-13 20:43:20,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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) [2021-07-13 20:43:20,509 INFO L276 IsEmpty]: Start isEmpty. Operand 23563 states and 92436 transitions. [2021-07-13 20:43:20,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:20,550 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:20,550 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:20,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4031 [2021-07-13 20:43:20,757 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:20,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:20,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1261765878, now seen corresponding path program 117 times [2021-07-13 20:43:20,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:20,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073780362] [2021-07-13 20:43:20,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:20,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:20,784 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:20,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:20,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073780362] [2021-07-13 20:43:20,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073780362] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:20,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766423666] [2021-07-13 20:43:20,784 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 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 [2021-07-13 20:43:20,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:43:20,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:20,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:43:20,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:20,871 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:20,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766423666] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:20,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:20,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:43:20,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467273494] [2021-07-13 20:43:20,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:43:20,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:20,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:43:20,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:43:20,872 INFO L87 Difference]: Start difference. First operand 23563 states and 92436 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-07-13 20:43:21,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:21,185 INFO L93 Difference]: Finished difference Result 26308 states and 100773 transitions. [2021-07-13 20:43:21,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:43:21,186 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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 28 [2021-07-13 20:43:21,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:21,274 INFO L225 Difference]: With dead ends: 26308 [2021-07-13 20:43:21,274 INFO L226 Difference]: Without dead ends: 26308 [2021-07-13 20:43:21,274 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 96.0ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:43:21,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26308 states. [2021-07-13 20:43:21,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26308 to 23066. [2021-07-13 20:43:21,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23066 states, 23065 states have (on average 3.9134619553435943) internal successors, (90264), 23065 states have internal predecessors, (90264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:22,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23066 states to 23066 states and 90264 transitions. [2021-07-13 20:43:22,038 INFO L78 Accepts]: Start accepts. Automaton has 23066 states and 90264 transitions. Word has length 28 [2021-07-13 20:43:22,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:22,038 INFO L482 AbstractCegarLoop]: Abstraction has 23066 states and 90264 transitions. [2021-07-13 20:43:22,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-07-13 20:43:22,038 INFO L276 IsEmpty]: Start isEmpty. Operand 23066 states and 90264 transitions. [2021-07-13 20:43:22,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:22,079 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:22,079 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:22,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4032 [2021-07-13 20:43:22,294 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:22,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:22,294 INFO L82 PathProgramCache]: Analyzing trace with hash 310084440, now seen corresponding path program 118 times [2021-07-13 20:43:22,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:22,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880390039] [2021-07-13 20:43:22,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:22,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:22,514 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:22,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:22,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880390039] [2021-07-13 20:43:22,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880390039] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:22,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384338499] [2021-07-13 20:43:22,515 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 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 [2021-07-13 20:43:22,563 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:43:22,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:22,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:43:22,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:22,667 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:43:22,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384338499] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:22,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:22,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-07-13 20:43:22,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683559370] [2021-07-13 20:43:22,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:43:22,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:22,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:43:22,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:43:22,668 INFO L87 Difference]: Start difference. First operand 23066 states and 90264 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:23,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:23,634 INFO L93 Difference]: Finished difference Result 35513 states and 132496 transitions. [2021-07-13 20:43:23,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 20:43:23,636 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:43:23,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:23,826 INFO L225 Difference]: With dead ends: 35513 [2021-07-13 20:43:23,826 INFO L226 Difference]: Without dead ends: 35513 [2021-07-13 20:43:23,827 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 482.5ms TimeCoverageRelationStatistics Valid=720, Invalid=2472, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:43:23,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35513 states. [2021-07-13 20:43:24,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35513 to 23134. [2021-07-13 20:43:24,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23134 states, 23133 states have (on average 3.9115981498292482) internal successors, (90487), 23133 states have internal predecessors, (90487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:24,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23134 states to 23134 states and 90487 transitions. [2021-07-13 20:43:24,589 INFO L78 Accepts]: Start accepts. Automaton has 23134 states and 90487 transitions. Word has length 28 [2021-07-13 20:43:24,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:24,589 INFO L482 AbstractCegarLoop]: Abstraction has 23134 states and 90487 transitions. [2021-07-13 20:43:24,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:24,590 INFO L276 IsEmpty]: Start isEmpty. Operand 23134 states and 90487 transitions. [2021-07-13 20:43:24,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:24,636 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:24,636 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:24,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4033 [2021-07-13 20:43:24,841 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:24,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:24,841 INFO L82 PathProgramCache]: Analyzing trace with hash -666234404, now seen corresponding path program 119 times [2021-07-13 20:43:24,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:24,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986947647] [2021-07-13 20:43:24,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:24,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:24,881 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:24,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:24,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986947647] [2021-07-13 20:43:24,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986947647] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:24,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997633798] [2021-07-13 20:43:24,882 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 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 [2021-07-13 20:43:24,908 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:43:24,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:24,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:43:24,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:25,150 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:43:25,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997633798] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:25,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:25,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-13 20:43:25,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645001464] [2021-07-13 20:43:25,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:43:25,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:25,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:43:25,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:43:25,151 INFO L87 Difference]: Start difference. First operand 23134 states and 90487 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:26,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:26,387 INFO L93 Difference]: Finished difference Result 45671 states and 168413 transitions. [2021-07-13 20:43:26,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-07-13 20:43:26,387 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:43:26,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:26,644 INFO L225 Difference]: With dead ends: 45671 [2021-07-13 20:43:26,644 INFO L226 Difference]: Without dead ends: 45671 [2021-07-13 20:43:26,645 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3102 ImplicationChecksByTransitivity, 655.3ms TimeCoverageRelationStatistics Valid=1548, Invalid=6284, Unknown=0, NotChecked=0, Total=7832 [2021-07-13 20:43:26,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45671 states. [2021-07-13 20:43:27,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45671 to 23135. [2021-07-13 20:43:27,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23135 states, 23134 states have (on average 3.913460707184231) internal successors, (90534), 23134 states have internal predecessors, (90534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:27,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23135 states to 23135 states and 90534 transitions. [2021-07-13 20:43:27,635 INFO L78 Accepts]: Start accepts. Automaton has 23135 states and 90534 transitions. Word has length 28 [2021-07-13 20:43:27,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:27,636 INFO L482 AbstractCegarLoop]: Abstraction has 23135 states and 90534 transitions. [2021-07-13 20:43:27,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:27,636 INFO L276 IsEmpty]: Start isEmpty. Operand 23135 states and 90534 transitions. [2021-07-13 20:43:27,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:27,889 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:27,889 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:28,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4034,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:28,105 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:28,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:28,105 INFO L82 PathProgramCache]: Analyzing trace with hash -99282324, now seen corresponding path program 120 times [2021-07-13 20:43:28,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:28,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220362615] [2021-07-13 20:43:28,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:28,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:28,132 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:28,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:28,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220362615] [2021-07-13 20:43:28,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220362615] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:28,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925938090] [2021-07-13 20:43:28,132 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 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 [2021-07-13 20:43:28,156 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:43:28,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:28,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:43:28,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:28,241 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:43:28,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925938090] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:28,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:28,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-13 20:43:28,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767509388] [2021-07-13 20:43:28,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:43:28,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:28,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:43:28,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:43:28,242 INFO L87 Difference]: Start difference. First operand 23135 states and 90534 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:28,575 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-07-13 20:43:29,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:29,620 INFO L93 Difference]: Finished difference Result 45296 states and 167759 transitions. [2021-07-13 20:43:29,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-07-13 20:43:29,621 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:43:29,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:29,896 INFO L225 Difference]: With dead ends: 45296 [2021-07-13 20:43:29,896 INFO L226 Difference]: Without dead ends: 45296 [2021-07-13 20:43:29,907 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2992 ImplicationChecksByTransitivity, 831.6ms TimeCoverageRelationStatistics Valid=1515, Invalid=6141, Unknown=0, NotChecked=0, Total=7656 [2021-07-13 20:43:29,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45296 states. [2021-07-13 20:43:30,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45296 to 22919. [2021-07-13 20:43:30,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22919 states, 22918 states have (on average 3.9066236146260582) internal successors, (89532), 22918 states have internal predecessors, (89532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:30,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22919 states to 22919 states and 89532 transitions. [2021-07-13 20:43:30,804 INFO L78 Accepts]: Start accepts. Automaton has 22919 states and 89532 transitions. Word has length 28 [2021-07-13 20:43:30,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:30,805 INFO L482 AbstractCegarLoop]: Abstraction has 22919 states and 89532 transitions. [2021-07-13 20:43:30,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:30,805 INFO L276 IsEmpty]: Start isEmpty. Operand 22919 states and 89532 transitions. [2021-07-13 20:43:30,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:30,844 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:30,844 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:31,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4035 [2021-07-13 20:43:31,051 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:31,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:31,052 INFO L82 PathProgramCache]: Analyzing trace with hash 836856348, now seen corresponding path program 121 times [2021-07-13 20:43:31,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:31,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916978555] [2021-07-13 20:43:31,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:31,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:31,078 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:43:31,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:31,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916978555] [2021-07-13 20:43:31,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916978555] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:31,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763918875] [2021-07-13 20:43:31,078 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 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 [2021-07-13 20:43:31,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:31,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:43:31,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:31,156 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:43:31,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763918875] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:31,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:31,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-07-13 20:43:31,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814836119] [2021-07-13 20:43:31,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:43:31,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:31,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:43:31,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:43:31,157 INFO L87 Difference]: Start difference. First operand 22919 states and 89532 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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) [2021-07-13 20:43:31,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:31,616 INFO L93 Difference]: Finished difference Result 35247 states and 132459 transitions. [2021-07-13 20:43:31,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:43:31,616 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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 28 [2021-07-13 20:43:31,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:31,887 INFO L225 Difference]: With dead ends: 35247 [2021-07-13 20:43:31,887 INFO L226 Difference]: Without dead ends: 35230 [2021-07-13 20:43:31,887 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 102.8ms TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:43:31,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35230 states. [2021-07-13 20:43:32,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35230 to 23187. [2021-07-13 20:43:32,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23187 states, 23186 states have (on average 3.9111532821530233) internal successors, (90684), 23186 states have internal predecessors, (90684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:32,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23187 states to 23187 states and 90684 transitions. [2021-07-13 20:43:32,893 INFO L78 Accepts]: Start accepts. Automaton has 23187 states and 90684 transitions. Word has length 28 [2021-07-13 20:43:32,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:32,893 INFO L482 AbstractCegarLoop]: Abstraction has 23187 states and 90684 transitions. [2021-07-13 20:43:32,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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) [2021-07-13 20:43:32,894 INFO L276 IsEmpty]: Start isEmpty. Operand 23187 states and 90684 transitions. [2021-07-13 20:43:32,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:32,937 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:32,937 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:33,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4036,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:33,150 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:33,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:33,150 INFO L82 PathProgramCache]: Analyzing trace with hash -306069692, now seen corresponding path program 122 times [2021-07-13 20:43:33,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:33,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296859358] [2021-07-13 20:43:33,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:33,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:33,176 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:43:33,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:33,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296859358] [2021-07-13 20:43:33,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296859358] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:33,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514036436] [2021-07-13 20:43:33,177 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 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 [2021-07-13 20:43:33,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:43:33,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:33,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:43:33,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:33,258 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:43:33,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514036436] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:33,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:33,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-07-13 20:43:33,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713304127] [2021-07-13 20:43:33,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:43:33,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:33,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:43:33,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:43:33,259 INFO L87 Difference]: Start difference. First operand 23187 states and 90684 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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) [2021-07-13 20:43:33,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:33,791 INFO L93 Difference]: Finished difference Result 37405 states and 139306 transitions. [2021-07-13 20:43:33,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:43:33,792 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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 28 [2021-07-13 20:43:33,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:33,916 INFO L225 Difference]: With dead ends: 37405 [2021-07-13 20:43:33,916 INFO L226 Difference]: Without dead ends: 37405 [2021-07-13 20:43:33,916 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 119.3ms TimeCoverageRelationStatistics Valid=135, Invalid=245, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:43:33,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37405 states. [2021-07-13 20:43:34,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37405 to 22856. [2021-07-13 20:43:34,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22856 states, 22855 states have (on average 3.898402975278932) internal successors, (89098), 22855 states have internal predecessors, (89098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:34,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22856 states to 22856 states and 89098 transitions. [2021-07-13 20:43:34,862 INFO L78 Accepts]: Start accepts. Automaton has 22856 states and 89098 transitions. Word has length 28 [2021-07-13 20:43:34,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:34,862 INFO L482 AbstractCegarLoop]: Abstraction has 22856 states and 89098 transitions. [2021-07-13 20:43:34,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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) [2021-07-13 20:43:34,863 INFO L276 IsEmpty]: Start isEmpty. Operand 22856 states and 89098 transitions. [2021-07-13 20:43:34,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:34,921 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:34,921 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:35,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4037,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:35,128 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:35,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:35,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1652751258, now seen corresponding path program 123 times [2021-07-13 20:43:35,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:35,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644321934] [2021-07-13 20:43:35,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:35,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:35,173 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:35,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:35,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644321934] [2021-07-13 20:43:35,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644321934] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:35,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58118812] [2021-07-13 20:43:35,173 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 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 [2021-07-13 20:43:35,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:43:35,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:35,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:43:35,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:35,274 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:43:35,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58118812] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:35,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:35,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-13 20:43:35,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432936448] [2021-07-13 20:43:35,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:43:35,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:35,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:43:35,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:43:35,275 INFO L87 Difference]: Start difference. First operand 22856 states and 89098 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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) [2021-07-13 20:43:36,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:36,243 INFO L93 Difference]: Finished difference Result 32629 states and 122440 transitions. [2021-07-13 20:43:36,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-13 20:43:36,243 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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 28 [2021-07-13 20:43:36,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:36,348 INFO L225 Difference]: With dead ends: 32629 [2021-07-13 20:43:36,348 INFO L226 Difference]: Without dead ends: 32629 [2021-07-13 20:43:36,348 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 428.5ms TimeCoverageRelationStatistics Valid=589, Invalid=1961, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:43:36,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32629 states. [2021-07-13 20:43:37,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32629 to 22904. [2021-07-13 20:43:37,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22904 states, 22903 states have (on average 3.8973060297777584) internal successors, (89260), 22903 states have internal predecessors, (89260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:37,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22904 states to 22904 states and 89260 transitions. [2021-07-13 20:43:37,262 INFO L78 Accepts]: Start accepts. Automaton has 22904 states and 89260 transitions. Word has length 28 [2021-07-13 20:43:37,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:37,262 INFO L482 AbstractCegarLoop]: Abstraction has 22904 states and 89260 transitions. [2021-07-13 20:43:37,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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) [2021-07-13 20:43:37,262 INFO L276 IsEmpty]: Start isEmpty. Operand 22904 states and 89260 transitions. [2021-07-13 20:43:37,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:37,307 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:37,307 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:37,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4038,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:37,521 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:37,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:37,521 INFO L82 PathProgramCache]: Analyzing trace with hash -867837164, now seen corresponding path program 124 times [2021-07-13 20:43:37,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:37,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944609643] [2021-07-13 20:43:37,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:37,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:37,559 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:37,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:37,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944609643] [2021-07-13 20:43:37,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944609643] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:37,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260531519] [2021-07-13 20:43:37,559 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 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 [2021-07-13 20:43:37,589 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:43:37,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:37,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:43:37,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:37,666 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:43:37,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260531519] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:37,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:37,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-13 20:43:37,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159354217] [2021-07-13 20:43:37,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:43:37,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:37,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:43:37,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:43:37,667 INFO L87 Difference]: Start difference. First operand 22904 states and 89260 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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) [2021-07-13 20:43:38,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:38,987 INFO L93 Difference]: Finished difference Result 34174 states and 126879 transitions. [2021-07-13 20:43:38,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-13 20:43:38,988 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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 28 [2021-07-13 20:43:38,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:39,107 INFO L225 Difference]: With dead ends: 34174 [2021-07-13 20:43:39,107 INFO L226 Difference]: Without dead ends: 34174 [2021-07-13 20:43:39,107 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1623 ImplicationChecksByTransitivity, 765.9ms TimeCoverageRelationStatistics Valid=928, Invalid=3494, Unknown=0, NotChecked=0, Total=4422 [2021-07-13 20:43:39,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34174 states. [2021-07-13 20:43:39,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34174 to 23462. [2021-07-13 20:43:39,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23462 states, 23461 states have (on average 3.8782234346362046) internal successors, (90987), 23461 states have internal predecessors, (90987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:39,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23462 states to 23462 states and 90987 transitions. [2021-07-13 20:43:39,904 INFO L78 Accepts]: Start accepts. Automaton has 23462 states and 90987 transitions. Word has length 28 [2021-07-13 20:43:39,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:39,904 INFO L482 AbstractCegarLoop]: Abstraction has 23462 states and 90987 transitions. [2021-07-13 20:43:39,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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) [2021-07-13 20:43:39,904 INFO L276 IsEmpty]: Start isEmpty. Operand 23462 states and 90987 transitions. [2021-07-13 20:43:39,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:39,944 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:39,944 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:40,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4039,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:40,160 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:40,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:40,160 INFO L82 PathProgramCache]: Analyzing trace with hash -912658306, now seen corresponding path program 125 times [2021-07-13 20:43:40,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:40,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883359065] [2021-07-13 20:43:40,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:40,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:40,213 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:40,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:40,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883359065] [2021-07-13 20:43:40,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883359065] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:40,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797636950] [2021-07-13 20:43:40,213 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 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 [2021-07-13 20:43:40,238 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:43:40,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:40,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:43:40,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:40,310 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:43:40,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797636950] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:40,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:40,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-13 20:43:40,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824346884] [2021-07-13 20:43:40,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:43:40,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:40,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:43:40,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:43:40,311 INFO L87 Difference]: Start difference. First operand 23462 states and 90987 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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) [2021-07-13 20:43:41,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:41,384 INFO L93 Difference]: Finished difference Result 33276 states and 124519 transitions. [2021-07-13 20:43:41,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-13 20:43:41,385 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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 28 [2021-07-13 20:43:41,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:41,491 INFO L225 Difference]: With dead ends: 33276 [2021-07-13 20:43:41,491 INFO L226 Difference]: Without dead ends: 33272 [2021-07-13 20:43:41,491 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1124 ImplicationChecksByTransitivity, 493.8ms TimeCoverageRelationStatistics Valid=736, Invalid=2570, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:43:41,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33272 states. [2021-07-13 20:43:42,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33272 to 23354. [2021-07-13 20:43:42,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23354 states, 23353 states have (on average 3.880657731340727) internal successors, (90625), 23353 states have internal predecessors, (90625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:42,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23354 states to 23354 states and 90625 transitions. [2021-07-13 20:43:42,427 INFO L78 Accepts]: Start accepts. Automaton has 23354 states and 90625 transitions. Word has length 28 [2021-07-13 20:43:42,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:42,427 INFO L482 AbstractCegarLoop]: Abstraction has 23354 states and 90625 transitions. [2021-07-13 20:43:42,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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) [2021-07-13 20:43:42,428 INFO L276 IsEmpty]: Start isEmpty. Operand 23354 states and 90625 transitions. [2021-07-13 20:43:42,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:42,473 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:42,473 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:42,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4040,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:42,689 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:42,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:42,690 INFO L82 PathProgramCache]: Analyzing trace with hash -47274368, now seen corresponding path program 126 times [2021-07-13 20:43:42,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:42,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673691581] [2021-07-13 20:43:42,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:42,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:42,717 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:43:42,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:42,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673691581] [2021-07-13 20:43:42,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673691581] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:42,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845599123] [2021-07-13 20:43:42,718 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 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 [2021-07-13 20:43:42,743 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:43:42,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:42,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:43:42,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:42,794 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:43:42,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845599123] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:42,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:42,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-07-13 20:43:42,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085658121] [2021-07-13 20:43:42,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:43:42,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:42,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:43:42,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:43:42,795 INFO L87 Difference]: Start difference. First operand 23354 states and 90625 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:43,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:43,197 INFO L93 Difference]: Finished difference Result 29681 states and 111114 transitions. [2021-07-13 20:43:43,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:43:43,197 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:43:43,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:43,291 INFO L225 Difference]: With dead ends: 29681 [2021-07-13 20:43:43,291 INFO L226 Difference]: Without dead ends: 29681 [2021-07-13 20:43:43,291 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 100.9ms TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:43:43,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29681 states. [2021-07-13 20:43:43,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29681 to 23664. [2021-07-13 20:43:43,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23664 states, 23663 states have (on average 3.872628153657609) internal successors, (91638), 23663 states have internal predecessors, (91638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:43,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23664 states to 23664 states and 91638 transitions. [2021-07-13 20:43:43,999 INFO L78 Accepts]: Start accepts. Automaton has 23664 states and 91638 transitions. Word has length 28 [2021-07-13 20:43:43,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:43,999 INFO L482 AbstractCegarLoop]: Abstraction has 23664 states and 91638 transitions. [2021-07-13 20:43:43,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:43,999 INFO L276 IsEmpty]: Start isEmpty. Operand 23664 states and 91638 transitions. [2021-07-13 20:43:44,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:44,040 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:44,040 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:44,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4041 [2021-07-13 20:43:44,255 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:44,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:44,256 INFO L82 PathProgramCache]: Analyzing trace with hash 882925376, now seen corresponding path program 127 times [2021-07-13 20:43:44,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:44,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272219663] [2021-07-13 20:43:44,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:44,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:44,291 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:44,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:44,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272219663] [2021-07-13 20:43:44,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272219663] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:44,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918402573] [2021-07-13 20:43:44,292 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 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 [2021-07-13 20:43:44,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:44,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:43:44,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:44,386 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:43:44,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918402573] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:44,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:44,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-07-13 20:43:44,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52036618] [2021-07-13 20:43:44,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:43:44,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:44,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:43:44,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:43:44,387 INFO L87 Difference]: Start difference. First operand 23664 states and 91638 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:45,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:45,415 INFO L93 Difference]: Finished difference Result 34438 states and 127402 transitions. [2021-07-13 20:43:45,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 20:43:45,416 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:43:45,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:45,529 INFO L225 Difference]: With dead ends: 34438 [2021-07-13 20:43:45,529 INFO L226 Difference]: Without dead ends: 34438 [2021-07-13 20:43:45,529 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 475.5ms TimeCoverageRelationStatistics Valid=684, Invalid=2396, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 20:43:45,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34438 states. [2021-07-13 20:43:46,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34438 to 25439. [2021-07-13 20:43:46,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25439 states, 25438 states have (on average 3.8818696438399245) internal successors, (98747), 25438 states have internal predecessors, (98747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:46,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25439 states to 25439 states and 98747 transitions. [2021-07-13 20:43:46,441 INFO L78 Accepts]: Start accepts. Automaton has 25439 states and 98747 transitions. Word has length 28 [2021-07-13 20:43:46,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:46,442 INFO L482 AbstractCegarLoop]: Abstraction has 25439 states and 98747 transitions. [2021-07-13 20:43:46,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:46,442 INFO L276 IsEmpty]: Start isEmpty. Operand 25439 states and 98747 transitions. [2021-07-13 20:43:46,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:46,487 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:46,488 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:46,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4042 [2021-07-13 20:43:46,703 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:46,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:46,703 INFO L82 PathProgramCache]: Analyzing trace with hash -956846952, now seen corresponding path program 128 times [2021-07-13 20:43:46,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:46,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927266990] [2021-07-13 20:43:46,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:46,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:46,737 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:46,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:46,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927266990] [2021-07-13 20:43:46,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927266990] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:46,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232864170] [2021-07-13 20:43:46,738 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 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 [2021-07-13 20:43:46,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:43:46,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:46,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:43:46,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:46,815 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:43:46,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232864170] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:46,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:46,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-07-13 20:43:46,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715626438] [2021-07-13 20:43:46,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:43:46,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:46,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:43:46,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:43:46,816 INFO L87 Difference]: Start difference. First operand 25439 states and 98747 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:47,295 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-07-13 20:43:47,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:47,623 INFO L93 Difference]: Finished difference Result 32691 states and 122893 transitions. [2021-07-13 20:43:47,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:43:47,623 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:43:47,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:47,731 INFO L225 Difference]: With dead ends: 32691 [2021-07-13 20:43:47,731 INFO L226 Difference]: Without dead ends: 32679 [2021-07-13 20:43:47,732 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 450.4ms TimeCoverageRelationStatistics Valid=503, Invalid=1849, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:43:47,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32679 states. [2021-07-13 20:43:48,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32679 to 25599. [2021-07-13 20:43:48,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25599 states, 25598 states have (on average 3.8770607078678023) internal successors, (99245), 25598 states have internal predecessors, (99245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:48,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25599 states to 25599 states and 99245 transitions. [2021-07-13 20:43:48,633 INFO L78 Accepts]: Start accepts. Automaton has 25599 states and 99245 transitions. Word has length 28 [2021-07-13 20:43:48,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:48,633 INFO L482 AbstractCegarLoop]: Abstraction has 25599 states and 99245 transitions. [2021-07-13 20:43:48,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:48,633 INFO L276 IsEmpty]: Start isEmpty. Operand 25599 states and 99245 transitions. [2021-07-13 20:43:48,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:48,676 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:48,676 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:48,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4043 [2021-07-13 20:43:48,892 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:48,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:48,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1587630268, now seen corresponding path program 129 times [2021-07-13 20:43:48,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:48,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424017870] [2021-07-13 20:43:48,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:48,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:48,919 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:43:48,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:48,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424017870] [2021-07-13 20:43:48,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424017870] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:48,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668952176] [2021-07-13 20:43:48,919 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 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 [2021-07-13 20:43:48,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:43:48,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:48,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:43:48,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:48,986 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:43:48,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668952176] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:48,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:48,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-13 20:43:48,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735856794] [2021-07-13 20:43:48,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:43:48,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:48,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:43:48,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:43:48,987 INFO L87 Difference]: Start difference. First operand 25599 states and 99245 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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) [2021-07-13 20:43:49,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:49,282 INFO L93 Difference]: Finished difference Result 30159 states and 114821 transitions. [2021-07-13 20:43:49,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:43:49,282 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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 28 [2021-07-13 20:43:49,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:49,533 INFO L225 Difference]: With dead ends: 30159 [2021-07-13 20:43:49,534 INFO L226 Difference]: Without dead ends: 30159 [2021-07-13 20:43:49,534 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 91.7ms TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:43:49,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30159 states. [2021-07-13 20:43:50,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30159 to 26806. [2021-07-13 20:43:50,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26806 states, 26805 states have (on average 3.8731952993844434) internal successors, (103821), 26805 states have internal predecessors, (103821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:50,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26806 states to 26806 states and 103821 transitions. [2021-07-13 20:43:50,243 INFO L78 Accepts]: Start accepts. Automaton has 26806 states and 103821 transitions. Word has length 28 [2021-07-13 20:43:50,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:50,243 INFO L482 AbstractCegarLoop]: Abstraction has 26806 states and 103821 transitions. [2021-07-13 20:43:50,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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) [2021-07-13 20:43:50,243 INFO L276 IsEmpty]: Start isEmpty. Operand 26806 states and 103821 transitions. [2021-07-13 20:43:50,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:50,296 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:50,296 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:50,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4044 [2021-07-13 20:43:50,509 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:50,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:50,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1143968700, now seen corresponding path program 130 times [2021-07-13 20:43:50,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:50,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967887839] [2021-07-13 20:43:50,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:50,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:50,546 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:50,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:50,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967887839] [2021-07-13 20:43:50,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967887839] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:50,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642415217] [2021-07-13 20:43:50,546 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 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 [2021-07-13 20:43:50,570 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:43:50,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:50,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:43:50,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:50,625 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:50,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642415217] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:50,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:50,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-13 20:43:50,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850773116] [2021-07-13 20:43:50,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:43:50,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:50,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:43:50,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:43:50,626 INFO L87 Difference]: Start difference. First operand 26806 states and 103821 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-07-13 20:43:51,213 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2021-07-13 20:43:51,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:51,573 INFO L93 Difference]: Finished difference Result 34754 states and 129602 transitions. [2021-07-13 20:43:51,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 20:43:51,573 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 28 [2021-07-13 20:43:51,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:51,686 INFO L225 Difference]: With dead ends: 34754 [2021-07-13 20:43:51,686 INFO L226 Difference]: Without dead ends: 34754 [2021-07-13 20:43:51,686 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 543.3ms TimeCoverageRelationStatistics Valid=627, Invalid=2235, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:43:51,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34754 states. [2021-07-13 20:43:52,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34754 to 28000. [2021-07-13 20:43:52,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28000 states, 27999 states have (on average 3.8443515839851425) internal successors, (107638), 27999 states have internal predecessors, (107638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:52,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28000 states to 28000 states and 107638 transitions. [2021-07-13 20:43:52,716 INFO L78 Accepts]: Start accepts. Automaton has 28000 states and 107638 transitions. Word has length 28 [2021-07-13 20:43:52,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:52,716 INFO L482 AbstractCegarLoop]: Abstraction has 28000 states and 107638 transitions. [2021-07-13 20:43:52,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-07-13 20:43:52,717 INFO L276 IsEmpty]: Start isEmpty. Operand 28000 states and 107638 transitions. [2021-07-13 20:43:52,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:52,776 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:52,776 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:52,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4045 [2021-07-13 20:43:52,982 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:52,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:52,982 INFO L82 PathProgramCache]: Analyzing trace with hash -403875748, now seen corresponding path program 131 times [2021-07-13 20:43:52,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:52,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642414818] [2021-07-13 20:43:52,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:52,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:53,015 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:53,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:53,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642414818] [2021-07-13 20:43:53,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642414818] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:53,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969973937] [2021-07-13 20:43:53,015 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 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 [2021-07-13 20:43:53,041 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:43:53,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:53,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:43:53,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:53,106 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:53,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969973937] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:53,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:53,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:43:53,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231110749] [2021-07-13 20:43:53,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:43:53,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:53,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:43:53,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:43:53,107 INFO L87 Difference]: Start difference. First operand 28000 states and 107638 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-07-13 20:43:53,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:53,861 INFO L93 Difference]: Finished difference Result 33849 states and 127203 transitions. [2021-07-13 20:43:53,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:43:53,862 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 28 [2021-07-13 20:43:53,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:53,974 INFO L225 Difference]: With dead ends: 33849 [2021-07-13 20:43:53,975 INFO L226 Difference]: Without dead ends: 33841 [2021-07-13 20:43:53,975 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 285.7ms TimeCoverageRelationStatistics Valid=394, Invalid=1412, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:43:54,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33841 states. [2021-07-13 20:43:54,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33841 to 27806. [2021-07-13 20:43:54,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27806 states, 27805 states have (on average 3.8502787268476895) internal successors, (107057), 27805 states have internal predecessors, (107057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:54,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27806 states to 27806 states and 107057 transitions. [2021-07-13 20:43:54,904 INFO L78 Accepts]: Start accepts. Automaton has 27806 states and 107057 transitions. Word has length 28 [2021-07-13 20:43:54,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:54,904 INFO L482 AbstractCegarLoop]: Abstraction has 27806 states and 107057 transitions. [2021-07-13 20:43:54,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-07-13 20:43:54,904 INFO L276 IsEmpty]: Start isEmpty. Operand 27806 states and 107057 transitions. [2021-07-13 20:43:55,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:55,107 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:55,107 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:55,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4046 [2021-07-13 20:43:55,317 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:55,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:55,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1046121180, now seen corresponding path program 132 times [2021-07-13 20:43:55,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:55,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417662927] [2021-07-13 20:43:55,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:55,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:55,347 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:55,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:55,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417662927] [2021-07-13 20:43:55,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417662927] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:55,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285780213] [2021-07-13 20:43:55,348 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 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 [2021-07-13 20:43:55,372 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:43:55,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:55,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:43:55,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:55,433 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:55,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285780213] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:55,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:55,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:43:55,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575267599] [2021-07-13 20:43:55,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:43:55,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:55,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:43:55,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:43:55,434 INFO L87 Difference]: Start difference. First operand 27806 states and 107057 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-07-13 20:43:56,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:56,377 INFO L93 Difference]: Finished difference Result 35673 states and 132779 transitions. [2021-07-13 20:43:56,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 20:43:56,378 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 28 [2021-07-13 20:43:56,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:56,490 INFO L225 Difference]: With dead ends: 35673 [2021-07-13 20:43:56,490 INFO L226 Difference]: Without dead ends: 35673 [2021-07-13 20:43:56,491 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 390.1ms TimeCoverageRelationStatistics Valid=566, Invalid=2086, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 20:43:56,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35673 states. [2021-07-13 20:43:57,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35673 to 28844. [2021-07-13 20:43:57,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28844 states, 28843 states have (on average 3.827618486287834) internal successors, (110400), 28843 states have internal predecessors, (110400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:57,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28844 states to 28844 states and 110400 transitions. [2021-07-13 20:43:57,339 INFO L78 Accepts]: Start accepts. Automaton has 28844 states and 110400 transitions. Word has length 28 [2021-07-13 20:43:57,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:57,339 INFO L482 AbstractCegarLoop]: Abstraction has 28844 states and 110400 transitions. [2021-07-13 20:43:57,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-07-13 20:43:57,340 INFO L276 IsEmpty]: Start isEmpty. Operand 28844 states and 110400 transitions. [2021-07-13 20:43:57,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:57,399 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:57,399 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:57,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4047,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:57,613 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:57,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:57,613 INFO L82 PathProgramCache]: Analyzing trace with hash -36901476, now seen corresponding path program 133 times [2021-07-13 20:43:57,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:57,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726597815] [2021-07-13 20:43:57,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:57,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:57,636 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:57,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:57,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726597815] [2021-07-13 20:43:57,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726597815] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:57,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725374300] [2021-07-13 20:43:57,637 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 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 [2021-07-13 20:43:57,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:57,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:43:57,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:57,710 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:57,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725374300] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:57,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:57,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-07-13 20:43:57,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527103511] [2021-07-13 20:43:57,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:43:57,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:57,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:43:57,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:43:57,711 INFO L87 Difference]: Start difference. First operand 28844 states and 110400 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-07-13 20:43:58,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:58,382 INFO L93 Difference]: Finished difference Result 35179 states and 133683 transitions. [2021-07-13 20:43:58,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:43:58,383 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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 28 [2021-07-13 20:43:58,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:58,499 INFO L225 Difference]: With dead ends: 35179 [2021-07-13 20:43:58,499 INFO L226 Difference]: Without dead ends: 35166 [2021-07-13 20:43:58,499 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 155.8ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:43:58,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35166 states. [2021-07-13 20:43:59,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35166 to 33639. [2021-07-13 20:43:59,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33639 states, 33638 states have (on average 3.8427968369106367) internal successors, (129264), 33638 states have internal predecessors, (129264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:59,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33639 states to 33639 states and 129264 transitions. [2021-07-13 20:43:59,604 INFO L78 Accepts]: Start accepts. Automaton has 33639 states and 129264 transitions. Word has length 28 [2021-07-13 20:43:59,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:59,604 INFO L482 AbstractCegarLoop]: Abstraction has 33639 states and 129264 transitions. [2021-07-13 20:43:59,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-07-13 20:43:59,604 INFO L276 IsEmpty]: Start isEmpty. Operand 33639 states and 129264 transitions. [2021-07-13 20:43:59,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:59,669 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:59,669 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:59,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4048,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:59,877 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:59,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:59,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1434176642, now seen corresponding path program 134 times [2021-07-13 20:43:59,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:59,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758453218] [2021-07-13 20:43:59,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:59,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:59,908 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:59,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:59,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758453218] [2021-07-13 20:43:59,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758453218] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:59,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414974466] [2021-07-13 20:43:59,909 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 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 [2021-07-13 20:43:59,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:43:59,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:59,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:43:59,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:59,988 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:59,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414974466] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:59,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:59,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-07-13 20:43:59,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114175214] [2021-07-13 20:43:59,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:43:59,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:59,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:43:59,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:43:59,989 INFO L87 Difference]: Start difference. First operand 33639 states and 129264 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-07-13 20:44:00,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:00,573 INFO L93 Difference]: Finished difference Result 36796 states and 139166 transitions. [2021-07-13 20:44:00,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:44:00,574 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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 28 [2021-07-13 20:44:00,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:00,690 INFO L225 Difference]: With dead ends: 36796 [2021-07-13 20:44:00,690 INFO L226 Difference]: Without dead ends: 36796 [2021-07-13 20:44:00,690 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 127.3ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:44:00,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36796 states. [2021-07-13 20:44:01,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36796 to 33316. [2021-07-13 20:44:01,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33316 states, 33315 states have (on average 3.839021461803992) internal successors, (127897), 33315 states have internal predecessors, (127897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:01,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33316 states to 33316 states and 127897 transitions. [2021-07-13 20:44:01,795 INFO L78 Accepts]: Start accepts. Automaton has 33316 states and 127897 transitions. Word has length 28 [2021-07-13 20:44:01,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:01,795 INFO L482 AbstractCegarLoop]: Abstraction has 33316 states and 127897 transitions. [2021-07-13 20:44:01,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-07-13 20:44:01,795 INFO L276 IsEmpty]: Start isEmpty. Operand 33316 states and 127897 transitions. [2021-07-13 20:44:01,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:44:01,861 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:01,861 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:02,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4049,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:02,064 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:02,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:02,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1001300038, now seen corresponding path program 135 times [2021-07-13 20:44:02,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:02,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332343100] [2021-07-13 20:44:02,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:02,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:02,104 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:02,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:02,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332343100] [2021-07-13 20:44:02,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332343100] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:02,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817329892] [2021-07-13 20:44:02,104 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 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 [2021-07-13 20:44:02,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:44:02,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:02,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:44:02,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:02,177 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:02,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817329892] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:02,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:02,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:44:02,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289278582] [2021-07-13 20:44:02,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:44:02,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:02,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:44:02,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:44:02,178 INFO L87 Difference]: Start difference. First operand 33316 states and 127897 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-07-13 20:44:02,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:02,985 INFO L93 Difference]: Finished difference Result 39856 states and 149676 transitions. [2021-07-13 20:44:02,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:44:02,993 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 28 [2021-07-13 20:44:02,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:03,124 INFO L225 Difference]: With dead ends: 39856 [2021-07-13 20:44:03,124 INFO L226 Difference]: Without dead ends: 39848 [2021-07-13 20:44:03,125 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 249.4ms TimeCoverageRelationStatistics Valid=354, Invalid=1286, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:44:03,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39848 states. [2021-07-13 20:44:03,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39848 to 33282. [2021-07-13 20:44:04,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33282 states, 33281 states have (on average 3.839427901805835) internal successors, (127780), 33281 states have internal predecessors, (127780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:04,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33282 states to 33282 states and 127780 transitions. [2021-07-13 20:44:04,126 INFO L78 Accepts]: Start accepts. Automaton has 33282 states and 127780 transitions. Word has length 28 [2021-07-13 20:44:04,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:04,126 INFO L482 AbstractCegarLoop]: Abstraction has 33282 states and 127780 transitions. [2021-07-13 20:44:04,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-07-13 20:44:04,126 INFO L276 IsEmpty]: Start isEmpty. Operand 33282 states and 127780 transitions. [2021-07-13 20:44:04,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:44:04,362 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:04,362 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:04,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4050,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:04,578 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:04,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:04,579 INFO L82 PathProgramCache]: Analyzing trace with hash 105479222, now seen corresponding path program 136 times [2021-07-13 20:44:04,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:04,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923142685] [2021-07-13 20:44:04,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:04,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:04,609 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:44:04,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:04,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923142685] [2021-07-13 20:44:04,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923142685] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:04,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887452724] [2021-07-13 20:44:04,610 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 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 [2021-07-13 20:44:04,633 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:44:04,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:04,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:44:04,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:04,685 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:44:04,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887452724] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:04,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:04,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-07-13 20:44:04,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981324449] [2021-07-13 20:44:04,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:44:04,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:04,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:44:04,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:44:04,686 INFO L87 Difference]: Start difference. First operand 33282 states and 127780 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-07-13 20:44:05,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:05,192 INFO L93 Difference]: Finished difference Result 36198 states and 137505 transitions. [2021-07-13 20:44:05,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:44:05,193 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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 28 [2021-07-13 20:44:05,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:05,311 INFO L225 Difference]: With dead ends: 36198 [2021-07-13 20:44:05,311 INFO L226 Difference]: Without dead ends: 36198 [2021-07-13 20:44:05,311 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 203.0ms TimeCoverageRelationStatistics Valid=221, Invalid=535, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:44:05,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36198 states. [2021-07-13 20:44:06,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36198 to 33814. [2021-07-13 20:44:06,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33814 states, 33813 states have (on average 3.837695560878952) internal successors, (129764), 33813 states have internal predecessors, (129764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:06,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33814 states to 33814 states and 129764 transitions. [2021-07-13 20:44:06,374 INFO L78 Accepts]: Start accepts. Automaton has 33814 states and 129764 transitions. Word has length 28 [2021-07-13 20:44:06,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:06,374 INFO L482 AbstractCegarLoop]: Abstraction has 33814 states and 129764 transitions. [2021-07-13 20:44:06,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-07-13 20:44:06,374 INFO L276 IsEmpty]: Start isEmpty. Operand 33814 states and 129764 transitions. [2021-07-13 20:44:06,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:44:06,439 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:06,439 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:06,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4051 [2021-07-13 20:44:06,654 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:06,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:06,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1598636696, now seen corresponding path program 137 times [2021-07-13 20:44:06,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:06,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573949031] [2021-07-13 20:44:06,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:06,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:06,684 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:44:06,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:06,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573949031] [2021-07-13 20:44:06,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573949031] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:06,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908966235] [2021-07-13 20:44:06,684 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 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 [2021-07-13 20:44:06,707 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:44:06,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:06,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:44:06,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:06,755 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:44:06,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908966235] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:06,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:06,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:44:06,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112364314] [2021-07-13 20:44:06,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:44:06,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:06,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:44:06,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:44:06,769 INFO L87 Difference]: Start difference. First operand 33814 states and 129764 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-07-13 20:44:07,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:07,598 INFO L93 Difference]: Finished difference Result 40833 states and 153241 transitions. [2021-07-13 20:44:07,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:44:07,599 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 28 [2021-07-13 20:44:07,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:07,739 INFO L225 Difference]: With dead ends: 40833 [2021-07-13 20:44:07,739 INFO L226 Difference]: Without dead ends: 40809 [2021-07-13 20:44:07,739 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 263.7ms TimeCoverageRelationStatistics Valid=348, Invalid=1292, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:44:07,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40809 states. [2021-07-13 20:44:08,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40809 to 33986. [2021-07-13 20:44:08,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33986 states, 33985 states have (on average 3.8339855818743565) internal successors, (130298), 33985 states have internal predecessors, (130298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:08,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33986 states to 33986 states and 130298 transitions. [2021-07-13 20:44:08,967 INFO L78 Accepts]: Start accepts. Automaton has 33986 states and 130298 transitions. Word has length 28 [2021-07-13 20:44:08,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:08,968 INFO L482 AbstractCegarLoop]: Abstraction has 33986 states and 130298 transitions. [2021-07-13 20:44:08,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-07-13 20:44:08,968 INFO L276 IsEmpty]: Start isEmpty. Operand 33986 states and 130298 transitions. [2021-07-13 20:44:09,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:44:09,035 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:09,035 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:09,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4052 [2021-07-13 20:44:09,249 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:09,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:09,249 INFO L82 PathProgramCache]: Analyzing trace with hash -252372998, now seen corresponding path program 138 times [2021-07-13 20:44:09,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:09,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387958781] [2021-07-13 20:44:09,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:09,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:09,285 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:09,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:09,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387958781] [2021-07-13 20:44:09,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387958781] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:09,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387930818] [2021-07-13 20:44:09,286 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 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 [2021-07-13 20:44:09,312 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:44:09,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:09,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:44:09,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:09,360 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:09,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387930818] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:09,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:09,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-07-13 20:44:09,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680672087] [2021-07-13 20:44:09,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:44:09,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:09,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:44:09,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:44:09,361 INFO L87 Difference]: Start difference. First operand 33986 states and 130298 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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) [2021-07-13 20:44:10,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:10,122 INFO L93 Difference]: Finished difference Result 36618 states and 138998 transitions. [2021-07-13 20:44:10,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:44:10,123 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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 28 [2021-07-13 20:44:10,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:10,245 INFO L225 Difference]: With dead ends: 36618 [2021-07-13 20:44:10,245 INFO L226 Difference]: Without dead ends: 36618 [2021-07-13 20:44:10,245 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 235.9ms TimeCoverageRelationStatistics Valid=273, Invalid=657, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:44:10,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36618 states. [2021-07-13 20:44:11,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36618 to 33912. [2021-07-13 20:44:11,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33912 states, 33911 states have (on average 3.8348028663265605) internal successors, (130042), 33911 states have internal predecessors, (130042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:11,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33912 states to 33912 states and 130042 transitions. [2021-07-13 20:44:11,404 INFO L78 Accepts]: Start accepts. Automaton has 33912 states and 130042 transitions. Word has length 28 [2021-07-13 20:44:11,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:11,404 INFO L482 AbstractCegarLoop]: Abstraction has 33912 states and 130042 transitions. [2021-07-13 20:44:11,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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) [2021-07-13 20:44:11,404 INFO L276 IsEmpty]: Start isEmpty. Operand 33912 states and 130042 transitions. [2021-07-13 20:44:11,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:44:11,471 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:11,471 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:11,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4053,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:11,687 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:11,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:11,687 INFO L82 PathProgramCache]: Analyzing trace with hash 606143132, now seen corresponding path program 139 times [2021-07-13 20:44:11,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:11,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180357519] [2021-07-13 20:44:11,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:11,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:11,723 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:11,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:11,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180357519] [2021-07-13 20:44:11,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180357519] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:11,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613243533] [2021-07-13 20:44:11,724 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 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 [2021-07-13 20:44:11,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:11,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:44:11,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:11,802 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:11,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613243533] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:11,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:11,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-13 20:44:11,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489837055] [2021-07-13 20:44:11,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:44:11,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:11,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:44:11,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:44:11,803 INFO L87 Difference]: Start difference. First operand 33912 states and 130042 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-07-13 20:44:12,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:12,742 INFO L93 Difference]: Finished difference Result 40756 states and 152982 transitions. [2021-07-13 20:44:12,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:44:12,743 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 28 [2021-07-13 20:44:12,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:12,879 INFO L225 Difference]: With dead ends: 40756 [2021-07-13 20:44:12,880 INFO L226 Difference]: Without dead ends: 40716 [2021-07-13 20:44:12,880 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 344.4ms TimeCoverageRelationStatistics Valid=425, Invalid=1645, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:44:12,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40716 states. [2021-07-13 20:44:13,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40716 to 34086. [2021-07-13 20:44:13,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34086 states, 34085 states have (on average 3.8309813701041513) internal successors, (130579), 34085 states have internal predecessors, (130579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:13,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34086 states to 34086 states and 130579 transitions. [2021-07-13 20:44:13,900 INFO L78 Accepts]: Start accepts. Automaton has 34086 states and 130579 transitions. Word has length 28 [2021-07-13 20:44:13,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:13,900 INFO L482 AbstractCegarLoop]: Abstraction has 34086 states and 130579 transitions. [2021-07-13 20:44:13,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-07-13 20:44:13,900 INFO L276 IsEmpty]: Start isEmpty. Operand 34086 states and 130579 transitions. [2021-07-13 20:44:14,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:44:14,165 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:14,165 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:14,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4054 [2021-07-13 20:44:14,380 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:14,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:14,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1649950116, now seen corresponding path program 140 times [2021-07-13 20:44:14,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:14,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081243525] [2021-07-13 20:44:14,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:14,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:14,410 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:14,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:14,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081243525] [2021-07-13 20:44:14,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081243525] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:14,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304374290] [2021-07-13 20:44:14,411 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 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 [2021-07-13 20:44:14,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:44:14,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:14,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:44:14,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:14,557 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:14,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304374290] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:14,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:14,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:44:14,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175326446] [2021-07-13 20:44:14,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:44:14,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:14,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:44:14,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:44:14,558 INFO L87 Difference]: Start difference. First operand 34086 states and 130579 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:16,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:16,150 INFO L93 Difference]: Finished difference Result 76027 states and 281494 transitions. [2021-07-13 20:44:16,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-13 20:44:16,150 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:44:16,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:16,453 INFO L225 Difference]: With dead ends: 76027 [2021-07-13 20:44:16,453 INFO L226 Difference]: Without dead ends: 76027 [2021-07-13 20:44:16,453 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1801 ImplicationChecksByTransitivity, 672.9ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-07-13 20:44:16,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76027 states. [2021-07-13 20:44:18,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76027 to 43183. [2021-07-13 20:44:18,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43183 states, 43182 states have (on average 3.906581445972859) internal successors, (168694), 43182 states have internal predecessors, (168694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:18,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43183 states to 43183 states and 168694 transitions. [2021-07-13 20:44:18,541 INFO L78 Accepts]: Start accepts. Automaton has 43183 states and 168694 transitions. Word has length 28 [2021-07-13 20:44:18,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:18,541 INFO L482 AbstractCegarLoop]: Abstraction has 43183 states and 168694 transitions. [2021-07-13 20:44:18,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:18,541 INFO L276 IsEmpty]: Start isEmpty. Operand 43183 states and 168694 transitions. [2021-07-13 20:44:18,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:44:18,633 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:18,633 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:18,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4055 [2021-07-13 20:44:18,838 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:18,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:18,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1082998036, now seen corresponding path program 141 times [2021-07-13 20:44:18,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:18,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768553651] [2021-07-13 20:44:18,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:18,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:18,869 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:18,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:18,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768553651] [2021-07-13 20:44:18,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768553651] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:18,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217280257] [2021-07-13 20:44:18,870 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 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 [2021-07-13 20:44:18,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:44:18,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:18,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:44:18,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:19,049 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:19,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217280257] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:19,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:19,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:44:19,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617712702] [2021-07-13 20:44:19,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:44:19,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:19,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:44:19,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:44:19,050 INFO L87 Difference]: Start difference. First operand 43183 states and 168694 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:20,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:20,943 INFO L93 Difference]: Finished difference Result 75388 states and 279801 transitions. [2021-07-13 20:44:20,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-13 20:44:20,944 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:44:20,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:21,235 INFO L225 Difference]: With dead ends: 75388 [2021-07-13 20:44:21,235 INFO L226 Difference]: Without dead ends: 75388 [2021-07-13 20:44:21,235 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1802 ImplicationChecksByTransitivity, 940.2ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-07-13 20:44:21,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75388 states. [2021-07-13 20:44:22,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75388 to 43180. [2021-07-13 20:44:23,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43180 states, 43179 states have (on average 3.906528636605757) internal successors, (168680), 43179 states have internal predecessors, (168680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:23,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43180 states to 43180 states and 168680 transitions. [2021-07-13 20:44:23,204 INFO L78 Accepts]: Start accepts. Automaton has 43180 states and 168680 transitions. Word has length 28 [2021-07-13 20:44:23,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:23,204 INFO L482 AbstractCegarLoop]: Abstraction has 43180 states and 168680 transitions. [2021-07-13 20:44:23,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:23,204 INFO L276 IsEmpty]: Start isEmpty. Operand 43180 states and 168680 transitions. [2021-07-13 20:44:23,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:44:23,294 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:23,294 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:23,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4056,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:23,509 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:23,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:23,509 INFO L82 PathProgramCache]: Analyzing trace with hash 2039623402, now seen corresponding path program 142 times [2021-07-13 20:44:23,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:23,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462102279] [2021-07-13 20:44:23,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:23,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:23,539 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:23,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:23,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462102279] [2021-07-13 20:44:23,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462102279] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:23,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040926704] [2021-07-13 20:44:23,539 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 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 [2021-07-13 20:44:23,562 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:44:23,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:23,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:44:23,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:23,652 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:23,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040926704] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:23,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:23,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-13 20:44:23,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143771137] [2021-07-13 20:44:23,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:44:23,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:23,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:44:23,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:44:23,653 INFO L87 Difference]: Start difference. First operand 43180 states and 168680 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:25,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:25,364 INFO L93 Difference]: Finished difference Result 69979 states and 261702 transitions. [2021-07-13 20:44:25,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-13 20:44:25,365 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:44:25,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:25,682 INFO L225 Difference]: With dead ends: 69979 [2021-07-13 20:44:25,682 INFO L226 Difference]: Without dead ends: 69979 [2021-07-13 20:44:25,682 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 606.0ms TimeCoverageRelationStatistics Valid=944, Invalid=3216, Unknown=0, NotChecked=0, Total=4160 [2021-07-13 20:44:25,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69979 states. [2021-07-13 20:44:27,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69979 to 43204. [2021-07-13 20:44:27,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43204 states, 43203 states have (on average 3.9067657338610746) internal successors, (168784), 43203 states have internal predecessors, (168784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:27,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43204 states to 43204 states and 168784 transitions. [2021-07-13 20:44:27,744 INFO L78 Accepts]: Start accepts. Automaton has 43204 states and 168784 transitions. Word has length 28 [2021-07-13 20:44:27,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:27,744 INFO L482 AbstractCegarLoop]: Abstraction has 43204 states and 168784 transitions. [2021-07-13 20:44:27,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:27,744 INFO L276 IsEmpty]: Start isEmpty. Operand 43204 states and 168784 transitions. [2021-07-13 20:44:27,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:44:27,834 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:27,834 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:28,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4057 [2021-07-13 20:44:28,050 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:28,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:28,050 INFO L82 PathProgramCache]: Analyzing trace with hash 2120999490, now seen corresponding path program 143 times [2021-07-13 20:44:28,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:28,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253458534] [2021-07-13 20:44:28,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:28,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:28,080 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:28,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:28,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253458534] [2021-07-13 20:44:28,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253458534] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:28,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945408030] [2021-07-13 20:44:28,080 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 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 [2021-07-13 20:44:28,105 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:44:28,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:28,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:44:28,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:28,185 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:28,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945408030] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:28,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:28,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-13 20:44:28,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517217153] [2021-07-13 20:44:28,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:44:28,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:28,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:44:28,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:44:28,186 INFO L87 Difference]: Start difference. First operand 43204 states and 168784 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:29,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:29,543 INFO L93 Difference]: Finished difference Result 69094 states and 259411 transitions. [2021-07-13 20:44:29,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-13 20:44:29,544 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:44:29,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:30,020 INFO L225 Difference]: With dead ends: 69094 [2021-07-13 20:44:30,020 INFO L226 Difference]: Without dead ends: 69086 [2021-07-13 20:44:30,020 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 505.4ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 20:44:30,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69086 states. [2021-07-13 20:44:31,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69086 to 43204. [2021-07-13 20:44:31,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43204 states, 43203 states have (on average 3.9066268546165777) internal successors, (168778), 43203 states have internal predecessors, (168778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:31,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43204 states to 43204 states and 168778 transitions. [2021-07-13 20:44:31,769 INFO L78 Accepts]: Start accepts. Automaton has 43204 states and 168778 transitions. Word has length 28 [2021-07-13 20:44:31,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:31,769 INFO L482 AbstractCegarLoop]: Abstraction has 43204 states and 168778 transitions. [2021-07-13 20:44:31,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:31,769 INFO L276 IsEmpty]: Start isEmpty. Operand 43204 states and 168778 transitions. [2021-07-13 20:44:32,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:44:32,137 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:32,137 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:32,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4058,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:32,337 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:32,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:32,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1243310590, now seen corresponding path program 144 times [2021-07-13 20:44:32,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:32,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916692719] [2021-07-13 20:44:32,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:32,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:32,372 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:32,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:32,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916692719] [2021-07-13 20:44:32,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916692719] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:32,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567472617] [2021-07-13 20:44:32,372 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 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 [2021-07-13 20:44:32,397 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:44:32,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:32,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:44:32,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:32,503 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:32,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567472617] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:32,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:32,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:44:32,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446471583] [2021-07-13 20:44:32,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:44:32,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:32,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:44:32,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:44:32,504 INFO L87 Difference]: Start difference. First operand 43204 states and 168778 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:34,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:34,197 INFO L93 Difference]: Finished difference Result 68768 states and 258526 transitions. [2021-07-13 20:44:34,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-13 20:44:34,198 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:44:34,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:34,498 INFO L225 Difference]: With dead ends: 68768 [2021-07-13 20:44:34,498 INFO L226 Difference]: Without dead ends: 68768 [2021-07-13 20:44:34,499 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1363 ImplicationChecksByTransitivity, 622.8ms TimeCoverageRelationStatistics Valid=872, Invalid=3034, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 20:44:34,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68768 states. [2021-07-13 20:44:36,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68768 to 43212. [2021-07-13 20:44:36,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43212 states, 43211 states have (on average 3.9066904260489226) internal successors, (168812), 43211 states have internal predecessors, (168812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:36,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43212 states to 43212 states and 168812 transitions. [2021-07-13 20:44:36,392 INFO L78 Accepts]: Start accepts. Automaton has 43212 states and 168812 transitions. Word has length 28 [2021-07-13 20:44:36,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:36,393 INFO L482 AbstractCegarLoop]: Abstraction has 43212 states and 168812 transitions. [2021-07-13 20:44:36,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:36,393 INFO L276 IsEmpty]: Start isEmpty. Operand 43212 states and 168812 transitions. [2021-07-13 20:44:36,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:44:36,484 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:36,484 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:36,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4059,224 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:36,692 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:36,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:36,693 INFO L82 PathProgramCache]: Analyzing trace with hash 399728564, now seen corresponding path program 145 times [2021-07-13 20:44:36,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:36,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035125062] [2021-07-13 20:44:36,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:36,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:36,733 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:36,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:36,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035125062] [2021-07-13 20:44:36,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035125062] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:36,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048782419] [2021-07-13 20:44:36,733 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 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 [2021-07-13 20:44:36,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:36,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:44:36,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:36,847 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:36,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048782419] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:36,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:36,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:44:36,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262644407] [2021-07-13 20:44:36,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:44:36,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:36,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:44:36,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:44:36,848 INFO L87 Difference]: Start difference. First operand 43212 states and 168812 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:38,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:38,190 INFO L93 Difference]: Finished difference Result 68557 states and 258000 transitions. [2021-07-13 20:44:38,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-13 20:44:38,190 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:44:38,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:38,696 INFO L225 Difference]: With dead ends: 68557 [2021-07-13 20:44:38,697 INFO L226 Difference]: Without dead ends: 68549 [2021-07-13 20:44:38,697 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1134 ImplicationChecksByTransitivity, 666.1ms TimeCoverageRelationStatistics Valid=767, Invalid=2539, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:44:38,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68549 states. [2021-07-13 20:44:40,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68549 to 43212. [2021-07-13 20:44:40,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43212 states, 43211 states have (on average 3.906644141538034) internal successors, (168810), 43211 states have internal predecessors, (168810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:40,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43212 states to 43212 states and 168810 transitions. [2021-07-13 20:44:40,429 INFO L78 Accepts]: Start accepts. Automaton has 43212 states and 168810 transitions. Word has length 28 [2021-07-13 20:44:40,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:40,429 INFO L482 AbstractCegarLoop]: Abstraction has 43212 states and 168810 transitions. [2021-07-13 20:44:40,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:40,430 INFO L276 IsEmpty]: Start isEmpty. Operand 43212 states and 168810 transitions. [2021-07-13 20:44:40,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:44:40,521 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:40,521 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:40,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4060,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:40,724 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:40,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:40,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1403156548, now seen corresponding path program 146 times [2021-07-13 20:44:40,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:40,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498985404] [2021-07-13 20:44:40,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:40,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:40,956 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-07-13 20:44:40,981 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:40,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:40,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498985404] [2021-07-13 20:44:40,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498985404] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:40,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484351749] [2021-07-13 20:44:40,982 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 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 [2021-07-13 20:44:41,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:44:41,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:41,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:44:41,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:41,118 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:41,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484351749] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:41,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:41,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-07-13 20:44:41,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164775042] [2021-07-13 20:44:41,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:44:41,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:41,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:44:41,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:44:41,119 INFO L87 Difference]: Start difference. First operand 43212 states and 168810 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:42,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:42,547 INFO L93 Difference]: Finished difference Result 67982 states and 254698 transitions. [2021-07-13 20:44:42,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-13 20:44:42,547 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:44:42,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:42,816 INFO L225 Difference]: With dead ends: 67982 [2021-07-13 20:44:42,816 INFO L226 Difference]: Without dead ends: 67982 [2021-07-13 20:44:42,817 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 583.4ms TimeCoverageRelationStatistics Valid=978, Invalid=3714, Unknown=0, NotChecked=0, Total=4692 [2021-07-13 20:44:42,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67982 states. [2021-07-13 20:44:44,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67982 to 46442. [2021-07-13 20:44:44,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46442 states, 46441 states have (on average 3.9102086518378156) internal successors, (181594), 46441 states have internal predecessors, (181594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:44,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46442 states to 46442 states and 181594 transitions. [2021-07-13 20:44:44,840 INFO L78 Accepts]: Start accepts. Automaton has 46442 states and 181594 transitions. Word has length 28 [2021-07-13 20:44:44,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:44,840 INFO L482 AbstractCegarLoop]: Abstraction has 46442 states and 181594 transitions. [2021-07-13 20:44:44,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:44,840 INFO L276 IsEmpty]: Start isEmpty. Operand 46442 states and 181594 transitions. [2021-07-13 20:44:44,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:44:44,922 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:44,922 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:45,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4061 [2021-07-13 20:44:45,137 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:45,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:45,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1484532636, now seen corresponding path program 147 times [2021-07-13 20:44:45,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:45,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942218714] [2021-07-13 20:44:45,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:45,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:45,168 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:45,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:45,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942218714] [2021-07-13 20:44:45,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942218714] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:45,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232567899] [2021-07-13 20:44:45,168 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 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 [2021-07-13 20:44:45,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:44:45,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:45,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:44:45,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:45,261 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:45,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232567899] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:45,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:45,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-07-13 20:44:45,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491791767] [2021-07-13 20:44:45,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:44:45,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:45,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:44:45,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:44:45,262 INFO L87 Difference]: Start difference. First operand 46442 states and 181594 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:46,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:46,545 INFO L93 Difference]: Finished difference Result 67509 states and 253442 transitions. [2021-07-13 20:44:46,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-13 20:44:46,545 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:44:46,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:46,997 INFO L225 Difference]: With dead ends: 67509 [2021-07-13 20:44:46,997 INFO L226 Difference]: Without dead ends: 67501 [2021-07-13 20:44:46,997 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1219 ImplicationChecksByTransitivity, 642.4ms TimeCoverageRelationStatistics Valid=736, Invalid=2804, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:44:47,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67501 states. [2021-07-13 20:44:48,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67501 to 46136. [2021-07-13 20:44:48,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46136 states, 46135 states have (on average 3.9156172103608973) internal successors, (180647), 46135 states have internal predecessors, (180647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:49,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46136 states to 46136 states and 180647 transitions. [2021-07-13 20:44:49,145 INFO L78 Accepts]: Start accepts. Automaton has 46136 states and 180647 transitions. Word has length 28 [2021-07-13 20:44:49,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:49,146 INFO L482 AbstractCegarLoop]: Abstraction has 46136 states and 180647 transitions. [2021-07-13 20:44:49,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:49,146 INFO L276 IsEmpty]: Start isEmpty. Operand 46136 states and 180647 transitions. [2021-07-13 20:44:49,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:44:49,236 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:49,236 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:49,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4062,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:49,439 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:49,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:49,439 INFO L82 PathProgramCache]: Analyzing trace with hash -30559336, now seen corresponding path program 148 times [2021-07-13 20:44:49,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:49,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684069878] [2021-07-13 20:44:49,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:49,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:49,471 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:49,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:49,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684069878] [2021-07-13 20:44:49,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684069878] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:49,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345069861] [2021-07-13 20:44:49,471 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 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 [2021-07-13 20:44:49,500 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:44:49,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:49,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:44:49,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:49,576 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:49,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345069861] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:49,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:49,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-07-13 20:44:49,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641092329] [2021-07-13 20:44:49,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:44:49,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:49,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:44:49,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:44:49,577 INFO L87 Difference]: Start difference. First operand 46136 states and 180647 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:50,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:50,823 INFO L93 Difference]: Finished difference Result 65985 states and 249225 transitions. [2021-07-13 20:44:50,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:44:50,824 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:44:50,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:51,096 INFO L225 Difference]: With dead ends: 65985 [2021-07-13 20:44:51,096 INFO L226 Difference]: Without dead ends: 65961 [2021-07-13 20:44:51,096 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 382.7ms TimeCoverageRelationStatistics Valid=498, Invalid=1758, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:44:51,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65961 states. [2021-07-13 20:44:52,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65961 to 46032. [2021-07-13 20:44:52,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46032 states, 46031 states have (on average 3.915600356281636) internal successors, (180239), 46031 states have internal predecessors, (180239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:53,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46032 states to 46032 states and 180239 transitions. [2021-07-13 20:44:53,111 INFO L78 Accepts]: Start accepts. Automaton has 46032 states and 180239 transitions. Word has length 28 [2021-07-13 20:44:53,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:53,111 INFO L482 AbstractCegarLoop]: Abstraction has 46032 states and 180239 transitions. [2021-07-13 20:44:53,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:53,111 INFO L276 IsEmpty]: Start isEmpty. Operand 46032 states and 180239 transitions. [2021-07-13 20:44:53,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:44:53,200 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:53,200 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:53,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4063,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:53,416 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:53,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:53,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1566567380, now seen corresponding path program 149 times [2021-07-13 20:44:53,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:53,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679402380] [2021-07-13 20:44:53,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:53,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:53,448 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:44:53,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:53,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679402380] [2021-07-13 20:44:53,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679402380] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:53,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391523692] [2021-07-13 20:44:53,448 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 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 [2021-07-13 20:44:53,472 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:44:53,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:53,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:44:53,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:53,563 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:53,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391523692] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:53,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:53,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:44:53,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592307879] [2021-07-13 20:44:53,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:44:53,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:53,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:44:53,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:44:53,564 INFO L87 Difference]: Start difference. First operand 46032 states and 180239 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:55,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:55,018 INFO L93 Difference]: Finished difference Result 67202 states and 252555 transitions. [2021-07-13 20:44:55,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-07-13 20:44:55,018 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:44:55,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:55,279 INFO L225 Difference]: With dead ends: 67202 [2021-07-13 20:44:55,279 INFO L226 Difference]: Without dead ends: 67202 [2021-07-13 20:44:55,280 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 493.6ms TimeCoverageRelationStatistics Valid=878, Invalid=3412, Unknown=0, NotChecked=0, Total=4290 [2021-07-13 20:44:55,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67202 states. [2021-07-13 20:44:57,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67202 to 46128. [2021-07-13 20:44:57,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46128 states, 46127 states have (on average 3.9142584603377633) internal successors, (180553), 46127 states have internal predecessors, (180553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:57,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46128 states to 46128 states and 180553 transitions. [2021-07-13 20:44:57,560 INFO L78 Accepts]: Start accepts. Automaton has 46128 states and 180553 transitions. Word has length 28 [2021-07-13 20:44:57,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:57,560 INFO L482 AbstractCegarLoop]: Abstraction has 46128 states and 180553 transitions. [2021-07-13 20:44:57,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:57,560 INFO L276 IsEmpty]: Start isEmpty. Operand 46128 states and 180553 transitions. [2021-07-13 20:44:57,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:44:57,660 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:57,660 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:57,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4064 [2021-07-13 20:44:57,876 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:57,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:57,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1085360762, now seen corresponding path program 150 times [2021-07-13 20:44:57,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:57,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062851180] [2021-07-13 20:44:57,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:57,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:57,907 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:44:57,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:57,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062851180] [2021-07-13 20:44:57,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062851180] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:57,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007320571] [2021-07-13 20:44:57,907 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 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 [2021-07-13 20:44:57,931 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:44:57,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:57,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:44:57,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:58,014 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:58,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007320571] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:58,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:58,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:44:58,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793406239] [2021-07-13 20:44:58,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:44:58,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:58,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:44:58,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:44:58,015 INFO L87 Difference]: Start difference. First operand 46128 states and 180553 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:59,005 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2021-07-13 20:44:59,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:59,420 INFO L93 Difference]: Finished difference Result 66883 states and 251651 transitions. [2021-07-13 20:44:59,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 20:44:59,421 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:44:59,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:59,694 INFO L225 Difference]: With dead ends: 66883 [2021-07-13 20:44:59,695 INFO L226 Difference]: Without dead ends: 66875 [2021-07-13 20:44:59,695 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1130 ImplicationChecksByTransitivity, 744.7ms TimeCoverageRelationStatistics Valid=716, Invalid=2590, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:44:59,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66875 states. [2021-07-13 20:45:01,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66875 to 46060. [2021-07-13 20:45:01,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46060 states, 46059 states have (on average 3.9154345513363293) internal successors, (180341), 46059 states have internal predecessors, (180341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:01,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46060 states to 46060 states and 180341 transitions. [2021-07-13 20:45:01,717 INFO L78 Accepts]: Start accepts. Automaton has 46060 states and 180341 transitions. Word has length 28 [2021-07-13 20:45:01,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:01,717 INFO L482 AbstractCegarLoop]: Abstraction has 46060 states and 180341 transitions. [2021-07-13 20:45:01,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:01,717 INFO L276 IsEmpty]: Start isEmpty. Operand 46060 states and 180341 transitions. [2021-07-13 20:45:01,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:01,811 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:01,811 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:45:02,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4065 [2021-07-13 20:45:02,026 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:02,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:02,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1942149356, now seen corresponding path program 151 times [2021-07-13 20:45:02,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:02,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908266423] [2021-07-13 20:45:02,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:02,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:02,060 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:45:02,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:02,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908266423] [2021-07-13 20:45:02,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908266423] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:02,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744479384] [2021-07-13 20:45:02,060 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 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 [2021-07-13 20:45:02,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:02,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:02,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:02,166 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:02,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744479384] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:02,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:02,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-13 20:45:02,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476866266] [2021-07-13 20:45:02,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:45:02,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:02,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:45:02,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:45:02,167 INFO L87 Difference]: Start difference. First operand 46060 states and 180341 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:02,629 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2021-07-13 20:45:03,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:03,530 INFO L93 Difference]: Finished difference Result 65614 states and 248140 transitions. [2021-07-13 20:45:03,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:45:03,531 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:45:03,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:04,023 INFO L225 Difference]: With dead ends: 65614 [2021-07-13 20:45:04,024 INFO L226 Difference]: Without dead ends: 65590 [2021-07-13 20:45:04,024 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 727.5ms TimeCoverageRelationStatistics Valid=487, Invalid=1675, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:45:04,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65590 states. [2021-07-13 20:45:05,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65590 to 46036. [2021-07-13 20:45:05,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46036 states, 46035 states have (on average 3.915564244596503) internal successors, (180253), 46035 states have internal predecessors, (180253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:06,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46036 states to 46036 states and 180253 transitions. [2021-07-13 20:45:06,279 INFO L78 Accepts]: Start accepts. Automaton has 46036 states and 180253 transitions. Word has length 28 [2021-07-13 20:45:06,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:06,279 INFO L482 AbstractCegarLoop]: Abstraction has 46036 states and 180253 transitions. [2021-07-13 20:45:06,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:06,279 INFO L276 IsEmpty]: Start isEmpty. Operand 46036 states and 180253 transitions. [2021-07-13 20:45:06,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:06,401 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:06,401 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:45:06,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4066 [2021-07-13 20:45:06,617 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:06,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:06,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1119483464, now seen corresponding path program 152 times [2021-07-13 20:45:06,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:06,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482588951] [2021-07-13 20:45:06,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:06,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:06,655 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:06,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:06,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482588951] [2021-07-13 20:45:06,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482588951] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:06,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052191635] [2021-07-13 20:45:06,656 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 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 [2021-07-13 20:45:06,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:45:06,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:06,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:06,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:06,757 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:06,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052191635] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:06,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:06,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 20:45:06,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803799489] [2021-07-13 20:45:06,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:45:06,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:06,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:45:06,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:45:06,758 INFO L87 Difference]: Start difference. First operand 46036 states and 180253 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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) [2021-07-13 20:45:08,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:08,592 INFO L93 Difference]: Finished difference Result 68913 states and 257576 transitions. [2021-07-13 20:45:08,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-07-13 20:45:08,593 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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 28 [2021-07-13 20:45:08,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:08,879 INFO L225 Difference]: With dead ends: 68913 [2021-07-13 20:45:08,879 INFO L226 Difference]: Without dead ends: 68913 [2021-07-13 20:45:08,880 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2861 ImplicationChecksByTransitivity, 1058.0ms TimeCoverageRelationStatistics Valid=1421, Invalid=5889, Unknown=0, NotChecked=0, Total=7310 [2021-07-13 20:45:08,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68913 states. [2021-07-13 20:45:10,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68913 to 50828. [2021-07-13 20:45:11,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50828 states, 50827 states have (on average 3.8652881342593504) internal successors, (196461), 50827 states have internal predecessors, (196461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:11,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50828 states to 50828 states and 196461 transitions. [2021-07-13 20:45:11,640 INFO L78 Accepts]: Start accepts. Automaton has 50828 states and 196461 transitions. Word has length 28 [2021-07-13 20:45:11,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:11,640 INFO L482 AbstractCegarLoop]: Abstraction has 50828 states and 196461 transitions. [2021-07-13 20:45:11,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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) [2021-07-13 20:45:11,640 INFO L276 IsEmpty]: Start isEmpty. Operand 50828 states and 196461 transitions. [2021-07-13 20:45:11,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:11,751 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:11,751 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:45:11,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4067 [2021-07-13 20:45:11,967 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:11,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:11,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1200859552, now seen corresponding path program 153 times [2021-07-13 20:45:11,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:11,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297545931] [2021-07-13 20:45:11,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:11,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:12,002 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:12,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:12,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297545931] [2021-07-13 20:45:12,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297545931] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:12,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879728486] [2021-07-13 20:45:12,002 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 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 [2021-07-13 20:45:12,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:45:12,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:12,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:12,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:12,085 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:12,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879728486] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:12,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:12,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 20:45:12,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196233983] [2021-07-13 20:45:12,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:45:12,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:12,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:45:12,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:45:12,086 INFO L87 Difference]: Start difference. First operand 50828 states and 196461 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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) [2021-07-13 20:45:13,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:13,698 INFO L93 Difference]: Finished difference Result 68143 states and 255462 transitions. [2021-07-13 20:45:13,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-13 20:45:13,698 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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 28 [2021-07-13 20:45:13,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:13,979 INFO L225 Difference]: With dead ends: 68143 [2021-07-13 20:45:13,979 INFO L226 Difference]: Without dead ends: 68135 [2021-07-13 20:45:13,979 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1927 ImplicationChecksByTransitivity, 901.3ms TimeCoverageRelationStatistics Valid=1035, Invalid=4221, Unknown=0, NotChecked=0, Total=5256 [2021-07-13 20:45:14,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68135 states. [2021-07-13 20:45:15,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68135 to 49664. [2021-07-13 20:45:16,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49664 states, 49663 states have (on average 3.8827900046312145) internal successors, (192831), 49663 states have internal predecessors, (192831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:16,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49664 states to 49664 states and 192831 transitions. [2021-07-13 20:45:16,214 INFO L78 Accepts]: Start accepts. Automaton has 49664 states and 192831 transitions. Word has length 28 [2021-07-13 20:45:16,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:16,214 INFO L482 AbstractCegarLoop]: Abstraction has 49664 states and 192831 transitions. [2021-07-13 20:45:16,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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) [2021-07-13 20:45:16,214 INFO L276 IsEmpty]: Start isEmpty. Operand 49664 states and 192831 transitions. [2021-07-13 20:45:16,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:16,322 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:16,322 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:45:16,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4068 [2021-07-13 20:45:16,533 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:16,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:16,533 INFO L82 PathProgramCache]: Analyzing trace with hash -314232420, now seen corresponding path program 154 times [2021-07-13 20:45:16,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:16,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385568899] [2021-07-13 20:45:16,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:16,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:16,570 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:16,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:16,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385568899] [2021-07-13 20:45:16,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385568899] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:16,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053865697] [2021-07-13 20:45:16,570 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 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 [2021-07-13 20:45:16,594 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:45:16,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:16,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:16,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:16,814 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-13 20:45:16,876 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:16,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053865697] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:16,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:16,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 20:45:16,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718016257] [2021-07-13 20:45:16,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:45:16,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:16,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:45:16,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:45:16,877 INFO L87 Difference]: Start difference. First operand 49664 states and 192831 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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) [2021-07-13 20:45:18,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:18,352 INFO L93 Difference]: Finished difference Result 66443 states and 250710 transitions. [2021-07-13 20:45:18,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-13 20:45:18,361 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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 28 [2021-07-13 20:45:18,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:18,624 INFO L225 Difference]: With dead ends: 66443 [2021-07-13 20:45:18,624 INFO L226 Difference]: Without dead ends: 66419 [2021-07-13 20:45:18,625 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1369 ImplicationChecksByTransitivity, 814.6ms TimeCoverageRelationStatistics Valid=814, Invalid=3218, Unknown=0, NotChecked=0, Total=4032 [2021-07-13 20:45:18,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66419 states. [2021-07-13 20:45:20,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66419 to 49644. [2021-07-13 20:45:20,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49644 states, 49643 states have (on average 3.8810507020123683) internal successors, (192667), 49643 states have internal predecessors, (192667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:20,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49644 states to 49644 states and 192667 transitions. [2021-07-13 20:45:20,827 INFO L78 Accepts]: Start accepts. Automaton has 49644 states and 192667 transitions. Word has length 28 [2021-07-13 20:45:20,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:20,827 INFO L482 AbstractCegarLoop]: Abstraction has 49644 states and 192667 transitions. [2021-07-13 20:45:20,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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) [2021-07-13 20:45:20,827 INFO L276 IsEmpty]: Start isEmpty. Operand 49644 states and 192667 transitions. [2021-07-13 20:45:20,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:20,927 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:20,927 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:45:21,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4069,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:21,132 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:21,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:21,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1316197732, now seen corresponding path program 155 times [2021-07-13 20:45:21,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:21,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082166499] [2021-07-13 20:45:21,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:21,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:21,169 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:21,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:21,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082166499] [2021-07-13 20:45:21,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082166499] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:21,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758966407] [2021-07-13 20:45:21,169 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 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 [2021-07-13 20:45:21,195 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:45:21,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:21,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:21,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:21,263 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:21,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758966407] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:21,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:21,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 20:45:21,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482456317] [2021-07-13 20:45:21,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:45:21,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:21,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:45:21,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:45:21,264 INFO L87 Difference]: Start difference. First operand 49644 states and 192667 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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) [2021-07-13 20:45:22,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:22,757 INFO L93 Difference]: Finished difference Result 67813 states and 254591 transitions. [2021-07-13 20:45:22,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-13 20:45:22,757 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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 28 [2021-07-13 20:45:22,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:23,251 INFO L225 Difference]: With dead ends: 67813 [2021-07-13 20:45:23,251 INFO L226 Difference]: Without dead ends: 67773 [2021-07-13 20:45:23,251 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 824.5ms TimeCoverageRelationStatistics Valid=722, Invalid=2818, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:45:23,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67773 states. [2021-07-13 20:45:24,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67773 to 49798. [2021-07-13 20:45:24,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49798 states, 49797 states have (on average 3.880394401269153) internal successors, (193232), 49797 states have internal predecessors, (193232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:25,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49798 states to 49798 states and 193232 transitions. [2021-07-13 20:45:25,394 INFO L78 Accepts]: Start accepts. Automaton has 49798 states and 193232 transitions. Word has length 28 [2021-07-13 20:45:25,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:25,394 INFO L482 AbstractCegarLoop]: Abstraction has 49798 states and 193232 transitions. [2021-07-13 20:45:25,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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) [2021-07-13 20:45:25,395 INFO L276 IsEmpty]: Start isEmpty. Operand 49798 states and 193232 transitions. [2021-07-13 20:45:25,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:25,496 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:25,496 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:45:25,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4070 [2021-07-13 20:45:25,709 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:25,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:25,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1262992088, now seen corresponding path program 156 times [2021-07-13 20:45:25,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:25,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219708166] [2021-07-13 20:45:25,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:25,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:25,745 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:25,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:25,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219708166] [2021-07-13 20:45:25,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219708166] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:25,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632975203] [2021-07-13 20:45:25,745 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 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 [2021-07-13 20:45:25,778 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:45:25,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:25,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:25,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:25,888 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:25,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632975203] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:25,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:25,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 20:45:25,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174727341] [2021-07-13 20:45:25,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:45:25,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:25,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:45:25,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:45:25,889 INFO L87 Difference]: Start difference. First operand 49798 states and 193232 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:27,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:27,733 INFO L93 Difference]: Finished difference Result 66932 states and 251929 transitions. [2021-07-13 20:45:27,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-07-13 20:45:27,734 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:45:27,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:28,010 INFO L225 Difference]: With dead ends: 66932 [2021-07-13 20:45:28,010 INFO L226 Difference]: Without dead ends: 66932 [2021-07-13 20:45:28,010 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2488 ImplicationChecksByTransitivity, 1072.2ms TimeCoverageRelationStatistics Valid=1250, Invalid=5392, Unknown=0, NotChecked=0, Total=6642 [2021-07-13 20:45:28,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66932 states. [2021-07-13 20:45:29,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66932 to 50703. [2021-07-13 20:45:29,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50703 states, 50702 states have (on average 3.871701313557651) internal successors, (196303), 50702 states have internal predecessors, (196303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:30,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50703 states to 50703 states and 196303 transitions. [2021-07-13 20:45:30,102 INFO L78 Accepts]: Start accepts. Automaton has 50703 states and 196303 transitions. Word has length 28 [2021-07-13 20:45:30,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:30,102 INFO L482 AbstractCegarLoop]: Abstraction has 50703 states and 196303 transitions. [2021-07-13 20:45:30,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:30,102 INFO L276 IsEmpty]: Start isEmpty. Operand 50703 states and 196303 transitions. [2021-07-13 20:45:30,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:30,203 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:30,203 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:45:30,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4071,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:30,419 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:30,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:30,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1388936054, now seen corresponding path program 157 times [2021-07-13 20:45:30,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:30,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672594614] [2021-07-13 20:45:30,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:30,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:30,719 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:30,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:30,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672594614] [2021-07-13 20:45:30,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672594614] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:30,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600202347] [2021-07-13 20:45:30,720 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 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 [2021-07-13 20:45:30,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:30,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:30,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:30,857 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:30,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600202347] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:30,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:30,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 20:45:30,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412322706] [2021-07-13 20:45:30,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:45:30,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:30,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:45:30,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:45:30,858 INFO L87 Difference]: Start difference. First operand 50703 states and 196303 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:32,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:32,350 INFO L93 Difference]: Finished difference Result 66428 states and 250518 transitions. [2021-07-13 20:45:32,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-13 20:45:32,350 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:45:32,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:32,612 INFO L225 Difference]: With dead ends: 66428 [2021-07-13 20:45:32,612 INFO L226 Difference]: Without dead ends: 66420 [2021-07-13 20:45:32,612 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 667.0ms TimeCoverageRelationStatistics Valid=973, Invalid=3857, Unknown=0, NotChecked=0, Total=4830 [2021-07-13 20:45:32,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66420 states. [2021-07-13 20:45:34,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66420 to 50627. [2021-07-13 20:45:34,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50627 states, 50626 states have (on average 3.8728518942835697) internal successors, (196067), 50626 states have internal predecessors, (196067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:34,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50627 states to 50627 states and 196067 transitions. [2021-07-13 20:45:34,752 INFO L78 Accepts]: Start accepts. Automaton has 50627 states and 196067 transitions. Word has length 28 [2021-07-13 20:45:34,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:34,752 INFO L482 AbstractCegarLoop]: Abstraction has 50627 states and 196067 transitions. [2021-07-13 20:45:34,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:34,752 INFO L276 IsEmpty]: Start isEmpty. Operand 50627 states and 196067 transitions. [2021-07-13 20:45:34,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:34,843 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:34,843 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:45:35,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4072 [2021-07-13 20:45:35,058 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:35,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:35,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1638574064, now seen corresponding path program 158 times [2021-07-13 20:45:35,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:35,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924304789] [2021-07-13 20:45:35,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:35,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:35,096 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:35,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:35,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924304789] [2021-07-13 20:45:35,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924304789] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:35,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530796588] [2021-07-13 20:45:35,097 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 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 [2021-07-13 20:45:35,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:45:35,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:35,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:35,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:35,209 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:35,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530796588] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:35,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:35,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:45:35,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533925829] [2021-07-13 20:45:35,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:45:35,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:35,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:45:35,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:45:35,210 INFO L87 Difference]: Start difference. First operand 50627 states and 196067 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:35,699 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 11 [2021-07-13 20:45:36,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:36,956 INFO L93 Difference]: Finished difference Result 65905 states and 249272 transitions. [2021-07-13 20:45:36,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-13 20:45:36,957 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:45:36,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:37,215 INFO L225 Difference]: With dead ends: 65905 [2021-07-13 20:45:37,216 INFO L226 Difference]: Without dead ends: 65881 [2021-07-13 20:45:37,216 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1250 ImplicationChecksByTransitivity, 819.2ms TimeCoverageRelationStatistics Valid=750, Invalid=3032, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 20:45:37,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65881 states. [2021-07-13 20:45:38,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65881 to 50613. [2021-07-13 20:45:38,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50613 states, 50612 states have (on average 3.872836481466846) internal successors, (196012), 50612 states have internal predecessors, (196012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:39,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50613 states to 50613 states and 196012 transitions. [2021-07-13 20:45:39,440 INFO L78 Accepts]: Start accepts. Automaton has 50613 states and 196012 transitions. Word has length 28 [2021-07-13 20:45:39,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:39,440 INFO L482 AbstractCegarLoop]: Abstraction has 50613 states and 196012 transitions. [2021-07-13 20:45:39,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:39,440 INFO L276 IsEmpty]: Start isEmpty. Operand 50613 states and 196012 transitions. [2021-07-13 20:45:39,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:39,542 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:39,542 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:45:39,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4073,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:39,758 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:39,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:39,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1972807316, now seen corresponding path program 159 times [2021-07-13 20:45:39,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:39,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612594643] [2021-07-13 20:45:39,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:39,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:39,795 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:39,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:39,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612594643] [2021-07-13 20:45:39,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612594643] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:39,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255173019] [2021-07-13 20:45:39,795 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 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 [2021-07-13 20:45:39,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:45:39,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:39,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:39,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:39,893 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:39,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255173019] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:39,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:39,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-13 20:45:39,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663803783] [2021-07-13 20:45:39,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:45:39,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:39,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:45:39,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:45:39,894 INFO L87 Difference]: Start difference. First operand 50613 states and 196012 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 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) [2021-07-13 20:45:40,780 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2021-07-13 20:45:41,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:41,375 INFO L93 Difference]: Finished difference Result 65687 states and 248579 transitions. [2021-07-13 20:45:41,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-13 20:45:41,376 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 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 28 [2021-07-13 20:45:41,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:41,630 INFO L225 Difference]: With dead ends: 65687 [2021-07-13 20:45:41,630 INFO L226 Difference]: Without dead ends: 65647 [2021-07-13 20:45:41,631 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1106 ImplicationChecksByTransitivity, 799.0ms TimeCoverageRelationStatistics Valid=696, Invalid=2726, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 20:45:41,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65647 states. [2021-07-13 20:45:43,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65647 to 50962. [2021-07-13 20:45:43,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50962 states, 50961 states have (on average 3.874354898844214) internal successors, (197441), 50961 states have internal predecessors, (197441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:43,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50962 states to 50962 states and 197441 transitions. [2021-07-13 20:45:43,590 INFO L78 Accepts]: Start accepts. Automaton has 50962 states and 197441 transitions. Word has length 28 [2021-07-13 20:45:43,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:43,590 INFO L482 AbstractCegarLoop]: Abstraction has 50962 states and 197441 transitions. [2021-07-13 20:45:43,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 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) [2021-07-13 20:45:43,590 INFO L276 IsEmpty]: Start isEmpty. Operand 50962 states and 197441 transitions. [2021-07-13 20:45:43,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:43,925 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:43,925 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:45:44,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4074 [2021-07-13 20:45:44,141 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:44,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:44,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1825824890, now seen corresponding path program 160 times [2021-07-13 20:45:44,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:44,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5705299] [2021-07-13 20:45:44,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:44,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:44,213 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:44,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:44,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5705299] [2021-07-13 20:45:44,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5705299] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:44,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479853174] [2021-07-13 20:45:44,213 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 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 [2021-07-13 20:45:44,238 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:45:44,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:44,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:44,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:44,334 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:44,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479853174] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:44,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:44,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:45:44,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445869303] [2021-07-13 20:45:44,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:45:44,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:44,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:45:44,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:45:44,335 INFO L87 Difference]: Start difference. First operand 50962 states and 197441 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:45,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:45,946 INFO L93 Difference]: Finished difference Result 79769 states and 298419 transitions. [2021-07-13 20:45:45,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-13 20:45:45,947 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:45:45,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:46,244 INFO L225 Difference]: With dead ends: 79769 [2021-07-13 20:45:46,244 INFO L226 Difference]: Without dead ends: 79769 [2021-07-13 20:45:46,244 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 656.9ms TimeCoverageRelationStatistics Valid=901, Invalid=3131, Unknown=0, NotChecked=0, Total=4032 [2021-07-13 20:45:46,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79769 states. [2021-07-13 20:45:48,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79769 to 52128. [2021-07-13 20:45:48,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52128 states, 52127 states have (on average 3.8865846873980856) internal successors, (202596), 52127 states have internal predecessors, (202596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:48,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52128 states to 52128 states and 202596 transitions. [2021-07-13 20:45:48,447 INFO L78 Accepts]: Start accepts. Automaton has 52128 states and 202596 transitions. Word has length 28 [2021-07-13 20:45:48,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:48,447 INFO L482 AbstractCegarLoop]: Abstraction has 52128 states and 202596 transitions. [2021-07-13 20:45:48,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:48,448 INFO L276 IsEmpty]: Start isEmpty. Operand 52128 states and 202596 transitions. [2021-07-13 20:45:49,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:49,040 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:49,040 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:45:49,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4075 [2021-07-13 20:45:49,241 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:49,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:49,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1151103012, now seen corresponding path program 161 times [2021-07-13 20:45:49,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:49,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003391794] [2021-07-13 20:45:49,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:49,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:49,277 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:49,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:49,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003391794] [2021-07-13 20:45:49,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003391794] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:49,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662099712] [2021-07-13 20:45:49,277 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 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 [2021-07-13 20:45:49,302 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:45:49,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:49,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:49,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:49,399 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:49,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662099712] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:49,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:49,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:45:49,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090741697] [2021-07-13 20:45:49,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:45:49,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:49,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:45:49,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:45:49,400 INFO L87 Difference]: Start difference. First operand 52128 states and 202596 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:50,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:50,941 INFO L93 Difference]: Finished difference Result 72910 states and 276752 transitions. [2021-07-13 20:45:50,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-13 20:45:50,942 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:45:50,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:51,227 INFO L225 Difference]: With dead ends: 72910 [2021-07-13 20:45:51,227 INFO L226 Difference]: Without dead ends: 72910 [2021-07-13 20:45:51,227 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1173 ImplicationChecksByTransitivity, 586.3ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 20:45:51,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72910 states. [2021-07-13 20:45:53,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72910 to 52158. [2021-07-13 20:45:53,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52158 states, 52157 states have (on average 3.886400674885442) internal successors, (202703), 52157 states have internal predecessors, (202703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:53,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52158 states to 52158 states and 202703 transitions. [2021-07-13 20:45:53,370 INFO L78 Accepts]: Start accepts. Automaton has 52158 states and 202703 transitions. Word has length 28 [2021-07-13 20:45:53,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:53,370 INFO L482 AbstractCegarLoop]: Abstraction has 52158 states and 202703 transitions. [2021-07-13 20:45:53,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:53,370 INFO L276 IsEmpty]: Start isEmpty. Operand 52158 states and 202703 transitions. [2021-07-13 20:45:53,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:53,471 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:53,471 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:45:53,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4076 [2021-07-13 20:45:53,685 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:53,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:53,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1490504108, now seen corresponding path program 162 times [2021-07-13 20:45:53,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:53,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879040783] [2021-07-13 20:45:53,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:53,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:53,721 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:53,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:53,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879040783] [2021-07-13 20:45:53,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879040783] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:53,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050284091] [2021-07-13 20:45:53,722 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 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 [2021-07-13 20:45:53,746 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:45:53,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:53,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:53,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:53,994 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-07-13 20:45:54,155 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:54,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050284091] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:54,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:54,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 20:45:54,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593141089] [2021-07-13 20:45:54,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:45:54,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:54,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:45:54,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:45:54,157 INFO L87 Difference]: Start difference. First operand 52158 states and 202703 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:55,551 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-07-13 20:45:55,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:55,984 INFO L93 Difference]: Finished difference Result 73768 states and 279188 transitions. [2021-07-13 20:45:55,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-07-13 20:45:55,985 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:45:55,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:56,307 INFO L225 Difference]: With dead ends: 73768 [2021-07-13 20:45:56,307 INFO L226 Difference]: Without dead ends: 73768 [2021-07-13 20:45:56,307 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2900 ImplicationChecksByTransitivity, 1330.9ms TimeCoverageRelationStatistics Valid=1557, Invalid=5925, Unknown=0, NotChecked=0, Total=7482 [2021-07-13 20:45:56,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73768 states. [2021-07-13 20:45:58,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73768 to 52422. [2021-07-13 20:45:58,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52422 states, 52421 states have (on average 3.8831956658591023) internal successors, (203561), 52421 states have internal predecessors, (203561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:58,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52422 states to 52422 states and 203561 transitions. [2021-07-13 20:45:58,518 INFO L78 Accepts]: Start accepts. Automaton has 52422 states and 203561 transitions. Word has length 28 [2021-07-13 20:45:58,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:58,518 INFO L482 AbstractCegarLoop]: Abstraction has 52422 states and 203561 transitions. [2021-07-13 20:45:58,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:58,518 INFO L276 IsEmpty]: Start isEmpty. Operand 52422 states and 203561 transitions. [2021-07-13 20:45:58,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:58,867 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:58,867 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:45:59,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4077 [2021-07-13 20:45:59,067 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:59,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:59,068 INFO L82 PathProgramCache]: Analyzing trace with hash 152535046, now seen corresponding path program 163 times [2021-07-13 20:45:59,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:59,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746503841] [2021-07-13 20:45:59,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:59,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:59,103 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:59,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:59,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746503841] [2021-07-13 20:45:59,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746503841] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:59,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792392740] [2021-07-13 20:45:59,104 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 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 [2021-07-13 20:45:59,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:59,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:59,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:59,214 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:59,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792392740] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:59,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:59,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 20:45:59,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455687111] [2021-07-13 20:45:59,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:45:59,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:59,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:45:59,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:45:59,215 INFO L87 Difference]: Start difference. First operand 52422 states and 203561 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:00,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:00,940 INFO L93 Difference]: Finished difference Result 72980 states and 276953 transitions. [2021-07-13 20:46:00,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-13 20:46:00,940 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:46:00,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:01,239 INFO L225 Difference]: With dead ends: 72980 [2021-07-13 20:46:01,239 INFO L226 Difference]: Without dead ends: 72976 [2021-07-13 20:46:01,239 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1775 ImplicationChecksByTransitivity, 920.4ms TimeCoverageRelationStatistics Valid=1139, Invalid=3831, Unknown=0, NotChecked=0, Total=4970 [2021-07-13 20:46:01,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72976 states. [2021-07-13 20:46:03,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72976 to 52058. [2021-07-13 20:46:03,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52058 states, 52057 states have (on average 3.8866050675221393) internal successors, (202325), 52057 states have internal predecessors, (202325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:03,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52058 states to 52058 states and 202325 transitions. [2021-07-13 20:46:03,540 INFO L78 Accepts]: Start accepts. Automaton has 52058 states and 202325 transitions. Word has length 28 [2021-07-13 20:46:03,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:03,540 INFO L482 AbstractCegarLoop]: Abstraction has 52058 states and 202325 transitions. [2021-07-13 20:46:03,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:03,541 INFO L276 IsEmpty]: Start isEmpty. Operand 52058 states and 202325 transitions. [2021-07-13 20:46:04,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:46:04,122 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:04,122 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:04,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4078 [2021-07-13 20:46:04,352 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:04,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:04,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1936993134, now seen corresponding path program 164 times [2021-07-13 20:46:04,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:04,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861639450] [2021-07-13 20:46:04,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:04,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:04,389 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:04,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:04,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861639450] [2021-07-13 20:46:04,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861639450] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:04,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214769402] [2021-07-13 20:46:04,389 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 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 [2021-07-13 20:46:04,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:46:04,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:04,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:46:04,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:04,499 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:04,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214769402] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:04,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:04,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:46:04,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892443907] [2021-07-13 20:46:04,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:46:04,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:04,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:46:04,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:46:04,501 INFO L87 Difference]: Start difference. First operand 52058 states and 202325 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:05,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:05,722 INFO L93 Difference]: Finished difference Result 66943 states and 255942 transitions. [2021-07-13 20:46:05,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 20:46:05,723 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:46:05,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:05,970 INFO L225 Difference]: With dead ends: 66943 [2021-07-13 20:46:05,970 INFO L226 Difference]: Without dead ends: 66943 [2021-07-13 20:46:05,970 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 450.8ms TimeCoverageRelationStatistics Valid=608, Invalid=2148, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 20:46:06,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66943 states. [2021-07-13 20:46:07,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66943 to 52074. [2021-07-13 20:46:07,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52074 states, 52073 states have (on average 3.8882530294010333) internal successors, (202473), 52073 states have internal predecessors, (202473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:08,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52074 states to 52074 states and 202473 transitions. [2021-07-13 20:46:08,100 INFO L78 Accepts]: Start accepts. Automaton has 52074 states and 202473 transitions. Word has length 28 [2021-07-13 20:46:08,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:08,100 INFO L482 AbstractCegarLoop]: Abstraction has 52074 states and 202473 transitions. [2021-07-13 20:46:08,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:08,100 INFO L276 IsEmpty]: Start isEmpty. Operand 52074 states and 202473 transitions. [2021-07-13 20:46:08,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:46:08,201 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:08,201 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:08,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4079 [2021-07-13 20:46:08,417 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:08,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:08,417 INFO L82 PathProgramCache]: Analyzing trace with hash -756673454, now seen corresponding path program 165 times [2021-07-13 20:46:08,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:08,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683319522] [2021-07-13 20:46:08,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:08,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:08,453 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:08,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:08,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683319522] [2021-07-13 20:46:08,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683319522] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:08,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117173209] [2021-07-13 20:46:08,453 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 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 [2021-07-13 20:46:08,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:46:08,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:08,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:46:08,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:08,554 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:08,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117173209] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:08,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:08,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:46:08,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342131026] [2021-07-13 20:46:08,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:46:08,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:08,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:46:08,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:46:08,555 INFO L87 Difference]: Start difference. First operand 52074 states and 202473 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:09,114 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2021-07-13 20:46:09,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:09,627 INFO L93 Difference]: Finished difference Result 66257 states and 254067 transitions. [2021-07-13 20:46:09,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:46:09,627 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:46:09,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:09,904 INFO L225 Difference]: With dead ends: 66257 [2021-07-13 20:46:09,904 INFO L226 Difference]: Without dead ends: 66245 [2021-07-13 20:46:09,905 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 542.2ms TimeCoverageRelationStatistics Valid=448, Invalid=1532, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:46:10,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66245 states. [2021-07-13 20:46:11,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66245 to 52008. [2021-07-13 20:46:11,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52008 states, 52007 states have (on average 3.889284134828004) internal successors, (202270), 52007 states have internal predecessors, (202270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:12,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52008 states to 52008 states and 202270 transitions. [2021-07-13 20:46:12,022 INFO L78 Accepts]: Start accepts. Automaton has 52008 states and 202270 transitions. Word has length 28 [2021-07-13 20:46:12,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:12,022 INFO L482 AbstractCegarLoop]: Abstraction has 52008 states and 202270 transitions. [2021-07-13 20:46:12,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:12,022 INFO L276 IsEmpty]: Start isEmpty. Operand 52008 states and 202270 transitions. [2021-07-13 20:46:12,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:46:12,134 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:12,134 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:12,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4080 [2021-07-13 20:46:12,345 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:12,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:12,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1537074702, now seen corresponding path program 166 times [2021-07-13 20:46:12,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:12,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472535057] [2021-07-13 20:46:12,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:12,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:12,385 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:12,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:12,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472535057] [2021-07-13 20:46:12,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472535057] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:12,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105803182] [2021-07-13 20:46:12,386 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 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 [2021-07-13 20:46:12,649 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:46:12,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:12,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:46:12,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:12,744 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:12,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105803182] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:12,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:12,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:46:12,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059416824] [2021-07-13 20:46:12,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:46:12,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:12,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:46:12,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:46:12,745 INFO L87 Difference]: Start difference. First operand 52008 states and 202270 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:13,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:13,587 INFO L93 Difference]: Finished difference Result 56548 states and 217322 transitions. [2021-07-13 20:46:13,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:46:13,587 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:46:13,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:14,163 INFO L225 Difference]: With dead ends: 56548 [2021-07-13 20:46:14,163 INFO L226 Difference]: Without dead ends: 56548 [2021-07-13 20:46:14,163 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 354.2ms TimeCoverageRelationStatistics Valid=323, Invalid=1159, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:46:14,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56548 states. [2021-07-13 20:46:15,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56548 to 52216. [2021-07-13 20:46:15,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52216 states, 52215 states have (on average 3.8870439528871015) internal successors, (202962), 52215 states have internal predecessors, (202962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:15,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52216 states to 52216 states and 202962 transitions. [2021-07-13 20:46:15,847 INFO L78 Accepts]: Start accepts. Automaton has 52216 states and 202962 transitions. Word has length 28 [2021-07-13 20:46:15,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:15,848 INFO L482 AbstractCegarLoop]: Abstraction has 52216 states and 202962 transitions. [2021-07-13 20:46:15,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:15,848 INFO L276 IsEmpty]: Start isEmpty. Operand 52216 states and 202962 transitions. [2021-07-13 20:46:15,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:46:15,955 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:15,955 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:16,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4081,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:16,169 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:16,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:16,169 INFO L82 PathProgramCache]: Analyzing trace with hash 538506736, now seen corresponding path program 167 times [2021-07-13 20:46:16,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:16,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153419466] [2021-07-13 20:46:16,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:16,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:16,203 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:16,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:16,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153419466] [2021-07-13 20:46:16,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153419466] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:16,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978154338] [2021-07-13 20:46:16,203 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 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 [2021-07-13 20:46:16,495 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:46:16,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:16,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:46:16,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:16,589 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:16,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978154338] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:16,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:16,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 20:46:16,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919949850] [2021-07-13 20:46:16,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:46:16,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:16,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:46:16,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:46:16,590 INFO L87 Difference]: Start difference. First operand 52216 states and 202962 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:17,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:17,276 INFO L93 Difference]: Finished difference Result 56395 states and 216924 transitions. [2021-07-13 20:46:17,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:46:17,277 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:46:17,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:17,699 INFO L225 Difference]: With dead ends: 56395 [2021-07-13 20:46:17,699 INFO L226 Difference]: Without dead ends: 56391 [2021-07-13 20:46:17,700 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 254.9ms TimeCoverageRelationStatistics Valid=247, Invalid=809, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:46:17,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56391 states. [2021-07-13 20:46:18,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56391 to 52156. [2021-07-13 20:46:19,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52156 states, 52155 states have (on average 3.887834339948231) internal successors, (202770), 52155 states have internal predecessors, (202770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:19,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52156 states to 52156 states and 202770 transitions. [2021-07-13 20:46:19,244 INFO L78 Accepts]: Start accepts. Automaton has 52156 states and 202770 transitions. Word has length 28 [2021-07-13 20:46:19,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:19,244 INFO L482 AbstractCegarLoop]: Abstraction has 52156 states and 202770 transitions. [2021-07-13 20:46:19,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:19,244 INFO L276 IsEmpty]: Start isEmpty. Operand 52156 states and 202770 transitions. [2021-07-13 20:46:19,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:46:19,340 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:19,340 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:19,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4082 [2021-07-13 20:46:19,545 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:19,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:19,545 INFO L82 PathProgramCache]: Analyzing trace with hash 508703680, now seen corresponding path program 80 times [2021-07-13 20:46:19,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:19,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167866994] [2021-07-13 20:46:19,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:19,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:19,587 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:19,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:19,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167866994] [2021-07-13 20:46:19,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167866994] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:19,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692358535] [2021-07-13 20:46:19,588 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 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 [2021-07-13 20:46:19,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:46:19,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:19,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:46:19,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:19,924 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 1 [2021-07-13 20:46:19,928 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:19,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692358535] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:19,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:19,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-07-13 20:46:19,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029866775] [2021-07-13 20:46:19,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:46:19,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:19,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:46:19,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:46:19,929 INFO L87 Difference]: Start difference. First operand 52156 states and 202770 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 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) [2021-07-13 20:46:20,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:20,620 INFO L93 Difference]: Finished difference Result 56442 states and 217026 transitions. [2021-07-13 20:46:20,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:46:20,620 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 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 28 [2021-07-13 20:46:20,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:20,813 INFO L225 Difference]: With dead ends: 56442 [2021-07-13 20:46:20,814 INFO L226 Difference]: Without dead ends: 56442 [2021-07-13 20:46:20,814 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 224.5ms TimeCoverageRelationStatistics Valid=275, Invalid=781, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:46:21,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56442 states. [2021-07-13 20:46:22,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56442 to 52260. [2021-07-13 20:46:22,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52260 states, 52259 states have (on average 3.88629709715073) internal successors, (203094), 52259 states have internal predecessors, (203094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:22,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52260 states to 52260 states and 203094 transitions. [2021-07-13 20:46:22,426 INFO L78 Accepts]: Start accepts. Automaton has 52260 states and 203094 transitions. Word has length 28 [2021-07-13 20:46:22,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:22,426 INFO L482 AbstractCegarLoop]: Abstraction has 52260 states and 203094 transitions. [2021-07-13 20:46:22,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 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) [2021-07-13 20:46:22,426 INFO L276 IsEmpty]: Start isEmpty. Operand 52260 states and 203094 transitions. [2021-07-13 20:46:22,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:46:22,521 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:22,521 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:22,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4083,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:22,736 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:22,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:22,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1414052632, now seen corresponding path program 81 times [2021-07-13 20:46:22,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:22,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774887407] [2021-07-13 20:46:22,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:22,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:22,767 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:46:22,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:22,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774887407] [2021-07-13 20:46:22,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774887407] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:22,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968400402] [2021-07-13 20:46:22,767 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 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 [2021-07-13 20:46:22,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:46:22,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:22,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:46:22,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:22,840 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:46:22,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968400402] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:22,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:22,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 20:46:22,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089761433] [2021-07-13 20:46:22,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:46:22,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:22,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:46:22,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:46:22,841 INFO L87 Difference]: Start difference. First operand 52260 states and 203094 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 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) [2021-07-13 20:46:23,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:23,596 INFO L93 Difference]: Finished difference Result 56568 states and 217524 transitions. [2021-07-13 20:46:23,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:46:23,597 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 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 28 [2021-07-13 20:46:23,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:23,789 INFO L225 Difference]: With dead ends: 56568 [2021-07-13 20:46:23,789 INFO L226 Difference]: Without dead ends: 56556 [2021-07-13 20:46:23,789 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 155.9ms TimeCoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:46:23,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56556 states. [2021-07-13 20:46:25,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56556 to 52394. [2021-07-13 20:46:25,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52394 states, 52393 states have (on average 3.8846601645257954) internal successors, (203529), 52393 states have internal predecessors, (203529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:25,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52394 states to 52394 states and 203529 transitions. [2021-07-13 20:46:25,537 INFO L78 Accepts]: Start accepts. Automaton has 52394 states and 203529 transitions. Word has length 28 [2021-07-13 20:46:25,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:25,537 INFO L482 AbstractCegarLoop]: Abstraction has 52394 states and 203529 transitions. [2021-07-13 20:46:25,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 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) [2021-07-13 20:46:25,537 INFO L276 IsEmpty]: Start isEmpty. Operand 52394 states and 203529 transitions. [2021-07-13 20:46:25,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:46:25,627 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:25,627 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:25,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4084 [2021-07-13 20:46:25,843 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:25,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:25,843 INFO L82 PathProgramCache]: Analyzing trace with hash 421559068, now seen corresponding path program 82 times [2021-07-13 20:46:25,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:25,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391012467] [2021-07-13 20:46:25,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:25,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:25,879 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:25,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:25,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391012467] [2021-07-13 20:46:25,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391012467] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:25,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715015245] [2021-07-13 20:46:25,879 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 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 [2021-07-13 20:46:25,903 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:46:25,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:25,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:46:25,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:25,948 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:25,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715015245] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:25,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:25,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-07-13 20:46:25,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105523187] [2021-07-13 20:46:25,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:46:25,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:25,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:46:25,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:46:25,948 INFO L87 Difference]: Start difference. First operand 52394 states and 203529 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 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) [2021-07-13 20:46:26,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:26,749 INFO L93 Difference]: Finished difference Result 56532 states and 217440 transitions. [2021-07-13 20:46:26,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:46:26,749 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 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 28 [2021-07-13 20:46:26,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:26,943 INFO L225 Difference]: With dead ends: 56532 [2021-07-13 20:46:26,943 INFO L226 Difference]: Without dead ends: 56512 [2021-07-13 20:46:26,943 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 177.5ms TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:46:26,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56512 states. [2021-07-13 20:46:28,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56512 to 52394. [2021-07-13 20:46:28,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52394 states, 52393 states have (on average 3.8845838184490296) internal successors, (203525), 52393 states have internal predecessors, (203525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:28,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52394 states to 52394 states and 203525 transitions. [2021-07-13 20:46:28,689 INFO L78 Accepts]: Start accepts. Automaton has 52394 states and 203525 transitions. Word has length 28 [2021-07-13 20:46:28,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:28,689 INFO L482 AbstractCegarLoop]: Abstraction has 52394 states and 203525 transitions. [2021-07-13 20:46:28,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 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) [2021-07-13 20:46:28,689 INFO L276 IsEmpty]: Start isEmpty. Operand 52394 states and 203525 transitions. [2021-07-13 20:46:28,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:46:28,785 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:28,785 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:29,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4085 [2021-07-13 20:46:29,001 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:29,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:29,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1989119940, now seen corresponding path program 168 times [2021-07-13 20:46:29,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:29,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270873942] [2021-07-13 20:46:29,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:29,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:29,034 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:29,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:29,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270873942] [2021-07-13 20:46:29,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270873942] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:29,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415719975] [2021-07-13 20:46:29,034 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 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 [2021-07-13 20:46:29,059 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:46:29,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:29,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:46:29,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:29,118 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:29,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415719975] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:29,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:29,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:46:29,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22746696] [2021-07-13 20:46:29,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:46:29,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:29,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:46:29,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:46:29,119 INFO L87 Difference]: Start difference. First operand 52394 states and 203525 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:29,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:29,964 INFO L93 Difference]: Finished difference Result 57355 states and 221090 transitions. [2021-07-13 20:46:29,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:46:29,964 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:46:29,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:30,191 INFO L225 Difference]: With dead ends: 57355 [2021-07-13 20:46:30,191 INFO L226 Difference]: Without dead ends: 57342 [2021-07-13 20:46:30,191 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 138.3ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:46:30,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57342 states. [2021-07-13 20:46:31,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57342 to 55127. [2021-07-13 20:46:31,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55127 states, 55126 states have (on average 3.891321699379603) internal successors, (214513), 55126 states have internal predecessors, (214513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:32,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55127 states to 55127 states and 214513 transitions. [2021-07-13 20:46:32,252 INFO L78 Accepts]: Start accepts. Automaton has 55127 states and 214513 transitions. Word has length 28 [2021-07-13 20:46:32,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:32,252 INFO L482 AbstractCegarLoop]: Abstraction has 55127 states and 214513 transitions. [2021-07-13 20:46:32,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:32,252 INFO L276 IsEmpty]: Start isEmpty. Operand 55127 states and 214513 transitions. [2021-07-13 20:46:32,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:46:32,437 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:32,437 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:32,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4086 [2021-07-13 20:46:32,654 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:32,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:32,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1306375610, now seen corresponding path program 169 times [2021-07-13 20:46:32,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:32,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142040639] [2021-07-13 20:46:32,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:32,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:32,688 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:32,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:32,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142040639] [2021-07-13 20:46:32,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142040639] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:32,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40396972] [2021-07-13 20:46:32,688 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 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 [2021-07-13 20:46:32,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:32,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:46:32,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:32,770 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:32,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40396972] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:32,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:32,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:46:32,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170390493] [2021-07-13 20:46:32,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:46:32,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:32,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:46:32,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:46:32,773 INFO L87 Difference]: Start difference. First operand 55127 states and 214513 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:33,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:33,716 INFO L93 Difference]: Finished difference Result 61086 states and 233937 transitions. [2021-07-13 20:46:33,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:46:33,716 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:46:33,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:34,026 INFO L225 Difference]: With dead ends: 61086 [2021-07-13 20:46:34,027 INFO L226 Difference]: Without dead ends: 61086 [2021-07-13 20:46:34,027 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 152.9ms TimeCoverageRelationStatistics Valid=202, Invalid=500, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:46:34,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61086 states. [2021-07-13 20:46:35,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61086 to 48711. [2021-07-13 20:46:35,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48711 states, 48710 states have (on average 3.8803736399096693) internal successors, (189013), 48710 states have internal predecessors, (189013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:35,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48711 states to 48711 states and 189013 transitions. [2021-07-13 20:46:35,816 INFO L78 Accepts]: Start accepts. Automaton has 48711 states and 189013 transitions. Word has length 28 [2021-07-13 20:46:35,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:35,816 INFO L482 AbstractCegarLoop]: Abstraction has 48711 states and 189013 transitions. [2021-07-13 20:46:35,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:35,817 INFO L276 IsEmpty]: Start isEmpty. Operand 48711 states and 189013 transitions. [2021-07-13 20:46:35,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:46:35,917 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:35,917 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:36,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4087 [2021-07-13 20:46:36,125 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:36,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:36,126 INFO L82 PathProgramCache]: Analyzing trace with hash 986257146, now seen corresponding path program 170 times [2021-07-13 20:46:36,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:36,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967071976] [2021-07-13 20:46:36,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:36,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:36,158 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:36,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:36,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967071976] [2021-07-13 20:46:36,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967071976] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:36,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925862800] [2021-07-13 20:46:36,159 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 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 [2021-07-13 20:46:36,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:46:36,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:36,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:46:36,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:36,560 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:36,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925862800] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:36,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:36,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:46:36,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527299532] [2021-07-13 20:46:36,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:46:36,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:36,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:46:36,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:46:36,561 INFO L87 Difference]: Start difference. First operand 48711 states and 189013 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:37,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:37,260 INFO L93 Difference]: Finished difference Result 53676 states and 205772 transitions. [2021-07-13 20:46:37,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:46:37,261 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:46:37,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:37,698 INFO L225 Difference]: With dead ends: 53676 [2021-07-13 20:46:37,698 INFO L226 Difference]: Without dead ends: 53676 [2021-07-13 20:46:37,699 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 234.1ms TimeCoverageRelationStatistics Valid=270, Invalid=722, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:46:37,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53676 states. [2021-07-13 20:46:38,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53676 to 49544. [2021-07-13 20:46:39,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49544 states, 49543 states have (on average 3.878872898290374) internal successors, (192171), 49543 states have internal predecessors, (192171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:39,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49544 states to 49544 states and 192171 transitions. [2021-07-13 20:46:39,245 INFO L78 Accepts]: Start accepts. Automaton has 49544 states and 192171 transitions. Word has length 28 [2021-07-13 20:46:39,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:39,246 INFO L482 AbstractCegarLoop]: Abstraction has 49544 states and 192171 transitions. [2021-07-13 20:46:39,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:39,246 INFO L276 IsEmpty]: Start isEmpty. Operand 49544 states and 192171 transitions. [2021-07-13 20:46:39,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:46:39,343 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:39,343 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:39,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4088 [2021-07-13 20:46:39,557 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:39,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:39,557 INFO L82 PathProgramCache]: Analyzing trace with hash -22913030, now seen corresponding path program 171 times [2021-07-13 20:46:39,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:39,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975920590] [2021-07-13 20:46:39,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:39,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:39,597 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:39,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:39,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975920590] [2021-07-13 20:46:39,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975920590] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:39,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122721060] [2021-07-13 20:46:39,597 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 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 [2021-07-13 20:46:39,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:46:39,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:39,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:46:39,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:39,756 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:39,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122721060] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:39,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:39,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-07-13 20:46:39,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855600061] [2021-07-13 20:46:39,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:46:39,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:39,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:46:39,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:46:39,758 INFO L87 Difference]: Start difference. First operand 49544 states and 192171 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:40,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:40,970 INFO L93 Difference]: Finished difference Result 52408 states and 201958 transitions. [2021-07-13 20:46:40,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:46:40,976 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:46:40,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:41,239 INFO L225 Difference]: With dead ends: 52408 [2021-07-13 20:46:41,239 INFO L226 Difference]: Without dead ends: 52408 [2021-07-13 20:46:41,241 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 298.2ms TimeCoverageRelationStatistics Valid=220, Invalid=710, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:46:41,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52408 states. [2021-07-13 20:46:42,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52408 to 49552. [2021-07-13 20:46:42,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49552 states, 49551 states have (on average 3.8787310044196888) internal successors, (192195), 49551 states have internal predecessors, (192195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:42,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49552 states to 49552 states and 192195 transitions. [2021-07-13 20:46:42,847 INFO L78 Accepts]: Start accepts. Automaton has 49552 states and 192195 transitions. Word has length 28 [2021-07-13 20:46:42,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:42,847 INFO L482 AbstractCegarLoop]: Abstraction has 49552 states and 192195 transitions. [2021-07-13 20:46:42,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:42,847 INFO L276 IsEmpty]: Start isEmpty. Operand 49552 states and 192195 transitions. [2021-07-13 20:46:42,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:46:42,983 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:42,983 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:43,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4089,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:43,197 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:43,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:43,197 INFO L82 PathProgramCache]: Analyzing trace with hash -120181494, now seen corresponding path program 172 times [2021-07-13 20:46:43,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:43,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044363941] [2021-07-13 20:46:43,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:43,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:43,233 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:43,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:43,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044363941] [2021-07-13 20:46:43,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044363941] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:43,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167879396] [2021-07-13 20:46:43,234 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 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 [2021-07-13 20:46:43,269 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:46:43,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:43,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:46:43,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:43,328 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:43,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167879396] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:43,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:43,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 20:46:43,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079092201] [2021-07-13 20:46:43,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:46:43,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:43,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:46:43,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:46:43,329 INFO L87 Difference]: Start difference. First operand 49552 states and 192195 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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) [2021-07-13 20:46:44,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:44,104 INFO L93 Difference]: Finished difference Result 51100 states and 197405 transitions. [2021-07-13 20:46:44,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:46:44,104 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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 28 [2021-07-13 20:46:44,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:44,302 INFO L225 Difference]: With dead ends: 51100 [2021-07-13 20:46:44,302 INFO L226 Difference]: Without dead ends: 51100 [2021-07-13 20:46:44,303 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 130.0ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:46:44,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51100 states. [2021-07-13 20:46:45,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51100 to 49446. [2021-07-13 20:46:45,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49446 states, 49445 states have (on average 3.878471028415411) internal successors, (191771), 49445 states have internal predecessors, (191771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:45,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49446 states to 49446 states and 191771 transitions. [2021-07-13 20:46:45,815 INFO L78 Accepts]: Start accepts. Automaton has 49446 states and 191771 transitions. Word has length 28 [2021-07-13 20:46:45,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:45,815 INFO L482 AbstractCegarLoop]: Abstraction has 49446 states and 191771 transitions. [2021-07-13 20:46:45,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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) [2021-07-13 20:46:45,815 INFO L276 IsEmpty]: Start isEmpty. Operand 49446 states and 191771 transitions. [2021-07-13 20:46:46,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:46:46,196 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:46,196 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:46,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4090,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:46,412 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:46,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:46,413 INFO L82 PathProgramCache]: Analyzing trace with hash -915745990, now seen corresponding path program 173 times [2021-07-13 20:46:46,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:46,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200427498] [2021-07-13 20:46:46,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:46,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:46,651 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2021-07-13 20:46:46,811 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-07-13 20:46:46,965 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2021-07-13 20:46:47,086 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2021-07-13 20:46:47,207 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2021-07-13 20:46:47,324 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 24 [2021-07-13 20:46:47,359 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:47,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:47,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200427498] [2021-07-13 20:46:47,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200427498] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:47,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573754498] [2021-07-13 20:46:47,360 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 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 [2021-07-13 20:46:47,397 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:46:47,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:47,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:46:47,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:47,709 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-07-13 20:46:47,948 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-07-13 20:46:48,186 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-07-13 20:46:48,748 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 100 [2021-07-13 20:46:49,051 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-07-13 20:46:49,271 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-07-13 20:46:49,500 INFO L446 ElimStorePlain]: Different costs {5=[v_prenex_558, A, v_prenex_560, v_prenex_562, v_prenex_564, v_prenex_566], 6=[v_prenex_554, v_prenex_556]} [2021-07-13 20:46:49,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:49,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:46:49,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:49,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:46:49,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2021-07-13 20:46:49,516 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:46:49,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:49,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:46:49,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:49,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:46:49,527 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:46:50,112 WARN L205 SmtUtils]: Spent 584.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 143 [2021-07-13 20:46:50,112 INFO L628 ElimStorePlain]: treesize reduction 280, result has 60.3 percent of original size [2021-07-13 20:46:50,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:50,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:50,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:50,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:46:50,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:46:50,124 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:46:50,323 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-07-13 20:46:50,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:46:50,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:46:50,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:50,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:50,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:46:50,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:46:50,337 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:46:50,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:50,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:50,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:46:50,347 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:46:50,522 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-07-13 20:46:50,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:46:50,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:50,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:50,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:46:50,535 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:46:50,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:46:50,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:50,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:50,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 22 [2021-07-13 20:46:50,545 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:46:50,694 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-07-13 20:46:50,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:46:50,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:46:50,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:50,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:50,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:46:50,704 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:46:50,848 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-07-13 20:46:50,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:46:50,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:50,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:50,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:50,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:46:50,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:46:50,860 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:46:51,000 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-07-13 20:46:51,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:46:51,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:46:51,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:51,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:51,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:51,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:46:51,011 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:46:51,138 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-07-13 20:46:51,138 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:46:51,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:51,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:51,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:51,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-07-13 20:46:51,146 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:46:51,251 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-07-13 20:46:51,251 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:46:51,256 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 11 xjuncts. [2021-07-13 20:46:51,256 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 24 variables, input treesize:757, output treesize:114 [2021-07-13 20:46:51,346 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:51,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573754498] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:51,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:51,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-13 20:46:51,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876743021] [2021-07-13 20:46:51,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:46:51,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:51,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:46:51,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:46:51,347 INFO L87 Difference]: Start difference. First operand 49446 states and 191771 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:51,731 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 44 [2021-07-13 20:46:52,109 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 104 [2021-07-13 20:46:52,659 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 79 [2021-07-13 20:46:52,973 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 66 [2021-07-13 20:46:53,337 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 84 [2021-07-13 20:46:53,912 WARN L205 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 93 [2021-07-13 20:46:54,605 WARN L205 SmtUtils]: Spent 567.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 84 [2021-07-13 20:46:54,872 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 80 [2021-07-13 20:46:55,071 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 74 [2021-07-13 20:46:55,630 WARN L205 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 96 [2021-07-13 20:46:56,124 WARN L205 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 111 [2021-07-13 20:46:56,647 WARN L205 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 112 [2021-07-13 20:46:57,800 WARN L205 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 197 DAG size of output: 153 [2021-07-13 20:46:58,259 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 83 [2021-07-13 20:46:58,686 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 102 [2021-07-13 20:46:59,070 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 84 [2021-07-13 20:46:59,587 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 99 [2021-07-13 20:46:59,975 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 83 [2021-07-13 20:47:00,391 WARN L205 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 56 [2021-07-13 20:47:00,855 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 46 [2021-07-13 20:47:01,040 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 42 [2021-07-13 20:47:01,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:01,306 INFO L93 Difference]: Finished difference Result 57718 states and 215952 transitions. [2021-07-13 20:47:01,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:47:01,307 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:47:01,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:01,528 INFO L225 Difference]: With dead ends: 57718 [2021-07-13 20:47:01,528 INFO L226 Difference]: Without dead ends: 57628 [2021-07-13 20:47:01,528 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 11036.7ms TimeCoverageRelationStatistics Valid=458, Invalid=1992, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:47:01,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57628 states. [2021-07-13 20:47:02,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57628 to 49581. [2021-07-13 20:47:02,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49581 states, 49580 states have (on average 3.8776926179911255) internal successors, (192256), 49580 states have internal predecessors, (192256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:03,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49581 states to 49581 states and 192256 transitions. [2021-07-13 20:47:03,136 INFO L78 Accepts]: Start accepts. Automaton has 49581 states and 192256 transitions. Word has length 30 [2021-07-13 20:47:03,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:03,136 INFO L482 AbstractCegarLoop]: Abstraction has 49581 states and 192256 transitions. [2021-07-13 20:47:03,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:03,136 INFO L276 IsEmpty]: Start isEmpty. Operand 49581 states and 192256 transitions. [2021-07-13 20:47:03,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:47:03,235 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:03,235 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:47:03,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4091,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:03,442 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:03,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:03,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1350823290, now seen corresponding path program 174 times [2021-07-13 20:47:03,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:03,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818190956] [2021-07-13 20:47:03,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:03,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:03,744 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 65 [2021-07-13 20:47:03,910 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-07-13 20:47:04,075 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2021-07-13 20:47:04,189 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-07-13 20:47:04,510 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-07-13 20:47:04,616 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:04,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:04,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818190956] [2021-07-13 20:47:04,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818190956] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:04,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774856755] [2021-07-13 20:47:04,616 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 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 [2021-07-13 20:47:04,647 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:47:04,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:04,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:47:04,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:05,022 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-07-13 20:47:05,257 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-07-13 20:47:05,926 WARN L205 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 97 [2021-07-13 20:47:06,149 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-07-13 20:47:06,837 WARN L205 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 131 [2021-07-13 20:47:06,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:06,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:06,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:06,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:47:06,933 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:07,359 WARN L205 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 155 [2021-07-13 20:47:07,360 INFO L628 ElimStorePlain]: treesize reduction 86, result has 82.7 percent of original size [2021-07-13 20:47:07,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:07,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:07,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:07,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 22 [2021-07-13 20:47:07,370 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:07,555 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2021-07-13 20:47:07,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:47:07,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:07,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:07,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:07,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:07,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:47:07,568 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:07,738 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-07-13 20:47:07,739 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:47:07,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:07,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:07,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:07,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:47:07,749 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:07,914 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-07-13 20:47:07,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:47:07,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:07,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:07,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-07-13 20:47:07,925 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:08,076 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-07-13 20:47:08,076 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:47:08,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:08,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:08,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:47:08,086 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:08,228 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-07-13 20:47:08,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:47:08,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:08,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:08,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:08,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:47:08,237 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:08,370 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-07-13 20:47:08,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:47:08,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:08,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:08,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:08,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:47:08,379 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:08,503 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-07-13 20:47:08,503 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:47:08,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:08,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:08,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:08,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:08,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-07-13 20:47:08,516 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:08,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:08,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:08,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:08,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:47:08,525 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:08,632 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-07-13 20:47:08,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:47:08,638 INFO L550 ElimStorePlain]: Start of recursive call 1: 18 dim-0 vars, 9 dim-1 vars, End of recursive call: and 11 xjuncts. [2021-07-13 20:47:08,638 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 27 variables, input treesize:525, output treesize:114 [2021-07-13 20:47:08,743 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:08,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774856755] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:08,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:08,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-13 20:47:08,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330296127] [2021-07-13 20:47:08,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:47:08,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:08,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:47:08,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:47:08,744 INFO L87 Difference]: Start difference. First operand 49581 states and 192256 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:08,969 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 32 [2021-07-13 20:47:09,208 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 44 [2021-07-13 20:47:09,736 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2021-07-13 20:47:10,041 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 70 [2021-07-13 20:47:10,315 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 50 [2021-07-13 20:47:11,227 WARN L205 SmtUtils]: Spent 645.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 89 [2021-07-13 20:47:11,978 WARN L205 SmtUtils]: Spent 679.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 73 [2021-07-13 20:47:12,141 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-07-13 20:47:13,005 WARN L205 SmtUtils]: Spent 764.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 93 [2021-07-13 20:47:13,385 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-07-13 20:47:13,909 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 102 [2021-07-13 20:47:14,146 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2021-07-13 20:47:14,477 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2021-07-13 20:47:14,833 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 42 [2021-07-13 20:47:15,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:15,205 INFO L93 Difference]: Finished difference Result 52816 states and 201749 transitions. [2021-07-13 20:47:15,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:47:15,206 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:47:15,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:15,394 INFO L225 Difference]: With dead ends: 52816 [2021-07-13 20:47:15,394 INFO L226 Difference]: Without dead ends: 52771 [2021-07-13 20:47:15,394 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 8136.4ms TimeCoverageRelationStatistics Valid=322, Invalid=1748, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:47:15,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52771 states. [2021-07-13 20:47:16,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52771 to 49618. [2021-07-13 20:47:16,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49618 states, 49617 states have (on average 3.877360582058569) internal successors, (192383), 49617 states have internal predecessors, (192383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:16,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49618 states to 49618 states and 192383 transitions. [2021-07-13 20:47:16,784 INFO L78 Accepts]: Start accepts. Automaton has 49618 states and 192383 transitions. Word has length 30 [2021-07-13 20:47:16,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:16,784 INFO L482 AbstractCegarLoop]: Abstraction has 49618 states and 192383 transitions. [2021-07-13 20:47:16,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:16,784 INFO L276 IsEmpty]: Start isEmpty. Operand 49618 states and 192383 transitions. [2021-07-13 20:47:16,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:47:16,881 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:16,881 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:47:17,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4132 [2021-07-13 20:47:17,098 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:17,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:17,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1352714698, now seen corresponding path program 175 times [2021-07-13 20:47:17,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:17,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247467365] [2021-07-13 20:47:17,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:17,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:17,813 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 53 [2021-07-13 20:47:18,097 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 60 [2021-07-13 20:47:18,675 WARN L205 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 79 [2021-07-13 20:47:18,930 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 45 [2021-07-13 20:47:19,060 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:19,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:19,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247467365] [2021-07-13 20:47:19,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247467365] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:19,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851940119] [2021-07-13 20:47:19,060 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 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 [2021-07-13 20:47:19,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:19,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 20:47:19,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:20,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 22 [2021-07-13 20:47:20,264 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:20,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 22 [2021-07-13 20:47:20,277 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:20,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 25 [2021-07-13 20:47:20,291 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:20,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 28 [2021-07-13 20:47:20,305 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:20,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 22 [2021-07-13 20:47:20,319 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:20,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 25 [2021-07-13 20:47:20,334 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:20,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-07-13 20:47:20,348 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:20,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 22 [2021-07-13 20:47:20,363 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:20,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-07-13 20:47:20,378 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:20,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 22 [2021-07-13 20:47:20,392 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:20,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-07-13 20:47:20,407 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:20,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 22 [2021-07-13 20:47:20,423 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:20,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-07-13 20:47:20,437 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:20,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-07-13 20:47:20,452 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:20,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 28 [2021-07-13 20:47:20,468 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:20,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 22 [2021-07-13 20:47:20,483 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:20,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 16 [2021-07-13 20:47:20,498 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:20,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 22 [2021-07-13 20:47:20,512 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:20,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-07-13 20:47:20,527 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:20,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 16 [2021-07-13 20:47:20,541 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:20,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 25 [2021-07-13 20:47:20,556 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:20,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 22 [2021-07-13 20:47:20,571 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:20,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 16 [2021-07-13 20:47:20,588 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:20,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 19 [2021-07-13 20:47:20,602 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:20,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 25 [2021-07-13 20:47:20,617 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:20,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 22 [2021-07-13 20:47:20,632 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:20,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-07-13 20:47:20,649 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:20,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 16 [2021-07-13 20:47:20,665 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:20,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 22 [2021-07-13 20:47:20,680 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:20,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 22 [2021-07-13 20:47:20,695 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:20,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 16 [2021-07-13 20:47:20,708 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:20,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 22 [2021-07-13 20:47:20,723 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:20,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 25 [2021-07-13 20:47:20,738 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:20,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-13 20:47:20,753 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:20,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:47:20,767 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:20,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 22 [2021-07-13 20:47:20,783 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:20,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 22 [2021-07-13 20:47:20,799 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:20,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 22 [2021-07-13 20:47:20,817 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:20,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 22 [2021-07-13 20:47:20,836 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:20,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 25 [2021-07-13 20:47:20,854 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:20,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-07-13 20:47:20,872 INFO L550 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:20,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-07-13 20:47:20,890 INFO L550 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:20,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-07-13 20:47:20,908 INFO L550 ElimStorePlain]: Start of recursive call 44: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:20,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 25 [2021-07-13 20:47:20,925 INFO L550 ElimStorePlain]: Start of recursive call 45: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:20,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 25 [2021-07-13 20:47:20,942 INFO L550 ElimStorePlain]: Start of recursive call 46: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:20,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-07-13 20:47:20,960 INFO L550 ElimStorePlain]: Start of recursive call 47: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:20,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 25 [2021-07-13 20:47:20,978 INFO L550 ElimStorePlain]: Start of recursive call 48: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:20,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:20,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:20,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 22 [2021-07-13 20:47:20,996 INFO L550 ElimStorePlain]: Start of recursive call 49: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:21,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:21,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:21,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:21,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:21,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:21,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:21,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:21,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:21,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2021-07-13 20:47:21,014 INFO L550 ElimStorePlain]: Start of recursive call 50: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:21,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:21,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:21,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:21,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:21,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:21,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:21,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:21,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:21,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-07-13 20:47:21,030 INFO L550 ElimStorePlain]: Start of recursive call 51: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:21,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:21,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:21,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:21,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:21,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:21,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:21,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:21,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:21,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:47:21,047 INFO L550 ElimStorePlain]: Start of recursive call 52: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:21,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:21,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:21,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:21,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:21,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:21,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:21,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:21,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:21,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 22 [2021-07-13 20:47:21,064 INFO L550 ElimStorePlain]: Start of recursive call 53: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:21,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:21,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:21,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:21,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:21,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:21,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:21,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:21,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:21,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 25 [2021-07-13 20:47:21,080 INFO L550 ElimStorePlain]: Start of recursive call 54: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:21,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:21,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:21,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:21,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:21,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:21,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:21,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:21,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:21,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-07-13 20:47:21,097 INFO L550 ElimStorePlain]: Start of recursive call 55: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:21,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:21,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:21,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:21,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:21,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:21,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:21,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:21,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:21,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 22 [2021-07-13 20:47:21,113 INFO L550 ElimStorePlain]: Start of recursive call 56: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:21,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:21,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:21,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:21,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:21,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:21,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:21,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:21,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:21,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-07-13 20:47:21,130 INFO L550 ElimStorePlain]: Start of recursive call 57: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:21,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:21,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:21,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:21,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:21,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:21,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:21,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:21,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:21,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-07-13 20:47:21,146 INFO L550 ElimStorePlain]: Start of recursive call 58: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:21,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:21,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:21,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:21,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:21,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:21,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:21,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:21,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:21,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-07-13 20:47:21,161 INFO L550 ElimStorePlain]: Start of recursive call 59: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:21,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:21,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:21,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:21,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:21,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:21,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:21,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:21,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:21,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 22 [2021-07-13 20:47:21,177 INFO L550 ElimStorePlain]: Start of recursive call 60: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:21,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:21,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:21,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:21,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:21,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:21,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:21,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:21,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:21,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-07-13 20:47:21,192 INFO L550 ElimStorePlain]: Start of recursive call 61: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:21,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:21,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:21,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:21,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:21,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:21,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:21,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:21,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:21,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 25 [2021-07-13 20:47:21,207 INFO L550 ElimStorePlain]: Start of recursive call 62: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:21,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:21,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:21,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:21,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:21,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:21,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:21,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:21,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:21,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2021-07-13 20:47:21,220 INFO L550 ElimStorePlain]: Start of recursive call 63: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:21,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:21,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:21,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:21,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:21,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:21,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:21,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-13 20:47:21,228 INFO L550 ElimStorePlain]: Start of recursive call 64: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:21,334 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 25 [2021-07-13 20:47:21,334 INFO L628 ElimStorePlain]: treesize reduction 179, result has 29.5 percent of original size [2021-07-13 20:47:21,336 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:47:21,336 INFO L247 ElimStorePlain]: Needed 64 recursive calls to eliminate 2 variables, input treesize:3472, output treesize:51 [2021-07-13 20:47:21,400 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:21,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851940119] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:21,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:21,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-13 20:47:21,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562849792] [2021-07-13 20:47:21,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:47:21,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:21,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:47:21,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:47:21,401 INFO L87 Difference]: Start difference. First operand 49618 states and 192383 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:22,705 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 81 [2021-07-13 20:47:23,140 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 73 [2021-07-13 20:47:23,292 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 53 [2021-07-13 20:47:23,654 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 80 [2021-07-13 20:47:24,415 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 81 [2021-07-13 20:47:24,940 WARN L205 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 106 [2021-07-13 20:47:25,267 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 89 [2021-07-13 20:47:25,477 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-07-13 20:47:25,762 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 85 [2021-07-13 20:47:25,962 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 57 [2021-07-13 20:47:26,353 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 81 [2021-07-13 20:47:26,534 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 72 [2021-07-13 20:47:26,992 WARN L205 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 88 [2021-07-13 20:47:27,251 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 70 [2021-07-13 20:47:27,638 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 84 [2021-07-13 20:47:27,912 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 84 [2021-07-13 20:47:28,378 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 99 [2021-07-13 20:47:28,656 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-07-13 20:47:28,865 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 66 [2021-07-13 20:47:29,220 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-07-13 20:47:29,603 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 85 [2021-07-13 20:47:29,802 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 76 [2021-07-13 20:47:30,223 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 86 [2021-07-13 20:47:30,477 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 70 [2021-07-13 20:47:30,807 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 100 [2021-07-13 20:47:31,102 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 77 [2021-07-13 20:47:31,361 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2021-07-13 20:47:31,628 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 83 [2021-07-13 20:47:32,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:32,032 INFO L93 Difference]: Finished difference Result 70379 states and 263440 transitions. [2021-07-13 20:47:32,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-13 20:47:32,033 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:47:32,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:32,305 INFO L225 Difference]: With dead ends: 70379 [2021-07-13 20:47:32,305 INFO L226 Difference]: Without dead ends: 70349 [2021-07-13 20:47:32,305 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1168 ImplicationChecksByTransitivity, 11175.7ms TimeCoverageRelationStatistics Valid=537, Invalid=3623, Unknown=0, NotChecked=0, Total=4160 [2021-07-13 20:47:32,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70349 states. [2021-07-13 20:47:33,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70349 to 49657. [2021-07-13 20:47:33,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49657 states, 49656 states have (on average 3.877094409537619) internal successors, (192521), 49656 states have internal predecessors, (192521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:34,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49657 states to 49657 states and 192521 transitions. [2021-07-13 20:47:34,072 INFO L78 Accepts]: Start accepts. Automaton has 49657 states and 192521 transitions. Word has length 30 [2021-07-13 20:47:34,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:34,072 INFO L482 AbstractCegarLoop]: Abstraction has 49657 states and 192521 transitions. [2021-07-13 20:47:34,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:34,072 INFO L276 IsEmpty]: Start isEmpty. Operand 49657 states and 192521 transitions. [2021-07-13 20:47:34,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:47:34,183 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:34,183 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:47:34,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4169,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:34,387 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:34,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:34,387 INFO L82 PathProgramCache]: Analyzing trace with hash -547667522, now seen corresponding path program 176 times [2021-07-13 20:47:34,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:34,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852467764] [2021-07-13 20:47:34,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:34,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:34,633 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 64 [2021-07-13 20:47:34,838 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 73 [2021-07-13 20:47:35,037 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2021-07-13 20:47:35,169 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2021-07-13 20:47:35,341 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:35,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:35,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852467764] [2021-07-13 20:47:35,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852467764] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:35,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006170231] [2021-07-13 20:47:35,341 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 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 [2021-07-13 20:47:35,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:47:35,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:35,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:47:35,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:35,664 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-07-13 20:47:35,975 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-07-13 20:47:36,178 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-07-13 20:47:36,828 WARN L205 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 106 [2021-07-13 20:47:37,373 WARN L205 SmtUtils]: Spent 395.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-07-13 20:47:37,726 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:47:37,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 62 [2021-07-13 20:47:37,745 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:38,685 WARN L205 SmtUtils]: Spent 939.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 338 [2021-07-13 20:47:38,685 INFO L628 ElimStorePlain]: treesize reduction 28, result has 96.9 percent of original size [2021-07-13 20:47:38,737 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:47:38,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 53 [2021-07-13 20:47:38,755 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:39,166 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification that was a NOOP. DAG size: 327 [2021-07-13 20:47:39,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:47:39,227 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-07-13 20:47:39,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 43 [2021-07-13 20:47:39,230 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:39,648 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification that was a NOOP. DAG size: 326 [2021-07-13 20:47:39,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:47:39,709 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-07-13 20:47:39,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 43 [2021-07-13 20:47:39,713 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:40,138 WARN L205 SmtUtils]: Spent 424.00 ms on a formula simplification that was a NOOP. DAG size: 323 [2021-07-13 20:47:40,138 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:47:40,198 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-07-13 20:47:40,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 50 [2021-07-13 20:47:40,200 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:40,595 WARN L205 SmtUtils]: Spent 395.00 ms on a formula simplification that was a NOOP. DAG size: 324 [2021-07-13 20:47:40,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:47:40,655 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-07-13 20:47:40,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 31 treesize of output 43 [2021-07-13 20:47:40,657 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:41,061 WARN L205 SmtUtils]: Spent 403.00 ms on a formula simplification that was a NOOP. DAG size: 325 [2021-07-13 20:47:41,061 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:47:41,125 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-07-13 20:47:41,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 54 [2021-07-13 20:47:41,128 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:41,562 WARN L205 SmtUtils]: Spent 433.00 ms on a formula simplification that was a NOOP. DAG size: 327 [2021-07-13 20:47:41,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:47:41,634 INFO L354 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2021-07-13 20:47:41,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 55 [2021-07-13 20:47:41,655 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:42,520 WARN L205 SmtUtils]: Spent 864.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 318 [2021-07-13 20:47:42,521 INFO L628 ElimStorePlain]: treesize reduction 9, result has 98.9 percent of original size [2021-07-13 20:47:42,594 INFO L354 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2021-07-13 20:47:42,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 58 [2021-07-13 20:47:42,614 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:43,490 WARN L205 SmtUtils]: Spent 875.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 315 [2021-07-13 20:47:43,491 INFO L628 ElimStorePlain]: treesize reduction 24, result has 97.1 percent of original size [2021-07-13 20:47:43,558 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-07-13 20:47:43,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 51 [2021-07-13 20:47:43,568 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:44,423 WARN L205 SmtUtils]: Spent 854.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 309 [2021-07-13 20:47:44,424 INFO L628 ElimStorePlain]: treesize reduction 32, result has 96.1 percent of original size [2021-07-13 20:47:44,490 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-07-13 20:47:44,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 54 [2021-07-13 20:47:44,493 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:44,925 WARN L205 SmtUtils]: Spent 431.00 ms on a formula simplification that was a NOOP. DAG size: 310 [2021-07-13 20:47:44,925 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:47:44,994 INFO L354 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2021-07-13 20:47:44,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 55 [2021-07-13 20:47:45,014 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:45,859 WARN L205 SmtUtils]: Spent 844.00 ms on a formula simplification. DAG size of input: 306 DAG size of output: 301 [2021-07-13 20:47:45,859 INFO L628 ElimStorePlain]: treesize reduction 9, result has 98.8 percent of original size [2021-07-13 20:47:45,912 INFO L354 Elim1Store]: treesize reduction 20, result has 51.2 percent of original size [2021-07-13 20:47:45,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 39 [2021-07-13 20:47:45,914 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:46,330 WARN L205 SmtUtils]: Spent 415.00 ms on a formula simplification that was a NOOP. DAG size: 300 [2021-07-13 20:47:46,331 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:47:46,380 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:47:46,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 62 [2021-07-13 20:47:46,392 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:47,146 WARN L205 SmtUtils]: Spent 753.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 297 [2021-07-13 20:47:47,147 INFO L628 ElimStorePlain]: treesize reduction 25, result has 96.8 percent of original size [2021-07-13 20:47:47,205 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-07-13 20:47:47,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 44 [2021-07-13 20:47:47,211 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:47,622 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification that was a NOOP. DAG size: 293 [2021-07-13 20:47:47,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:47:47,680 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-07-13 20:47:47,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 44 [2021-07-13 20:47:47,685 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:48,091 WARN L205 SmtUtils]: Spent 405.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2021-07-13 20:47:48,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:47:48,193 INFO L550 ElimStorePlain]: Start of recursive call 1: 32 dim-0 vars, 16 dim-1 vars, End of recursive call: and 16 xjuncts. [2021-07-13 20:47:48,193 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 48 variables, input treesize:877, output treesize:1238 [2021-07-13 20:47:48,808 WARN L205 SmtUtils]: Spent 518.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 48 [2021-07-13 20:47:48,933 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:48,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006170231] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:48,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:48,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-07-13 20:47:48,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156679330] [2021-07-13 20:47:48,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:47:48,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:48,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:47:48,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:47:48,934 INFO L87 Difference]: Start difference. First operand 49657 states and 192521 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:49,147 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 36 [2021-07-13 20:47:49,537 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 47 [2021-07-13 20:47:50,183 WARN L205 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 86 [2021-07-13 20:47:50,627 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 62 [2021-07-13 20:47:50,829 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 62 [2021-07-13 20:47:51,195 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 55 [2021-07-13 20:47:51,536 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 57 [2021-07-13 20:47:51,839 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 55 [2021-07-13 20:47:52,282 WARN L205 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 71 [2021-07-13 20:47:52,784 WARN L205 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 89 [2021-07-13 20:47:53,116 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 56 [2021-07-13 20:47:53,298 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2021-07-13 20:47:53,513 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 58 [2021-07-13 20:47:54,411 WARN L205 SmtUtils]: Spent 754.00 ms on a formula simplification. DAG size of input: 199 DAG size of output: 113 [2021-07-13 20:47:55,214 WARN L205 SmtUtils]: Spent 666.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 76 [2021-07-13 20:47:55,658 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 89 [2021-07-13 20:47:56,692 WARN L205 SmtUtils]: Spent 809.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 103 [2021-07-13 20:47:57,156 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2021-07-13 20:47:57,973 WARN L205 SmtUtils]: Spent 722.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 153 [2021-07-13 20:47:58,227 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 74 [2021-07-13 20:47:58,640 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 63 [2021-07-13 20:47:59,628 WARN L205 SmtUtils]: Spent 920.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 157 [2021-07-13 20:48:00,485 WARN L205 SmtUtils]: Spent 784.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 141 [2021-07-13 20:48:01,205 WARN L205 SmtUtils]: Spent 594.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 97 [2021-07-13 20:48:01,623 WARN L205 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 83 [2021-07-13 20:48:02,559 WARN L205 SmtUtils]: Spent 823.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 138 [2021-07-13 20:48:03,201 WARN L205 SmtUtils]: Spent 563.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 83 [2021-07-13 20:48:04,158 WARN L205 SmtUtils]: Spent 835.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 120 [2021-07-13 20:48:05,841 WARN L205 SmtUtils]: Spent 1.60 s on a formula simplification. DAG size of input: 215 DAG size of output: 160 [2021-07-13 20:48:06,050 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-07-13 20:48:06,275 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 35 [2021-07-13 20:48:06,839 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 59 [2021-07-13 20:48:07,333 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 58 [2021-07-13 20:48:07,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:07,679 INFO L93 Difference]: Finished difference Result 63922 states and 240994 transitions. [2021-07-13 20:48:07,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-13 20:48:07,680 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:48:07,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:07,915 INFO L225 Difference]: With dead ends: 63922 [2021-07-13 20:48:07,916 INFO L226 Difference]: Without dead ends: 63892 [2021-07-13 20:48:07,916 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1197 ImplicationChecksByTransitivity, 19961.5ms TimeCoverageRelationStatistics Valid=636, Invalid=3524, Unknown=0, NotChecked=0, Total=4160 [2021-07-13 20:48:07,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63892 states. [2021-07-13 20:48:09,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63892 to 49681. [2021-07-13 20:48:09,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49681 states, 49680 states have (on average 3.8768719806763285) internal successors, (192603), 49680 states have internal predecessors, (192603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:09,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49681 states to 49681 states and 192603 transitions. [2021-07-13 20:48:09,643 INFO L78 Accepts]: Start accepts. Automaton has 49681 states and 192603 transitions. Word has length 30 [2021-07-13 20:48:09,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:09,643 INFO L482 AbstractCegarLoop]: Abstraction has 49681 states and 192603 transitions. [2021-07-13 20:48:09,643 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:09,643 INFO L276 IsEmpty]: Start isEmpty. Operand 49681 states and 192603 transitions. [2021-07-13 20:48:09,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:48:09,752 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:09,752 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:09,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4430 [2021-07-13 20:48:09,965 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:09,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:09,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1002714042, now seen corresponding path program 177 times [2021-07-13 20:48:09,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:09,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705323788] [2021-07-13 20:48:09,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:09,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:10,807 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 60 [2021-07-13 20:48:11,062 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 66 [2021-07-13 20:48:11,419 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 82 [2021-07-13 20:48:11,600 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2021-07-13 20:48:11,797 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:11,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:11,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705323788] [2021-07-13 20:48:11,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705323788] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:11,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113463167] [2021-07-13 20:48:11,798 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 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 [2021-07-13 20:48:11,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:48:11,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:11,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 20:48:11,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:12,215 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-07-13 20:48:12,434 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-07-13 20:48:12,733 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-07-13 20:48:13,216 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 106 [2021-07-13 20:48:13,716 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-07-13 20:48:14,280 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 301 DAG size of output: 185 [2021-07-13 20:48:14,717 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2021-07-13 20:48:15,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:48:15,061 INFO L354 Elim1Store]: treesize reduction 4, result has 91.5 percent of original size [2021-07-13 20:48:15,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 64 [2021-07-13 20:48:15,070 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:48:15,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:48:15,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:48:15,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:48:15,152 INFO L354 Elim1Store]: treesize reduction 12, result has 74.5 percent of original size [2021-07-13 20:48:15,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 46 treesize of output 56 [2021-07-13 20:48:15,154 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:48:15,229 INFO L354 Elim1Store]: treesize reduction 16, result has 66.0 percent of original size [2021-07-13 20:48:15,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 49 [2021-07-13 20:48:15,231 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:48:15,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:48:15,303 INFO L354 Elim1Store]: treesize reduction 12, result has 76.5 percent of original size [2021-07-13 20:48:15,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 32 treesize of output 54 [2021-07-13 20:48:15,322 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:48:15,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:48:15,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:48:15,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:48:15,411 INFO L354 Elim1Store]: treesize reduction 4, result has 91.5 percent of original size [2021-07-13 20:48:15,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 46 treesize of output 64 [2021-07-13 20:48:15,419 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:48:15,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:48:15,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:48:15,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:48:15,500 INFO L354 Elim1Store]: treesize reduction 12, result has 74.5 percent of original size [2021-07-13 20:48:15,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 51 treesize of output 59 [2021-07-13 20:48:15,504 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:48:15,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:48:15,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:48:15,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:48:15,579 INFO L354 Elim1Store]: treesize reduction 16, result has 66.0 percent of original size [2021-07-13 20:48:15,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 51 treesize of output 55 [2021-07-13 20:48:15,581 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:48:15,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:48:15,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:48:15,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:48:15,664 INFO L354 Elim1Store]: treesize reduction 16, result has 66.0 percent of original size [2021-07-13 20:48:15,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 39 treesize of output 49 [2021-07-13 20:48:15,666 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:48:15,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:48:15,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:48:15,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:48:15,757 INFO L354 Elim1Store]: treesize reduction 12, result has 74.5 percent of original size [2021-07-13 20:48:15,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 39 treesize of output 53 [2021-07-13 20:48:15,763 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:48:15,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:48:15,839 INFO L354 Elim1Store]: treesize reduction 12, result has 74.5 percent of original size [2021-07-13 20:48:15,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 56 [2021-07-13 20:48:15,841 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:48:17,735 WARN L205 SmtUtils]: Spent 1.89 s on a formula simplification. DAG size of input: 354 DAG size of output: 326 [2021-07-13 20:48:17,736 INFO L628 ElimStorePlain]: treesize reduction 97, result has 91.9 percent of original size [2021-07-13 20:48:17,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:48:17,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:48:17,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:48:17,800 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:17,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 42 treesize of output 68 [2021-07-13 20:48:17,814 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:48:17,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:48:17,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:48:17,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:48:17,879 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:17,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 42 treesize of output 68 [2021-07-13 20:48:17,895 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:48:17,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:48:17,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:48:17,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:48:17,969 INFO L354 Elim1Store]: treesize reduction 12, result has 74.5 percent of original size [2021-07-13 20:48:17,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 35 treesize of output 53 [2021-07-13 20:48:17,975 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:48:18,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:48:18,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:48:18,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:48:18,060 INFO L354 Elim1Store]: treesize reduction 12, result has 74.5 percent of original size [2021-07-13 20:48:18,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 42 treesize of output 56 [2021-07-13 20:48:18,064 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:48:18,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:48:18,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:48:18,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:48:18,169 INFO L354 Elim1Store]: treesize reduction 12, result has 74.5 percent of original size [2021-07-13 20:48:18,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 42 treesize of output 56 [2021-07-13 20:48:18,173 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:48:18,245 INFO L354 Elim1Store]: treesize reduction 12, result has 74.5 percent of original size [2021-07-13 20:48:18,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 50 [2021-07-13 20:48:18,254 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:48:18,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:48:18,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:48:18,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:48:18,310 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:18,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 35 treesize of output 65 [2021-07-13 20:48:18,334 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-13 20:48:18,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:48:18,397 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:18,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 25 treesize of output 63 [2021-07-13 20:48:18,420 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-13 20:48:18,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:48:18,489 INFO L354 Elim1Store]: treesize reduction 16, result has 66.0 percent of original size [2021-07-13 20:48:18,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 49 [2021-07-13 20:48:18,493 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-13 20:48:18,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:48:18,558 INFO L354 Elim1Store]: treesize reduction 4, result has 91.5 percent of original size [2021-07-13 20:48:18,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 61 [2021-07-13 20:48:18,576 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-13 20:48:19,555 WARN L205 SmtUtils]: Spent 978.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 294 [2021-07-13 20:48:19,556 INFO L628 ElimStorePlain]: treesize reduction 250, result has 78.3 percent of original size [2021-07-13 20:48:19,633 INFO L550 ElimStorePlain]: Start of recursive call 1: 36 dim-0 vars, 2 dim-1 vars, End of recursive call: and 20 xjuncts. [2021-07-13 20:48:19,633 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 38 variables, input treesize:1193, output treesize:1265 [2021-07-13 20:48:20,238 WARN L205 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 61 [2021-07-13 20:48:20,323 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:20,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113463167] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:20,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:20,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 26 [2021-07-13 20:48:20,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614654813] [2021-07-13 20:48:20,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:48:20,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:20,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:48:20,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:48:20,324 INFO L87 Difference]: Start difference. First operand 49681 states and 192603 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:21,564 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 44 [2021-07-13 20:48:21,922 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 52 [2021-07-13 20:48:22,077 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 48 [2021-07-13 20:48:22,943 WARN L205 SmtUtils]: Spent 598.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 94 [2021-07-13 20:48:23,756 WARN L205 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 73 [2021-07-13 20:48:24,073 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 50 [2021-07-13 20:48:25,013 WARN L205 SmtUtils]: Spent 859.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 91 [2021-07-13 20:48:25,709 WARN L205 SmtUtils]: Spent 620.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 141 [2021-07-13 20:48:25,958 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 48 [2021-07-13 20:48:26,105 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 55 [2021-07-13 20:48:26,266 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 53 [2021-07-13 20:48:27,163 WARN L205 SmtUtils]: Spent 691.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 105 [2021-07-13 20:48:27,447 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-07-13 20:48:28,161 WARN L205 SmtUtils]: Spent 631.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 97 [2021-07-13 20:48:28,570 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 54 [2021-07-13 20:48:29,746 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 177 DAG size of output: 102 Received shutdown request... [2021-07-13 20:48:30,272 WARN L222 SmtUtils]: Removed 8 from assertion stack [2021-07-13 20:48:30,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 20:48:30,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4572,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:30,473 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-13 20:48:30,475 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-13 20:48:30,476 WARN L196 ceAbstractionStarter]: Timeout [2021-07-13 20:48:30,476 INFO L202 PluginConnector]: Adding new model max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 08:48:30 BasicIcfg [2021-07-13 20:48:30,476 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-13 20:48:30,477 INFO L168 Benchmark]: Toolchain (without parser) took 861415.51 ms. Allocated memory was 174.1 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 152.6 MB in the beginning and 5.6 GB in the end (delta: -5.5 GB). Peak memory consumption was 2.3 GB. Max. memory is 8.0 GB. [2021-07-13 20:48:30,477 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 174.1 MB. Free memory is still 153.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 20:48:30,477 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.67 ms. Allocated memory is still 174.1 MB. Free memory was 152.5 MB in the beginning and 151.1 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 20:48:30,477 INFO L168 Benchmark]: Boogie Preprocessor took 15.11 ms. Allocated memory is still 174.1 MB. Free memory was 151.1 MB in the beginning and 150.0 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-07-13 20:48:30,477 INFO L168 Benchmark]: RCFGBuilder took 292.83 ms. Allocated memory is still 174.1 MB. Free memory was 149.9 MB in the beginning and 137.1 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-07-13 20:48:30,477 INFO L168 Benchmark]: TraceAbstraction took 861081.12 ms. Allocated memory was 174.1 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 136.6 MB in the beginning and 5.6 GB in the end (delta: -5.5 GB). Peak memory consumption was 2.3 GB. Max. memory is 8.0 GB. [2021-07-13 20:48:30,477 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 0.11 ms. Allocated memory is still 174.1 MB. Free memory is still 153.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 21.67 ms. Allocated memory is still 174.1 MB. Free memory was 152.5 MB in the beginning and 151.1 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Preprocessor took 15.11 ms. Allocated memory is still 174.1 MB. Free memory was 151.1 MB in the beginning and 150.0 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 292.83 ms. Allocated memory is still 174.1 MB. Free memory was 149.9 MB in the beginning and 137.1 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 861081.12 ms. Allocated memory was 174.1 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 136.6 MB in the beginning and 5.6 GB in the end (delta: -5.5 GB). Peak memory consumption was 2.3 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 66]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (49681states) and FLOYD_HOARE automaton (currently 37 states, 26 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 221 for 446ms.. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 42 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 861020.3ms, OverallIterations: 262, TraceHistogramMax: 3, EmptinessCheckTime: 9354.9ms, AutomataDifference: 443251.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 43.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 11634 SDtfs, 74630 SDslu, 89240 SDs, 0 SdLazy, 143462 SolverSat, 13543 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 80648.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16853 GetRequests, 5516 SyntacticMatches, 247 SemanticMatches, 11089 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186954 ImplicationChecksByTransitivity, 387532.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=55127occurred in iteration=253, InterpolantAutomatonStates: 9787, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 121218.2ms AutomataMinimizationTime, 261 MinimizatonAttempts, 1352440 StatesRemovedByMinimization, 261 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1097.2ms SsaConstructionTime, 3033.1ms SatisfiabilityAnalysisTime, 221816.7ms InterpolantComputationTime, 13926 NumberOfCodeBlocks, 13926 NumberOfCodeBlocksAsserted, 906 NumberOfCheckSat, 13405 ConstructedInterpolants, 189 QuantifiedInterpolants, 281930 SizeOfPredicates, 1160 NumberOfNonLiveVariables, 18112 ConjunctsInSsa, 3926 ConjunctsInUnsatCore, 521 InterpolantComputations, 3 PerfectInterpolantSequences, 1026/4434 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