/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/mts-array.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 20:38:02,757 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 20:38:02,759 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 20:38:02,817 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-13 20:38:02,880 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 20:38:02,922 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 20:38:02,922 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 20:38:02,923 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 20:38:02,923 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 20:38:02,924 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 20:38:02,924 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 20:38:02,925 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 20:38:02,925 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 20:38:02,925 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 20:38:02,925 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 20:38:02,926 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 20:38:02,926 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 20:38:02,926 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 20:38:02,926 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 20:38:02,926 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 20:38:02,926 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 20:38:02,926 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 20:38:02,926 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 20:38:02,926 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 20:38:02,926 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 20:38:02,927 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 20:38:02,927 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 20:38:02,927 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 20:38:02,927 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 20:38:02,927 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 20:38:02,927 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 20:38:02,927 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 20:38:02,927 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 20:38:02,927 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 20:38:02,927 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 20:38:02,928 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 20:38:02,928 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 20:38:03,203 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 20:38:03,215 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 20:38:03,216 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 20:38:03,217 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-13 20:38:03,233 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-13 20:38:03,234 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/mts-array.wvr.bpl [2021-07-13 20:38:03,234 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/mts-array.wvr.bpl' [2021-07-13 20:38:03,254 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 20:38:03,255 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-13 20:38:03,256 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 20:38:03,257 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 20:38:03,257 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 20:38:03,265 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:38:03" (1/1) ... [2021-07-13 20:38:03,271 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:38:03" (1/1) ... [2021-07-13 20:38:03,276 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 20:38:03,278 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 20:38:03,278 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 20:38:03,278 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 20:38:03,283 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:38:03" (1/1) ... [2021-07-13 20:38:03,283 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:38:03" (1/1) ... [2021-07-13 20:38:03,284 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:38:03" (1/1) ... [2021-07-13 20:38:03,284 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:38:03" (1/1) ... [2021-07-13 20:38:03,290 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:38:03" (1/1) ... [2021-07-13 20:38:03,293 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:38:03" (1/1) ... [2021-07-13 20:38:03,293 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:38:03" (1/1) ... [2021-07-13 20:38:03,297 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 20:38:03,298 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 20:38:03,298 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 20:38:03,298 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 20:38:03,300 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:38:03" (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 20:38:03,363 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-13 20:38:03,363 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-13 20:38:03,363 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-13 20:38:03,363 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-13 20:38:03,363 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-13 20:38:03,364 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-13 20:38:03,364 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-13 20:38:03,364 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 20:38:03,364 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 20:38:03,364 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-13 20:38:03,364 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-13 20:38:03,364 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-13 20:38:03,364 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 20:38:03,510 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 20:38:03,510 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-13 20:38:03,511 INFO L202 PluginConnector]: Adding new model mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:38:03 BoogieIcfgContainer [2021-07-13 20:38:03,511 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 20:38:03,512 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 20:38:03,512 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 20:38:03,514 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 20:38:03,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:38:03" (1/2) ... [2021-07-13 20:38:03,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ed7c9f7 and model type mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 08:38:03, skipping insertion in model container [2021-07-13 20:38:03,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:38:03" (2/2) ... [2021-07-13 20:38:03,516 INFO L111 eAbstractionObserver]: Analyzing ICFG mts-array.wvr.bpl [2021-07-13 20:38:03,519 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 20:38:03,519 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 20:38:03,519 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 20:38:03,520 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 20:38:03,543 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-07-13 20:38:03,557 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-07-13 20:38:03,568 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 20:38:03,568 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 20:38:03,569 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 20:38:03,569 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 20:38:03,569 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 20:38:03,569 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 20:38:03,569 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 20:38:03,569 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 20:38:03,575 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2021-07-13 20:38:03,594 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 20:38:03,596 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 20:38:03,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 20:38:03,603 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:03,603 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 20:38:03,603 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:03,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:03,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1113490327, now seen corresponding path program 1 times [2021-07-13 20:38:03,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:03,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206964187] [2021-07-13 20:38:03,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:03,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:03,736 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 20:38:03,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:03,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206964187] [2021-07-13 20:38:03,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206964187] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:38:03,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:38:03,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 20:38:03,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740597046] [2021-07-13 20:38:03,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 20:38:03,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:03,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 20:38:03,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:38:03,750 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 5 states, 5 states have (on average 3.6) internal successors, (18), 4 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 20:38:03,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:03,797 INFO L93 Difference]: Finished difference Result 154 states and 436 transitions. [2021-07-13 20:38:03,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:38:03,798 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 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 20:38:03,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:03,806 INFO L225 Difference]: With dead ends: 154 [2021-07-13 20:38:03,806 INFO L226 Difference]: Without dead ends: 154 [2021-07-13 20:38:03,807 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:38:03,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-07-13 20:38:03,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 133. [2021-07-13 20:38:03,834 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 20:38:03,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2021-07-13 20:38:03,837 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 18 [2021-07-13 20:38:03,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:03,838 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2021-07-13 20:38:03,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 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 20:38:03,838 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2021-07-13 20:38:03,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 20:38:03,839 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:03,839 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 20:38:03,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 20:38:03,840 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:03,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:03,840 INFO L82 PathProgramCache]: Analyzing trace with hash 2043191081, now seen corresponding path program 1 times [2021-07-13 20:38:03,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:03,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117921246] [2021-07-13 20:38:03,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:03,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:03,873 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 20:38:03,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:03,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117921246] [2021-07-13 20:38:03,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117921246] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:38:03,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:38:03,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 20:38:03,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242202396] [2021-07-13 20:38:03,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 20:38:03,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:03,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 20:38:03,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:38:03,876 INFO L87 Difference]: Start difference. First operand 133 states and 374 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 20:38:03,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:03,901 INFO L93 Difference]: Finished difference Result 158 states and 448 transitions. [2021-07-13 20:38:03,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 20:38:03,902 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 20:38:03,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:03,903 INFO L225 Difference]: With dead ends: 158 [2021-07-13 20:38:03,903 INFO L226 Difference]: Without dead ends: 158 [2021-07-13 20:38:03,904 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:38:03,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-07-13 20:38:03,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2021-07-13 20:38:03,913 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 20:38:03,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2021-07-13 20:38:03,914 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2021-07-13 20:38:03,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:03,914 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2021-07-13 20:38:03,915 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 20:38:03,915 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2021-07-13 20:38:03,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 20:38:03,916 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:03,916 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 20:38:03,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-13 20:38:03,916 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:03,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:03,917 INFO L82 PathProgramCache]: Analyzing trace with hash -219246905, now seen corresponding path program 1 times [2021-07-13 20:38:03,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:03,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181767016] [2021-07-13 20:38:03,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:03,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:04,323 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 20:38:04,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:04,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181767016] [2021-07-13 20:38:04,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181767016] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:04,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327348211] [2021-07-13 20:38:04,324 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 20:38:04,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:04,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:38:04,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:04,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:04,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:04,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-07-13 20:38:04,758 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:04,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:04,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:04,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-07-13 20:38:04,763 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:04,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:04,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:04,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-07-13 20:38:04,769 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:04,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:04,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 22 [2021-07-13 20:38:04,774 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:04,815 INFO L628 ElimStorePlain]: treesize reduction 54, result has 43.2 percent of original size [2021-07-13 20:38:04,818 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 20:38:04,818 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:153, output treesize:35 [2021-07-13 20:38:04,854 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 20:38:04,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327348211] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:04,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:04,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:38:04,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466647081] [2021-07-13 20:38:04,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:38:04,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:04,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:38:04,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:38:04,856 INFO L87 Difference]: Start difference. First operand 158 states and 448 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 20:38:05,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:05,094 INFO L93 Difference]: Finished difference Result 330 states and 935 transitions. [2021-07-13 20:38:05,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 20:38:05,095 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 20:38:05,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:05,097 INFO L225 Difference]: With dead ends: 330 [2021-07-13 20:38:05,097 INFO L226 Difference]: Without dead ends: 315 [2021-07-13 20:38:05,097 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 492.3ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:38:05,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-07-13 20:38:05,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 224. [2021-07-13 20:38:05,106 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 20:38:05,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2021-07-13 20:38:05,107 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2021-07-13 20:38:05,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:05,107 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2021-07-13 20:38:05,107 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 20:38:05,107 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2021-07-13 20:38:05,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 20:38:05,109 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:05,109 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 20:38:05,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-07-13 20:38:05,325 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:05,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:05,326 INFO L82 PathProgramCache]: Analyzing trace with hash -387055997, now seen corresponding path program 2 times [2021-07-13 20:38:05,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:05,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137364772] [2021-07-13 20:38:05,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:05,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:05,546 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 20:38:05,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:05,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137364772] [2021-07-13 20:38:05,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137364772] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:05,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195702410] [2021-07-13 20:38:05,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:38:05,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:38:05,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:05,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:38:05,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:05,794 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:38:05,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:38:05,796 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:05,804 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-07-13 20:38:05,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 13 [2021-07-13 20:38:05,805 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:05,812 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:05,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-13 20:38:05,814 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:05,819 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:38:05,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 1 [2021-07-13 20:38:05,820 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:05,850 INFO L628 ElimStorePlain]: treesize reduction 49, result has 38.0 percent of original size [2021-07-13 20:38:05,854 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:38:05,854 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:145, output treesize:31 [2021-07-13 20:38:05,909 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 20:38:05,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195702410] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:05,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:05,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-07-13 20:38:05,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055884128] [2021-07-13 20:38:05,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:38:05,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:05,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:38:05,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:38:05,910 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 20:38:06,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:06,301 INFO L93 Difference]: Finished difference Result 374 states and 1077 transitions. [2021-07-13 20:38:06,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 20:38:06,302 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 20:38:06,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:06,310 INFO L225 Difference]: With dead ends: 374 [2021-07-13 20:38:06,311 INFO L226 Difference]: Without dead ends: 359 [2021-07-13 20:38:06,311 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 471.1ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:38:06,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-07-13 20:38:06,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 229. [2021-07-13 20:38:06,350 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 20:38:06,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2021-07-13 20:38:06,352 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2021-07-13 20:38:06,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:06,352 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2021-07-13 20:38:06,352 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 20:38:06,352 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2021-07-13 20:38:06,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 20:38:06,353 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:06,353 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 20:38:06,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-13 20:38:06,554 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:06,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:06,554 INFO L82 PathProgramCache]: Analyzing trace with hash -88282549, now seen corresponding path program 3 times [2021-07-13 20:38:06,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:06,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244498692] [2021-07-13 20:38:06,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:06,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:06,769 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 20:38:06,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:06,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244498692] [2021-07-13 20:38:06,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244498692] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:06,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990817874] [2021-07-13 20:38:06,770 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 20:38:06,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 20:38:06,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:06,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:38:06,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:07,081 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:38:07,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-07-13 20:38:07,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:07,088 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-07-13 20:38:07,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 36 [2021-07-13 20:38:07,090 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:07,124 INFO L628 ElimStorePlain]: treesize reduction 38, result has 54.8 percent of original size [2021-07-13 20:38:07,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 20:38:07,129 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:07,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:07,146 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:38:07,147 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:173, output treesize:27 [2021-07-13 20:38:07,189 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 20:38:07,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990817874] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:07,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:07,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-13 20:38:07,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497246946] [2021-07-13 20:38:07,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:38:07,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:07,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:38:07,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:38:07,191 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 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 20:38:07,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:07,378 INFO L93 Difference]: Finished difference Result 296 states and 831 transitions. [2021-07-13 20:38:07,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:38:07,378 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 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 22 [2021-07-13 20:38:07,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:07,400 INFO L225 Difference]: With dead ends: 296 [2021-07-13 20:38:07,400 INFO L226 Difference]: Without dead ends: 281 [2021-07-13 20:38:07,400 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 328.8ms TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:38:07,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-07-13 20:38:07,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 241. [2021-07-13 20:38:07,406 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 20:38:07,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2021-07-13 20:38:07,407 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2021-07-13 20:38:07,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:07,407 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2021-07-13 20:38:07,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 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 20:38:07,407 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2021-07-13 20:38:07,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 20:38:07,419 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:07,419 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 20:38:07,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-13 20:38:07,633 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:07,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:07,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1482543051, now seen corresponding path program 4 times [2021-07-13 20:38:07,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:07,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501150056] [2021-07-13 20:38:07,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:07,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:07,891 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 20:38:07,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:07,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501150056] [2021-07-13 20:38:07,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501150056] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:07,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650795966] [2021-07-13 20:38:07,892 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 20:38:07,925 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:38:07,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:07,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:38:07,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:08,135 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:08,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-13 20:38:08,136 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:08,143 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:38:08,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 1 [2021-07-13 20:38:08,143 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:08,186 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:08,195 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:38:08,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:38:08,197 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:08,212 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-07-13 20:38:08,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 13 [2021-07-13 20:38:08,213 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:08,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:08,269 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:38:08,269 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:73 [2021-07-13 20:38:08,396 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 20:38:08,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650795966] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:08,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:08,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:38:08,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105966067] [2021-07-13 20:38:08,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:38:08,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:08,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:38:08,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:38:08,397 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 20:38:08,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:08,677 INFO L93 Difference]: Finished difference Result 425 states and 1233 transitions. [2021-07-13 20:38:08,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 20:38:08,678 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 20:38:08,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:08,680 INFO L225 Difference]: With dead ends: 425 [2021-07-13 20:38:08,680 INFO L226 Difference]: Without dead ends: 410 [2021-07-13 20:38:08,680 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 425.7ms TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:38:08,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-07-13 20:38:08,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 247. [2021-07-13 20:38:08,686 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 20:38:08,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2021-07-13 20:38:08,688 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2021-07-13 20:38:08,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:08,688 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2021-07-13 20:38:08,688 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 20:38:08,688 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2021-07-13 20:38:08,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:38:08,689 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:08,689 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 20:38:08,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:08,905 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:08,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:08,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1258502875, now seen corresponding path program 5 times [2021-07-13 20:38:08,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:08,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107568909] [2021-07-13 20:38:08,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:08,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:08,945 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 20:38:08,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:08,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107568909] [2021-07-13 20:38:08,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107568909] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:08,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319103336] [2021-07-13 20:38:08,945 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 20:38:08,992 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:38:08,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:08,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:38:08,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:09,072 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 20:38:09,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319103336] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:09,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:09,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:38:09,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366230248] [2021-07-13 20:38:09,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:38:09,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:09,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:38:09,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:38:09,073 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 20:38:09,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:09,408 INFO L93 Difference]: Finished difference Result 619 states and 1783 transitions. [2021-07-13 20:38:09,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:38:09,408 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 20:38:09,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:09,411 INFO L225 Difference]: With dead ends: 619 [2021-07-13 20:38:09,411 INFO L226 Difference]: Without dead ends: 619 [2021-07-13 20:38:09,411 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 173.8ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:38:09,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-07-13 20:38:09,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 297. [2021-07-13 20:38:09,418 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 20:38:09,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 903 transitions. [2021-07-13 20:38:09,419 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 903 transitions. Word has length 24 [2021-07-13 20:38:09,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:09,419 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 903 transitions. [2021-07-13 20:38:09,419 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 20:38:09,419 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 903 transitions. [2021-07-13 20:38:09,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:38:09,420 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:09,420 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 20:38:09,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-07-13 20:38:09,638 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:09,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:09,639 INFO L82 PathProgramCache]: Analyzing trace with hash 2060145577, now seen corresponding path program 6 times [2021-07-13 20:38:09,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:09,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239647687] [2021-07-13 20:38:09,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:09,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:09,670 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 20:38:09,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:09,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239647687] [2021-07-13 20:38:09,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239647687] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:09,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312901212] [2021-07-13 20:38:09,670 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 20:38:09,738 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:38:09,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:09,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:38:09,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:09,825 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 20:38:09,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312901212] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:09,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:09,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:38:09,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423478606] [2021-07-13 20:38:09,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:38:09,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:09,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:38:09,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:38:09,826 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 20:38:10,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:10,454 INFO L93 Difference]: Finished difference Result 1078 states and 2992 transitions. [2021-07-13 20:38:10,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:38:10,455 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 20:38:10,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:10,459 INFO L225 Difference]: With dead ends: 1078 [2021-07-13 20:38:10,459 INFO L226 Difference]: Without dead ends: 1078 [2021-07-13 20:38:10,460 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 395.5ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:38:10,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-07-13 20:38:10,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 302. [2021-07-13 20:38:10,470 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 20:38:10,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 928 transitions. [2021-07-13 20:38:10,471 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 928 transitions. Word has length 24 [2021-07-13 20:38:10,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:10,471 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 928 transitions. [2021-07-13 20:38:10,471 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 20:38:10,471 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 928 transitions. [2021-07-13 20:38:10,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:38:10,472 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:10,472 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 20:38:10,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-07-13 20:38:10,691 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:10,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:10,691 INFO L82 PathProgramCache]: Analyzing trace with hash -705917075, now seen corresponding path program 7 times [2021-07-13 20:38:10,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:10,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788947841] [2021-07-13 20:38:10,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:10,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:10,723 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 20:38:10,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:10,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788947841] [2021-07-13 20:38:10,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788947841] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:10,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153750000] [2021-07-13 20:38:10,724 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 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 20:38:10,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:10,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:38:10,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:10,849 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 20:38:10,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153750000] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:10,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:10,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:38:10,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188014095] [2021-07-13 20:38:10,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:38:10,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:10,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:38:10,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:38:10,852 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 20:38:11,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:11,389 INFO L93 Difference]: Finished difference Result 951 states and 2692 transitions. [2021-07-13 20:38:11,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:38:11,390 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 20:38:11,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:11,393 INFO L225 Difference]: With dead ends: 951 [2021-07-13 20:38:11,393 INFO L226 Difference]: Without dead ends: 951 [2021-07-13 20:38:11,394 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 350.1ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:38:11,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-07-13 20:38:11,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 293. [2021-07-13 20:38:11,402 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 20:38:11,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 894 transitions. [2021-07-13 20:38:11,402 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 894 transitions. Word has length 24 [2021-07-13 20:38:11,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:11,403 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 894 transitions. [2021-07-13 20:38:11,403 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 20:38:11,403 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 894 transitions. [2021-07-13 20:38:11,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:38:11,403 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:11,403 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 20:38:11,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:11,620 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:11,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:11,620 INFO L82 PathProgramCache]: Analyzing trace with hash -731730967, now seen corresponding path program 1 times [2021-07-13 20:38:11,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:11,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576118736] [2021-07-13 20:38:11,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:11,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:11,643 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 20:38:11,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:11,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576118736] [2021-07-13 20:38:11,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576118736] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:11,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64512817] [2021-07-13 20:38:11,644 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 20:38:11,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:11,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 20:38:11,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:11,769 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 20:38:11,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64512817] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:11,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:11,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-13 20:38:11,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074754962] [2021-07-13 20:38:11,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:38:11,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:11,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:38:11,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:38:11,770 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 20:38:11,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:11,847 INFO L93 Difference]: Finished difference Result 669 states and 1943 transitions. [2021-07-13 20:38:11,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:38:11,847 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 20:38:11,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:11,850 INFO L225 Difference]: With dead ends: 669 [2021-07-13 20:38:11,850 INFO L226 Difference]: Without dead ends: 663 [2021-07-13 20:38:11,850 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 54.8ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:38:11,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-07-13 20:38:11,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 413. [2021-07-13 20:38:11,858 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 20:38:11,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1306 transitions. [2021-07-13 20:38:11,859 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1306 transitions. Word has length 24 [2021-07-13 20:38:11,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:11,859 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 1306 transitions. [2021-07-13 20:38:11,859 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 20:38:11,859 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1306 transitions. [2021-07-13 20:38:11,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:38:11,860 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:11,860 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 20:38:12,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-07-13 20:38:12,077 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:12,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:12,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1168699675, now seen corresponding path program 8 times [2021-07-13 20:38:12,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:12,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568509305] [2021-07-13 20:38:12,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:12,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:12,107 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 20:38:12,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:12,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568509305] [2021-07-13 20:38:12,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568509305] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:12,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446693803] [2021-07-13 20:38:12,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:38:12,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:38:12,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:12,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:38:12,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:12,219 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 20:38:12,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446693803] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:12,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:12,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-13 20:38:12,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541059794] [2021-07-13 20:38:12,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:38:12,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:12,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:38:12,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:38:12,220 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 20:38:12,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:12,385 INFO L93 Difference]: Finished difference Result 710 states and 2124 transitions. [2021-07-13 20:38:12,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:38:12,385 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 20:38:12,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:12,388 INFO L225 Difference]: With dead ends: 710 [2021-07-13 20:38:12,388 INFO L226 Difference]: Without dead ends: 672 [2021-07-13 20:38:12,388 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 130.3ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:38:12,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-07-13 20:38:12,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 515. [2021-07-13 20:38:12,397 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 20:38:12,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1633 transitions. [2021-07-13 20:38:12,420 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1633 transitions. Word has length 24 [2021-07-13 20:38:12,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:12,420 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1633 transitions. [2021-07-13 20:38:12,420 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 20:38:12,420 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1633 transitions. [2021-07-13 20:38:12,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:38:12,421 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:12,421 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 20:38:12,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:12,634 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:12,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:12,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1874657007, now seen corresponding path program 2 times [2021-07-13 20:38:12,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:12,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552124972] [2021-07-13 20:38:12,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:12,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:12,666 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 20:38:12,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:12,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552124972] [2021-07-13 20:38:12,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552124972] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:12,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143391946] [2021-07-13 20:38:12,666 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) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:12,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:38:12,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:12,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 20:38:12,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:12,772 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 20:38:12,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143391946] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:12,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:12,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-13 20:38:12,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495635214] [2021-07-13 20:38:12,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:38:12,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:12,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:38:12,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:38:12,773 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 20:38:12,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:12,864 INFO L93 Difference]: Finished difference Result 830 states and 2453 transitions. [2021-07-13 20:38:12,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:38:12,865 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 20:38:12,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:12,868 INFO L225 Difference]: With dead ends: 830 [2021-07-13 20:38:12,868 INFO L226 Difference]: Without dead ends: 830 [2021-07-13 20:38:12,868 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 58.1ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:38:12,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-07-13 20:38:12,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 530. [2021-07-13 20:38:12,878 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 20:38:12,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1668 transitions. [2021-07-13 20:38:12,879 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1668 transitions. Word has length 24 [2021-07-13 20:38:12,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:12,879 INFO L482 AbstractCegarLoop]: Abstraction has 530 states and 1668 transitions. [2021-07-13 20:38:12,879 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 20:38:12,879 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1668 transitions. [2021-07-13 20:38:12,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:38:12,880 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:12,880 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 20:38:13,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:13,097 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:13,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:13,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1073628723, now seen corresponding path program 9 times [2021-07-13 20:38:13,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:13,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625219259] [2021-07-13 20:38:13,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:13,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:13,136 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 20:38:13,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:13,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625219259] [2021-07-13 20:38:13,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625219259] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:13,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850305258] [2021-07-13 20:38:13,136 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 20:38:13,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:38:13,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:13,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:38:13,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:13,235 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 20:38:13,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850305258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:13,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:13,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:38:13,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389117817] [2021-07-13 20:38:13,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:38:13,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:13,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:38:13,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:38:13,236 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 20:38:13,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:13,484 INFO L93 Difference]: Finished difference Result 1196 states and 3492 transitions. [2021-07-13 20:38:13,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:38:13,485 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 20:38:13,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:13,489 INFO L225 Difference]: With dead ends: 1196 [2021-07-13 20:38:13,489 INFO L226 Difference]: Without dead ends: 1196 [2021-07-13 20:38:13,489 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 144.4ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:38:13,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-07-13 20:38:13,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 542. [2021-07-13 20:38:13,501 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 20:38:13,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1704 transitions. [2021-07-13 20:38:13,502 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1704 transitions. Word has length 24 [2021-07-13 20:38:13,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:13,502 INFO L482 AbstractCegarLoop]: Abstraction has 542 states and 1704 transitions. [2021-07-13 20:38:13,503 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 20:38:13,503 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1704 transitions. [2021-07-13 20:38:13,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:38:13,504 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:13,504 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 20:38:13,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-07-13 20:38:13,720 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:13,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:13,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1858542817, now seen corresponding path program 10 times [2021-07-13 20:38:13,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:13,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152825300] [2021-07-13 20:38:13,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:13,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:13,749 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 20:38:13,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:13,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152825300] [2021-07-13 20:38:13,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152825300] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:13,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7973645] [2021-07-13 20:38:13,749 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 20:38:13,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:38:13,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:13,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:38:13,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:13,829 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 20:38:13,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7973645] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:13,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:13,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:38:13,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840093061] [2021-07-13 20:38:13,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:38:13,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:13,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:38:13,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:38:13,830 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 20:38:14,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:14,232 INFO L93 Difference]: Finished difference Result 1492 states and 4245 transitions. [2021-07-13 20:38:14,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 20:38:14,233 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 20:38:14,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:14,238 INFO L225 Difference]: With dead ends: 1492 [2021-07-13 20:38:14,238 INFO L226 Difference]: Without dead ends: 1492 [2021-07-13 20:38:14,239 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 226.3ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:38:14,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-07-13 20:38:14,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 586. [2021-07-13 20:38:14,255 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 20:38:14,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1846 transitions. [2021-07-13 20:38:14,256 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1846 transitions. Word has length 24 [2021-07-13 20:38:14,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:14,256 INFO L482 AbstractCegarLoop]: Abstraction has 586 states and 1846 transitions. [2021-07-13 20:38:14,256 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 20:38:14,256 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1846 transitions. [2021-07-13 20:38:14,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:38:14,258 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:14,258 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 20:38:14,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:14,474 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:14,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:14,475 INFO L82 PathProgramCache]: Analyzing trace with hash 775520161, now seen corresponding path program 11 times [2021-07-13 20:38:14,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:14,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632321797] [2021-07-13 20:38:14,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:14,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:14,514 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 20:38:14,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:14,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632321797] [2021-07-13 20:38:14,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632321797] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:14,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844795740] [2021-07-13 20:38:14,515 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) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:14,559 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:38:14,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:14,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:38:14,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:14,622 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 20:38:14,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844795740] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:14,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:14,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-13 20:38:14,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658760565] [2021-07-13 20:38:14,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:38:14,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:14,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:38:14,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:38:14,624 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 20:38:14,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:14,843 INFO L93 Difference]: Finished difference Result 1258 states and 3765 transitions. [2021-07-13 20:38:14,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:38:14,843 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 20:38:14,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:14,847 INFO L225 Difference]: With dead ends: 1258 [2021-07-13 20:38:14,847 INFO L226 Difference]: Without dead ends: 1248 [2021-07-13 20:38:14,848 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 148.3ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:38:14,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-07-13 20:38:14,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 758. [2021-07-13 20:38:14,862 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 20:38:14,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2441 transitions. [2021-07-13 20:38:14,864 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2441 transitions. Word has length 24 [2021-07-13 20:38:14,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:14,864 INFO L482 AbstractCegarLoop]: Abstraction has 758 states and 2441 transitions. [2021-07-13 20:38:14,864 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 20:38:14,864 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2441 transitions. [2021-07-13 20:38:14,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:38:14,865 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:14,866 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 20:38:15,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-07-13 20:38:15,082 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:15,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:15,082 INFO L82 PathProgramCache]: Analyzing trace with hash -2048369017, now seen corresponding path program 12 times [2021-07-13 20:38:15,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:15,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475989166] [2021-07-13 20:38:15,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:15,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:15,137 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 20:38:15,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:15,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475989166] [2021-07-13 20:38:15,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475989166] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:15,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870394952] [2021-07-13 20:38:15,138 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 20:38:15,177 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:38:15,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:15,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:38:15,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:15,242 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 20:38:15,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870394952] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:15,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:15,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-13 20:38:15,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688768968] [2021-07-13 20:38:15,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:38:15,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:15,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:38:15,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:38:15,243 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 20:38:15,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:15,492 INFO L93 Difference]: Finished difference Result 1329 states and 4025 transitions. [2021-07-13 20:38:15,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:38:15,493 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 20:38:15,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:15,497 INFO L225 Difference]: With dead ends: 1329 [2021-07-13 20:38:15,497 INFO L226 Difference]: Without dead ends: 1329 [2021-07-13 20:38:15,498 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 182.8ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:38:15,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-07-13 20:38:15,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 764. [2021-07-13 20:38:15,511 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 20:38:15,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2457 transitions. [2021-07-13 20:38:15,513 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2457 transitions. Word has length 24 [2021-07-13 20:38:15,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:15,513 INFO L482 AbstractCegarLoop]: Abstraction has 764 states and 2457 transitions. [2021-07-13 20:38:15,513 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 20:38:15,513 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2457 transitions. [2021-07-13 20:38:15,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:38:15,514 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:15,514 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 20:38:15,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:15,730 INFO L430 AbstractCegarLoop]: === Iteration 17 === [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 -1490304735, now seen corresponding path program 13 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 [754287084] [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 20:38:15,761 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 20:38:15,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:15,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754287084] [2021-07-13 20:38:15,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754287084] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:15,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123748913] [2021-07-13 20:38:15,761 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 20:38:15,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:15,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:38:15,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:15,838 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 20:38:15,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123748913] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:15,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:15,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:38:15,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409146429] [2021-07-13 20:38:15,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:38:15,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:15,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:38:15,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:38:15,839 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 20:38:16,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:16,148 INFO L93 Difference]: Finished difference Result 1548 states and 4638 transitions. [2021-07-13 20:38:16,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:38:16,149 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 20:38:16,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:16,154 INFO L225 Difference]: With dead ends: 1548 [2021-07-13 20:38:16,154 INFO L226 Difference]: Without dead ends: 1544 [2021-07-13 20:38:16,154 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 184.0ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:38:16,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-07-13 20:38:16,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 772. [2021-07-13 20:38:16,170 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 20:38:16,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2471 transitions. [2021-07-13 20:38:16,171 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2471 transitions. Word has length 24 [2021-07-13 20:38:16,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:16,171 INFO L482 AbstractCegarLoop]: Abstraction has 772 states and 2471 transitions. [2021-07-13 20:38:16,171 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 20:38:16,171 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2471 transitions. [2021-07-13 20:38:16,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:38:16,173 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:16,173 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 20:38:16,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-07-13 20:38:16,389 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:16,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:16,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1541712485, now seen corresponding path program 14 times [2021-07-13 20:38:16,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:16,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385617136] [2021-07-13 20:38:16,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:16,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:16,424 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 20:38:16,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:16,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385617136] [2021-07-13 20:38:16,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385617136] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:16,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674163132] [2021-07-13 20:38:16,424 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 20:38:16,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:38:16,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:16,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:38:16,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:16,573 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 20:38:16,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674163132] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:16,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:16,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:38:16,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734674410] [2021-07-13 20:38:16,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:38:16,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:16,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:38:16,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:38:16,574 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 20:38:17,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:17,210 INFO L93 Difference]: Finished difference Result 2734 states and 8136 transitions. [2021-07-13 20:38:17,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 20:38:17,210 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 20:38:17,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:17,220 INFO L225 Difference]: With dead ends: 2734 [2021-07-13 20:38:17,220 INFO L226 Difference]: Without dead ends: 2734 [2021-07-13 20:38:17,221 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 377.1ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:38:17,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-07-13 20:38:17,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 841. [2021-07-13 20:38:17,246 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 20:38:17,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2781 transitions. [2021-07-13 20:38:17,247 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2781 transitions. Word has length 24 [2021-07-13 20:38:17,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:17,247 INFO L482 AbstractCegarLoop]: Abstraction has 841 states and 2781 transitions. [2021-07-13 20:38:17,248 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 20:38:17,248 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2781 transitions. [2021-07-13 20:38:17,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:38:17,249 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:17,249 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 20:38:17,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-07-13 20:38:17,465 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:17,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:17,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1224350167, now seen corresponding path program 15 times [2021-07-13 20:38:17,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:17,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604512207] [2021-07-13 20:38:17,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:17,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:17,498 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 20:38:17,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:17,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604512207] [2021-07-13 20:38:17,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604512207] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:17,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329701451] [2021-07-13 20:38:17,498 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 20:38:17,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:38:17,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:17,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:38:17,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:17,613 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 20:38:17,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329701451] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:17,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:17,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:38:17,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666912721] [2021-07-13 20:38:17,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:38:17,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:17,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:38:17,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:38:17,614 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 20:38:18,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:18,253 INFO L93 Difference]: Finished difference Result 2693 states and 8043 transitions. [2021-07-13 20:38:18,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 20:38:18,254 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 20:38:18,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:18,269 INFO L225 Difference]: With dead ends: 2693 [2021-07-13 20:38:18,270 INFO L226 Difference]: Without dead ends: 2693 [2021-07-13 20:38:18,270 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 380.2ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:38:18,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-07-13 20:38:18,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 831. [2021-07-13 20:38:18,323 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 20:38:18,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2730 transitions. [2021-07-13 20:38:18,325 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2730 transitions. Word has length 24 [2021-07-13 20:38:18,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:18,325 INFO L482 AbstractCegarLoop]: Abstraction has 831 states and 2730 transitions. [2021-07-13 20:38:18,325 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 20:38:18,325 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2730 transitions. [2021-07-13 20:38:18,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:38:18,327 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:18,327 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 20:38:18,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:18,527 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:18,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:18,528 INFO L82 PathProgramCache]: Analyzing trace with hash 936318707, now seen corresponding path program 16 times [2021-07-13 20:38:18,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:18,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662669758] [2021-07-13 20:38:18,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:18,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:18,583 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 20:38:18,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:18,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662669758] [2021-07-13 20:38:18,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662669758] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:18,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436114013] [2021-07-13 20:38:18,583 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 20:38:18,640 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:38:18,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:18,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:38:18,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:18,732 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 20:38:18,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436114013] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:18,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:18,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:38:18,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519791654] [2021-07-13 20:38:18,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:38:18,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:18,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:38:18,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:38:18,733 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 20:38:19,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:19,484 INFO L93 Difference]: Finished difference Result 2677 states and 7780 transitions. [2021-07-13 20:38:19,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:38:19,484 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 20:38:19,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:19,490 INFO L225 Difference]: With dead ends: 2677 [2021-07-13 20:38:19,490 INFO L226 Difference]: Without dead ends: 2677 [2021-07-13 20:38:19,491 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 376.0ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:38:19,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-07-13 20:38:19,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 845. [2021-07-13 20:38:19,528 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 20:38:19,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2785 transitions. [2021-07-13 20:38:19,530 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2785 transitions. Word has length 24 [2021-07-13 20:38:19,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:19,530 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2785 transitions. [2021-07-13 20:38:19,530 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 20:38:19,530 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2785 transitions. [2021-07-13 20:38:19,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:38:19,531 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:19,531 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 20:38:19,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-07-13 20:38:19,747 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:19,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:19,747 INFO L82 PathProgramCache]: Analyzing trace with hash 2008635681, now seen corresponding path program 17 times [2021-07-13 20:38:19,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:19,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746320474] [2021-07-13 20:38:19,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:19,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:19,793 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 20:38:19,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:19,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746320474] [2021-07-13 20:38:19,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746320474] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:19,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079332964] [2021-07-13 20:38:19,793 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 20:38:19,820 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:38:19,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:19,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:38:19,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:19,869 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 20:38:19,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079332964] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:19,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:19,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:38:19,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844120296] [2021-07-13 20:38:19,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:38:19,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:19,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:38:19,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:38:19,870 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 20:38:20,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:20,326 INFO L93 Difference]: Finished difference Result 2474 states and 7308 transitions. [2021-07-13 20:38:20,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:38:20,327 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 20:38:20,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:20,331 INFO L225 Difference]: With dead ends: 2474 [2021-07-13 20:38:20,331 INFO L226 Difference]: Without dead ends: 2470 [2021-07-13 20:38:20,332 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 280.0ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:38:20,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-07-13 20:38:20,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 845. [2021-07-13 20:38:20,353 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 20:38:20,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2783 transitions. [2021-07-13 20:38:20,354 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2783 transitions. Word has length 24 [2021-07-13 20:38:20,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:20,355 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2783 transitions. [2021-07-13 20:38:20,355 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 20:38:20,355 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2783 transitions. [2021-07-13 20:38:20,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:38:20,357 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:20,357 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 20:38:20,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:20,573 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:20,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:20,573 INFO L82 PathProgramCache]: Analyzing trace with hash 2817957, now seen corresponding path program 18 times [2021-07-13 20:38:20,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:20,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589886138] [2021-07-13 20:38:20,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:20,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:20,608 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 20:38:20,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:20,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589886138] [2021-07-13 20:38:20,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589886138] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:20,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874469501] [2021-07-13 20:38:20,609 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 20:38:20,653 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:38:20,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:20,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:38:20,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:20,728 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 20:38:20,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874469501] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:20,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:20,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:38:20,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517415485] [2021-07-13 20:38:20,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:38:20,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:20,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:38:20,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:38:20,729 INFO L87 Difference]: Start difference. First operand 845 states and 2783 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 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 20:38:21,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:21,294 INFO L93 Difference]: Finished difference Result 2514 states and 7408 transitions. [2021-07-13 20:38:21,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:38:21,317 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:38:21,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:21,322 INFO L225 Difference]: With dead ends: 2514 [2021-07-13 20:38:21,322 INFO L226 Difference]: Without dead ends: 2514 [2021-07-13 20:38:21,323 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 335.8ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:38:21,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-07-13 20:38:21,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 853. [2021-07-13 20:38:21,362 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 20:38:21,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2815 transitions. [2021-07-13 20:38:21,364 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2815 transitions. Word has length 24 [2021-07-13 20:38:21,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:21,364 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2815 transitions. [2021-07-13 20:38:21,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 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 20:38:21,364 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2815 transitions. [2021-07-13 20:38:21,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:38:21,366 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:21,366 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 20:38:21,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-07-13 20:38:21,581 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:21,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:21,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1052559437, now seen corresponding path program 19 times [2021-07-13 20:38:21,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:21,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601575435] [2021-07-13 20:38:21,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:21,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:21,622 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 20:38:21,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:21,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601575435] [2021-07-13 20:38:21,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601575435] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:21,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541803154] [2021-07-13 20:38:21,622 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 20:38:21,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:21,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:38:21,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:21,726 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 20:38:21,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541803154] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:21,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:21,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:38:21,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893183591] [2021-07-13 20:38:21,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:38:21,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:21,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:38:21,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:38:21,727 INFO L87 Difference]: Start difference. First operand 853 states and 2815 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 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 20:38:22,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:22,299 INFO L93 Difference]: Finished difference Result 2332 states and 6984 transitions. [2021-07-13 20:38:22,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:38:22,299 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:38:22,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:22,304 INFO L225 Difference]: With dead ends: 2332 [2021-07-13 20:38:22,304 INFO L226 Difference]: Without dead ends: 2328 [2021-07-13 20:38:22,305 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 324.7ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:38:22,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-07-13 20:38:22,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 853. [2021-07-13 20:38:22,325 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 20:38:22,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2813 transitions. [2021-07-13 20:38:22,327 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2813 transitions. Word has length 24 [2021-07-13 20:38:22,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:22,327 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2813 transitions. [2021-07-13 20:38:22,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 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 20:38:22,327 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2813 transitions. [2021-07-13 20:38:22,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:38:22,329 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:22,329 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 20:38:22,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-07-13 20:38:22,545 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:22,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:22,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1615861683, now seen corresponding path program 3 times [2021-07-13 20:38:22,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:22,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130878206] [2021-07-13 20:38:22,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:22,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:22,566 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 20:38:22,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:22,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130878206] [2021-07-13 20:38:22,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130878206] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:22,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891897099] [2021-07-13 20:38:22,567 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 20:38:22,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 20:38:22,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:22,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 20:38:22,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:22,682 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 20:38:22,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891897099] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:22,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:22,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-13 20:38:22,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185610926] [2021-07-13 20:38:22,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:38:22,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:22,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:38:22,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:38:22,684 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 20:38:22,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:22,743 INFO L93 Difference]: Finished difference Result 929 states and 3034 transitions. [2021-07-13 20:38:22,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:38:22,744 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 20:38:22,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:22,746 INFO L225 Difference]: With dead ends: 929 [2021-07-13 20:38:22,746 INFO L226 Difference]: Without dead ends: 929 [2021-07-13 20:38:22,746 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 41.9ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:38:22,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-07-13 20:38:22,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 780. [2021-07-13 20:38:22,761 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 20:38:22,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2573 transitions. [2021-07-13 20:38:22,763 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2573 transitions. Word has length 24 [2021-07-13 20:38:22,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:22,763 INFO L482 AbstractCegarLoop]: Abstraction has 780 states and 2573 transitions. [2021-07-13 20:38:22,763 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 20:38:22,763 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2573 transitions. [2021-07-13 20:38:22,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:38:22,765 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:22,765 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 20:38:22,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:22,981 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:22,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:22,982 INFO L82 PathProgramCache]: Analyzing trace with hash -685661939, now seen corresponding path program 20 times [2021-07-13 20:38:22,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:22,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879853248] [2021-07-13 20:38:22,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:22,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:23,008 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 20:38:23,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:23,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879853248] [2021-07-13 20:38:23,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879853248] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:23,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946944877] [2021-07-13 20:38:23,009 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 20:38:23,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:38:23,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:23,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:38:23,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:23,078 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 20:38:23,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946944877] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:23,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:23,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-13 20:38:23,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861761995] [2021-07-13 20:38:23,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:38:23,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:23,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:38:23,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:38:23,080 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 20:38:23,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:23,307 INFO L93 Difference]: Finished difference Result 1555 states and 4761 transitions. [2021-07-13 20:38:23,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:38:23,307 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 20:38:23,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:23,311 INFO L225 Difference]: With dead ends: 1555 [2021-07-13 20:38:23,311 INFO L226 Difference]: Without dead ends: 1555 [2021-07-13 20:38:23,311 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 117.5ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:38:23,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-07-13 20:38:23,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 842. [2021-07-13 20:38:23,324 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 20:38:23,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2772 transitions. [2021-07-13 20:38:23,326 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2772 transitions. Word has length 24 [2021-07-13 20:38:23,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:23,326 INFO L482 AbstractCegarLoop]: Abstraction has 842 states and 2772 transitions. [2021-07-13 20:38:23,326 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 20:38:23,326 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2772 transitions. [2021-07-13 20:38:23,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:38:23,327 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:23,327 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 20:38:23,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-07-13 20:38:23,543 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:23,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:23,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1217017513, now seen corresponding path program 21 times [2021-07-13 20:38:23,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:23,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472548102] [2021-07-13 20:38:23,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:23,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:23,567 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 20:38:23,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:23,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472548102] [2021-07-13 20:38:23,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472548102] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:23,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299203908] [2021-07-13 20:38:23,568 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 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 20:38:23,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:38:23,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:23,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:38:23,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:23,621 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 20:38:23,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299203908] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:23,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:23,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 20:38:23,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130299608] [2021-07-13 20:38:23,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:38:23,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:23,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:38:23,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:38:23,623 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 20:38:23,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:23,762 INFO L93 Difference]: Finished difference Result 1605 states and 4891 transitions. [2021-07-13 20:38:23,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:38:23,762 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 20:38:23,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:23,765 INFO L225 Difference]: With dead ends: 1605 [2021-07-13 20:38:23,765 INFO L226 Difference]: Without dead ends: 1605 [2021-07-13 20:38:23,766 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 78.7ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:38:23,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-07-13 20:38:23,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 896. [2021-07-13 20:38:23,779 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 20:38:23,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2945 transitions. [2021-07-13 20:38:23,781 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2945 transitions. Word has length 24 [2021-07-13 20:38:23,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:23,781 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2945 transitions. [2021-07-13 20:38:23,781 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 20:38:23,781 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2945 transitions. [2021-07-13 20:38:23,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:38:23,783 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:23,783 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 20:38:23,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:23,999 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:23,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:23,999 INFO L82 PathProgramCache]: Analyzing trace with hash -2131830039, now seen corresponding path program 22 times [2021-07-13 20:38:23,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:24,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812475608] [2021-07-13 20:38:24,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:24,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:24,021 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 20:38:24,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:24,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812475608] [2021-07-13 20:38:24,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812475608] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:24,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708500141] [2021-07-13 20:38:24,022 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 20:38:24,047 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:38:24,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:24,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:38:24,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:24,079 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 20:38:24,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708500141] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:24,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:24,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 20:38:24,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512250754] [2021-07-13 20:38:24,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:38:24,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:24,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:38:24,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:38:24,080 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 20:38:24,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:24,210 INFO L93 Difference]: Finished difference Result 1524 states and 4690 transitions. [2021-07-13 20:38:24,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:38:24,211 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 20:38:24,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:24,214 INFO L225 Difference]: With dead ends: 1524 [2021-07-13 20:38:24,214 INFO L226 Difference]: Without dead ends: 1520 [2021-07-13 20:38:24,214 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 74.3ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:38:24,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-07-13 20:38:24,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 896. [2021-07-13 20:38:24,228 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 20:38:24,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2943 transitions. [2021-07-13 20:38:24,230 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2943 transitions. Word has length 24 [2021-07-13 20:38:24,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:24,230 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2943 transitions. [2021-07-13 20:38:24,230 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 20:38:24,230 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2943 transitions. [2021-07-13 20:38:24,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:38:24,231 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:24,231 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 20:38:24,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-07-13 20:38:24,446 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:24,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:24,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1241435117, now seen corresponding path program 23 times [2021-07-13 20:38:24,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:24,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295582492] [2021-07-13 20:38:24,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:24,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:24,479 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 20:38:24,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:24,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295582492] [2021-07-13 20:38:24,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295582492] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:24,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442890134] [2021-07-13 20:38:24,480 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 20:38:24,504 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:38:24,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:24,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:38:24,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:24,554 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 20:38:24,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442890134] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:24,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:24,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-13 20:38:24,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576437720] [2021-07-13 20:38:24,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:38:24,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:24,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:38:24,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:38:24,563 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 20:38:24,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:24,755 INFO L93 Difference]: Finished difference Result 1508 states and 4652 transitions. [2021-07-13 20:38:24,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:38:24,755 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 20:38:24,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:24,785 INFO L225 Difference]: With dead ends: 1508 [2021-07-13 20:38:24,786 INFO L226 Difference]: Without dead ends: 1496 [2021-07-13 20:38:24,786 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 114.5ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:38:24,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-07-13 20:38:24,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 904. [2021-07-13 20:38:24,798 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 20:38:24,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2959 transitions. [2021-07-13 20:38:24,816 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2959 transitions. Word has length 24 [2021-07-13 20:38:24,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:24,817 INFO L482 AbstractCegarLoop]: Abstraction has 904 states and 2959 transitions. [2021-07-13 20:38:24,817 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 20:38:24,817 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2959 transitions. [2021-07-13 20:38:24,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:38:24,818 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:24,818 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 20:38:25,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-07-13 20:38:25,034 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:25,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:25,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1243112745, now seen corresponding path program 24 times [2021-07-13 20:38:25,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:25,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330953760] [2021-07-13 20:38:25,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:25,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:25,061 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 20:38:25,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:25,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330953760] [2021-07-13 20:38:25,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330953760] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:25,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571237640] [2021-07-13 20:38:25,061 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 20:38:25,086 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:38:25,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:25,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:38:25,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:25,142 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 20:38:25,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571237640] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:25,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:25,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:38:25,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381422801] [2021-07-13 20:38:25,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:38:25,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:25,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:38:25,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:38:25,143 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 20:38:25,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:25,574 INFO L93 Difference]: Finished difference Result 2412 states and 7565 transitions. [2021-07-13 20:38:25,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:38:25,574 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 20:38:25,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:25,578 INFO L225 Difference]: With dead ends: 2412 [2021-07-13 20:38:25,578 INFO L226 Difference]: Without dead ends: 2412 [2021-07-13 20:38:25,579 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 285.1ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:38:25,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-07-13 20:38:25,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 960. [2021-07-13 20:38:25,597 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 20:38:25,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3229 transitions. [2021-07-13 20:38:25,599 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3229 transitions. Word has length 24 [2021-07-13 20:38:25,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:25,599 INFO L482 AbstractCegarLoop]: Abstraction has 960 states and 3229 transitions. [2021-07-13 20:38:25,599 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 20:38:25,599 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3229 transitions. [2021-07-13 20:38:25,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:38:25,601 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:25,601 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 20:38:25,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:25,817 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:25,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:25,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1522949907, now seen corresponding path program 25 times [2021-07-13 20:38:25,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:25,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803486299] [2021-07-13 20:38:25,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:25,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:25,847 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 20:38:25,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:25,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803486299] [2021-07-13 20:38:25,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803486299] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:25,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368528779] [2021-07-13 20:38:25,848 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 20:38:25,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:25,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:38:25,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:25,954 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 20:38:25,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368528779] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:25,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:25,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:38:25,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570329999] [2021-07-13 20:38:25,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:38:25,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:25,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:38:25,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:38:25,956 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 20:38:26,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:26,465 INFO L93 Difference]: Finished difference Result 2335 states and 7372 transitions. [2021-07-13 20:38:26,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:38:26,465 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 20:38:26,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:26,469 INFO L225 Difference]: With dead ends: 2335 [2021-07-13 20:38:26,469 INFO L226 Difference]: Without dead ends: 2335 [2021-07-13 20:38:26,470 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 304.9ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:38:26,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-07-13 20:38:26,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 957. [2021-07-13 20:38:26,486 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 20:38:26,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-07-13 20:38:26,488 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-07-13 20:38:26,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:26,489 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-07-13 20:38:26,489 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 20:38:26,489 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-07-13 20:38:26,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:38:26,490 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:26,490 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 20:38:26,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:26,706 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:26,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:26,707 INFO L82 PathProgramCache]: Analyzing trace with hash 637718967, now seen corresponding path program 26 times [2021-07-13 20:38:26,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:26,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289282892] [2021-07-13 20:38:26,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:26,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:26,738 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 20:38:26,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:26,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289282892] [2021-07-13 20:38:26,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289282892] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:26,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190553737] [2021-07-13 20:38:26,739 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 20:38:26,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:38:26,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:26,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:38:26,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:26,852 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 20:38:26,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190553737] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:26,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:26,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:38:26,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725115234] [2021-07-13 20:38:26,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:38:26,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:26,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:38:26,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:38:26,853 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 20:38:27,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:27,266 INFO L93 Difference]: Finished difference Result 2285 states and 7121 transitions. [2021-07-13 20:38:27,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:38:27,266 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 20:38:27,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:27,270 INFO L225 Difference]: With dead ends: 2285 [2021-07-13 20:38:27,270 INFO L226 Difference]: Without dead ends: 2285 [2021-07-13 20:38:27,270 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 270.6ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:38:27,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-07-13 20:38:27,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 963. [2021-07-13 20:38:27,287 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 20:38:27,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-07-13 20:38:27,289 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-07-13 20:38:27,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:27,289 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-07-13 20:38:27,289 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 20:38:27,289 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-07-13 20:38:27,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:38:27,291 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:27,291 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 20:38:27,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:27,506 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:27,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:27,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1710035941, now seen corresponding path program 27 times [2021-07-13 20:38:27,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:27,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937433598] [2021-07-13 20:38:27,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:27,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:27,532 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 20:38:27,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:27,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937433598] [2021-07-13 20:38:27,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937433598] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:27,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619949697] [2021-07-13 20:38:27,533 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 20:38:27,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:38:27,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:27,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:38:27,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:27,656 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 20:38:27,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619949697] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:27,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:27,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:38:27,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329453569] [2021-07-13 20:38:27,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:38:27,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:27,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:38:27,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:38:27,658 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 20:38:27,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:27,981 INFO L93 Difference]: Finished difference Result 2176 states and 6849 transitions. [2021-07-13 20:38:27,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:38:27,982 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 20:38:27,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:27,985 INFO L225 Difference]: With dead ends: 2176 [2021-07-13 20:38:27,985 INFO L226 Difference]: Without dead ends: 2172 [2021-07-13 20:38:27,987 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 194.2ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:38:27,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-07-13 20:38:28,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 957. [2021-07-13 20:38:28,003 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 20:38:28,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-07-13 20:38:28,005 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-07-13 20:38:28,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:28,005 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-07-13 20:38:28,005 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 20:38:28,005 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-07-13 20:38:28,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:38:28,007 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:28,007 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 20:38:28,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:28,222 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:28,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:28,222 INFO L82 PathProgramCache]: Analyzing trace with hash -295781783, now seen corresponding path program 28 times [2021-07-13 20:38:28,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:28,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707687230] [2021-07-13 20:38:28,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:28,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:28,250 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 20:38:28,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:28,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707687230] [2021-07-13 20:38:28,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707687230] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:28,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240017825] [2021-07-13 20:38:28,251 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:38:28,274 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:38:28,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:28,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:38:28,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:28,340 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 20:38:28,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240017825] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:28,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:28,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:38:28,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274531413] [2021-07-13 20:38:28,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:38:28,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:28,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:38:28,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:38:28,341 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 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 20:38:28,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:28,673 INFO L93 Difference]: Finished difference Result 2199 states and 6893 transitions. [2021-07-13 20:38:28,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:38:28,673 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:38:28,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:28,676 INFO L225 Difference]: With dead ends: 2199 [2021-07-13 20:38:28,676 INFO L226 Difference]: Without dead ends: 2199 [2021-07-13 20:38:28,677 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 213.4ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:38:28,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-07-13 20:38:28,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 963. [2021-07-13 20:38:28,693 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 20:38:28,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-07-13 20:38:28,695 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-07-13 20:38:28,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:28,695 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-07-13 20:38:28,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 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 20:38:28,695 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-07-13 20:38:28,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:38:28,697 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:28,697 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 20:38:28,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:28,912 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:28,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:28,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1351159177, now seen corresponding path program 29 times [2021-07-13 20:38:28,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:28,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95472670] [2021-07-13 20:38:28,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:28,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:28,948 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 20:38:28,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:28,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95472670] [2021-07-13 20:38:28,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95472670] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:28,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437340118] [2021-07-13 20:38:28,948 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 20:38:28,971 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:38:28,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:28,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:38:28,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:29,029 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 20:38:29,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437340118] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:29,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:29,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:38:29,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968495649] [2021-07-13 20:38:29,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:38:29,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:29,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:38:29,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:38:29,030 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 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 20:38:29,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:29,408 INFO L93 Difference]: Finished difference Result 2156 states and 6791 transitions. [2021-07-13 20:38:29,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:38:29,409 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:38:29,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:29,412 INFO L225 Difference]: With dead ends: 2156 [2021-07-13 20:38:29,412 INFO L226 Difference]: Without dead ends: 2152 [2021-07-13 20:38:29,412 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 247.4ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:38:29,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-07-13 20:38:29,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 957. [2021-07-13 20:38:29,428 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 20:38:29,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-07-13 20:38:29,430 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-07-13 20:38:29,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:29,430 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-07-13 20:38:29,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 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 20:38:29,430 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-07-13 20:38:29,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:38:29,431 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:29,432 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 20:38:29,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-07-13 20:38:29,632 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:29,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:29,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1252113, now seen corresponding path program 30 times [2021-07-13 20:38:29,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:29,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742053085] [2021-07-13 20:38:29,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:29,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:29,672 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 20:38:29,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:29,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742053085] [2021-07-13 20:38:29,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742053085] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:29,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269228522] [2021-07-13 20:38:29,672 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 20:38:29,716 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:38:29,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:29,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:38:29,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:29,775 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 20:38:29,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269228522] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:29,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:29,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:38:29,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993685242] [2021-07-13 20:38:29,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:38:29,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:29,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:38:29,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:38:29,776 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 20:38:30,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:30,066 INFO L93 Difference]: Finished difference Result 2097 states and 6377 transitions. [2021-07-13 20:38:30,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:38:30,067 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 20:38:30,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:30,070 INFO L225 Difference]: With dead ends: 2097 [2021-07-13 20:38:30,070 INFO L226 Difference]: Without dead ends: 2097 [2021-07-13 20:38:30,070 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 184.2ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:38:30,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-07-13 20:38:30,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1047. [2021-07-13 20:38:30,086 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 20:38:30,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3534 transitions. [2021-07-13 20:38:30,088 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3534 transitions. Word has length 24 [2021-07-13 20:38:30,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:30,088 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3534 transitions. [2021-07-13 20:38:30,089 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 20:38:30,089 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3534 transitions. [2021-07-13 20:38:30,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:38:30,090 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:30,090 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 20:38:30,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:30,306 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:30,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:30,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1073569087, now seen corresponding path program 31 times [2021-07-13 20:38:30,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:30,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854250769] [2021-07-13 20:38:30,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:30,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:30,351 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 20:38:30,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:30,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854250769] [2021-07-13 20:38:30,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854250769] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:30,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663519641] [2021-07-13 20:38:30,352 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 20:38:30,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:30,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:38:30,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:30,440 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 20:38:30,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663519641] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:30,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:30,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:38:30,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528020443] [2021-07-13 20:38:30,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:38:30,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:30,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:38:30,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:38:30,441 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 20:38:30,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:30,677 INFO L93 Difference]: Finished difference Result 1963 states and 6051 transitions. [2021-07-13 20:38:30,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:38:30,677 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 20:38:30,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:30,680 INFO L225 Difference]: With dead ends: 1963 [2021-07-13 20:38:30,680 INFO L226 Difference]: Without dead ends: 1959 [2021-07-13 20:38:30,680 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 127.9ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:38:30,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-07-13 20:38:30,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1047. [2021-07-13 20:38:30,696 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 20:38:30,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3532 transitions. [2021-07-13 20:38:30,698 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3532 transitions. Word has length 24 [2021-07-13 20:38:30,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:30,698 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3532 transitions. [2021-07-13 20:38:30,698 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 20:38:30,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3532 transitions. [2021-07-13 20:38:30,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:38:30,699 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:30,699 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 20:38:30,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-07-13 20:38:30,915 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:30,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:30,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1960561683, now seen corresponding path program 32 times [2021-07-13 20:38:30,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:30,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875135031] [2021-07-13 20:38:30,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:30,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:30,940 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 20:38:30,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:30,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875135031] [2021-07-13 20:38:30,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875135031] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:30,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850242076] [2021-07-13 20:38:30,940 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 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 20:38:30,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:38:30,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:30,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:38:30,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:31,018 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 20:38:31,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850242076] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:31,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:31,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:38:31,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305375135] [2021-07-13 20:38:31,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:38:31,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:31,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:38:31,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:38:31,021 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 20:38:31,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:31,228 INFO L93 Difference]: Finished difference Result 1728 states and 5494 transitions. [2021-07-13 20:38:31,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:38:31,229 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 20:38:31,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:31,231 INFO L225 Difference]: With dead ends: 1728 [2021-07-13 20:38:31,231 INFO L226 Difference]: Without dead ends: 1716 [2021-07-13 20:38:31,231 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 96.4ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:38:31,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-07-13 20:38:31,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1047. [2021-07-13 20:38:31,245 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 20:38:31,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3528 transitions. [2021-07-13 20:38:31,247 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3528 transitions. Word has length 24 [2021-07-13 20:38:31,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:31,247 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3528 transitions. [2021-07-13 20:38:31,247 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 20:38:31,247 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3528 transitions. [2021-07-13 20:38:31,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:38:31,249 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:31,249 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 20:38:31,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:31,465 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:31,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:31,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1288275347, now seen corresponding path program 33 times [2021-07-13 20:38:31,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:31,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150715976] [2021-07-13 20:38:31,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:31,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:31,500 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 20:38:31,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:31,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150715976] [2021-07-13 20:38:31,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150715976] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:31,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353789638] [2021-07-13 20:38:31,500 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 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 20:38:31,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:38:31,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:31,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:38:31,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:31,596 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 20:38:31,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353789638] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:31,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:31,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:38:31,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803725470] [2021-07-13 20:38:31,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:38:31,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:31,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:38:31,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:38:31,598 INFO L87 Difference]: Start difference. First operand 1047 states and 3528 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 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 20:38:31,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:31,911 INFO L93 Difference]: Finished difference Result 1821 states and 5719 transitions. [2021-07-13 20:38:31,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:38:31,911 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:38:31,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:31,914 INFO L225 Difference]: With dead ends: 1821 [2021-07-13 20:38:31,914 INFO L226 Difference]: Without dead ends: 1821 [2021-07-13 20:38:31,914 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 210.0ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:38:31,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-07-13 20:38:31,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1119. [2021-07-13 20:38:31,931 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 20:38:31,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3768 transitions. [2021-07-13 20:38:31,933 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3768 transitions. Word has length 24 [2021-07-13 20:38:31,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:31,933 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3768 transitions. [2021-07-13 20:38:31,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 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 20:38:31,933 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3768 transitions. [2021-07-13 20:38:31,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:38:31,935 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:31,935 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 20:38:32,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-07-13 20:38:32,152 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:32,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:32,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1951314555, now seen corresponding path program 34 times [2021-07-13 20:38:32,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:32,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624466433] [2021-07-13 20:38:32,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:32,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:32,179 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 20:38:32,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:32,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624466433] [2021-07-13 20:38:32,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624466433] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:32,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777926868] [2021-07-13 20:38:32,179 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 20:38:32,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:38:32,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:32,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:38:32,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:32,263 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 20:38:32,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777926868] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:32,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:32,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:38:32,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516100601] [2021-07-13 20:38:32,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:38:32,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:32,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:38:32,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:38:32,264 INFO L87 Difference]: Start difference. First operand 1119 states and 3768 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 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 20:38:32,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:32,531 INFO L93 Difference]: Finished difference Result 1790 states and 5648 transitions. [2021-07-13 20:38:32,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:38:32,531 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:38:32,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:32,534 INFO L225 Difference]: With dead ends: 1790 [2021-07-13 20:38:32,534 INFO L226 Difference]: Without dead ends: 1786 [2021-07-13 20:38:32,534 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 146.1ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:38:32,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-07-13 20:38:32,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1119. [2021-07-13 20:38:32,551 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 20:38:32,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3766 transitions. [2021-07-13 20:38:32,553 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3766 transitions. Word has length 24 [2021-07-13 20:38:32,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:32,553 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3766 transitions. [2021-07-13 20:38:32,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 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 20:38:32,553 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3766 transitions. [2021-07-13 20:38:32,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:38:32,555 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:32,555 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 20:38:32,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:32,769 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:32,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:32,769 INFO L82 PathProgramCache]: Analyzing trace with hash -860517803, now seen corresponding path program 35 times [2021-07-13 20:38:32,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:32,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812733200] [2021-07-13 20:38:32,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:32,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:32,801 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 20:38:32,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:32,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812733200] [2021-07-13 20:38:32,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812733200] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:32,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503916722] [2021-07-13 20:38:32,802 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 20:38:32,825 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:38:32,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:32,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:38:32,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:32,877 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 20:38:32,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503916722] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:32,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:32,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:38:32,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548477631] [2021-07-13 20:38:32,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:38:32,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:32,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:38:32,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:38:32,878 INFO L87 Difference]: Start difference. First operand 1119 states and 3766 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 20:38:33,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:33,028 INFO L93 Difference]: Finished difference Result 1649 states and 5332 transitions. [2021-07-13 20:38:33,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:38:33,028 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 24 [2021-07-13 20:38:33,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:33,030 INFO L225 Difference]: With dead ends: 1649 [2021-07-13 20:38:33,030 INFO L226 Difference]: Without dead ends: 1637 [2021-07-13 20:38:33,031 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 84.6ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:38:33,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-07-13 20:38:33,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1119. [2021-07-13 20:38:33,045 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 20:38:33,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3762 transitions. [2021-07-13 20:38:33,047 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3762 transitions. Word has length 24 [2021-07-13 20:38:33,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:33,047 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3762 transitions. [2021-07-13 20:38:33,047 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 20:38:33,047 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3762 transitions. [2021-07-13 20:38:33,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:38:33,049 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:33,049 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 20:38:33,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:33,249 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:33,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:33,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1270661831, now seen corresponding path program 4 times [2021-07-13 20:38:33,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:33,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518578487] [2021-07-13 20:38:33,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:33,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:33,675 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 72 [2021-07-13 20:38:33,866 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2021-07-13 20:38:34,048 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2021-07-13 20:38:34,225 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-07-13 20:38:34,357 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 40 [2021-07-13 20:38:34,398 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 20:38:34,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:34,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518578487] [2021-07-13 20:38:34,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518578487] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:34,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195642539] [2021-07-13 20:38:34,399 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 20:38:34,477 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:38:34,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:34,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:38:34,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:34,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:34,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 16 [2021-07-13 20:38:34,920 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:34,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:34,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 16 [2021-07-13 20:38:34,928 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:34,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:34,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 35 treesize of output 21 [2021-07-13 20:38:34,933 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:34,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:34,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 18 [2021-07-13 20:38:34,939 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:34,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:34,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,945 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-07-13 20:38:34,946 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:34,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:34,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16 [2021-07-13 20:38:34,953 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:34,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:34,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 22 [2021-07-13 20:38:34,958 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:34,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:34,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,963 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2021-07-13 20:38:34,964 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:34,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:34,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 10 [2021-07-13 20:38:34,969 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:34,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:34,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 35 treesize of output 21 [2021-07-13 20:38:34,976 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:34,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:34,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 41 treesize of output 22 [2021-07-13 20:38:34,982 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:34,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:34,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 44 treesize of output 26 [2021-07-13 20:38:34,988 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:34,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:34,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,993 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 30 treesize of output 18 [2021-07-13 20:38:34,994 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:34,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:34,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:34,999 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 36 treesize of output 22 [2021-07-13 20:38:34,999 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:35,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:35,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:35,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:35,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 16 [2021-07-13 20:38:35,006 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:35,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:35,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:35,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 39 treesize of output 23 [2021-07-13 20:38:35,010 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:35,071 INFO L628 ElimStorePlain]: treesize reduction 71, result has 48.2 percent of original size [2021-07-13 20:38:35,073 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:38:35,073 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:48 [2021-07-13 20:38:35,116 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 20:38:35,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195642539] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:35,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:35,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:38:35,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921777935] [2021-07-13 20:38:35,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:38:35,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:35,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:38:35,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:38:35,118 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 20:38:35,814 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2021-07-13 20:38:36,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:36,112 INFO L93 Difference]: Finished difference Result 1517 states and 4955 transitions. [2021-07-13 20:38:36,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:38:36,112 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 20:38:36,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:36,115 INFO L225 Difference]: With dead ends: 1517 [2021-07-13 20:38:36,115 INFO L226 Difference]: Without dead ends: 1502 [2021-07-13 20:38:36,115 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1758.8ms TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:38:36,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-07-13 20:38:36,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1141. [2021-07-13 20:38:36,128 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 20:38:36,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3833 transitions. [2021-07-13 20:38:36,130 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3833 transitions. Word has length 26 [2021-07-13 20:38:36,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:36,130 INFO L482 AbstractCegarLoop]: Abstraction has 1141 states and 3833 transitions. [2021-07-13 20:38:36,130 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 20:38:36,130 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3833 transitions. [2021-07-13 20:38:36,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:38:36,132 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:36,132 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 20:38:36,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:36,347 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:36,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:36,348 INFO L82 PathProgramCache]: Analyzing trace with hash -757736185, now seen corresponding path program 5 times [2021-07-13 20:38:36,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:36,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963974989] [2021-07-13 20:38:36,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:36,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:36,679 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-07-13 20:38:36,984 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 20:38:36,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:36,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963974989] [2021-07-13 20:38:36,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963974989] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:36,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019088907] [2021-07-13 20:38:36,985 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 20:38:37,010 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:38:37,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:37,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:38:37,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:37,472 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2021-07-13 20:38:37,515 INFO L446 ElimStorePlain]: Different costs {2=[A, v_prenex_5], 3=[v_prenex_9, v_prenex_7]} [2021-07-13 20:38:37,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:37,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:37,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:37,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 18 [2021-07-13 20:38:37,523 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:37,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:37,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:37,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 15 [2021-07-13 20:38:37,529 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:37,640 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2021-07-13 20:38:37,640 INFO L628 ElimStorePlain]: treesize reduction 73, result has 74.2 percent of original size [2021-07-13 20:38:37,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:37,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:37,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 20 [2021-07-13 20:38:37,646 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:37,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:37,699 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-07-13 20:38:37,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 54 [2021-07-13 20:38:37,701 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:37,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:37,746 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-07-13 20:38:37,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 42 [2021-07-13 20:38:37,747 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:37,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:37,782 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 20:38:37,782 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:322, output treesize:59 [2021-07-13 20:38:37,853 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 20:38:37,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019088907] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:37,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:37,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:38:37,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792582871] [2021-07-13 20:38:37,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:38:37,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:37,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:38:37,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:38:37,854 INFO L87 Difference]: Start difference. First operand 1141 states and 3833 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 20:38:38,449 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 69 [2021-07-13 20:38:38,674 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2021-07-13 20:38:38,846 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 67 [2021-07-13 20:38:38,979 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-07-13 20:38:39,155 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 66 [2021-07-13 20:38:39,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:39,518 INFO L93 Difference]: Finished difference Result 1563 states and 5076 transitions. [2021-07-13 20:38:39,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:38:39,518 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 20:38:39,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:39,520 INFO L225 Difference]: With dead ends: 1563 [2021-07-13 20:38:39,521 INFO L226 Difference]: Without dead ends: 1533 [2021-07-13 20:38:39,521 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 2184.9ms TimeCoverageRelationStatistics Valid=206, Invalid=984, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:38:39,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1533 states. [2021-07-13 20:38:39,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1533 to 1150. [2021-07-13 20:38:39,534 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 20:38:39,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 3857 transitions. [2021-07-13 20:38:39,536 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 3857 transitions. Word has length 26 [2021-07-13 20:38:39,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:39,536 INFO L482 AbstractCegarLoop]: Abstraction has 1150 states and 3857 transitions. [2021-07-13 20:38:39,536 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 20:38:39,536 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 3857 transitions. [2021-07-13 20:38:39,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:38:39,538 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:39,538 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 20:38:39,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:39,754 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:39,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:39,754 INFO L82 PathProgramCache]: Analyzing trace with hash 833693123, now seen corresponding path program 36 times [2021-07-13 20:38:39,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:39,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118105836] [2021-07-13 20:38:39,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:39,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:40,213 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 20:38:40,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:40,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118105836] [2021-07-13 20:38:40,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118105836] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:40,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291589336] [2021-07-13 20:38:40,213 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 20:38:40,275 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:38:40,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:40,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:38:40,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:40,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:40,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:40,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:40,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:40,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:40,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:40,877 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 40 treesize of output 20 [2021-07-13 20:38:40,878 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:40,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:40,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:40,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:40,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:40,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:40,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:40,885 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 55 treesize of output 24 [2021-07-13 20:38:40,886 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:40,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:40,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:40,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:40,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:40,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:40,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:40,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 25 [2021-07-13 20:38:40,893 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:40,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:40,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:40,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:40,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:40,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:40,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:40,900 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 64 treesize of output 24 [2021-07-13 20:38:40,901 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:40,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:40,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:40,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:40,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:40,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:40,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:40,908 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 44 treesize of output 14 [2021-07-13 20:38:40,909 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:40,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:40,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:40,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:40,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:40,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:40,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:40,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 28 [2021-07-13 20:38:40,916 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:40,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:40,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:40,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:40,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:40,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:40,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:40,923 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 43 treesize of output 23 [2021-07-13 20:38:40,924 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:40,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:40,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:40,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:40,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:40,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:40,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:40,931 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 20 [2021-07-13 20:38:40,931 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:40,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:40,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:40,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:40,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:40,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:40,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:40,938 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 18 [2021-07-13 20:38:40,939 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:40,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:40,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:40,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:40,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:40,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:40,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:40,945 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 18 [2021-07-13 20:38:40,946 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:40,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:40,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:40,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:40,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:40,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:40,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:40,953 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 53 treesize of output 24 [2021-07-13 20:38:40,954 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:40,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:40,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:40,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:40,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:40,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:40,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:40,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 23 [2021-07-13 20:38:40,962 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:40,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:40,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:40,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:40,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:40,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:40,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:40,970 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 52 treesize of output 28 [2021-07-13 20:38:40,971 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:40,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:40,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:40,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:40,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:40,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:40,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:40,977 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 34 treesize of output 12 [2021-07-13 20:38:40,993 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:40,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:40,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:40,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:40,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:41,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:41,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:41,000 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 25 [2021-07-13 20:38:41,001 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:41,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:41,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:41,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:41,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:41,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 18 [2021-07-13 20:38:41,006 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:41,028 INFO L628 ElimStorePlain]: treesize reduction 60, result has 24.1 percent of original size [2021-07-13 20:38:41,029 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:38:41,029 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:937, output treesize:13 [2021-07-13 20:38:41,054 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 20:38:41,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291589336] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:41,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:41,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-07-13 20:38:41,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501326722] [2021-07-13 20:38:41,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:38:41,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:41,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:38:41,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:38:41,055 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 20:38:41,708 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 70 [2021-07-13 20:38:42,310 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 60 [2021-07-13 20:38:42,595 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 73 [2021-07-13 20:38:42,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:42,987 INFO L93 Difference]: Finished difference Result 1615 states and 5216 transitions. [2021-07-13 20:38:42,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:38:42,987 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 20:38:42,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:42,990 INFO L225 Difference]: With dead ends: 1615 [2021-07-13 20:38:42,990 INFO L226 Difference]: Without dead ends: 1600 [2021-07-13 20:38:42,990 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 2096.5ms TimeCoverageRelationStatistics Valid=234, Invalid=1098, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:38:42,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1600 states. [2021-07-13 20:38:43,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1600 to 1180. [2021-07-13 20:38:43,004 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 20:38:43,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3939 transitions. [2021-07-13 20:38:43,006 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3939 transitions. Word has length 26 [2021-07-13 20:38:43,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:43,006 INFO L482 AbstractCegarLoop]: Abstraction has 1180 states and 3939 transitions. [2021-07-13 20:38:43,006 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 20:38:43,006 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3939 transitions. [2021-07-13 20:38:43,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:38:43,008 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:43,008 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 20:38:43,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-07-13 20:38:43,224 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:43,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:43,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1638740299, now seen corresponding path program 6 times [2021-07-13 20:38:43,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:43,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481589186] [2021-07-13 20:38:43,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:43,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:43,783 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 20:38:43,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:43,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481589186] [2021-07-13 20:38:43,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481589186] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:43,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188968523] [2021-07-13 20:38:43,784 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 20:38:43,809 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:38:43,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:43,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:38:43,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:44,207 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-07-13 20:38:44,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:44,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:44,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 16 [2021-07-13 20:38:44,271 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:44,404 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-07-13 20:38:44,404 INFO L628 ElimStorePlain]: treesize reduction 65, result has 72.6 percent of original size [2021-07-13 20:38:44,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:44,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:44,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:44,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 15 [2021-07-13 20:38:44,411 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:44,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:44,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-07-13 20:38:44,415 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:44,495 INFO L628 ElimStorePlain]: treesize reduction 19, result has 86.8 percent of original size [2021-07-13 20:38:44,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:44,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:44,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 20 [2021-07-13 20:38:44,501 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:44,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:44,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:44,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:44,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 35 treesize of output 21 [2021-07-13 20:38:44,541 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:44,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:44,576 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 20:38:44,576 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:253, output treesize:59 [2021-07-13 20:38:44,643 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 20:38:44,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188968523] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:44,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:44,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:38:44,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88196099] [2021-07-13 20:38:44,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:38:44,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:44,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:38:44,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:38:44,644 INFO L87 Difference]: Start difference. First operand 1180 states and 3939 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 20:38:44,824 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 38 [2021-07-13 20:38:45,554 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2021-07-13 20:38:45,815 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2021-07-13 20:38:45,968 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 72 [2021-07-13 20:38:46,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:46,036 INFO L93 Difference]: Finished difference Result 1620 states and 5225 transitions. [2021-07-13 20:38:46,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:38:46,036 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 20:38:46,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:46,038 INFO L225 Difference]: With dead ends: 1620 [2021-07-13 20:38:46,038 INFO L226 Difference]: Without dead ends: 1605 [2021-07-13 20:38:46,039 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 1851.9ms TimeCoverageRelationStatistics Valid=190, Invalid=740, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:38:46,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-07-13 20:38:46,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 1189. [2021-07-13 20:38:46,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 1188 states have (on average 3.3383838383838382) internal successors, (3966), 1188 states have internal predecessors, (3966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:46,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 3966 transitions. [2021-07-13 20:38:46,054 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 3966 transitions. Word has length 26 [2021-07-13 20:38:46,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:46,054 INFO L482 AbstractCegarLoop]: Abstraction has 1189 states and 3966 transitions. [2021-07-13 20:38:46,054 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 20:38:46,055 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 3966 transitions. [2021-07-13 20:38:46,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:38:46,056 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:46,056 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 20:38:46,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:46,272 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:46,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:46,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1105845433, now seen corresponding path program 37 times [2021-07-13 20:38:46,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:46,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713920408] [2021-07-13 20:38:46,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:46,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:46,734 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 20:38:46,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:46,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713920408] [2021-07-13 20:38:46,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713920408] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:46,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263337535] [2021-07-13 20:38:46,734 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 20:38:46,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:46,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:38:46,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:47,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:47,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:47,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:47,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:47,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:47,320 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 44 treesize of output 14 [2021-07-13 20:38:47,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:47,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:47,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:47,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:47,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:47,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:47,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:47,327 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 12 [2021-07-13 20:38:47,328 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:47,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:47,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:47,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:47,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:47,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:47,335 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 53 treesize of output 24 [2021-07-13 20:38:47,335 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:47,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:47,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:47,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:47,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:47,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:47,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:47,343 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 23 [2021-07-13 20:38:47,343 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:47,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:47,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:47,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:47,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:47,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:47,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:47,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 28 [2021-07-13 20:38:47,351 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:47,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:47,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:47,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:47,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:47,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:47,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:47,358 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 55 treesize of output 24 [2021-07-13 20:38:47,359 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:47,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:47,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:47,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:47,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:47,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:47,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:47,366 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 25 [2021-07-13 20:38:47,366 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:47,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:47,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:47,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:47,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:47,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:47,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:47,373 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 64 treesize of output 24 [2021-07-13 20:38:47,374 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:47,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:47,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:47,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:47,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:47,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:47,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:47,381 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 20 [2021-07-13 20:38:47,382 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:47,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:47,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:47,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:47,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:47,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:47,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:47,389 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 18 [2021-07-13 20:38:47,389 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:47,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:47,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:47,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:47,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:47,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:47,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:47,396 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 52 treesize of output 28 [2021-07-13 20:38:47,397 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:47,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:47,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:47,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:47,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:47,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:47,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:47,403 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 51 treesize of output 25 [2021-07-13 20:38:47,404 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:47,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:47,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:47,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:47,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:47,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:47,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:47,411 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 44 treesize of output 18 [2021-07-13 20:38:47,411 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:47,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:47,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:47,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:47,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:47,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:47,417 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 23 [2021-07-13 20:38:47,418 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:47,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:47,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:47,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:47,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:47,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:47,423 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 40 treesize of output 20 [2021-07-13 20:38:47,424 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:47,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:47,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:47,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:47,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:47,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 18 [2021-07-13 20:38:47,428 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:47,463 INFO L628 ElimStorePlain]: treesize reduction 40, result has 49.4 percent of original size [2021-07-13 20:38:47,464 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 20:38:47,465 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:937, output treesize:27 [2021-07-13 20:38:47,500 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 20:38:47,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263337535] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:47,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:47,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-13 20:38:47,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626427447] [2021-07-13 20:38:47,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:38:47,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:47,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:38:47,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:38:47,501 INFO L87 Difference]: Start difference. First operand 1189 states and 3966 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 20:38:48,768 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 65 [2021-07-13 20:38:49,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:49,549 INFO L93 Difference]: Finished difference Result 1800 states and 5747 transitions. [2021-07-13 20:38:49,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:38:49,549 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 20:38:49,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:49,552 INFO L225 Difference]: With dead ends: 1800 [2021-07-13 20:38:49,552 INFO L226 Difference]: Without dead ends: 1785 [2021-07-13 20:38:49,552 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 2228.1ms TimeCoverageRelationStatistics Valid=311, Invalid=1329, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:38:49,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1785 states. [2021-07-13 20:38:49,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1785 to 1201. [2021-07-13 20:38:49,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1201 states, 1200 states have (on average 3.3466666666666667) internal successors, (4016), 1200 states have internal predecessors, (4016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:49,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 4016 transitions. [2021-07-13 20:38:49,568 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 4016 transitions. Word has length 26 [2021-07-13 20:38:49,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:49,569 INFO L482 AbstractCegarLoop]: Abstraction has 1201 states and 4016 transitions. [2021-07-13 20:38:49,569 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 20:38:49,569 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 4016 transitions. [2021-07-13 20:38:49,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:38:49,570 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:49,570 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 20:38:49,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-07-13 20:38:49,786 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:49,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:49,786 INFO L82 PathProgramCache]: Analyzing trace with hash -2082164277, now seen corresponding path program 38 times [2021-07-13 20:38:49,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:49,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37352145] [2021-07-13 20:38:49,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:49,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:50,147 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2021-07-13 20:38:50,261 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2021-07-13 20:38:50,399 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 20:38:50,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:50,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37352145] [2021-07-13 20:38:50,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37352145] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:50,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542224783] [2021-07-13 20:38:50,400 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 20:38:50,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:38:50,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:50,429 WARN L261 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 20:38:50,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:50,865 INFO L354 Elim1Store]: treesize reduction 18, result has 61.7 percent of original size [2021-07-13 20:38:50,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 48 [2021-07-13 20:38:50,877 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:50,918 INFO L354 Elim1Store]: treesize reduction 18, result has 61.7 percent of original size [2021-07-13 20:38:50,918 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 45 treesize of output 51 [2021-07-13 20:38:50,926 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:50,971 INFO L354 Elim1Store]: treesize reduction 14, result has 70.2 percent of original size [2021-07-13 20:38:50,971 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 51 treesize of output 59 [2021-07-13 20:38:50,988 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:51,029 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-07-13 20:38:51,029 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 41 [2021-07-13 20:38:51,031 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:51,071 INFO L354 Elim1Store]: treesize reduction 23, result has 51.1 percent of original size [2021-07-13 20:38:51,071 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 41 [2021-07-13 20:38:51,078 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-07-13 20:38:51,099 INFO L354 Elim1Store]: treesize reduction 46, result has 2.1 percent of original size [2021-07-13 20:38:51,100 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 1 [2021-07-13 20:38:51,100 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:51,154 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-07-13 20:38:51,154 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 62 treesize of output 68 [2021-07-13 20:38:51,187 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:51,231 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-07-13 20:38:51,231 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 54 treesize of output 44 [2021-07-13 20:38:51,232 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:51,269 INFO L354 Elim1Store]: treesize reduction 34, result has 27.7 percent of original size [2021-07-13 20:38:51,270 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 34 [2021-07-13 20:38:51,271 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:51,336 INFO L354 Elim1Store]: treesize reduction 18, result has 61.7 percent of original size [2021-07-13 20:38:51,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 52 [2021-07-13 20:38:51,339 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:51,360 INFO L354 Elim1Store]: treesize reduction 46, result has 2.1 percent of original size [2021-07-13 20:38:51,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 41 treesize of output 1 [2021-07-13 20:38:51,361 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:51,382 INFO L354 Elim1Store]: treesize reduction 46, result has 2.1 percent of original size [2021-07-13 20:38:51,382 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 49 treesize of output 1 [2021-07-13 20:38:51,382 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:51,426 INFO L354 Elim1Store]: treesize reduction 23, result has 51.1 percent of original size [2021-07-13 20:38:51,426 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 43 treesize of output 46 [2021-07-13 20:38:51,429 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:51,467 INFO L354 Elim1Store]: treesize reduction 34, result has 27.7 percent of original size [2021-07-13 20:38:51,467 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 33 [2021-07-13 20:38:51,469 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:51,491 INFO L354 Elim1Store]: treesize reduction 46, result has 2.1 percent of original size [2021-07-13 20:38:51,491 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 53 treesize of output 1 [2021-07-13 20:38:51,491 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:51,530 INFO L354 Elim1Store]: treesize reduction 14, result has 70.2 percent of original size [2021-07-13 20:38:51,530 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 54 treesize of output 60 [2021-07-13 20:38:51,538 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:52,147 WARN L205 SmtUtils]: Spent 608.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 81 [2021-07-13 20:38:52,147 INFO L628 ElimStorePlain]: treesize reduction 384, result has 51.8 percent of original size [2021-07-13 20:38:52,152 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:38:52,153 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:1105, output treesize:413 [2021-07-13 20:38:52,372 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-07-13 20:38:52,595 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 20:38:52,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542224783] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:52,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:52,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-13 20:38:52,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445397097] [2021-07-13 20:38:52,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:38:52,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:52,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:38:52,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:38:52,596 INFO L87 Difference]: Start difference. First operand 1201 states and 4016 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 20:38:53,052 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2021-07-13 20:38:53,614 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2021-07-13 20:38:53,855 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 70 [2021-07-13 20:38:54,993 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 64 [2021-07-13 20:38:55,151 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2021-07-13 20:38:55,420 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 54 [2021-07-13 20:38:55,907 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 83 [2021-07-13 20:38:56,365 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 87 [2021-07-13 20:38:56,697 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 84 [2021-07-13 20:38:56,943 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2021-07-13 20:38:57,487 WARN L205 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 118 [2021-07-13 20:38:58,121 WARN L205 SmtUtils]: Spent 544.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 107 [2021-07-13 20:38:58,602 WARN L205 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 117 [2021-07-13 20:38:59,128 WARN L205 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 97 [2021-07-13 20:38:59,775 WARN L205 SmtUtils]: Spent 528.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 105 [2021-07-13 20:38:59,962 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2021-07-13 20:39:00,162 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2021-07-13 20:39:00,359 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2021-07-13 20:39:00,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:00,486 INFO L93 Difference]: Finished difference Result 2410 states and 7510 transitions. [2021-07-13 20:39:00,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-13 20:39:00,486 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 20:39:00,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:00,490 INFO L225 Difference]: With dead ends: 2410 [2021-07-13 20:39:00,490 INFO L226 Difference]: Without dead ends: 2365 [2021-07-13 20:39:00,491 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1382 ImplicationChecksByTransitivity, 8028.1ms TimeCoverageRelationStatistics Valid=726, Invalid=3966, Unknown=0, NotChecked=0, Total=4692 [2021-07-13 20:39:00,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2365 states. [2021-07-13 20:39:00,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2365 to 1341. [2021-07-13 20:39:00,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1341 states, 1340 states have (on average 3.3007462686567166) internal successors, (4423), 1340 states have internal predecessors, (4423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:00,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1341 states to 1341 states and 4423 transitions. [2021-07-13 20:39:00,511 INFO L78 Accepts]: Start accepts. Automaton has 1341 states and 4423 transitions. Word has length 26 [2021-07-13 20:39:00,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:00,511 INFO L482 AbstractCegarLoop]: Abstraction has 1341 states and 4423 transitions. [2021-07-13 20:39:00,511 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 20:39:00,511 INFO L276 IsEmpty]: Start isEmpty. Operand 1341 states and 4423 transitions. [2021-07-13 20:39:00,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:39:00,513 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:00,513 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 20:39:00,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:00,728 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:00,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:00,729 INFO L82 PathProgramCache]: Analyzing trace with hash 127735791, now seen corresponding path program 7 times [2021-07-13 20:39:00,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:00,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698965539] [2021-07-13 20:39:00,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:00,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:01,029 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 72 [2021-07-13 20:39:01,241 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2021-07-13 20:39:01,419 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2021-07-13 20:39:01,592 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-07-13 20:39:01,754 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 20:39:01,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:01,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698965539] [2021-07-13 20:39:01,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698965539] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:01,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127407593] [2021-07-13 20:39:01,754 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 20:39:01,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:01,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:39:01,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:02,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:02,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:02,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:02,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 39 treesize of output 23 [2021-07-13 20:39:02,169 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:02,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:02,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:02,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:02,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 39 treesize of output 23 [2021-07-13 20:39:02,175 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:02,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:02,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:02,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:02,179 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 31 treesize of output 16 [2021-07-13 20:39:02,181 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:02,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:02,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:02,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:02,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 16 [2021-07-13 20:39:02,186 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:02,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:02,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:02,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:02,191 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 35 treesize of output 21 [2021-07-13 20:39:02,192 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:02,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:02,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:02,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:02,197 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 31 treesize of output 16 [2021-07-13 20:39:02,197 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:02,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:02,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:02,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:02,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 44 treesize of output 26 [2021-07-13 20:39:02,204 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:02,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:02,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:02,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:02,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 18 [2021-07-13 20:39:02,210 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:02,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:02,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:02,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:02,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 18 [2021-07-13 20:39:02,215 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:02,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:02,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:02,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:02,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 22 [2021-07-13 20:39:02,221 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:02,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:02,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:02,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:02,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 10 [2021-07-13 20:39:02,226 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:02,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:02,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:02,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:02,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 44 treesize of output 26 [2021-07-13 20:39:02,234 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:02,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:02,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:02,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:02,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 35 treesize of output 21 [2021-07-13 20:39:02,239 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:02,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:02,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:02,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:02,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 22 [2021-07-13 20:39:02,245 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:02,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:02,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:02,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:02,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 16 [2021-07-13 20:39:02,250 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:02,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:02,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:02,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 41 treesize of output 22 [2021-07-13 20:39:02,254 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:02,316 INFO L628 ElimStorePlain]: treesize reduction 73, result has 46.7 percent of original size [2021-07-13 20:39:02,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:39:02,318 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:46 [2021-07-13 20:39:02,384 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 20:39:02,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127407593] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:02,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:02,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:39:02,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567670840] [2021-07-13 20:39:02,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:39:02,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:02,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:39:02,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:39:02,385 INFO L87 Difference]: Start difference. First operand 1341 states and 4423 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 20:39:03,010 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 66 [2021-07-13 20:39:03,239 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2021-07-13 20:39:03,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:03,508 INFO L93 Difference]: Finished difference Result 1736 states and 5612 transitions. [2021-07-13 20:39:03,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:39:03,508 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 20:39:03,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:03,512 INFO L225 Difference]: With dead ends: 1736 [2021-07-13 20:39:03,512 INFO L226 Difference]: Without dead ends: 1721 [2021-07-13 20:39:03,512 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1935.9ms TimeCoverageRelationStatistics Valid=171, Invalid=641, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:39:03,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1721 states. [2021-07-13 20:39:03,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1721 to 1352. [2021-07-13 20:39:03,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1352 states, 1351 states have (on average 3.298297557364915) internal successors, (4456), 1351 states have internal predecessors, (4456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:03,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 4456 transitions. [2021-07-13 20:39:03,530 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 4456 transitions. Word has length 26 [2021-07-13 20:39:03,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:03,530 INFO L482 AbstractCegarLoop]: Abstraction has 1352 states and 4456 transitions. [2021-07-13 20:39:03,530 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 20:39:03,530 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 4456 transitions. [2021-07-13 20:39:03,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:39:03,532 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:03,532 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 20:39:03,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable413 [2021-07-13 20:39:03,748 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:03,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:03,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1900662225, now seen corresponding path program 8 times [2021-07-13 20:39:03,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:03,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049093563] [2021-07-13 20:39:03,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:03,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:04,038 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-07-13 20:39:04,268 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-07-13 20:39:04,361 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 20:39:04,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:04,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049093563] [2021-07-13 20:39:04,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049093563] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:04,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614449666] [2021-07-13 20:39:04,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:39:04,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:39:04,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:04,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:39:04,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:04,731 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-07-13 20:39:04,817 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-07-13 20:39:04,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 63 [2021-07-13 20:39:04,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:04,976 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2021-07-13 20:39:04,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:04,999 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-07-13 20:39:05,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 108 treesize of output 75 [2021-07-13 20:39:05,001 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:05,160 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2021-07-13 20:39:05,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:05,182 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-07-13 20:39:05,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 108 treesize of output 71 [2021-07-13 20:39:05,184 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:05,340 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-07-13 20:39:05,341 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:05,359 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-07-13 20:39:05,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 49 [2021-07-13 20:39:05,361 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:05,514 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2021-07-13 20:39:05,514 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:05,534 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-07-13 20:39:05,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 56 [2021-07-13 20:39:05,535 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:05,678 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2021-07-13 20:39:05,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:05,695 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-07-13 20:39:05,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 57 [2021-07-13 20:39:05,726 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:06,051 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 127 [2021-07-13 20:39:06,052 INFO L628 ElimStorePlain]: treesize reduction 16, result has 96.2 percent of original size [2021-07-13 20:39:06,070 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-07-13 20:39:06,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 56 [2021-07-13 20:39:06,073 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:06,334 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 113 [2021-07-13 20:39:06,335 INFO L628 ElimStorePlain]: treesize reduction 8, result has 97.8 percent of original size [2021-07-13 20:39:06,354 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-07-13 20:39:06,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 63 [2021-07-13 20:39:06,356 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:06,484 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-07-13 20:39:06,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:06,500 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 20:39:06,500 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:743, output treesize:480 [2021-07-13 20:39:06,747 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2021-07-13 20:39:06,899 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 20:39:06,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614449666] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:06,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:06,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:39:06,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572461804] [2021-07-13 20:39:06,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:39:06,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:06,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:39:06,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:39:06,900 INFO L87 Difference]: Start difference. First operand 1352 states and 4456 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 20:39:07,635 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 67 [2021-07-13 20:39:08,078 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 67 [2021-07-13 20:39:08,232 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2021-07-13 20:39:08,427 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 72 [2021-07-13 20:39:08,764 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 70 [2021-07-13 20:39:08,928 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2021-07-13 20:39:09,125 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 70 [2021-07-13 20:39:09,267 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2021-07-13 20:39:09,556 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2021-07-13 20:39:09,744 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-07-13 20:39:10,018 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2021-07-13 20:39:10,486 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 80 [2021-07-13 20:39:10,921 WARN L205 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 82 [2021-07-13 20:39:11,343 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 76 [2021-07-13 20:39:11,840 WARN L205 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2021-07-13 20:39:12,125 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-07-13 20:39:12,361 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2021-07-13 20:39:12,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:12,432 INFO L93 Difference]: Finished difference Result 2040 states and 6414 transitions. [2021-07-13 20:39:12,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:39:12,432 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 20:39:12,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:12,435 INFO L225 Difference]: With dead ends: 2040 [2021-07-13 20:39:12,435 INFO L226 Difference]: Without dead ends: 2025 [2021-07-13 20:39:12,436 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 5948.9ms TimeCoverageRelationStatistics Valid=332, Invalid=1648, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:39:12,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2025 states. [2021-07-13 20:39:12,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2025 to 1363. [2021-07-13 20:39:12,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1363 states, 1362 states have (on average 3.3069016152716593) internal successors, (4504), 1362 states have internal predecessors, (4504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:12,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 4504 transitions. [2021-07-13 20:39:12,455 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 4504 transitions. Word has length 26 [2021-07-13 20:39:12,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:12,456 INFO L482 AbstractCegarLoop]: Abstraction has 1363 states and 4504 transitions. [2021-07-13 20:39:12,456 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 20:39:12,456 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 4504 transitions. [2021-07-13 20:39:12,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:39:12,458 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:12,458 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 20:39:12,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable447 [2021-07-13 20:39:12,673 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:12,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:12,674 INFO L82 PathProgramCache]: Analyzing trace with hash 456895363, now seen corresponding path program 9 times [2021-07-13 20:39:12,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:12,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774770383] [2021-07-13 20:39:12,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:12,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:13,204 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 20:39:13,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:13,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774770383] [2021-07-13 20:39:13,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774770383] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:13,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147381286] [2021-07-13 20:39:13,205 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 20:39:13,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:39:13,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:13,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:39:13,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:13,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:13,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:13,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:13,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 35 treesize of output 21 [2021-07-13 20:39:13,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:13,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:13,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:13,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 18 [2021-07-13 20:39:13,911 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:14,129 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 67 [2021-07-13 20:39:14,129 INFO L628 ElimStorePlain]: treesize reduction 136, result has 57.9 percent of original size [2021-07-13 20:39:14,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:14,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:14,134 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-07-13 20:39:14,135 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:14,202 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:14,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:14,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:14,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16 [2021-07-13 20:39:14,208 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:14,272 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:14,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:14,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:14,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:14,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 35 treesize of output 21 [2021-07-13 20:39:14,280 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:14,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:14,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:14,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 20 [2021-07-13 20:39:14,286 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:14,338 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:14,341 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 20:39:14,341 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 12 variables, input treesize:361, output treesize:72 [2021-07-13 20:39:14,406 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 20:39:14,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147381286] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:14,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:14,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:39:14,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16439196] [2021-07-13 20:39:14,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:39:14,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:14,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:39:14,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:39:14,407 INFO L87 Difference]: Start difference. First operand 1363 states and 4504 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 20:39:15,192 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 70 [2021-07-13 20:39:15,366 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 50 [2021-07-13 20:39:15,643 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 62 [2021-07-13 20:39:16,002 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 78 [2021-07-13 20:39:16,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:16,149 INFO L93 Difference]: Finished difference Result 1593 states and 5152 transitions. [2021-07-13 20:39:16,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:39:16,149 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 20:39:16,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:16,152 INFO L225 Difference]: With dead ends: 1593 [2021-07-13 20:39:16,152 INFO L226 Difference]: Without dead ends: 1578 [2021-07-13 20:39:16,152 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 2152.4ms TimeCoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:39:16,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1578 states. [2021-07-13 20:39:16,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1578 to 1372. [2021-07-13 20:39:16,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1372 states, 1371 states have (on average 3.311451495258935) internal successors, (4540), 1371 states have internal predecessors, (4540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:16,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 4540 transitions. [2021-07-13 20:39:16,169 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 4540 transitions. Word has length 26 [2021-07-13 20:39:16,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:16,169 INFO L482 AbstractCegarLoop]: Abstraction has 1372 states and 4540 transitions. [2021-07-13 20:39:16,169 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 20:39:16,169 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 4540 transitions. [2021-07-13 20:39:16,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:39:16,171 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:16,171 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 20:39:16,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable469,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:16,387 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:16,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:16,387 INFO L82 PathProgramCache]: Analyzing trace with hash 289086271, now seen corresponding path program 10 times [2021-07-13 20:39:16,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:16,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051422324] [2021-07-13 20:39:16,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:16,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:16,895 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 61 [2021-07-13 20:39:17,102 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 75 [2021-07-13 20:39:17,246 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2021-07-13 20:39:17,501 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 20:39:17,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:17,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051422324] [2021-07-13 20:39:17,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051422324] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:17,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478942350] [2021-07-13 20:39:17,501 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 20:39:17,526 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:39:17,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:17,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:39:17,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:17,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:17,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:17,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:17,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 22 [2021-07-13 20:39:17,952 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:17,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:17,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:17,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:17,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 18 [2021-07-13 20:39:17,959 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:17,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:17,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:17,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:17,965 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 22 [2021-07-13 20:39:17,967 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:17,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:17,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:17,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:17,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 10 [2021-07-13 20:39:17,977 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:17,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:17,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:17,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:17,983 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-07-13 20:39:17,983 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:17,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:17,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:17,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:17,989 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 44 treesize of output 26 [2021-07-13 20:39:17,990 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:17,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:17,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:17,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:17,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 16 [2021-07-13 20:39:17,998 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:18,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:18,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:18,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:18,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 16 [2021-07-13 20:39:18,004 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:18,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:18,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:18,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:18,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 39 treesize of output 23 [2021-07-13 20:39:18,014 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:18,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:18,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:18,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:18,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 44 treesize of output 26 [2021-07-13 20:39:18,020 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:18,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:18,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:18,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:18,025 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-07-13 20:39:18,026 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:18,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:18,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:18,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:18,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 35 treesize of output 21 [2021-07-13 20:39:18,032 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:18,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:18,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:18,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:18,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 16 [2021-07-13 20:39:18,038 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:18,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:18,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:18,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:18,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 18 [2021-07-13 20:39:18,043 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:18,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:18,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:18,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:18,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 22 [2021-07-13 20:39:18,049 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:18,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:18,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:18,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 39 treesize of output 23 [2021-07-13 20:39:18,052 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:18,115 INFO L628 ElimStorePlain]: treesize reduction 73, result has 46.7 percent of original size [2021-07-13 20:39:18,116 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:39:18,116 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:46 [2021-07-13 20:39:18,165 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 20:39:18,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478942350] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:18,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:18,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:39:18,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770392749] [2021-07-13 20:39:18,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:39:18,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:18,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:39:18,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:39:18,166 INFO L87 Difference]: Start difference. First operand 1372 states and 4540 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 20:39:18,527 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 54 [2021-07-13 20:39:18,733 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2021-07-13 20:39:18,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:18,950 INFO L93 Difference]: Finished difference Result 1674 states and 5467 transitions. [2021-07-13 20:39:18,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:39:18,950 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 20:39:18,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:18,953 INFO L225 Difference]: With dead ends: 1674 [2021-07-13 20:39:18,953 INFO L226 Difference]: Without dead ends: 1659 [2021-07-13 20:39:18,954 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1682.2ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:39:18,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1659 states. [2021-07-13 20:39:18,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1659 to 1372. [2021-07-13 20:39:18,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1372 states, 1371 states have (on average 3.311451495258935) internal successors, (4540), 1371 states have internal predecessors, (4540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:18,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 4540 transitions. [2021-07-13 20:39:18,971 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 4540 transitions. Word has length 26 [2021-07-13 20:39:18,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:18,971 INFO L482 AbstractCegarLoop]: Abstraction has 1372 states and 4540 transitions. [2021-07-13 20:39:18,971 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 20:39:18,971 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 4540 transitions. [2021-07-13 20:39:18,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:39:18,973 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:18,973 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 20:39:19,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable490,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:19,189 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:19,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:19,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1778429757, now seen corresponding path program 11 times [2021-07-13 20:39:19,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:19,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587997184] [2021-07-13 20:39:19,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:19,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:19,640 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 20:39:19,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:19,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587997184] [2021-07-13 20:39:19,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587997184] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:19,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517413712] [2021-07-13 20:39:19,641 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 20:39:19,678 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:39:19,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:19,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:39:19,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:20,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:20,238 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:39:20,238 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 29 [2021-07-13 20:39:20,239 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:20,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:20,260 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:39:20,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 20:39:20,262 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:20,436 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-07-13 20:39:20,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:20,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:20,455 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:20,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 39 treesize of output 39 [2021-07-13 20:39:20,456 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:20,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:20,472 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:20,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 44 treesize of output 42 [2021-07-13 20:39:20,473 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:20,651 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-07-13 20:39:20,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:20,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:20,667 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:20,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 20:39:20,693 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:20,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:20,712 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:39:20,712 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 26 treesize of output 28 [2021-07-13 20:39:20,715 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:20,871 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-07-13 20:39:20,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:20,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:20,891 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:39:20,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 24 [2021-07-13 20:39:20,892 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:20,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:20,910 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:39:20,910 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 31 [2021-07-13 20:39:20,911 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:21,058 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-07-13 20:39:21,058 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: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:39:21,080 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:401, output treesize:389 [2021-07-13 20:39:21,265 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2021-07-13 20:39:21,348 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 20:39:21,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517413712] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:21,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:21,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:39:21,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135761924] [2021-07-13 20:39:21,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:39:21,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:21,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:39:21,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:39:21,349 INFO L87 Difference]: Start difference. First operand 1372 states and 4540 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 20:39:21,788 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2021-07-13 20:39:21,943 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 48 [2021-07-13 20:39:22,285 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 80 [2021-07-13 20:39:22,861 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 68 [2021-07-13 20:39:23,222 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 96 [2021-07-13 20:39:23,361 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2021-07-13 20:39:23,719 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 85 [2021-07-13 20:39:23,917 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2021-07-13 20:39:24,266 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 96 [2021-07-13 20:39:24,767 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 88 [2021-07-13 20:39:25,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:25,167 INFO L93 Difference]: Finished difference Result 2311 states and 7396 transitions. [2021-07-13 20:39:25,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:39:25,167 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 20:39:25,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:25,171 INFO L225 Difference]: With dead ends: 2311 [2021-07-13 20:39:25,171 INFO L226 Difference]: Without dead ends: 2281 [2021-07-13 20:39:25,171 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 3898.2ms TimeCoverageRelationStatistics Valid=362, Invalid=1618, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:39:25,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2281 states. [2021-07-13 20:39:25,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2281 to 1375. [2021-07-13 20:39:25,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1375 states, 1374 states have (on average 3.3151382823871907) internal successors, (4555), 1374 states have internal predecessors, (4555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:25,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1375 states to 1375 states and 4555 transitions. [2021-07-13 20:39:25,194 INFO L78 Accepts]: Start accepts. Automaton has 1375 states and 4555 transitions. Word has length 26 [2021-07-13 20:39:25,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:25,194 INFO L482 AbstractCegarLoop]: Abstraction has 1375 states and 4555 transitions. [2021-07-13 20:39:25,194 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 20:39:25,195 INFO L276 IsEmpty]: Start isEmpty. Operand 1375 states and 4555 transitions. [2021-07-13 20:39:25,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:39:25,197 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:25,197 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, 1, 1] [2021-07-13 20:39:25,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable520 [2021-07-13 20:39:25,413 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:25,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:25,413 INFO L82 PathProgramCache]: Analyzing trace with hash -746246473, now seen corresponding path program 12 times [2021-07-13 20:39:25,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:25,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161926925] [2021-07-13 20:39:25,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:25,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:25,667 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 58 [2021-07-13 20:39:25,798 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2021-07-13 20:39:26,056 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2021-07-13 20:39:26,175 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2021-07-13 20:39:26,207 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 20:39:26,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:26,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161926925] [2021-07-13 20:39:26,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161926925] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:26,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177994117] [2021-07-13 20:39:26,207 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 20:39:26,245 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:39:26,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:26,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 20:39:26,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:26,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:26,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:26,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:26,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:26,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:26,501 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:26,501 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 45 treesize of output 25 [2021-07-13 20:39:26,502 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:26,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:26,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:26,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:26,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:26,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:26,514 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:39:26,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 20 [2021-07-13 20:39:26,515 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:26,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:26,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:26,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:26,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:26,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:26,528 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:26,528 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 53 treesize of output 34 [2021-07-13 20:39:26,529 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:26,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:26,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:26,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:26,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:26,538 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:26,539 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 21 [2021-07-13 20:39:26,539 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:26,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:26,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:26,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:26,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:26,549 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:26,549 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 46 treesize of output 26 [2021-07-13 20:39:26,549 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:26,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:26,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:26,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:26,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:26,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:26,560 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:26,560 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 1 [2021-07-13 20:39:26,561 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:26,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:26,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:26,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:26,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:26,570 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:26,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 23 [2021-07-13 20:39:26,571 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:26,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:26,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:26,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:26,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:26,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:26,583 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-07-13 20:39:26,583 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 16 [2021-07-13 20:39:26,584 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:26,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:26,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:26,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:26,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:26,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:26,595 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:26,595 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 38 treesize of output 1 [2021-07-13 20:39:26,596 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:26,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:26,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:26,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:26,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:26,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:26,606 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:26,607 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 44 treesize of output 1 [2021-07-13 20:39:26,607 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:26,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:26,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:26,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:26,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:26,616 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:26,616 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 32 treesize of output 18 [2021-07-13 20:39:26,616 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:26,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:26,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:26,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:26,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:26,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:26,626 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:26,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 20:39:26,626 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:26,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:26,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:26,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:26,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:26,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:26,639 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:26,639 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 39 treesize of output 26 [2021-07-13 20:39:26,641 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:26,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:26,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:26,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:26,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:26,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:26,653 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:26,653 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 48 treesize of output 31 [2021-07-13 20:39:26,654 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:26,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:26,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:26,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:26,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:26,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:26,662 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:26,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 20:39:26,663 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:26,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:26,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:26,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:26,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:26,672 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:26,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 20:39:26,673 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:26,760 INFO L628 ElimStorePlain]: treesize reduction 54, result has 61.4 percent of original size [2021-07-13 20:39:26,761 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:39:26,762 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:833, output treesize:86 [2021-07-13 20:39:26,894 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 20:39:26,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177994117] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:26,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:26,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-13 20:39:26,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278544766] [2021-07-13 20:39:26,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:39:26,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:26,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:39:26,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:39:26,895 INFO L87 Difference]: Start difference. First operand 1375 states and 4555 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 20:39:27,496 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 65 [2021-07-13 20:39:27,697 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 63 [2021-07-13 20:39:27,880 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 64 [2021-07-13 20:39:28,005 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2021-07-13 20:39:28,174 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 64 [2021-07-13 20:39:28,424 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2021-07-13 20:39:28,577 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2021-07-13 20:39:29,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:29,182 INFO L93 Difference]: Finished difference Result 1790 states and 5831 transitions. [2021-07-13 20:39:29,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:39:29,182 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 20:39:29,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:29,185 INFO L225 Difference]: With dead ends: 1790 [2021-07-13 20:39:29,185 INFO L226 Difference]: Without dead ends: 1775 [2021-07-13 20:39:29,185 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 2573.4ms TimeCoverageRelationStatistics Valid=221, Invalid=1111, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:39:29,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1775 states. [2021-07-13 20:39:29,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1775 to 1378. [2021-07-13 20:39:29,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1378 states, 1377 states have (on average 3.316630355846042) internal successors, (4567), 1377 states have internal predecessors, (4567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:29,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1378 states to 1378 states and 4567 transitions. [2021-07-13 20:39:29,204 INFO L78 Accepts]: Start accepts. Automaton has 1378 states and 4567 transitions. Word has length 26 [2021-07-13 20:39:29,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:29,204 INFO L482 AbstractCegarLoop]: Abstraction has 1378 states and 4567 transitions. [2021-07-13 20:39:29,204 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 20:39:29,204 INFO L276 IsEmpty]: Start isEmpty. Operand 1378 states and 4567 transitions. [2021-07-13 20:39:29,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:39:29,206 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:29,206 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 20:39:29,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable559,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:29,422 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:29,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:29,422 INFO L82 PathProgramCache]: Analyzing trace with hash 148423883, now seen corresponding path program 13 times [2021-07-13 20:39:29,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:29,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197037571] [2021-07-13 20:39:29,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:29,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:29,620 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 52 [2021-07-13 20:39:29,925 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 20:39:29,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:29,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197037571] [2021-07-13 20:39:29,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197037571] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:29,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170438424] [2021-07-13 20:39:29,926 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 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 20:39:29,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:29,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:39:29,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:30,345 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-07-13 20:39:30,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:30,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:30,416 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:39:30,416 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 6 new quantified variables, introduced 4 case distinctions, treesize of input 66 treesize of output 1 [2021-07-13 20:39:30,417 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:30,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:30,429 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-07-13 20:39:30,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 77 treesize of output 57 [2021-07-13 20:39:30,430 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:30,539 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 81 [2021-07-13 20:39:30,539 INFO L628 ElimStorePlain]: treesize reduction 211, result has 55.7 percent of original size [2021-07-13 20:39:30,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:30,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-07-13 20:39:30,545 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:30,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:30,557 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-07-13 20:39:30,557 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 50 [2021-07-13 20:39:30,558 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:30,623 INFO L628 ElimStorePlain]: treesize reduction 19, result has 90.4 percent of original size [2021-07-13 20:39:30,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:30,629 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-07-13 20:39:30,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 30 [2021-07-13 20:39:30,630 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:30,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:30,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:30,669 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-07-13 20:39:30,669 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 78 treesize of output 53 [2021-07-13 20:39:30,670 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:30,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:30,693 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 20:39:30,693 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:619, output treesize:64 [2021-07-13 20:39:30,740 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 20:39:30,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170438424] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:30,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:30,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:39:30,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009552868] [2021-07-13 20:39:30,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:39:30,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:30,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:39:30,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:39:30,741 INFO L87 Difference]: Start difference. First operand 1378 states and 4567 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 20:39:31,275 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2021-07-13 20:39:31,648 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2021-07-13 20:39:31,850 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2021-07-13 20:39:32,108 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-07-13 20:39:32,298 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 74 [2021-07-13 20:39:32,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:32,421 INFO L93 Difference]: Finished difference Result 2164 states and 6833 transitions. [2021-07-13 20:39:32,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:39:32,421 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 20:39:32,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:32,425 INFO L225 Difference]: With dead ends: 2164 [2021-07-13 20:39:32,425 INFO L226 Difference]: Without dead ends: 2149 [2021-07-13 20:39:32,425 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 1990.7ms TimeCoverageRelationStatistics Valid=258, Invalid=932, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:39:32,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2149 states. [2021-07-13 20:39:32,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2149 to 1380. [2021-07-13 20:39:32,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 3.3168963016678754) internal successors, (4574), 1379 states have internal predecessors, (4574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:32,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 4574 transitions. [2021-07-13 20:39:32,445 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 4574 transitions. Word has length 26 [2021-07-13 20:39:32,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:32,445 INFO L482 AbstractCegarLoop]: Abstraction has 1380 states and 4574 transitions. [2021-07-13 20:39:32,445 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 20:39:32,445 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 4574 transitions. [2021-07-13 20:39:32,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:39:32,447 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:32,447 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 20:39:32,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable579 [2021-07-13 20:39:32,657 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:32,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:32,657 INFO L82 PathProgramCache]: Analyzing trace with hash -806418041, now seen corresponding path program 39 times [2021-07-13 20:39:32,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:32,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033394142] [2021-07-13 20:39:32,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:32,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:33,351 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 20:39:33,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:33,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033394142] [2021-07-13 20:39:33,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033394142] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:33,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393110194] [2021-07-13 20:39:33,351 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 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 20:39:33,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:39:33,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:33,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-13 20:39:33,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:33,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:33,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:33,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:33,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:33,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:33,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:33,719 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 42 treesize of output 20 [2021-07-13 20:39:33,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:33,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:33,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:33,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:33,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:33,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:33,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:33,728 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 49 treesize of output 23 [2021-07-13 20:39:33,729 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:33,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:33,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:33,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:33,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:33,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:33,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:33,736 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 50 treesize of output 18 [2021-07-13 20:39:33,737 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:33,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:33,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:33,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:33,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:33,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:33,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 24 [2021-07-13 20:39:33,745 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:33,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:33,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:33,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:33,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:33,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:33,758 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 20 [2021-07-13 20:39:33,759 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:33,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:33,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:33,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:33,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:33,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:33,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:33,767 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 18 [2021-07-13 20:39:33,768 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:33,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:33,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:33,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:33,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:33,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:33,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:33,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 25 [2021-07-13 20:39:33,777 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:33,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:33,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:33,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:33,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:33,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:33,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:33,787 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 12 [2021-07-13 20:39:33,788 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:33,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:33,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:33,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:33,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:33,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:33,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:33,802 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 18 [2021-07-13 20:39:33,803 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:33,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:33,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:33,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:33,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:33,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:33,810 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 62 treesize of output 28 [2021-07-13 20:39:33,811 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:33,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:33,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:33,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:33,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:33,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:33,818 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 49 treesize of output 23 [2021-07-13 20:39:33,818 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:33,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:33,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:33,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:33,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:33,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:33,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 24 [2021-07-13 20:39:33,826 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:33,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:33,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:33,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:33,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:33,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:33,842 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 48 treesize of output 14 [2021-07-13 20:39:33,843 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:33,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:33,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:33,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:33,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:33,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:33,850 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 57 treesize of output 25 [2021-07-13 20:39:33,850 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:33,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:33,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:33,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:33,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:33,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:33,857 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 57 treesize of output 24 [2021-07-13 20:39:33,858 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:33,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:33,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:33,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:33,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:33,862 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 58 treesize of output 28 [2021-07-13 20:39:33,862 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:33,914 INFO L628 ElimStorePlain]: treesize reduction 50, result has 49.5 percent of original size [2021-07-13 20:39:33,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:39:33,915 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:1097, output treesize:49 [2021-07-13 20:39:34,010 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 20:39:34,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393110194] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:34,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:34,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-07-13 20:39:34,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283821981] [2021-07-13 20:39:34,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:39:34,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:34,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:39:34,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:39:34,011 INFO L87 Difference]: Start difference. First operand 1380 states and 4574 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 20:39:34,516 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 75 [2021-07-13 20:39:34,897 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 87 [2021-07-13 20:39:35,357 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 75 [2021-07-13 20:39:36,029 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 84 [2021-07-13 20:39:37,140 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 77 [2021-07-13 20:39:37,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:37,539 INFO L93 Difference]: Finished difference Result 3078 states and 9474 transitions. [2021-07-13 20:39:37,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:39:37,539 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 20:39:37,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:37,544 INFO L225 Difference]: With dead ends: 3078 [2021-07-13 20:39:37,544 INFO L226 Difference]: Without dead ends: 2991 [2021-07-13 20:39:37,544 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 941 ImplicationChecksByTransitivity, 3499.3ms TimeCoverageRelationStatistics Valid=542, Invalid=2764, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:39:37,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2991 states. [2021-07-13 20:39:37,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2991 to 1413. [2021-07-13 20:39:37,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1413 states, 1412 states have (on average 3.3208215297450425) internal successors, (4689), 1412 states have internal predecessors, (4689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:37,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1413 states to 1413 states and 4689 transitions. [2021-07-13 20:39:37,571 INFO L78 Accepts]: Start accepts. Automaton has 1413 states and 4689 transitions. Word has length 26 [2021-07-13 20:39:37,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:37,571 INFO L482 AbstractCegarLoop]: Abstraction has 1413 states and 4689 transitions. [2021-07-13 20:39:37,571 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 20:39:37,571 INFO L276 IsEmpty]: Start isEmpty. Operand 1413 states and 4689 transitions. [2021-07-13 20:39:37,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:39:37,573 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:37,573 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 20:39:37,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable591,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:37,789 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:37,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:37,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1738294259, now seen corresponding path program 14 times [2021-07-13 20:39:37,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:37,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407634429] [2021-07-13 20:39:37,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:37,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:38,086 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2021-07-13 20:39:38,267 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 20:39:38,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:38,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407634429] [2021-07-13 20:39:38,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407634429] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:38,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851766627] [2021-07-13 20:39:38,268 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 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 20:39:38,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:39:38,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:38,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:39:38,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:38,702 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-07-13 20:39:39,069 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 216 [2021-07-13 20:39:39,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:39,312 INFO L354 Elim1Store]: treesize reduction 21, result has 48.8 percent of original size [2021-07-13 20:39:39,312 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 121 treesize of output 89 [2021-07-13 20:39:39,315 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:39,333 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-07-13 20:39:39,333 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 110 treesize of output 1 [2021-07-13 20:39:39,334 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:39,880 WARN L205 SmtUtils]: Spent 546.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 197 [2021-07-13 20:39:39,881 INFO L628 ElimStorePlain]: treesize reduction 788, result has 46.3 percent of original size [2021-07-13 20:39:39,903 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-07-13 20:39:39,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 52 [2021-07-13 20:39:39,905 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:40,056 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2021-07-13 20:39:40,056 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:40,089 INFO L354 Elim1Store]: treesize reduction 33, result has 32.7 percent of original size [2021-07-13 20:39:40,089 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 80 treesize of output 69 [2021-07-13 20:39:40,092 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:40,251 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2021-07-13 20:39:40,251 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:40,274 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-07-13 20:39:40,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 62 [2021-07-13 20:39:40,276 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:40,446 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2021-07-13 20:39:40,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:40,466 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-07-13 20:39:40,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 55 [2021-07-13 20:39:40,467 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:40,629 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2021-07-13 20:39:40,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:40,653 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-07-13 20:39:40,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 60 [2021-07-13 20:39:40,657 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:40,808 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2021-07-13 20:39:40,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:40,836 INFO L354 Elim1Store]: treesize reduction 33, result has 32.7 percent of original size [2021-07-13 20:39:40,836 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 72 [2021-07-13 20:39:40,838 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:40,987 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-07-13 20:39:40,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:41,014 INFO L354 Elim1Store]: treesize reduction 33, result has 32.7 percent of original size [2021-07-13 20:39:41,014 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 101 treesize of output 77 [2021-07-13 20:39:41,016 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:41,161 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-07-13 20:39:41,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:41,178 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 20:39:41,178 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 16 variables, input treesize:1661, output treesize:498 [2021-07-13 20:39:41,400 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2021-07-13 20:39:41,490 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 20:39:41,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851766627] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:41,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:41,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-07-13 20:39:41,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910185299] [2021-07-13 20:39:41,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:39:41,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:41,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:39:41,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:39:41,491 INFO L87 Difference]: Start difference. First operand 1413 states and 4689 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 20:39:42,035 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-07-13 20:39:42,220 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2021-07-13 20:39:42,380 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 75 [2021-07-13 20:39:42,670 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2021-07-13 20:39:42,918 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 79 [2021-07-13 20:39:43,088 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 73 [2021-07-13 20:39:43,312 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 79 [2021-07-13 20:39:43,680 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 76 [2021-07-13 20:39:44,302 WARN L205 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 92 [2021-07-13 20:39:45,926 WARN L205 SmtUtils]: Spent 1.47 s on a formula simplification. DAG size of input: 277 DAG size of output: 259 [2021-07-13 20:39:46,608 WARN L205 SmtUtils]: Spent 615.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 113 [2021-07-13 20:39:47,120 WARN L205 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 91 [2021-07-13 20:39:47,804 WARN L205 SmtUtils]: Spent 613.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 112 [2021-07-13 20:39:49,652 WARN L205 SmtUtils]: Spent 1.61 s on a formula simplification. DAG size of input: 274 DAG size of output: 258 [2021-07-13 20:39:51,654 WARN L205 SmtUtils]: Spent 1.86 s on a formula simplification. DAG size of input: 303 DAG size of output: 279 [2021-07-13 20:39:52,210 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2021-07-13 20:39:52,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:52,686 INFO L93 Difference]: Finished difference Result 2106 states and 6748 transitions. [2021-07-13 20:39:52,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:39:52,686 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 20:39:52,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:52,690 INFO L225 Difference]: With dead ends: 2106 [2021-07-13 20:39:52,690 INFO L226 Difference]: Without dead ends: 2091 [2021-07-13 20:39:52,691 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 10836.4ms TimeCoverageRelationStatistics Valid=306, Invalid=1500, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:39:52,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2091 states. [2021-07-13 20:39:52,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2091 to 1409. [2021-07-13 20:39:52,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1409 states, 1408 states have (on average 3.319602272727273) internal successors, (4674), 1408 states have internal predecessors, (4674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:52,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 4674 transitions. [2021-07-13 20:39:52,713 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 4674 transitions. Word has length 26 [2021-07-13 20:39:52,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:52,713 INFO L482 AbstractCegarLoop]: Abstraction has 1409 states and 4674 transitions. [2021-07-13 20:39:52,713 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 20:39:52,713 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 4674 transitions. [2021-07-13 20:39:52,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:39:52,715 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:52,715 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 20:39:52,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable610 [2021-07-13 20:39:52,917 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:52,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:52,917 INFO L82 PathProgramCache]: Analyzing trace with hash 120761479, now seen corresponding path program 15 times [2021-07-13 20:39:52,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:52,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258876662] [2021-07-13 20:39:52,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:52,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:53,352 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 20:39:53,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:53,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258876662] [2021-07-13 20:39:53,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258876662] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:53,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047013703] [2021-07-13 20:39:53,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:39:53,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:39:53,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:53,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:39:53,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:53,711 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-07-13 20:39:53,803 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_80, v_prenex_87, v_prenex_85, v_prenex_78], 6=[v_prenex_83, A, v_prenex_76, v_prenex_89]} [2021-07-13 20:39:53,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:53,819 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:39:53,820 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 20 [2021-07-13 20:39:53,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:54,105 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 153 [2021-07-13 20:39:54,105 INFO L628 ElimStorePlain]: treesize reduction 413, result has 53.5 percent of original size [2021-07-13 20:39:54,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:54,145 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:54,146 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 39 treesize of output 31 [2021-07-13 20:39:54,147 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:54,267 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2021-07-13 20:39:54,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:54,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:54,280 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:54,280 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 21 treesize of output 21 [2021-07-13 20:39:54,282 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:54,394 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-07-13 20:39:54,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:54,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:54,406 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:54,407 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 20:39:54,408 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:54,518 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-07-13 20:39:54,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:54,532 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-07-13 20:39:54,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 45 [2021-07-13 20:39:54,534 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:54,641 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-07-13 20:39:54,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:54,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:54,659 INFO L354 Elim1Store]: treesize reduction 33, result has 19.5 percent of original size [2021-07-13 20:39:54,659 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 51 [2021-07-13 20:39:54,660 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:54,761 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-07-13 20:39:54,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:54,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:54,779 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-07-13 20:39:54,779 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 87 treesize of output 63 [2021-07-13 20:39:54,781 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:54,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:54,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:54,888 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-07-13 20:39:54,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 31 [2021-07-13 20:39:54,889 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:54,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:54,991 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 20:39:54,991 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:903, output treesize:216 [2021-07-13 20:39:55,124 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 33 [2021-07-13 20:39:55,199 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 20:39:55,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047013703] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:55,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:55,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:39:55,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448532167] [2021-07-13 20:39:55,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:39:55,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:55,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:39:55,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:39:55,200 INFO L87 Difference]: Start difference. First operand 1409 states and 4674 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 20:39:55,817 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 75 [2021-07-13 20:39:55,954 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2021-07-13 20:39:56,677 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 82 [2021-07-13 20:39:56,977 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-07-13 20:39:57,136 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 87 [2021-07-13 20:39:57,792 WARN L205 SmtUtils]: Spent 591.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 79 [2021-07-13 20:39:58,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:58,113 INFO L93 Difference]: Finished difference Result 2320 states and 7312 transitions. [2021-07-13 20:39:58,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:39:58,113 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 20:39:58,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:58,116 INFO L225 Difference]: With dead ends: 2320 [2021-07-13 20:39:58,116 INFO L226 Difference]: Without dead ends: 2305 [2021-07-13 20:39:58,116 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 3147.6ms TimeCoverageRelationStatistics Valid=311, Invalid=1095, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:39:58,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2305 states. [2021-07-13 20:39:58,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2305 to 1409. [2021-07-13 20:39:58,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1409 states, 1408 states have (on average 3.319602272727273) internal successors, (4674), 1408 states have internal predecessors, (4674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:58,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 4674 transitions. [2021-07-13 20:39:58,137 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 4674 transitions. Word has length 26 [2021-07-13 20:39:58,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:58,137 INFO L482 AbstractCegarLoop]: Abstraction has 1409 states and 4674 transitions. [2021-07-13 20:39:58,137 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 20:39:58,137 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 4674 transitions. [2021-07-13 20:39:58,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:39:58,139 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:58,139 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] [2021-07-13 20:39:58,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable653 [2021-07-13 20:39:58,354 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:58,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:58,355 INFO L82 PathProgramCache]: Analyzing trace with hash 395894327, now seen corresponding path program 40 times [2021-07-13 20:39:58,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:58,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652638610] [2021-07-13 20:39:58,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:58,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:58,539 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 32 [2021-07-13 20:39:59,044 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 20:39:59,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:59,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652638610] [2021-07-13 20:39:59,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652638610] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:59,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343571817] [2021-07-13 20:39:59,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:39:59,070 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:39:59,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:59,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:39:59,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:59,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:59,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:59,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:59,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:59,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:59,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:59,629 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 59 treesize of output 31 [2021-07-13 20:39:59,630 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:59,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:59,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:59,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:59,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:59,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:59,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:59,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 26 [2021-07-13 20:39:59,638 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:59,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:59,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:59,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:59,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:59,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:59,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:59,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 18 [2021-07-13 20:39:59,647 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:59,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:59,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:59,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:59,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:59,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:59,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:59,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 26 [2021-07-13 20:39:59,655 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:59,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:59,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:59,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:59,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:59,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:59,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:59,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 24 [2021-07-13 20:39:59,664 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:59,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:59,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:59,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:59,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:59,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:59,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:59,672 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 61 treesize of output 31 [2021-07-13 20:39:59,673 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:59,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:59,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:59,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:59,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:59,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:59,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:59,682 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 46 treesize of output 24 [2021-07-13 20:39:59,683 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:59,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:59,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:59,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:59,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:59,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:59,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:59,691 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 62 treesize of output 32 [2021-07-13 20:39:59,692 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:59,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:59,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:59,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:59,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:59,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:59,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:59,700 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 54 treesize of output 28 [2021-07-13 20:39:59,701 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:59,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:59,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:59,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:59,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:59,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:59,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:59,710 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 58 treesize of output 30 [2021-07-13 20:39:59,711 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:59,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:59,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:59,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:59,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:59,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:59,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:59,720 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 65 treesize of output 33 [2021-07-13 20:39:59,721 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:59,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:59,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:59,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:59,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:59,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:59,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:59,729 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 53 treesize of output 27 [2021-07-13 20:39:59,730 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:59,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:59,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:59,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:59,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:59,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:59,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:59,738 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 73 treesize of output 37 [2021-07-13 20:39:59,739 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:59,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:59,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:59,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:59,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:59,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:59,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:59,746 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 43 treesize of output 23 [2021-07-13 20:39:59,747 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:59,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:59,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:59,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:59,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:59,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:59,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:59,754 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 44 treesize of output 24 [2021-07-13 20:39:59,755 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:59,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:59,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:59,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:59,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:59,759 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 46 treesize of output 24 [2021-07-13 20:39:59,760 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:59,839 INFO L628 ElimStorePlain]: treesize reduction 349, result has 11.9 percent of original size [2021-07-13 20:39:59,841 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 20:39:59,841 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:1077, output treesize:41 [2021-07-13 20:39:59,883 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 20:39:59,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343571817] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:59,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:59,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-07-13 20:39:59,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624816250] [2021-07-13 20:39:59,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:39:59,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:59,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:39:59,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:39:59,884 INFO L87 Difference]: Start difference. First operand 1409 states and 4674 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 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 20:40:00,845 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 78 [2021-07-13 20:40:01,021 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 80 [2021-07-13 20:40:01,564 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 73 [2021-07-13 20:40:01,733 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2021-07-13 20:40:02,125 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 79 [2021-07-13 20:40:02,447 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 65 [2021-07-13 20:40:02,880 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 70 [2021-07-13 20:40:03,042 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 71 [2021-07-13 20:40:03,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:03,403 INFO L93 Difference]: Finished difference Result 2743 states and 8648 transitions. [2021-07-13 20:40:03,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:40:03,404 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 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 20:40:03,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:03,408 INFO L225 Difference]: With dead ends: 2743 [2021-07-13 20:40:03,408 INFO L226 Difference]: Without dead ends: 2698 [2021-07-13 20:40:03,409 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 3723.0ms TimeCoverageRelationStatistics Valid=521, Invalid=2341, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:40:03,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2698 states. [2021-07-13 20:40:03,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2698 to 1412. [2021-07-13 20:40:03,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1412 states, 1411 states have (on average 3.3217576187101345) internal successors, (4687), 1411 states have internal predecessors, (4687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:03,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 4687 transitions. [2021-07-13 20:40:03,437 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 4687 transitions. Word has length 26 [2021-07-13 20:40:03,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:03,437 INFO L482 AbstractCegarLoop]: Abstraction has 1412 states and 4687 transitions. [2021-07-13 20:40:03,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 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 20:40:03,438 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 4687 transitions. [2021-07-13 20:40:03,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:40:03,442 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:03,443 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 20:40:03,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable674 [2021-07-13 20:40:03,657 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:03,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:03,658 INFO L82 PathProgramCache]: Analyzing trace with hash -2065424317, now seen corresponding path program 41 times [2021-07-13 20:40:03,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:03,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481298753] [2021-07-13 20:40:03,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:03,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:04,016 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 20:40:04,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:04,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481298753] [2021-07-13 20:40:04,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481298753] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:04,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181311801] [2021-07-13 20:40:04,016 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 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 20:40:04,040 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:40:04,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:04,041 WARN L261 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 20:40:04,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:04,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:04,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:04,623 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-13 20:40:04,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 36 [2021-07-13 20:40:04,627 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:04,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:04,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:04,656 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-13 20:40:04,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 44 [2021-07-13 20:40:04,659 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:04,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:04,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:04,692 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-07-13 20:40:04,692 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 44 treesize of output 46 [2021-07-13 20:40:04,698 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:04,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:04,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:04,725 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-07-13 20:40:04,726 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 43 treesize of output 37 [2021-07-13 20:40:04,728 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:04,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:04,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:04,755 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-13 20:40:04,755 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 53 treesize of output 43 [2021-07-13 20:40:04,759 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:04,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:04,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:04,785 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-07-13 20:40:04,785 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 64 treesize of output 38 [2021-07-13 20:40:04,787 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:40:04,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:04,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:04,802 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:40:04,802 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 40 treesize of output 20 [2021-07-13 20:40:04,804 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:04,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:04,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:04,821 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:40:04,821 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 39 treesize of output 1 [2021-07-13 20:40:04,822 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:04,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:04,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:04,839 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:40:04,839 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 39 treesize of output 1 [2021-07-13 20:40:04,840 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:04,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:04,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:04,874 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-07-13 20:40:04,875 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 44 treesize of output 48 [2021-07-13 20:40:04,877 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:04,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:04,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:04,894 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:40:04,894 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 20:40:04,895 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:04,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:04,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:04,909 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:40:04,909 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 18 [2021-07-13 20:40:04,911 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:04,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:04,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:04,927 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:40:04,927 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 51 treesize of output 1 [2021-07-13 20:40:04,927 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:04,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:04,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:04,952 INFO L354 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2021-07-13 20:40:04,953 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 52 treesize of output 35 [2021-07-13 20:40:04,954 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:04,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:04,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:04,969 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:40:04,969 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 55 treesize of output 1 [2021-07-13 20:40:04,969 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:04,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:04,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:04,979 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:40:04,979 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 47 treesize of output 1 [2021-07-13 20:40:04,980 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:05,106 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 30 [2021-07-13 20:40:05,106 INFO L628 ElimStorePlain]: treesize reduction 202, result has 36.7 percent of original size [2021-07-13 20:40:05,108 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 20:40:05,108 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:1065, output treesize:103 [2021-07-13 20:40:05,257 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 20:40:05,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181311801] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:05,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:05,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-13 20:40:05,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457533268] [2021-07-13 20:40:05,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:40:05,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:05,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:40:05,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:40:05,258 INFO L87 Difference]: Start difference. First operand 1412 states and 4687 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 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 20:40:05,656 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-07-13 20:40:05,954 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-07-13 20:40:06,185 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 68 [2021-07-13 20:40:06,876 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 66 [2021-07-13 20:40:07,321 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-07-13 20:40:07,571 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2021-07-13 20:40:07,848 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-07-13 20:40:08,104 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 68 [2021-07-13 20:40:08,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:08,391 INFO L93 Difference]: Finished difference Result 2483 states and 7959 transitions. [2021-07-13 20:40:08,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:40:08,392 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 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 20:40:08,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:08,396 INFO L225 Difference]: With dead ends: 2483 [2021-07-13 20:40:08,396 INFO L226 Difference]: Without dead ends: 2453 [2021-07-13 20:40:08,396 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 678 ImplicationChecksByTransitivity, 2920.8ms TimeCoverageRelationStatistics Valid=451, Invalid=1999, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:40:08,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2453 states. [2021-07-13 20:40:08,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2453 to 1413. [2021-07-13 20:40:08,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1413 states, 1412 states have (on average 3.3236543909348444) internal successors, (4693), 1412 states have internal predecessors, (4693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:08,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1413 states to 1413 states and 4693 transitions. [2021-07-13 20:40:08,420 INFO L78 Accepts]: Start accepts. Automaton has 1413 states and 4693 transitions. Word has length 26 [2021-07-13 20:40:08,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:08,421 INFO L482 AbstractCegarLoop]: Abstraction has 1413 states and 4693 transitions. [2021-07-13 20:40:08,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 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 20:40:08,421 INFO L276 IsEmpty]: Start isEmpty. Operand 1413 states and 4693 transitions. [2021-07-13 20:40:08,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:40:08,423 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:08,423 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 20:40:08,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable768,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:40:08,639 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:08,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:08,639 INFO L82 PathProgramCache]: Analyzing trace with hash 386531115, now seen corresponding path program 16 times [2021-07-13 20:40:08,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:08,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717790133] [2021-07-13 20:40:08,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:08,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:08,841 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2021-07-13 20:40:08,976 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 44 [2021-07-13 20:40:09,225 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 20:40:09,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:09,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717790133] [2021-07-13 20:40:09,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717790133] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:09,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942865692] [2021-07-13 20:40:09,225 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 20:40:09,256 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:40:09,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:09,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:40:09,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:09,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:09,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:09,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:09,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 16 [2021-07-13 20:40:09,665 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:09,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:09,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:09,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:09,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 41 treesize of output 22 [2021-07-13 20:40:09,671 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:09,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:09,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:09,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:09,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 18 [2021-07-13 20:40:09,681 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:09,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:09,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:09,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:09,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-07-13 20:40:09,688 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:09,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:09,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:09,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:09,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 44 treesize of output 26 [2021-07-13 20:40:09,694 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:09,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:09,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:09,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:09,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 10 [2021-07-13 20:40:09,701 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:09,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:09,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:09,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:09,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 35 treesize of output 21 [2021-07-13 20:40:09,707 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:09,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:09,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:09,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:09,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 22 [2021-07-13 20:40:09,714 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:09,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:09,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:09,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:09,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 39 treesize of output 23 [2021-07-13 20:40:09,720 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:09,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:09,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:09,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:09,727 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-07-13 20:40:09,727 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:09,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:09,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:09,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:09,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2021-07-13 20:40:09,733 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:09,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:09,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:09,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:09,739 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2021-07-13 20:40:09,739 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:09,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:09,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:09,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:09,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16 [2021-07-13 20:40:09,745 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:09,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:09,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:09,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:09,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-07-13 20:40:09,751 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:09,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:09,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:09,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:09,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 22 [2021-07-13 20:40:09,757 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:09,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:09,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:09,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 16 [2021-07-13 20:40:09,761 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:09,819 INFO L628 ElimStorePlain]: treesize reduction 73, result has 46.7 percent of original size [2021-07-13 20:40:09,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:40:09,820 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:46 [2021-07-13 20:40:09,862 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 20:40:09,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942865692] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:09,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:09,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:40:09,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042677994] [2021-07-13 20:40:09,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:40:09,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:09,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:40:09,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:40:09,863 INFO L87 Difference]: Start difference. First operand 1413 states and 4693 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 20:40:10,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:10,563 INFO L93 Difference]: Finished difference Result 1799 states and 5861 transitions. [2021-07-13 20:40:10,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:40:10,564 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 20:40:10,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:10,567 INFO L225 Difference]: With dead ends: 1799 [2021-07-13 20:40:10,567 INFO L226 Difference]: Without dead ends: 1784 [2021-07-13 20:40:10,567 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1196.7ms TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:40:10,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1784 states. [2021-07-13 20:40:10,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1784 to 1422. [2021-07-13 20:40:10,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1422 states, 1421 states have (on average 3.3237156931738214) internal successors, (4723), 1421 states have internal predecessors, (4723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:10,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1422 states to 1422 states and 4723 transitions. [2021-07-13 20:40:10,590 INFO L78 Accepts]: Start accepts. Automaton has 1422 states and 4723 transitions. Word has length 26 [2021-07-13 20:40:10,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:10,590 INFO L482 AbstractCegarLoop]: Abstraction has 1422 states and 4723 transitions. [2021-07-13 20:40:10,590 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 20:40:10,590 INFO L276 IsEmpty]: Start isEmpty. Operand 1422 states and 4723 transitions. [2021-07-13 20:40:10,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:40:10,592 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:10,592 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 20:40:10,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable886,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:40:10,808 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:10,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:10,809 INFO L82 PathProgramCache]: Analyzing trace with hash 715690687, now seen corresponding path program 17 times [2021-07-13 20:40:10,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:10,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392402758] [2021-07-13 20:40:10,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:10,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:11,179 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-07-13 20:40:11,367 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 20:40:11,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:11,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392402758] [2021-07-13 20:40:11,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392402758] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:11,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446201926] [2021-07-13 20:40:11,367 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 20:40:11,394 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:40:11,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:11,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:40:11,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:11,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:11,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:11,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:11,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 18 [2021-07-13 20:40:11,838 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:11,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:11,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:11,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:11,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 44 treesize of output 26 [2021-07-13 20:40:11,844 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:11,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:11,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:11,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:11,848 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 44 treesize of output 26 [2021-07-13 20:40:11,849 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:11,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:11,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:11,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:11,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 16 [2021-07-13 20:40:11,855 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:11,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:11,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:11,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:11,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 16 [2021-07-13 20:40:11,860 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:11,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:11,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:11,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:11,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-07-13 20:40:11,866 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:11,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:11,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:11,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:11,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 41 treesize of output 22 [2021-07-13 20:40:11,872 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:11,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:11,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:11,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:11,877 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-07-13 20:40:11,877 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:11,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:11,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:11,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:11,882 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 26 treesize of output 16 [2021-07-13 20:40:11,883 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:11,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:11,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:11,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:11,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 39 treesize of output 23 [2021-07-13 20:40:11,888 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:11,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:11,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:11,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:11,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 22 [2021-07-13 20:40:11,894 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:11,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:11,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:11,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:11,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 35 treesize of output 21 [2021-07-13 20:40:11,899 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:11,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:11,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:11,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:11,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 10 [2021-07-13 20:40:11,905 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:11,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:11,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:11,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:11,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 16 [2021-07-13 20:40:11,910 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:11,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:11,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:11,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:11,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-07-13 20:40:11,914 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:11,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:11,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:11,917 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 35 treesize of output 21 [2021-07-13 20:40:11,918 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:11,984 INFO L628 ElimStorePlain]: treesize reduction 71, result has 47.4 percent of original size [2021-07-13 20:40:11,985 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:40:11,986 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:46 [2021-07-13 20:40:12,031 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 20:40:12,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446201926] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:12,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:12,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:40:12,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191396399] [2021-07-13 20:40:12,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:40:12,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:12,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:40:12,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:40:12,032 INFO L87 Difference]: Start difference. First operand 1422 states and 4723 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 20:40:12,447 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 43 [2021-07-13 20:40:12,616 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 45 [2021-07-13 20:40:13,041 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2021-07-13 20:40:13,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:13,527 INFO L93 Difference]: Finished difference Result 1615 states and 5256 transitions. [2021-07-13 20:40:13,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:40:13,527 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 20:40:13,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:13,530 INFO L225 Difference]: With dead ends: 1615 [2021-07-13 20:40:13,530 INFO L226 Difference]: Without dead ends: 1600 [2021-07-13 20:40:13,530 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 1864.2ms TimeCoverageRelationStatistics Valid=172, Invalid=884, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:40:13,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1600 states. [2021-07-13 20:40:13,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1600 to 1431. [2021-07-13 20:40:13,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1431 states, 1430 states have (on average 3.327972027972028) internal successors, (4759), 1430 states have internal predecessors, (4759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:13,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1431 states to 1431 states and 4759 transitions. [2021-07-13 20:40:13,549 INFO L78 Accepts]: Start accepts. Automaton has 1431 states and 4759 transitions. Word has length 26 [2021-07-13 20:40:13,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:13,549 INFO L482 AbstractCegarLoop]: Abstraction has 1431 states and 4759 transitions. [2021-07-13 20:40:13,550 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 20:40:13,550 INFO L276 IsEmpty]: Start isEmpty. Operand 1431 states and 4759 transitions. [2021-07-13 20:40:13,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:40:13,552 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:13,552 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 20:40:13,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable920 [2021-07-13 20:40:13,765 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:13,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:13,765 INFO L82 PathProgramCache]: Analyzing trace with hash 547881595, now seen corresponding path program 18 times [2021-07-13 20:40:13,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:13,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109156934] [2021-07-13 20:40:13,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:13,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:14,029 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 61 [2021-07-13 20:40:14,245 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 57 [2021-07-13 20:40:14,461 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 59 [2021-07-13 20:40:14,656 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 20:40:14,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:14,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109156934] [2021-07-13 20:40:14,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109156934] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:14,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367999867] [2021-07-13 20:40:14,656 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:40:14,683 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:40:14,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:14,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 20:40:14,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:15,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:15,026 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:15,027 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 39 treesize of output 31 [2021-07-13 20:40:15,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:15,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:15,036 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:40:15,036 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 18 [2021-07-13 20:40:15,037 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:15,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:15,048 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:15,048 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 27 [2021-07-13 20:40:15,050 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:15,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:15,059 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:40:15,060 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 26 treesize of output 1 [2021-07-13 20:40:15,060 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:15,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:15,071 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:40:15,071 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 1 [2021-07-13 20:40:15,071 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:15,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:15,081 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:40:15,081 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 35 treesize of output 21 [2021-07-13 20:40:15,082 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:15,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:15,093 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:40:15,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 20:40:15,094 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:15,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:15,105 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:40:15,105 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 39 treesize of output 23 [2021-07-13 20:40:15,105 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:15,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:15,118 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-07-13 20:40:15,119 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 30 treesize of output 21 [2021-07-13 20:40:15,120 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:15,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:15,130 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:40:15,130 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 20:40:15,131 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:15,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:15,141 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:40:15,141 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 20:40:15,141 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:15,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:15,152 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:40:15,152 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 44 treesize of output 26 [2021-07-13 20:40:15,152 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:15,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:15,162 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:40:15,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 13 [2021-07-13 20:40:15,164 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:15,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:15,176 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:15,176 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 44 treesize of output 34 [2021-07-13 20:40:15,177 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:15,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:15,187 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:40:15,187 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 41 treesize of output 25 [2021-07-13 20:40:15,188 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:15,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:15,195 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:40:15,195 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 35 treesize of output 1 [2021-07-13 20:40:15,196 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:15,280 INFO L628 ElimStorePlain]: treesize reduction 55, result has 61.8 percent of original size [2021-07-13 20:40:15,283 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:40:15,283 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:761, output treesize:88 [2021-07-13 20:40:15,403 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 20:40:15,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367999867] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:15,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:15,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-07-13 20:40:15,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99223996] [2021-07-13 20:40:15,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:40:15,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:15,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:40:15,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:40:15,404 INFO L87 Difference]: Start difference. First operand 1431 states and 4759 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 20:40:16,012 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 66 [2021-07-13 20:40:16,136 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2021-07-13 20:40:16,443 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2021-07-13 20:40:16,639 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2021-07-13 20:40:16,947 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2021-07-13 20:40:17,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:17,003 INFO L93 Difference]: Finished difference Result 1909 states and 6216 transitions. [2021-07-13 20:40:17,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:40:17,004 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 20:40:17,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:17,007 INFO L225 Difference]: With dead ends: 1909 [2021-07-13 20:40:17,007 INFO L226 Difference]: Without dead ends: 1894 [2021-07-13 20:40:17,007 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 2256.9ms TimeCoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:40:17,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1894 states. [2021-07-13 20:40:17,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1894 to 1422. [2021-07-13 20:40:17,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1422 states, 1421 states have (on average 3.3237156931738214) internal successors, (4723), 1421 states have internal predecessors, (4723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:17,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1422 states to 1422 states and 4723 transitions. [2021-07-13 20:40:17,026 INFO L78 Accepts]: Start accepts. Automaton has 1422 states and 4723 transitions. Word has length 26 [2021-07-13 20:40:17,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:17,026 INFO L482 AbstractCegarLoop]: Abstraction has 1422 states and 4723 transitions. [2021-07-13 20:40:17,026 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 20:40:17,026 INFO L276 IsEmpty]: Start isEmpty. Operand 1422 states and 4723 transitions. [2021-07-13 20:40:17,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:40:17,028 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:17,028 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 20:40:17,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable950 [2021-07-13 20:40:17,232 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:17,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:17,232 INFO L82 PathProgramCache]: Analyzing trace with hash -2104983929, now seen corresponding path program 19 times [2021-07-13 20:40:17,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:17,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028304287] [2021-07-13 20:40:17,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:17,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:17,484 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 48 [2021-07-13 20:40:17,652 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 42 [2021-07-13 20:40:17,837 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2021-07-13 20:40:18,063 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 21 [2021-07-13 20:40:18,169 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 20:40:18,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:18,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028304287] [2021-07-13 20:40:18,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028304287] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:18,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006361139] [2021-07-13 20:40:18,169 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 20:40:18,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:18,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:40:18,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:18,498 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-07-13 20:40:18,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:18,559 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:40:18,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 20 [2021-07-13 20:40:18,560 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:18,687 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-13 20:40:18,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:18,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:18,700 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:40:18,700 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 35 treesize of output 25 [2021-07-13 20:40:18,701 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:18,824 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-07-13 20:40:18,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:18,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:18,837 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:40:18,837 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 20 [2021-07-13 20:40:18,838 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:18,953 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2021-07-13 20:40:18,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:18,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:18,965 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:18,965 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 21 treesize of output 21 [2021-07-13 20:40:18,967 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:19,075 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-07-13 20:40:19,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:19,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:19,087 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:19,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-07-13 20:40:19,088 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:19,198 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-07-13 20:40:19,198 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:19,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:19,209 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:19,210 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 39 treesize of output 31 [2021-07-13 20:40:19,211 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:19,318 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-07-13 20:40:19,318 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:19,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:19,329 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:19,329 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 31 treesize of output 27 [2021-07-13 20:40:19,330 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:19,434 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-07-13 20:40:19,434 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:19,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:19,444 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:19,445 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 20:40:19,449 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:19,573 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-07-13 20:40:19,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:19,581 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 20:40:19,581 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:377, output treesize:216 [2021-07-13 20:40:19,714 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-07-13 20:40:19,788 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 20:40:19,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006361139] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:19,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:19,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:40:19,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480518298] [2021-07-13 20:40:19,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:40:19,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:19,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:40:19,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:40:19,789 INFO L87 Difference]: Start difference. First operand 1422 states and 4723 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 20:40:20,522 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2021-07-13 20:40:21,017 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-07-13 20:40:21,504 WARN L205 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2021-07-13 20:40:21,925 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 76 [2021-07-13 20:40:22,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:22,155 INFO L93 Difference]: Finished difference Result 2073 states and 6674 transitions. [2021-07-13 20:40:22,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:40:22,156 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 20:40:22,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:22,159 INFO L225 Difference]: With dead ends: 2073 [2021-07-13 20:40:22,159 INFO L226 Difference]: Without dead ends: 2058 [2021-07-13 20:40:22,159 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 3170.4ms TimeCoverageRelationStatistics Valid=240, Invalid=950, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:40:22,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2058 states. [2021-07-13 20:40:22,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2058 to 1419. [2021-07-13 20:40:22,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1419 states, 1418 states have (on average 3.3222849083215795) internal successors, (4711), 1418 states have internal predecessors, (4711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:22,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1419 states to 1419 states and 4711 transitions. [2021-07-13 20:40:22,180 INFO L78 Accepts]: Start accepts. Automaton has 1419 states and 4711 transitions. Word has length 26 [2021-07-13 20:40:22,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:22,180 INFO L482 AbstractCegarLoop]: Abstraction has 1419 states and 4711 transitions. [2021-07-13 20:40:22,180 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 20:40:22,180 INFO L276 IsEmpty]: Start isEmpty. Operand 1419 states and 4711 transitions. [2021-07-13 20:40:22,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:40:22,182 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:22,182 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 20:40:22,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable988 [2021-07-13 20:40:22,398 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:22,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:22,398 INFO L82 PathProgramCache]: Analyzing trace with hash 178197831, now seen corresponding path program 20 times [2021-07-13 20:40:22,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:22,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972994299] [2021-07-13 20:40:22,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:22,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:22,751 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 20:40:22,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:22,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972994299] [2021-07-13 20:40:22,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972994299] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:22,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623061533] [2021-07-13 20:40:22,752 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 20:40:22,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:40:22,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:22,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:40:22,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:23,136 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:40:23,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 20:40:23,136 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:23,155 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:40:23,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 20:40:23,157 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:23,177 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:40:23,178 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 39 treesize of output 35 [2021-07-13 20:40:23,179 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:23,215 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:40:23,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 20:40:23,216 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:23,236 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:40:23,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 31 [2021-07-13 20:40:23,238 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:23,247 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:40:23,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 44 treesize of output 26 [2021-07-13 20:40:23,248 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:23,257 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:40:23,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 18 [2021-07-13 20:40:23,258 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:23,270 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-07-13 20:40:23,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 16 [2021-07-13 20:40:23,272 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:23,286 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:23,287 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 42 [2021-07-13 20:40:23,288 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:23,297 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:40:23,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 41 treesize of output 25 [2021-07-13 20:40:23,298 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:23,307 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:40:23,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 20:40:23,308 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:23,316 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:40:23,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 35 treesize of output 21 [2021-07-13 20:40:23,317 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:23,333 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-07-13 20:40:23,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 25 [2021-07-13 20:40:23,335 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:23,344 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:40:23,344 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 39 treesize of output 23 [2021-07-13 20:40:23,344 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:23,354 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:40:23,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 1 [2021-07-13 20:40:23,354 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:23,361 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:40:23,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 35 treesize of output 1 [2021-07-13 20:40:23,361 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:23,475 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-07-13 20:40:23,475 INFO L628 ElimStorePlain]: treesize reduction 63, result has 68.8 percent of original size [2021-07-13 20:40:23,481 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 20:40:23,482 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:157 [2021-07-13 20:40:23,615 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 20:40:23,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623061533] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:23,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:23,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:40:23,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552852330] [2021-07-13 20:40:23,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:40:23,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:23,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:40:23,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:40:23,616 INFO L87 Difference]: Start difference. First operand 1419 states and 4711 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 20:40:25,096 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-07-13 20:40:25,224 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-07-13 20:40:25,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:25,726 INFO L93 Difference]: Finished difference Result 1996 states and 6371 transitions. [2021-07-13 20:40:25,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:40:25,726 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 20:40:25,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:25,729 INFO L225 Difference]: With dead ends: 1996 [2021-07-13 20:40:25,729 INFO L226 Difference]: Without dead ends: 1956 [2021-07-13 20:40:25,729 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 2165.2ms TimeCoverageRelationStatistics Valid=290, Invalid=1602, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:40:25,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1956 states. [2021-07-13 20:40:25,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1956 to 1468. [2021-07-13 20:40:25,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1468 states, 1467 states have (on average 3.319700068166326) internal successors, (4870), 1467 states have internal predecessors, (4870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:25,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1468 states to 1468 states and 4870 transitions. [2021-07-13 20:40:25,750 INFO L78 Accepts]: Start accepts. Automaton has 1468 states and 4870 transitions. Word has length 26 [2021-07-13 20:40:25,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:25,750 INFO L482 AbstractCegarLoop]: Abstraction has 1468 states and 4870 transitions. [2021-07-13 20:40:25,750 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 20:40:25,750 INFO L276 IsEmpty]: Start isEmpty. Operand 1468 states and 4870 transitions. [2021-07-13 20:40:25,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:40:25,752 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:25,752 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 20:40:25,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1001 [2021-07-13 20:40:25,968 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:25,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:25,968 INFO L82 PathProgramCache]: Analyzing trace with hash -2057127289, now seen corresponding path program 21 times [2021-07-13 20:40:25,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:25,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184295151] [2021-07-13 20:40:25,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:25,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:26,323 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 20:40:26,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:26,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184295151] [2021-07-13 20:40:26,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184295151] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:26,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324941044] [2021-07-13 20:40:26,324 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 20:40:26,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:40:26,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:26,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:40:26,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:26,635 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:40:26,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 20:40:26,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:26,644 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:40:26,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 20:40:26,645 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:26,660 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:40:26,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 24 [2021-07-13 20:40:26,662 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:26,679 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:40:26,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 20:40:26,681 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:26,689 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:40:26,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 35 treesize of output 21 [2021-07-13 20:40:26,690 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:26,698 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:40:26,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 13 [2021-07-13 20:40:26,699 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:26,716 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:40:26,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 31 [2021-07-13 20:40:26,718 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:26,726 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:40:26,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 20:40:26,726 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:26,735 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:40:26,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 20:40:26,735 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:26,752 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:40:26,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 35 treesize of output 33 [2021-07-13 20:40:26,754 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:26,762 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:40:26,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 39 treesize of output 23 [2021-07-13 20:40:26,762 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:26,780 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:40:26,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 39 treesize of output 35 [2021-07-13 20:40:26,781 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:26,789 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:40:26,789 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 30 treesize of output 18 [2021-07-13 20:40:26,790 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:26,803 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:26,803 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 42 [2021-07-13 20:40:26,804 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:26,816 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:40:26,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 41 treesize of output 25 [2021-07-13 20:40:26,816 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:26,822 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:40:26,822 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 26 [2021-07-13 20:40:26,823 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:27,005 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2021-07-13 20:40:27,005 INFO L628 ElimStorePlain]: treesize reduction 156, result has 50.5 percent of original size [2021-07-13 20:40:27,012 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 20:40:27,012 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:873, output treesize:221 [2021-07-13 20:40:27,141 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-07-13 20:40:27,306 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 20:40:27,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324941044] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:27,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:27,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-07-13 20:40:27,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861099426] [2021-07-13 20:40:27,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:40:27,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:27,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:40:27,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:40:27,307 INFO L87 Difference]: Start difference. First operand 1468 states and 4870 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 20:40:27,869 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-07-13 20:40:28,218 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-07-13 20:40:28,402 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-07-13 20:40:28,930 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 65 [2021-07-13 20:40:29,234 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 37 [2021-07-13 20:40:29,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:29,298 INFO L93 Difference]: Finished difference Result 2188 states and 6976 transitions. [2021-07-13 20:40:29,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:40:29,299 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 20:40:29,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:29,303 INFO L225 Difference]: With dead ends: 2188 [2021-07-13 20:40:29,303 INFO L226 Difference]: Without dead ends: 2163 [2021-07-13 20:40:29,303 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 2105.5ms TimeCoverageRelationStatistics Valid=241, Invalid=1091, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:40:29,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2163 states. [2021-07-13 20:40:29,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2163 to 1486. [2021-07-13 20:40:29,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1486 states, 1485 states have (on average 3.3252525252525253) internal successors, (4938), 1485 states have internal predecessors, (4938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:29,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1486 states to 1486 states and 4938 transitions. [2021-07-13 20:40:29,325 INFO L78 Accepts]: Start accepts. Automaton has 1486 states and 4938 transitions. Word has length 26 [2021-07-13 20:40:29,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:29,325 INFO L482 AbstractCegarLoop]: Abstraction has 1486 states and 4938 transitions. [2021-07-13 20:40:29,325 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 20:40:29,325 INFO L276 IsEmpty]: Start isEmpty. Operand 1486 states and 4938 transitions. [2021-07-13 20:40:29,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:40:29,327 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:29,327 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 20:40:29,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1042,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:40:29,541 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:29,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:29,541 INFO L82 PathProgramCache]: Analyzing trace with hash 309162187, now seen corresponding path program 22 times [2021-07-13 20:40:29,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:29,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254489949] [2021-07-13 20:40:29,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:29,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:29,876 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 38 [2021-07-13 20:40:30,174 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 20:40:30,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:30,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254489949] [2021-07-13 20:40:30,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254489949] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:30,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023652030] [2021-07-13 20:40:30,175 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 20:40:30,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:40:30,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:30,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:40:30,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:30,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:30,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:30,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:30,483 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 21 treesize of output 10 [2021-07-13 20:40:30,484 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:30,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:30,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:30,489 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-07-13 20:40:30,490 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:30,638 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-07-13 20:40:30,639 INFO L628 ElimStorePlain]: treesize reduction 106, result has 62.4 percent of original size [2021-07-13 20:40:30,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:30,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:30,643 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 26 treesize of output 16 [2021-07-13 20:40:30,645 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:30,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:30,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:30,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:30,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 35 treesize of output 21 [2021-07-13 20:40:30,705 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:30,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:30,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:30,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:30,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:30,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 15 [2021-07-13 20:40:30,767 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:30,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:30,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:30,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 20 [2021-07-13 20:40:30,772 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:30,816 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:30,819 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 20:40:30,819 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:337, output treesize:72 [2021-07-13 20:40:30,891 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 20:40:30,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023652030] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:30,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:30,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:40:30,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833395646] [2021-07-13 20:40:30,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:40:30,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:30,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:40:30,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:40:30,892 INFO L87 Difference]: Start difference. First operand 1486 states and 4938 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 20:40:31,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:31,216 INFO L93 Difference]: Finished difference Result 1609 states and 5273 transitions. [2021-07-13 20:40:31,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:40:31,216 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 20:40:31,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:31,219 INFO L225 Difference]: With dead ends: 1609 [2021-07-13 20:40:31,219 INFO L226 Difference]: Without dead ends: 1594 [2021-07-13 20:40:31,220 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 852.8ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:40:31,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1594 states. [2021-07-13 20:40:31,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1594 to 1492. [2021-07-13 20:40:31,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1492 states, 1491 states have (on average 3.3272971160295106) internal successors, (4961), 1491 states have internal predecessors, (4961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:31,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1492 states to 1492 states and 4961 transitions. [2021-07-13 20:40:31,238 INFO L78 Accepts]: Start accepts. Automaton has 1492 states and 4961 transitions. Word has length 26 [2021-07-13 20:40:31,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:31,238 INFO L482 AbstractCegarLoop]: Abstraction has 1492 states and 4961 transitions. [2021-07-13 20:40:31,238 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 20:40:31,238 INFO L276 IsEmpty]: Start isEmpty. Operand 1492 states and 4961 transitions. [2021-07-13 20:40:31,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:40:31,240 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:31,240 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 20:40:31,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1087,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:40:31,456 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:31,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:31,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1879987787, now seen corresponding path program 23 times [2021-07-13 20:40:31,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:31,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481941490] [2021-07-13 20:40:31,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:31,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:31,880 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 20:40:31,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:31,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481941490] [2021-07-13 20:40:31,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481941490] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:31,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538268516] [2021-07-13 20:40:31,881 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 20:40:31,906 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:40:31,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:31,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:40:31,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:32,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:32,216 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:32,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-07-13 20:40:32,218 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:32,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:32,226 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:40:32,226 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 35 treesize of output 1 [2021-07-13 20:40:32,227 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:32,357 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-07-13 20:40:32,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:32,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:32,370 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:32,370 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 31 treesize of output 27 [2021-07-13 20:40:32,371 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:32,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:32,380 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:40:32,380 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 1 [2021-07-13 20:40:32,381 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:32,485 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-07-13 20:40:32,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:32,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:32,497 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:32,497 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 21 [2021-07-13 20:40:32,499 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:32,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:32,509 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:40:32,509 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 20 [2021-07-13 20:40:32,510 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:32,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:32,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:32,612 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:32,612 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 39 treesize of output 31 [2021-07-13 20:40:32,613 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:32,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:32,622 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-07-13 20:40:32,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 21 [2021-07-13 20:40:32,623 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:32,776 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2021-07-13 20:40:32,776 INFO L628 ElimStorePlain]: treesize reduction 3, result has 98.4 percent of original size [2021-07-13 20:40:32,782 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-07-13 20:40:32,782 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:377, output treesize:160 [2021-07-13 20:40:32,955 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 20:40:32,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538268516] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:32,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:32,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:40:32,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184429360] [2021-07-13 20:40:32,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:40:32,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:32,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:40:32,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:40:32,956 INFO L87 Difference]: Start difference. First operand 1492 states and 4961 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 20:40:33,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:33,726 INFO L93 Difference]: Finished difference Result 1996 states and 6490 transitions. [2021-07-13 20:40:33,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:40:33,726 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 20:40:33,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:33,729 INFO L225 Difference]: With dead ends: 1996 [2021-07-13 20:40:33,729 INFO L226 Difference]: Without dead ends: 1971 [2021-07-13 20:40:33,730 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 1200.8ms TimeCoverageRelationStatistics Valid=171, Invalid=641, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:40:33,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1971 states. [2021-07-13 20:40:33,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1971 to 1499. [2021-07-13 20:40:33,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1499 states, 1498 states have (on average 3.3317757009345796) internal successors, (4991), 1498 states have internal predecessors, (4991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:33,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1499 states to 1499 states and 4991 transitions. [2021-07-13 20:40:33,750 INFO L78 Accepts]: Start accepts. Automaton has 1499 states and 4991 transitions. Word has length 26 [2021-07-13 20:40:33,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:33,750 INFO L482 AbstractCegarLoop]: Abstraction has 1499 states and 4991 transitions. [2021-07-13 20:40:33,750 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 20:40:33,750 INFO L276 IsEmpty]: Start isEmpty. Operand 1499 states and 4991 transitions. [2021-07-13 20:40:33,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:40:33,752 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:33,752 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 20:40:33,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1098,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:40:33,967 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:33,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:33,968 INFO L82 PathProgramCache]: Analyzing trace with hash -224872725, now seen corresponding path program 24 times [2021-07-13 20:40:33,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:33,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723156973] [2021-07-13 20:40:33,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:33,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:34,396 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 60 [2021-07-13 20:40:34,660 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 53 [2021-07-13 20:40:34,884 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 64 [2021-07-13 20:40:35,108 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 20:40:35,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:35,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723156973] [2021-07-13 20:40:35,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723156973] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:35,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972152138] [2021-07-13 20:40:35,108 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 20:40:35,140 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:40:35,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:35,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:40:35,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:35,544 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-07-13 20:40:35,839 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 96 [2021-07-13 20:40:35,928 INFO L446 ElimStorePlain]: Different costs {2=[A, v_prenex_125], 6=[v_prenex_123, v_prenex_124, v_prenex_126]} [2021-07-13 20:40:35,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:35,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:35,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 16 [2021-07-13 20:40:35,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:36,103 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 86 [2021-07-13 20:40:36,103 INFO L628 ElimStorePlain]: treesize reduction 263, result has 47.9 percent of original size [2021-07-13 20:40:36,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:36,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:36,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 35 treesize of output 21 [2021-07-13 20:40:36,109 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:36,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:36,203 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-07-13 20:40:36,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 35 [2021-07-13 20:40:36,205 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:36,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:36,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:36,278 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-07-13 20:40:36,278 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 43 [2021-07-13 20:40:36,279 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:36,330 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:36,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:36,347 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-07-13 20:40:36,347 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 69 treesize of output 48 [2021-07-13 20:40:36,348 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:36,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:36,395 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:40:36,395 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 10 variables, input treesize:521, output treesize:74 [2021-07-13 20:40:36,474 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 20:40:36,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972152138] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:36,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:36,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:40:36,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158602827] [2021-07-13 20:40:36,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:40:36,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:36,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:40:36,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:40:36,475 INFO L87 Difference]: Start difference. First operand 1499 states and 4991 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 20:40:37,172 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2021-07-13 20:40:37,551 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-07-13 20:40:37,942 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 123 [2021-07-13 20:40:38,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:38,086 INFO L93 Difference]: Finished difference Result 1881 states and 6161 transitions. [2021-07-13 20:40:38,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:40:38,086 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 20:40:38,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:38,089 INFO L225 Difference]: With dead ends: 1881 [2021-07-13 20:40:38,089 INFO L226 Difference]: Without dead ends: 1866 [2021-07-13 20:40:38,089 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 2757.8ms TimeCoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:40:38,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1866 states. [2021-07-13 20:40:38,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1866 to 1508. [2021-07-13 20:40:38,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1508 states, 1507 states have (on average 3.33178500331785) internal successors, (5021), 1507 states have internal predecessors, (5021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:38,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1508 states to 1508 states and 5021 transitions. [2021-07-13 20:40:38,109 INFO L78 Accepts]: Start accepts. Automaton has 1508 states and 5021 transitions. Word has length 26 [2021-07-13 20:40:38,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:38,109 INFO L482 AbstractCegarLoop]: Abstraction has 1508 states and 5021 transitions. [2021-07-13 20:40:38,109 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 20:40:38,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1508 states and 5021 transitions. [2021-07-13 20:40:38,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:40:38,111 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:38,111 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 20:40:38,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1125 [2021-07-13 20:40:38,343 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:38,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:38,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1842405505, now seen corresponding path program 25 times [2021-07-13 20:40:38,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:38,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386029988] [2021-07-13 20:40:38,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:38,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:38,579 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 52 [2021-07-13 20:40:38,717 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 46 [2021-07-13 20:40:38,953 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 20:40:38,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:38,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386029988] [2021-07-13 20:40:38,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386029988] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:38,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116098133] [2021-07-13 20:40:38,953 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 20:40:38,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:38,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:40:38,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:39,407 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-07-13 20:40:39,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:39,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:39,547 INFO L354 Elim1Store]: treesize reduction 21, result has 36.4 percent of original size [2021-07-13 20:40:39,547 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 6 new quantified variables, introduced 4 case distinctions, treesize of input 102 treesize of output 68 [2021-07-13 20:40:39,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:39,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:39,566 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-13 20:40:39,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 91 treesize of output 1 [2021-07-13 20:40:39,566 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:39,981 WARN L205 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 173 [2021-07-13 20:40:39,981 INFO L628 ElimStorePlain]: treesize reduction 703, result has 43.6 percent of original size [2021-07-13 20:40:39,995 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-07-13 20:40:39,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 38 [2021-07-13 20:40:39,997 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:40,133 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-07-13 20:40:40,134 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:40,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:40,150 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-07-13 20:40:40,151 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 4 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 35 [2021-07-13 20:40:40,153 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:40,411 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 150 [2021-07-13 20:40:40,412 INFO L628 ElimStorePlain]: treesize reduction 8, result has 98.4 percent of original size [2021-07-13 20:40:40,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:40,427 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-07-13 20:40:40,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 38 [2021-07-13 20:40:40,429 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:40,558 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2021-07-13 20:40:40,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:40,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:40,586 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-07-13 20:40:40,586 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 87 treesize of output 63 [2021-07-13 20:40:40,587 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:40,710 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2021-07-13 20:40:40,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:40,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:40,729 INFO L354 Elim1Store]: treesize reduction 33, result has 19.5 percent of original size [2021-07-13 20:40:40,729 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 51 [2021-07-13 20:40:40,730 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:40,845 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-07-13 20:40:40,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:40,858 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-07-13 20:40:40,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 41 [2021-07-13 20:40:40,860 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:40,968 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-07-13 20:40:40,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:40,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:40,989 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-07-13 20:40:40,989 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 55 [2021-07-13 20:40:40,991 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:41,095 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-07-13 20:40:41,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:41,103 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 20:40:41,103 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 16 variables, input treesize:1437, output treesize:216 [2021-07-13 20:40:41,245 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-07-13 20:40:41,323 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 20:40:41,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116098133] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:41,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:41,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:40:41,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604252911] [2021-07-13 20:40:41,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:40:41,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:41,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:40:41,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:40:41,323 INFO L87 Difference]: Start difference. First operand 1508 states and 5021 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 20:40:41,948 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 73 [2021-07-13 20:40:42,456 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-07-13 20:40:43,003 WARN L205 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 89 [2021-07-13 20:40:43,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:43,161 INFO L93 Difference]: Finished difference Result 2002 states and 6531 transitions. [2021-07-13 20:40:43,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:40:43,162 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 20:40:43,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:43,169 INFO L225 Difference]: With dead ends: 2002 [2021-07-13 20:40:43,169 INFO L226 Difference]: Without dead ends: 1983 [2021-07-13 20:40:43,169 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 2485.4ms TimeCoverageRelationStatistics Valid=203, Invalid=789, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:40:43,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1983 states. [2021-07-13 20:40:43,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1983 to 1511. [2021-07-13 20:40:43,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1511 states, 1510 states have (on average 3.3350993377483444) internal successors, (5036), 1510 states have internal predecessors, (5036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:43,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1511 states to 1511 states and 5036 transitions. [2021-07-13 20:40:43,197 INFO L78 Accepts]: Start accepts. Automaton has 1511 states and 5036 transitions. Word has length 26 [2021-07-13 20:40:43,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:43,197 INFO L482 AbstractCegarLoop]: Abstraction has 1511 states and 5036 transitions. [2021-07-13 20:40:43,197 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 20:40:43,197 INFO L276 IsEmpty]: Start isEmpty. Operand 1511 states and 5036 transitions. [2021-07-13 20:40:43,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:40:43,199 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:43,199 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 20:40:43,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1136 [2021-07-13 20:40:43,415 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:43,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:43,415 INFO L82 PathProgramCache]: Analyzing trace with hash 762618887, now seen corresponding path program 26 times [2021-07-13 20:40:43,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:43,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137201820] [2021-07-13 20:40:43,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:43,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:43,897 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 20:40:43,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:43,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137201820] [2021-07-13 20:40:43,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137201820] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:43,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904178905] [2021-07-13 20:40:43,898 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) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:40:43,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:40:43,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:43,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:40:43,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:44,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:44,161 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:44,161 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 31 treesize of output 27 [2021-07-13 20:40:44,162 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:44,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:44,174 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:40:44,174 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 20 [2021-07-13 20:40:44,176 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:44,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:44,185 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:40:44,185 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 20:40:44,185 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:44,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:44,195 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:40:44,195 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 44 treesize of output 26 [2021-07-13 20:40:44,195 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:44,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:44,206 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:44,206 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 39 treesize of output 31 [2021-07-13 20:40:44,207 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:44,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:44,218 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-07-13 20:40:44,219 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 30 treesize of output 21 [2021-07-13 20:40:44,219 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:44,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:44,230 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:44,230 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 44 treesize of output 34 [2021-07-13 20:40:44,232 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:44,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:44,241 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:40:44,241 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 35 treesize of output 1 [2021-07-13 20:40:44,242 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:44,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:44,249 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:40:44,250 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 18 [2021-07-13 20:40:44,250 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:44,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:44,258 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:40:44,259 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 20:40:44,259 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:44,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:44,267 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:40:44,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 13 [2021-07-13 20:40:44,268 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:44,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:44,276 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:40:44,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2021-07-13 20:40:44,277 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:44,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:44,285 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:40:44,286 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 41 treesize of output 25 [2021-07-13 20:40:44,286 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:44,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:44,295 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:40:44,295 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 26 treesize of output 1 [2021-07-13 20:40:44,295 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:44,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:44,303 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:40:44,303 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 35 treesize of output 21 [2021-07-13 20:40:44,303 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:44,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:44,309 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:40:44,309 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 20:40:44,309 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:44,383 INFO L628 ElimStorePlain]: treesize reduction 72, result has 52.6 percent of original size [2021-07-13 20:40:44,385 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:40:44,385 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:713, output treesize:80 [2021-07-13 20:40:44,519 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 20:40:44,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904178905] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:44,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:44,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-13 20:40:44,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148481270] [2021-07-13 20:40:44,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:40:44,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:44,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:40:44,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:40:44,520 INFO L87 Difference]: Start difference. First operand 1511 states and 5036 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 20:40:44,859 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 52 [2021-07-13 20:40:45,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:45,816 INFO L93 Difference]: Finished difference Result 2063 states and 6723 transitions. [2021-07-13 20:40:45,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:40:45,817 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 20:40:45,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:45,820 INFO L225 Difference]: With dead ends: 2063 [2021-07-13 20:40:45,820 INFO L226 Difference]: Without dead ends: 2038 [2021-07-13 20:40:45,820 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1553.4ms TimeCoverageRelationStatistics Valid=176, Invalid=816, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:40:45,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2038 states. [2021-07-13 20:40:45,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2038 to 1517. [2021-07-13 20:40:45,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1517 states, 1516 states have (on average 3.3337730870712403) internal successors, (5054), 1516 states have internal predecessors, (5054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:45,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1517 states to 1517 states and 5054 transitions. [2021-07-13 20:40:45,840 INFO L78 Accepts]: Start accepts. Automaton has 1517 states and 5054 transitions. Word has length 26 [2021-07-13 20:40:45,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:45,840 INFO L482 AbstractCegarLoop]: Abstraction has 1517 states and 5054 transitions. [2021-07-13 20:40:45,840 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 20:40:45,840 INFO L276 IsEmpty]: Start isEmpty. Operand 1517 states and 5054 transitions. [2021-07-13 20:40:45,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:40:45,842 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:45,842 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 20:40:46,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1166 [2021-07-13 20:40:46,052 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:46,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:46,053 INFO L82 PathProgramCache]: Analyzing trace with hash 2136387655, now seen corresponding path program 42 times [2021-07-13 20:40:46,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:46,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871436099] [2021-07-13 20:40:46,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:46,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:46,453 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 20:40:46,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:46,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871436099] [2021-07-13 20:40:46,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871436099] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:46,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669360814] [2021-07-13 20:40:46,454 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 20:40:46,479 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:40:46,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:46,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:40:46,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:47,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:47,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:47,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:47,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:47,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:47,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:47,016 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 67 treesize of output 35 [2021-07-13 20:40:47,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:47,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:47,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:47,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:47,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:47,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:47,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:47,024 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 60 treesize of output 32 [2021-07-13 20:40:47,024 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:47,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:47,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:47,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:47,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:47,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:47,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:47,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 26 [2021-07-13 20:40:47,032 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:47,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:47,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:47,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:47,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:47,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:47,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:47,041 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 48 treesize of output 21 [2021-07-13 20:40:47,042 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:47,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:47,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:47,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:47,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:47,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:47,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:47,050 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 15 [2021-07-13 20:40:47,051 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:47,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:47,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:47,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:47,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:47,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:47,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:47,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 29 [2021-07-13 20:40:47,060 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:47,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:47,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:47,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:47,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:47,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:47,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:47,068 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 46 treesize of output 26 [2021-07-13 20:40:47,069 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:47,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:47,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:47,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:47,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:47,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:47,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:47,077 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 65 treesize of output 30 [2021-07-13 20:40:47,077 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:47,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:47,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:47,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:47,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:47,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:47,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:47,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 29 [2021-07-13 20:40:47,086 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:47,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:47,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:47,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:47,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:47,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:47,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:47,094 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 63 treesize of output 35 [2021-07-13 20:40:47,095 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:47,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:47,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:47,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:47,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:47,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:47,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:47,103 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 77 treesize of output 30 [2021-07-13 20:40:47,104 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:47,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:47,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:47,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:47,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:47,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:47,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:47,113 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 58 treesize of output 32 [2021-07-13 20:40:47,113 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:47,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:47,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:47,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:47,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:47,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:47,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:47,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 21 [2021-07-13 20:40:47,124 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:47,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:47,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:47,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:47,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:47,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:47,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:47,132 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 65 treesize of output 30 [2021-07-13 20:40:47,133 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:47,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:47,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:47,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:47,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:47,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:47,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:47,141 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 55 treesize of output 29 [2021-07-13 20:40:47,141 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:47,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:47,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:47,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:47,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:47,146 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 46 treesize of output 21 [2021-07-13 20:40:47,147 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:47,189 INFO L628 ElimStorePlain]: treesize reduction 44, result has 49.4 percent of original size [2021-07-13 20:40:47,190 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 20:40:47,190 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:1121, output treesize:33 [2021-07-13 20:40:47,224 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 20:40:47,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669360814] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:47,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:47,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-07-13 20:40:47,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886593686] [2021-07-13 20:40:47,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:40:47,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:47,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:40:47,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:40:47,225 INFO L87 Difference]: Start difference. First operand 1517 states and 5054 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 20:40:48,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:48,412 INFO L93 Difference]: Finished difference Result 1955 states and 6355 transitions. [2021-07-13 20:40:48,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:40:48,413 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 20:40:48,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:48,416 INFO L225 Difference]: With dead ends: 1955 [2021-07-13 20:40:48,416 INFO L226 Difference]: Without dead ends: 1929 [2021-07-13 20:40:48,416 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1417.1ms TimeCoverageRelationStatistics Valid=246, Invalid=1014, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:40:48,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1929 states. [2021-07-13 20:40:48,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1929 to 1521. [2021-07-13 20:40:48,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1521 states, 1520 states have (on average 3.331578947368421) internal successors, (5064), 1520 states have internal predecessors, (5064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:48,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 5064 transitions. [2021-07-13 20:40:48,463 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 5064 transitions. Word has length 26 [2021-07-13 20:40:48,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:48,464 INFO L482 AbstractCegarLoop]: Abstraction has 1521 states and 5064 transitions. [2021-07-13 20:40:48,464 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 20:40:48,464 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 5064 transitions. [2021-07-13 20:40:48,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:40:48,466 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:48,466 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 20:40:48,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1178 [2021-07-13 20:40:48,682 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:48,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:48,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1090705077, now seen corresponding path program 43 times [2021-07-13 20:40:48,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:48,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885911445] [2021-07-13 20:40:48,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:48,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:49,086 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 20:40:49,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:49,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885911445] [2021-07-13 20:40:49,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885911445] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:49,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945800495] [2021-07-13 20:40:49,087 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:40:49,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:49,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:40:49,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:49,405 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_143], 6=[v_prenex_141, v_prenex_145]} [2021-07-13 20:40:49,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:49,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:49,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:49,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 46 treesize of output 21 [2021-07-13 20:40:49,411 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:49,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:49,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:49,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 39 treesize of output 21 [2021-07-13 20:40:49,415 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:49,503 INFO L628 ElimStorePlain]: treesize reduction 221, result has 44.2 percent of original size [2021-07-13 20:40:49,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:49,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-07-13 20:40:49,507 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:49,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:49,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:49,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:49,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:49,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:49,541 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 56 treesize of output 28 [2021-07-13 20:40:49,542 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:49,567 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:49,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:49,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:49,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:49,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:49,570 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 33 treesize of output 17 [2021-07-13 20:40:49,571 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:49,591 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:49,593 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 20:40:49,593 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:483, output treesize:57 [2021-07-13 20:40:49,634 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 20:40:49,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945800495] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:49,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:49,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-13 20:40:49,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039860973] [2021-07-13 20:40:49,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:40:49,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:49,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:40:49,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:40:49,635 INFO L87 Difference]: Start difference. First operand 1521 states and 5064 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 20:40:51,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:51,015 INFO L93 Difference]: Finished difference Result 2127 states and 6917 transitions. [2021-07-13 20:40:51,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:40:51,015 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 20:40:51,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:51,019 INFO L225 Difference]: With dead ends: 2127 [2021-07-13 20:40:51,019 INFO L226 Difference]: Without dead ends: 2112 [2021-07-13 20:40:51,019 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 1619.5ms TimeCoverageRelationStatistics Valid=322, Invalid=1318, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:40:51,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2112 states. [2021-07-13 20:40:51,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2112 to 1521. [2021-07-13 20:40:51,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1521 states, 1520 states have (on average 3.331578947368421) internal successors, (5064), 1520 states have internal predecessors, (5064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:51,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 5064 transitions. [2021-07-13 20:40:51,041 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 5064 transitions. Word has length 26 [2021-07-13 20:40:51,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:51,041 INFO L482 AbstractCegarLoop]: Abstraction has 1521 states and 5064 transitions. [2021-07-13 20:40:51,041 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 20:40:51,041 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 5064 transitions. [2021-07-13 20:40:51,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:40:51,043 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:51,043 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 20:40:51,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1284,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:40:51,259 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:51,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:51,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1679080501, now seen corresponding path program 27 times [2021-07-13 20:40:51,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:51,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865410295] [2021-07-13 20:40:51,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:51,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:51,477 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 46 [2021-07-13 20:40:51,667 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2021-07-13 20:40:51,957 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 20:40:51,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:51,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865410295] [2021-07-13 20:40:51,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865410295] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:51,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566030321] [2021-07-13 20:40:51,957 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 20:40:51,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:40:51,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:51,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:40:51,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:52,460 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-07-13 20:40:52,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:52,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:52,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:52,502 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-07-13 20:40:52,503 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:52,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:52,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:52,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 20 [2021-07-13 20:40:52,508 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:52,633 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-07-13 20:40:52,633 INFO L628 ElimStorePlain]: treesize reduction 39, result has 81.0 percent of original size [2021-07-13 20:40:52,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:52,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:52,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:52,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 15 [2021-07-13 20:40:52,640 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:52,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:52,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-07-13 20:40:52,645 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:52,727 INFO L628 ElimStorePlain]: treesize reduction 19, result has 86.2 percent of original size [2021-07-13 20:40:52,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:52,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:52,731 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 26 treesize of output 16 [2021-07-13 20:40:52,732 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:52,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:52,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:52,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:52,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 35 treesize of output 21 [2021-07-13 20:40:52,774 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:52,806 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:52,808 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 20:40:52,809 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:253, output treesize:59 [2021-07-13 20:40:52,876 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 20:40:52,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566030321] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:52,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:52,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:40:52,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115015791] [2021-07-13 20:40:52,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:40:52,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:52,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:40:52,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:40:52,877 INFO L87 Difference]: Start difference. First operand 1521 states and 5064 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 20:40:53,339 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2021-07-13 20:40:54,041 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 82 [2021-07-13 20:40:54,248 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-07-13 20:40:54,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:54,353 INFO L93 Difference]: Finished difference Result 1978 states and 6388 transitions. [2021-07-13 20:40:54,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:40:54,353 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 20:40:54,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:54,356 INFO L225 Difference]: With dead ends: 1978 [2021-07-13 20:40:54,356 INFO L226 Difference]: Without dead ends: 1963 [2021-07-13 20:40:54,357 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 2146.4ms TimeCoverageRelationStatistics Valid=203, Invalid=667, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:40:54,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1963 states. [2021-07-13 20:40:54,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1963 to 1529. [2021-07-13 20:40:54,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 3.329842931937173) internal successors, (5088), 1528 states have internal predecessors, (5088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:54,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 5088 transitions. [2021-07-13 20:40:54,376 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 5088 transitions. Word has length 26 [2021-07-13 20:40:54,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:54,376 INFO L482 AbstractCegarLoop]: Abstraction has 1529 states and 5088 transitions. [2021-07-13 20:40:54,376 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 20:40:54,376 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 5088 transitions. [2021-07-13 20:40:54,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:40:54,378 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:54,378 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 20:40:54,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1298 [2021-07-13 20:40:54,593 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:54,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:54,593 INFO L82 PathProgramCache]: Analyzing trace with hash -128698937, now seen corresponding path program 44 times [2021-07-13 20:40:54,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:54,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807582450] [2021-07-13 20:40:54,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:54,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:54,927 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 20:40:54,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:54,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807582450] [2021-07-13 20:40:54,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807582450] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:54,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564044998] [2021-07-13 20:40:54,928 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 20:40:54,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:40:54,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:54,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-13 20:40:54,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:55,333 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-07-13 20:40:55,610 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_170, v_prenex_172, v_prenex_162, v_prenex_164], 5=[A, v_prenex_175, v_prenex_166, v_prenex_168]} [2021-07-13 20:40:55,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:55,636 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:40:55,636 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 30 treesize of output 30 [2021-07-13 20:40:55,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:55,968 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 156 [2021-07-13 20:40:55,969 INFO L628 ElimStorePlain]: treesize reduction 7, result has 98.5 percent of original size [2021-07-13 20:40:55,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:55,988 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:55,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 31 [2021-07-13 20:40:55,993 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-13 20:40:56,365 WARN L205 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 151 [2021-07-13 20:40:56,366 INFO L628 ElimStorePlain]: treesize reduction 7, result has 98.5 percent of original size [2021-07-13 20:40:56,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:56,391 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:40:56,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 20:40:56,393 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:56,575 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2021-07-13 20:40:56,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:56,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:56,598 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:40:56,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 23 [2021-07-13 20:40:56,600 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:56,777 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2021-07-13 20:40:56,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:56,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:56,804 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:40:56,804 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 33 treesize of output 31 [2021-07-13 20:40:56,807 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:57,162 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 134 [2021-07-13 20:40:57,162 INFO L628 ElimStorePlain]: treesize reduction 8, result has 98.2 percent of original size [2021-07-13 20:40:57,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:57,203 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:40:57,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 32 [2021-07-13 20:40:57,204 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:57,355 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-07-13 20:40:57,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:57,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:57,373 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:57,374 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 42 treesize of output 40 [2021-07-13 20:40:57,377 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:57,542 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2021-07-13 20:40:57,543 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:57,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:57,561 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:40:57,561 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 33 treesize of output 31 [2021-07-13 20:40:57,564 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:57,719 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-07-13 20:40:57,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:57,748 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:40:57,748 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 17 variables, input treesize:473, output treesize:269 [2021-07-13 20:40:57,912 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 20:40:57,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564044998] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:57,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:57,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:40:57,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018726697] [2021-07-13 20:40:57,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:40:57,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:57,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:40:57,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:40:57,913 INFO L87 Difference]: Start difference. First operand 1529 states and 5088 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 20:40:58,859 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 47 [2021-07-13 20:41:00,101 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 45 [2021-07-13 20:41:00,588 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 64 [2021-07-13 20:41:00,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:00,958 INFO L93 Difference]: Finished difference Result 2479 states and 7802 transitions. [2021-07-13 20:41:00,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:41:00,958 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 20:41:00,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:00,962 INFO L225 Difference]: With dead ends: 2479 [2021-07-13 20:41:00,962 INFO L226 Difference]: Without dead ends: 2435 [2021-07-13 20:41:00,968 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 3097.2ms TimeCoverageRelationStatistics Valid=513, Invalid=2567, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 20:41:00,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2435 states. [2021-07-13 20:41:00,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2435 to 1529. [2021-07-13 20:41:00,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 3.329842931937173) internal successors, (5088), 1528 states have internal predecessors, (5088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:00,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 5088 transitions. [2021-07-13 20:41:00,990 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 5088 transitions. Word has length 26 [2021-07-13 20:41:00,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:00,990 INFO L482 AbstractCegarLoop]: Abstraction has 1529 states and 5088 transitions. [2021-07-13 20:41:00,991 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 20:41:00,991 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 5088 transitions. [2021-07-13 20:41:00,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:41:00,992 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:00,992 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 20:41:01,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1306,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:01,195 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:01,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:01,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1105017781, now seen corresponding path program 45 times [2021-07-13 20:41:01,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:01,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39843334] [2021-07-13 20:41:01,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:01,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:01,539 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 20:41:01,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:01,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39843334] [2021-07-13 20:41:01,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39843334] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:01,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75109580] [2021-07-13 20:41:01,540 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 20:41:01,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:41:01,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:01,566 WARN L261 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-13 20:41:01,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:02,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:02,265 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-07-13 20:41:02,265 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 54 [2021-07-13 20:41:02,269 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:02,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:02,313 INFO L354 Elim1Store]: treesize reduction 12, result has 73.3 percent of original size [2021-07-13 20:41:02,313 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 57 treesize of output 67 [2021-07-13 20:41:02,331 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:02,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:02,374 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-07-13 20:41:02,374 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 54 treesize of output 60 [2021-07-13 20:41:02,382 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:02,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:02,428 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-07-13 20:41:02,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 49 treesize of output 57 [2021-07-13 20:41:02,434 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:02,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:02,478 INFO L354 Elim1Store]: treesize reduction 21, result has 53.3 percent of original size [2021-07-13 20:41:02,478 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 47 treesize of output 52 [2021-07-13 20:41:02,480 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:02,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:02,528 INFO L354 Elim1Store]: treesize reduction 12, result has 73.3 percent of original size [2021-07-13 20:41:02,528 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 59 treesize of output 67 [2021-07-13 20:41:02,535 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:02,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:02,576 INFO L354 Elim1Store]: treesize reduction 27, result has 40.0 percent of original size [2021-07-13 20:41:02,577 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 44 treesize of output 43 [2021-07-13 20:41:02,579 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:02,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:02,624 INFO L354 Elim1Store]: treesize reduction 23, result has 48.9 percent of original size [2021-07-13 20:41:02,625 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 49 treesize of output 50 [2021-07-13 20:41:02,626 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:02,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:02,684 INFO L354 Elim1Store]: treesize reduction 12, result has 73.3 percent of original size [2021-07-13 20:41:02,685 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 59 treesize of output 67 [2021-07-13 20:41:02,697 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:02,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:02,759 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-07-13 20:41:02,759 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 69 treesize of output 77 [2021-07-13 20:41:02,788 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:02,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:02,814 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-07-13 20:41:02,814 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 47 treesize of output 1 [2021-07-13 20:41:02,814 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:02,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:02,841 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-07-13 20:41:02,842 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 1 [2021-07-13 20:41:02,842 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:02,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:02,868 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-07-13 20:41:02,868 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 1 [2021-07-13 20:41:02,869 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:02,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:02,893 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-07-13 20:41:02,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 1 [2021-07-13 20:41:02,894 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:02,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:02,920 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-07-13 20:41:02,920 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 59 treesize of output 1 [2021-07-13 20:41:02,920 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:02,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:02,935 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-07-13 20:41:02,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 52 treesize of output 1 [2021-07-13 20:41:02,936 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:03,452 WARN L205 SmtUtils]: Spent 515.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 96 [2021-07-13 20:41:03,452 INFO L628 ElimStorePlain]: treesize reduction 622, result has 44.9 percent of original size [2021-07-13 20:41:03,508 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 20:41:03,508 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:1289, output treesize:912 [2021-07-13 20:41:03,970 WARN L205 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 93 [2021-07-13 20:41:04,126 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2021-07-13 20:41:04,200 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 20:41:04,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75109580] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:04,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:04,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-13 20:41:04,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893588074] [2021-07-13 20:41:04,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:41:04,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:04,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:41:04,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:41:04,201 INFO L87 Difference]: Start difference. First operand 1529 states and 5088 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 20:41:05,784 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-07-13 20:41:05,907 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-07-13 20:41:06,043 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2021-07-13 20:41:06,192 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 69 [2021-07-13 20:41:06,532 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2021-07-13 20:41:06,692 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2021-07-13 20:41:06,872 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2021-07-13 20:41:07,126 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2021-07-13 20:41:07,367 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2021-07-13 20:41:07,874 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 85 [2021-07-13 20:41:08,314 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 68 [2021-07-13 20:41:08,557 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 63 [2021-07-13 20:41:08,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:08,696 INFO L93 Difference]: Finished difference Result 2975 states and 9347 transitions. [2021-07-13 20:41:08,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:41:08,697 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 20:41:08,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:08,702 INFO L225 Difference]: With dead ends: 2975 [2021-07-13 20:41:08,702 INFO L226 Difference]: Without dead ends: 2945 [2021-07-13 20:41:08,702 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 4714.0ms TimeCoverageRelationStatistics Valid=517, Invalid=2789, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:41:08,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2945 states. [2021-07-13 20:41:08,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2945 to 1537. [2021-07-13 20:41:08,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1537 states, 1536 states have (on average 3.3430989583333335) internal successors, (5135), 1536 states have internal predecessors, (5135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:08,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1537 states to 1537 states and 5135 transitions. [2021-07-13 20:41:08,729 INFO L78 Accepts]: Start accepts. Automaton has 1537 states and 5135 transitions. Word has length 26 [2021-07-13 20:41:08,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:08,729 INFO L482 AbstractCegarLoop]: Abstraction has 1537 states and 5135 transitions. [2021-07-13 20:41:08,729 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 20:41:08,729 INFO L276 IsEmpty]: Start isEmpty. Operand 1537 states and 5135 transitions. [2021-07-13 20:41:08,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:41:08,731 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:08,731 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 20:41:08,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1341 [2021-07-13 20:41:08,945 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:08,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:08,945 INFO L82 PathProgramCache]: Analyzing trace with hash -89210125, now seen corresponding path program 28 times [2021-07-13 20:41:08,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:08,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282159254] [2021-07-13 20:41:08,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:08,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:09,498 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 20:41:09,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:09,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282159254] [2021-07-13 20:41:09,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282159254] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:09,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201862339] [2021-07-13 20:41:09,499 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 20:41:09,523 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:41:09,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:09,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:41:09,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:09,849 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-07-13 20:41:10,041 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 60 [2021-07-13 20:41:10,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:10,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:10,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-07-13 20:41:10,110 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:10,248 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-07-13 20:41:10,248 INFO L628 ElimStorePlain]: treesize reduction 65, result has 72.1 percent of original size [2021-07-13 20:41:10,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:10,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:10,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 20 [2021-07-13 20:41:10,254 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:10,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:10,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:10,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:10,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:10,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 15 [2021-07-13 20:41:10,315 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:10,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:10,319 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 16 treesize of output 10 [2021-07-13 20:41:10,319 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:10,386 INFO L628 ElimStorePlain]: treesize reduction 19, result has 83.9 percent of original size [2021-07-13 20:41:10,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:10,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:10,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 16 [2021-07-13 20:41:10,390 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:10,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:10,421 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 20:41:10,421 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:253, output treesize:59 [2021-07-13 20:41:10,481 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 20:41:10,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201862339] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:10,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:10,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:41:10,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604359625] [2021-07-13 20:41:10,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:41:10,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:10,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:41:10,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:41:10,482 INFO L87 Difference]: Start difference. First operand 1537 states and 5135 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 20:41:10,980 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2021-07-13 20:41:11,214 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 75 [2021-07-13 20:41:11,529 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2021-07-13 20:41:12,009 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-07-13 20:41:12,168 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2021-07-13 20:41:12,457 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 92 [2021-07-13 20:41:12,696 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 80 [2021-07-13 20:41:12,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:12,847 INFO L93 Difference]: Finished difference Result 2083 states and 6714 transitions. [2021-07-13 20:41:12,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:41:12,848 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 20:41:12,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:12,851 INFO L225 Difference]: With dead ends: 2083 [2021-07-13 20:41:12,851 INFO L226 Difference]: Without dead ends: 2068 [2021-07-13 20:41:12,851 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 2728.8ms TimeCoverageRelationStatistics Valid=237, Invalid=819, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:41:12,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2068 states. [2021-07-13 20:41:12,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2068 to 1540. [2021-07-13 20:41:12,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1540 states, 1539 states have (on average 3.3443794671864846) internal successors, (5147), 1539 states have internal predecessors, (5147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:12,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1540 states to 1540 states and 5147 transitions. [2021-07-13 20:41:12,872 INFO L78 Accepts]: Start accepts. Automaton has 1540 states and 5147 transitions. Word has length 26 [2021-07-13 20:41:12,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:12,872 INFO L482 AbstractCegarLoop]: Abstraction has 1540 states and 5147 transitions. [2021-07-13 20:41:12,872 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 20:41:12,872 INFO L276 IsEmpty]: Start isEmpty. Operand 1540 states and 5147 transitions. [2021-07-13 20:41:12,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:41:12,874 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:12,874 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 20:41:13,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1509,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:13,089 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:13,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:13,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1706742905, now seen corresponding path program 29 times [2021-07-13 20:41:13,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:13,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800569993] [2021-07-13 20:41:13,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:13,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:13,430 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2021-07-13 20:41:13,651 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 20:41:13,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:13,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800569993] [2021-07-13 20:41:13,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800569993] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:13,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614941023] [2021-07-13 20:41:13,651 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:41:13,676 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:41:13,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:13,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:41:13,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:14,072 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-07-13 20:41:14,304 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-07-13 20:41:14,378 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-07-13 20:41:14,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 46 [2021-07-13 20:41:14,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:14,524 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2021-07-13 20:41:14,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:14,540 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-07-13 20:41:14,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 43 [2021-07-13 20:41:14,541 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:14,683 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2021-07-13 20:41:14,684 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:14,701 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-07-13 20:41:14,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 57 [2021-07-13 20:41:14,704 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:14,858 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2021-07-13 20:41:14,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:14,874 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-07-13 20:41:14,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 106 treesize of output 65 [2021-07-13 20:41:14,876 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:15,010 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-07-13 20:41:15,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:15,026 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-07-13 20:41:15,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 50 [2021-07-13 20:41:15,027 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:15,156 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-07-13 20:41:15,156 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:15,171 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-07-13 20:41:15,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 106 treesize of output 65 [2021-07-13 20:41:15,173 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:15,295 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-07-13 20:41:15,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:15,308 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-07-13 20:41:15,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 53 [2021-07-13 20:41:15,310 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:15,419 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-07-13 20:41:15,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:15,433 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-07-13 20:41:15,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 47 [2021-07-13 20:41:15,436 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:15,642 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-07-13 20:41:15,642 INFO L628 ElimStorePlain]: treesize reduction 8, result has 96.6 percent of original size [2021-07-13 20:41:15,650 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 20:41:15,650 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:687, output treesize:216 [2021-07-13 20:41:15,778 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2021-07-13 20:41:15,856 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 20:41:15,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614941023] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:15,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:15,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:41:15,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756404712] [2021-07-13 20:41:15,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:41:15,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:15,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:41:15,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:41:15,856 INFO L87 Difference]: Start difference. First operand 1540 states and 5147 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 20:41:16,352 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 70 [2021-07-13 20:41:16,631 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2021-07-13 20:41:17,172 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 46 [2021-07-13 20:41:17,853 WARN L205 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 97 [2021-07-13 20:41:18,312 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 124 [2021-07-13 20:41:18,840 WARN L205 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 111 [2021-07-13 20:41:19,403 WARN L205 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 128 [2021-07-13 20:41:20,045 WARN L205 SmtUtils]: Spent 594.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 123 [2021-07-13 20:41:20,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:20,470 INFO L93 Difference]: Finished difference Result 2320 states and 7403 transitions. [2021-07-13 20:41:20,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:41:20,470 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 20:41:20,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:20,474 INFO L225 Difference]: With dead ends: 2320 [2021-07-13 20:41:20,474 INFO L226 Difference]: Without dead ends: 2301 [2021-07-13 20:41:20,475 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 5003.0ms TimeCoverageRelationStatistics Valid=334, Invalid=1306, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:41:20,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2301 states. [2021-07-13 20:41:20,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2301 to 1535. [2021-07-13 20:41:20,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1535 states, 1534 states have (on average 3.3428943937418514) internal successors, (5128), 1534 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 20:41:20,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1535 states to 1535 states and 5128 transitions. [2021-07-13 20:41:20,498 INFO L78 Accepts]: Start accepts. Automaton has 1535 states and 5128 transitions. Word has length 26 [2021-07-13 20:41:20,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:20,498 INFO L482 AbstractCegarLoop]: Abstraction has 1535 states and 5128 transitions. [2021-07-13 20:41:20,498 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 20:41:20,498 INFO L276 IsEmpty]: Start isEmpty. Operand 1535 states and 5128 transitions. [2021-07-13 20:41:20,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:41:20,500 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:20,500 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 20:41:20,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1518,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:20,702 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:20,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:20,702 INFO L82 PathProgramCache]: Analyzing trace with hash 97294587, now seen corresponding path program 46 times [2021-07-13 20:41:20,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:20,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874281115] [2021-07-13 20:41:20,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:20,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:21,182 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 20:41:21,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:21,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874281115] [2021-07-13 20:41:21,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874281115] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:21,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932821833] [2021-07-13 20:41:21,183 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:41:21,207 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:41:21,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:21,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:41:21,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:21,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:21,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:21,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:21,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:21,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:21,757 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 55 treesize of output 24 [2021-07-13 20:41:21,758 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:21,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:21,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:21,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:21,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:21,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:21,764 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 18 [2021-07-13 20:41:21,765 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:21,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:21,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:21,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:21,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:21,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:21,771 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 53 treesize of output 24 [2021-07-13 20:41:21,771 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:21,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:21,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:21,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:21,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:21,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:21,778 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 44 treesize of output 14 [2021-07-13 20:41:21,778 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:21,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:21,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:21,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:21,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:21,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:21,785 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 40 treesize of output 20 [2021-07-13 20:41:21,785 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:21,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:21,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:21,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:21,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:21,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:21,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 23 [2021-07-13 20:41:21,793 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:21,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:21,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:21,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:21,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:21,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:21,799 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 18 [2021-07-13 20:41:21,800 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:21,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:21,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:21,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:21,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:21,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:21,807 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 56 treesize of output 28 [2021-07-13 20:41:21,808 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:21,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:21,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:21,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:21,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:21,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:21,814 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 51 treesize of output 25 [2021-07-13 20:41:21,815 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:21,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:21,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:21,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:21,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:21,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:21,822 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 25 [2021-07-13 20:41:21,822 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:21,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:21,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:21,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:21,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:21,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:21,829 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 52 treesize of output 28 [2021-07-13 20:41:21,830 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:21,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:21,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:21,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:21,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:21,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:21,836 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 23 [2021-07-13 20:41:21,837 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:21,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:21,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:21,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:21,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:21,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:21,844 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 44 treesize of output 18 [2021-07-13 20:41:21,845 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:21,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:21,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:21,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:21,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:21,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:21,852 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 12 [2021-07-13 20:41:21,852 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:21,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:21,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:21,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:21,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:21,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:21,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 20 [2021-07-13 20:41:21,859 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:21,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:21,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:21,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:21,863 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 64 treesize of output 24 [2021-07-13 20:41:21,864 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:21,905 INFO L628 ElimStorePlain]: treesize reduction 40, result has 49.4 percent of original size [2021-07-13 20:41:21,906 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 20:41:21,906 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:937, output treesize:27 [2021-07-13 20:41:21,945 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 20:41:21,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932821833] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:21,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:21,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-07-13 20:41:21,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717867320] [2021-07-13 20:41:21,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:41:21,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:21,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:41:21,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:41:21,946 INFO L87 Difference]: Start difference. First operand 1535 states and 5128 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 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 20:41:24,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:24,080 INFO L93 Difference]: Finished difference Result 3148 states and 9991 transitions. [2021-07-13 20:41:24,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 20:41:24,080 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 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 20:41:24,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:24,085 INFO L225 Difference]: With dead ends: 3148 [2021-07-13 20:41:24,085 INFO L226 Difference]: Without dead ends: 3112 [2021-07-13 20:41:24,085 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 2188.2ms TimeCoverageRelationStatistics Valid=438, Invalid=1914, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:41:24,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3112 states. [2021-07-13 20:41:24,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3112 to 1630. [2021-07-13 20:41:24,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1630 states, 1629 states have (on average 3.365254757519951) internal successors, (5482), 1629 states have internal predecessors, (5482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:24,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1630 states to 1630 states and 5482 transitions. [2021-07-13 20:41:24,114 INFO L78 Accepts]: Start accepts. Automaton has 1630 states and 5482 transitions. Word has length 26 [2021-07-13 20:41:24,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:24,114 INFO L482 AbstractCegarLoop]: Abstraction has 1630 states and 5482 transitions. [2021-07-13 20:41:24,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 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 20:41:24,114 INFO L276 IsEmpty]: Start isEmpty. Operand 1630 states and 5482 transitions. [2021-07-13 20:41:24,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:41:24,116 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:24,117 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 20:41:24,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1532,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:24,332 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:24,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:24,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1930943239, now seen corresponding path program 47 times [2021-07-13 20:41:24,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:24,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004609939] [2021-07-13 20:41:24,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:24,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:24,785 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 20:41:24,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:24,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004609939] [2021-07-13 20:41:24,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004609939] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:24,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392450931] [2021-07-13 20:41:24,785 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 20:41:24,810 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:41:24,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:24,811 WARN L261 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 20:41:24,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:25,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:25,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:25,381 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-13 20:41:25,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 44 [2021-07-13 20:41:25,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:25,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:25,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:25,401 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:41:25,401 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 20:41:25,402 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:25,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:25,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:25,419 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:41:25,419 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 20:41:25,419 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:25,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:25,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:25,435 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:41:25,435 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 38 treesize of output 1 [2021-07-13 20:41:25,436 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:25,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:25,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:25,460 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-07-13 20:41:25,460 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 55 treesize of output 39 [2021-07-13 20:41:25,461 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:25,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:25,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:25,485 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-07-13 20:41:25,485 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 44 treesize of output 30 [2021-07-13 20:41:25,486 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:25,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:25,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:25,501 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:41:25,502 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 51 treesize of output 1 [2021-07-13 20:41:25,502 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:25,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:25,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:25,528 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:25,528 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 64 treesize of output 60 [2021-07-13 20:41:25,537 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:25,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:25,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:25,552 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:41:25,552 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 44 treesize of output 22 [2021-07-13 20:41:25,553 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:25,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:25,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:25,567 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:41:25,568 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 40 treesize of output 20 [2021-07-13 20:41:25,569 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:25,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:25,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:25,585 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:41:25,585 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 47 treesize of output 1 [2021-07-13 20:41:25,586 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:25,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:25,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:25,621 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:41:25,621 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 56 treesize of output 1 [2021-07-13 20:41:25,622 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:25,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:25,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:25,637 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:41:25,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 20:41:25,638 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:25,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:25,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:25,652 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:41:25,652 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 18 [2021-07-13 20:41:25,653 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:25,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:25,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:25,669 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:41:25,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 1 [2021-07-13 20:41:25,670 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:25,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:25,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:25,680 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:41:25,680 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 39 treesize of output 1 [2021-07-13 20:41:25,681 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:25,781 INFO L628 ElimStorePlain]: treesize reduction 130, result has 42.0 percent of original size [2021-07-13 20:41:25,784 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:41:25,784 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:1065, output treesize:93 [2021-07-13 20:41:25,949 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 20:41:25,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392450931] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:25,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:25,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-13 20:41:25,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687641407] [2021-07-13 20:41:25,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:41:25,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:25,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:41:25,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:41:25,950 INFO L87 Difference]: Start difference. First operand 1630 states and 5482 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 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 20:41:27,577 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2021-07-13 20:41:27,956 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2021-07-13 20:41:28,085 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2021-07-13 20:41:28,216 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-07-13 20:41:28,446 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2021-07-13 20:41:28,693 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2021-07-13 20:41:28,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:28,822 INFO L93 Difference]: Finished difference Result 3759 states and 11877 transitions. [2021-07-13 20:41:28,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:41:28,822 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 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 20:41:28,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:28,829 INFO L225 Difference]: With dead ends: 3759 [2021-07-13 20:41:28,829 INFO L226 Difference]: Without dead ends: 3702 [2021-07-13 20:41:28,829 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 3002.9ms TimeCoverageRelationStatistics Valid=575, Invalid=2395, Unknown=0, NotChecked=0, Total=2970 [2021-07-13 20:41:28,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3702 states. [2021-07-13 20:41:28,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3702 to 1786. [2021-07-13 20:41:28,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1786 states, 1785 states have (on average 3.3871148459383753) internal successors, (6046), 1785 states have internal predecessors, (6046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:28,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1786 states to 1786 states and 6046 transitions. [2021-07-13 20:41:28,865 INFO L78 Accepts]: Start accepts. Automaton has 1786 states and 6046 transitions. Word has length 26 [2021-07-13 20:41:28,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:28,865 INFO L482 AbstractCegarLoop]: Abstraction has 1786 states and 6046 transitions. [2021-07-13 20:41:28,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 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 20:41:28,865 INFO L276 IsEmpty]: Start isEmpty. Operand 1786 states and 6046 transitions. [2021-07-13 20:41:28,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:41:28,867 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:28,868 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 20:41:29,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1646,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:29,083 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:29,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:29,083 INFO L82 PathProgramCache]: Analyzing trace with hash -513521361, now seen corresponding path program 30 times [2021-07-13 20:41:29,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:29,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284966194] [2021-07-13 20:41:29,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:29,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:29,448 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 52 [2021-07-13 20:41:29,641 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 63 [2021-07-13 20:41:29,821 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 61 [2021-07-13 20:41:30,110 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 20:41:30,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:30,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284966194] [2021-07-13 20:41:30,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284966194] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:30,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061659654] [2021-07-13 20:41:30,110 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 20:41:30,135 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:41:30,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:30,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:41:30,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:30,622 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-07-13 20:41:30,895 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2021-07-13 20:41:31,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:31,118 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-13 20:41:31,118 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 72 treesize of output 1 [2021-07-13 20:41:31,119 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:31,154 INFO L354 Elim1Store]: treesize reduction 33, result has 32.7 percent of original size [2021-07-13 20:41:31,154 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 68 [2021-07-13 20:41:31,155 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:31,674 WARN L205 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 179 [2021-07-13 20:41:31,674 INFO L628 ElimStorePlain]: treesize reduction 697, result has 46.5 percent of original size [2021-07-13 20:41:31,698 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-07-13 20:41:31,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 60 [2021-07-13 20:41:31,700 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:31,866 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2021-07-13 20:41:31,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:31,889 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-07-13 20:41:31,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 50 [2021-07-13 20:41:31,891 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:32,052 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2021-07-13 20:41:32,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:32,085 INFO L354 Elim1Store]: treesize reduction 29, result has 40.8 percent of original size [2021-07-13 20:41:32,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 74 [2021-07-13 20:41:32,087 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:32,247 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2021-07-13 20:41:32,247 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:32,272 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-07-13 20:41:32,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 51 [2021-07-13 20:41:32,276 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:32,430 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-07-13 20:41:32,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:32,458 INFO L354 Elim1Store]: treesize reduction 33, result has 32.7 percent of original size [2021-07-13 20:41:32,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 83 treesize of output 67 [2021-07-13 20:41:32,460 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:32,605 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-13 20:41:32,605 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:32,625 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-07-13 20:41:32,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 46 [2021-07-13 20:41:32,627 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:32,777 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-07-13 20:41:32,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:32,806 INFO L354 Elim1Store]: treesize reduction 33, result has 32.7 percent of original size [2021-07-13 20:41:32,806 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 62 [2021-07-13 20:41:32,808 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:32,952 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-07-13 20:41:32,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:32,967 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 20:41:32,967 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 16 variables, input treesize:1441, output treesize:516 [2021-07-13 20:41:33,196 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2021-07-13 20:41:33,318 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 20:41:33,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061659654] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:33,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:33,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-07-13 20:41:33,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020832083] [2021-07-13 20:41:33,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:41:33,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:33,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:41:33,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:41:33,319 INFO L87 Difference]: Start difference. First operand 1786 states and 6046 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 20:41:33,884 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 53 [2021-07-13 20:41:34,213 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 54 [2021-07-13 20:41:34,651 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2021-07-13 20:41:35,060 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2021-07-13 20:41:35,411 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 92 [2021-07-13 20:41:35,677 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-07-13 20:41:35,999 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 91 [2021-07-13 20:41:36,583 WARN L205 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 126 [2021-07-13 20:41:37,849 WARN L205 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 241 DAG size of output: 229 [2021-07-13 20:41:38,426 WARN L205 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 152 [2021-07-13 20:41:39,326 WARN L205 SmtUtils]: Spent 613.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 160 [2021-07-13 20:41:41,126 WARN L205 SmtUtils]: Spent 1.63 s on a formula simplification. DAG size of input: 286 DAG size of output: 266 [2021-07-13 20:41:42,569 WARN L205 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 262 DAG size of output: 240 [2021-07-13 20:41:43,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:43,624 INFO L93 Difference]: Finished difference Result 2363 states and 7775 transitions. [2021-07-13 20:41:43,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:41:43,624 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 20:41:43,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:43,628 INFO L225 Difference]: With dead ends: 2363 [2021-07-13 20:41:43,628 INFO L226 Difference]: Without dead ends: 2333 [2021-07-13 20:41:43,629 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 10106.2ms TimeCoverageRelationStatistics Valid=297, Invalid=1683, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:41:43,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2333 states. [2021-07-13 20:41:43,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2333 to 1795. [2021-07-13 20:41:43,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1795 states, 1794 states have (on average 3.3851727982162765) internal successors, (6073), 1794 states have internal predecessors, (6073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:43,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1795 states to 1795 states and 6073 transitions. [2021-07-13 20:41:43,654 INFO L78 Accepts]: Start accepts. Automaton has 1795 states and 6073 transitions. Word has length 26 [2021-07-13 20:41:43,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:43,654 INFO L482 AbstractCegarLoop]: Abstraction has 1795 states and 6073 transitions. [2021-07-13 20:41:43,654 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 20:41:43,654 INFO L276 IsEmpty]: Start isEmpty. Operand 1795 states and 6073 transitions. [2021-07-13 20:41:43,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:41:43,657 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:43,657 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 20:41:43,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1769 [2021-07-13 20:41:43,872 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:43,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:43,872 INFO L82 PathProgramCache]: Analyzing trace with hash -2131054141, now seen corresponding path program 31 times [2021-07-13 20:41:43,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:43,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276641156] [2021-07-13 20:41:43,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:43,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:44,130 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2021-07-13 20:41:44,348 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2021-07-13 20:41:44,482 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2021-07-13 20:41:44,603 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 20:41:44,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:44,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276641156] [2021-07-13 20:41:44,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276641156] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:44,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903843455] [2021-07-13 20:41:44,603 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 20:41:44,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:44,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:41:44,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:45,110 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-13 20:41:45,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:45,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:45,251 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:41:45,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 64 treesize of output 1 [2021-07-13 20:41:45,251 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:45,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:45,283 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-07-13 20:41:45,283 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 75 treesize of output 60 [2021-07-13 20:41:45,285 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:45,725 WARN L205 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 177 [2021-07-13 20:41:45,725 INFO L628 ElimStorePlain]: treesize reduction 703, result has 45.7 percent of original size [2021-07-13 20:41:45,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:45,747 INFO L354 Elim1Store]: treesize reduction 33, result has 19.5 percent of original size [2021-07-13 20:41:45,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 51 [2021-07-13 20:41:45,749 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:45,891 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-07-13 20:41:45,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:45,906 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-07-13 20:41:45,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 38 [2021-07-13 20:41:45,907 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:46,043 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2021-07-13 20:41:46,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:46,062 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-07-13 20:41:46,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 42 [2021-07-13 20:41:46,065 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:46,342 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 138 [2021-07-13 20:41:46,342 INFO L628 ElimStorePlain]: treesize reduction 8, result has 98.3 percent of original size [2021-07-13 20:41:46,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:46,364 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-07-13 20:41:46,364 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 93 treesize of output 63 [2021-07-13 20:41:46,365 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:46,485 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-07-13 20:41:46,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:46,500 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-07-13 20:41:46,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 45 [2021-07-13 20:41:46,501 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:46,619 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-07-13 20:41:46,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:46,632 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-07-13 20:41:46,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 41 [2021-07-13 20:41:46,634 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:46,744 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-07-13 20:41:46,745 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:46,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:46,765 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-07-13 20:41:46,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 93 treesize of output 63 [2021-07-13 20:41:46,766 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:46,870 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-07-13 20:41:46,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:46,878 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 20:41:46,878 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 16 variables, input treesize:1437, output treesize:216 [2021-07-13 20:41:47,019 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 33 [2021-07-13 20:41:47,100 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 20:41:47,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903843455] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:47,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:47,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:41:47,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530927981] [2021-07-13 20:41:47,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:41:47,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:47,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:41:47,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:41:47,101 INFO L87 Difference]: Start difference. First operand 1795 states and 6073 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 20:41:47,379 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 71 [2021-07-13 20:41:47,784 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 50 [2021-07-13 20:41:48,555 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-07-13 20:41:48,927 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-07-13 20:41:49,352 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 134 [2021-07-13 20:41:49,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:49,836 INFO L93 Difference]: Finished difference Result 2510 states and 8287 transitions. [2021-07-13 20:41:49,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:41:49,836 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 20:41:49,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:49,841 INFO L225 Difference]: With dead ends: 2510 [2021-07-13 20:41:49,841 INFO L226 Difference]: Without dead ends: 2491 [2021-07-13 20:41:49,841 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 3155.4ms TimeCoverageRelationStatistics Valid=301, Invalid=1181, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:41:49,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2491 states. [2021-07-13 20:41:49,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2491 to 1795. [2021-07-13 20:41:49,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1795 states, 1794 states have (on average 3.3851727982162765) internal successors, (6073), 1794 states have internal predecessors, (6073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:49,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1795 states to 1795 states and 6073 transitions. [2021-07-13 20:41:49,871 INFO L78 Accepts]: Start accepts. Automaton has 1795 states and 6073 transitions. Word has length 26 [2021-07-13 20:41:49,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:49,871 INFO L482 AbstractCegarLoop]: Abstraction has 1795 states and 6073 transitions. [2021-07-13 20:41:49,871 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 20:41:49,871 INFO L276 IsEmpty]: Start isEmpty. Operand 1795 states and 6073 transitions. [2021-07-13 20:41:49,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:41:49,874 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:49,874 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 20:41:50,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1812,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:50,091 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:50,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:50,091 INFO L82 PathProgramCache]: Analyzing trace with hash 473970251, now seen corresponding path program 32 times [2021-07-13 20:41:50,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:50,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231804489] [2021-07-13 20:41:50,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:50,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:50,395 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2021-07-13 20:41:50,749 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 20:41:50,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:50,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231804489] [2021-07-13 20:41:50,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231804489] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:50,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774476226] [2021-07-13 20:41:50,750 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 20:41:50,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:41:50,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:50,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:41:50,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:51,171 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_238], 3=[v_prenex_239, A, v_prenex_237]} [2021-07-13 20:41:51,187 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:51,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 44 treesize of output 42 [2021-07-13 20:41:51,189 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:51,198 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:41:51,198 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 1 [2021-07-13 20:41:51,198 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:51,343 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-07-13 20:41:51,343 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:51,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:51,365 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:41:51,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 81 treesize of output 63 [2021-07-13 20:41:51,367 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:51,385 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-07-13 20:41:51,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 108 treesize of output 71 [2021-07-13 20:41:51,393 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:51,789 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 99 [2021-07-13 20:41:51,789 INFO L628 ElimStorePlain]: treesize reduction 8, result has 98.2 percent of original size [2021-07-13 20:41:51,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:51,806 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:51,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 57 [2021-07-13 20:41:51,809 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:51,826 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-07-13 20:41:51,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 56 [2021-07-13 20:41:51,828 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:52,057 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 84 [2021-07-13 20:41:52,058 INFO L628 ElimStorePlain]: treesize reduction 24, result has 93.4 percent of original size [2021-07-13 20:41:52,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:52,077 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:41:52,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 49 [2021-07-13 20:41:52,078 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:52,094 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-07-13 20:41:52,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 56 [2021-07-13 20:41:52,095 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:52,293 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2021-07-13 20:41:52,293 INFO L628 ElimStorePlain]: treesize reduction 39, result has 85.0 percent of original size [2021-07-13 20:41:52,302 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-07-13 20:41:52,303 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:641, output treesize:342 [2021-07-13 20:41:52,457 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2021-07-13 20:41:52,614 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 20:41:52,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774476226] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:52,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:52,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:41:52,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255207740] [2021-07-13 20:41:52,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:41:52,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:52,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:41:52,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:41:52,615 INFO L87 Difference]: Start difference. First operand 1795 states and 6073 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 20:41:52,789 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 30 [2021-07-13 20:41:53,034 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2021-07-13 20:41:53,474 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2021-07-13 20:41:53,654 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 64 [2021-07-13 20:41:53,881 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-07-13 20:41:54,009 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 58 [2021-07-13 20:41:54,270 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 53 [2021-07-13 20:41:54,431 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 69 [2021-07-13 20:41:54,786 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-07-13 20:41:55,051 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2021-07-13 20:41:55,282 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 42 [2021-07-13 20:41:55,444 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2021-07-13 20:41:56,041 WARN L205 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 72 [2021-07-13 20:41:56,317 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 54 [2021-07-13 20:41:56,867 WARN L205 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 71 [2021-07-13 20:41:57,447 WARN L205 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 85 [2021-07-13 20:41:57,970 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 95 [2021-07-13 20:41:58,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:58,371 INFO L93 Difference]: Finished difference Result 2613 states and 8461 transitions. [2021-07-13 20:41:58,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:41:58,371 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 20:41:58,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:58,375 INFO L225 Difference]: With dead ends: 2613 [2021-07-13 20:41:58,375 INFO L226 Difference]: Without dead ends: 2544 [2021-07-13 20:41:58,375 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 5990.4ms TimeCoverageRelationStatistics Valid=344, Invalid=1818, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:41:58,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2544 states. [2021-07-13 20:41:58,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2544 to 1779. [2021-07-13 20:41:58,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1779 states, 1778 states have (on average 3.3830146231721034) internal successors, (6015), 1778 states have internal predecessors, (6015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:58,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1779 states to 1779 states and 6015 transitions. [2021-07-13 20:41:58,400 INFO L78 Accepts]: Start accepts. Automaton has 1779 states and 6015 transitions. Word has length 26 [2021-07-13 20:41:58,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:58,400 INFO L482 AbstractCegarLoop]: Abstraction has 1779 states and 6015 transitions. [2021-07-13 20:41:58,400 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 20:41:58,400 INFO L276 IsEmpty]: Start isEmpty. Operand 1779 states and 6015 transitions. [2021-07-13 20:41:58,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:41:58,402 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:58,402 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 20:41:58,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1846,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:58,617 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:58,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:58,617 INFO L82 PathProgramCache]: Analyzing trace with hash -923228447, now seen corresponding path program 48 times [2021-07-13 20:41:58,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:58,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621311333] [2021-07-13 20:41:58,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:58,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:58,926 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 20:41:58,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:58,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621311333] [2021-07-13 20:41:58,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621311333] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:58,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833095995] [2021-07-13 20:41:58,926 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 20:41:58,952 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:41:58,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:58,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:41:58,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:59,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:59,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:59,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:59,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:59,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:59,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:59,473 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 62 treesize of output 32 [2021-07-13 20:41:59,474 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:59,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:59,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:59,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:59,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:59,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:59,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:59,481 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 50 treesize of output 26 [2021-07-13 20:41:59,482 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:59,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:59,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:59,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:59,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:59,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:59,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:59,489 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 18 [2021-07-13 20:41:59,490 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:59,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:59,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:59,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:59,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:59,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:59,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:59,498 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 48 treesize of output 26 [2021-07-13 20:41:59,498 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:59,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:59,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:59,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:59,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:59,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:59,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:59,506 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 73 treesize of output 37 [2021-07-13 20:41:59,507 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:59,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:59,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:59,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:59,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:59,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:59,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:59,516 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 51 treesize of output 24 [2021-07-13 20:41:59,517 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:59,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:59,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:59,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:59,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:59,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:59,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:59,525 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 59 treesize of output 31 [2021-07-13 20:41:59,526 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:59,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:59,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:59,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:59,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:59,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:59,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:59,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 24 [2021-07-13 20:41:59,535 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:59,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:59,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:59,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:59,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:59,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:59,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:59,544 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 61 treesize of output 31 [2021-07-13 20:41:59,545 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:59,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:59,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:59,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:59,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:59,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:59,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:59,554 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 58 treesize of output 30 [2021-07-13 20:41:59,555 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:59,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:59,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:59,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:59,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:59,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:59,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:59,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 33 [2021-07-13 20:41:59,565 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:59,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:59,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:59,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:59,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:59,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:59,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:59,574 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 46 treesize of output 24 [2021-07-13 20:41:59,575 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:59,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:59,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:59,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:59,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:59,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:59,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:59,584 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 54 treesize of output 28 [2021-07-13 20:41:59,585 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:59,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:59,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:59,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:59,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:59,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:59,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:59,594 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 43 treesize of output 23 [2021-07-13 20:41:59,595 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:59,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:59,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:59,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:59,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:59,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:59,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:59,604 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 53 treesize of output 27 [2021-07-13 20:41:59,605 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:59,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:59,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:59,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:59,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:59,610 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 44 treesize of output 24 [2021-07-13 20:41:59,610 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:59,690 INFO L628 ElimStorePlain]: treesize reduction 327, result has 11.6 percent of original size [2021-07-13 20:41:59,691 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 20:41:59,691 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:1045, output treesize:31 [2021-07-13 20:41:59,725 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 20:41:59,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833095995] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:59,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:59,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-13 20:41:59,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807459174] [2021-07-13 20:41:59,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:41:59,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:59,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:41:59,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:41:59,726 INFO L87 Difference]: Start difference. First operand 1779 states and 6015 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 20:42:01,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:01,017 INFO L93 Difference]: Finished difference Result 2238 states and 7371 transitions. [2021-07-13 20:42:01,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:42:01,017 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 20:42:01,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:01,021 INFO L225 Difference]: With dead ends: 2238 [2021-07-13 20:42:01,021 INFO L226 Difference]: Without dead ends: 2216 [2021-07-13 20:42:01,022 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1438.1ms TimeCoverageRelationStatistics Valid=247, Invalid=1013, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:42:01,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2216 states. [2021-07-13 20:42:01,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2216 to 1764. [2021-07-13 20:42:01,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1764 states, 1763 states have (on average 3.3851389676687464) internal successors, (5968), 1763 states have internal predecessors, (5968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:01,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1764 states to 1764 states and 5968 transitions. [2021-07-13 20:42:01,073 INFO L78 Accepts]: Start accepts. Automaton has 1764 states and 5968 transitions. Word has length 26 [2021-07-13 20:42:01,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:01,073 INFO L482 AbstractCegarLoop]: Abstraction has 1764 states and 5968 transitions. [2021-07-13 20:42:01,073 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 20:42:01,073 INFO L276 IsEmpty]: Start isEmpty. Operand 1764 states and 5968 transitions. [2021-07-13 20:42:01,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:42:01,076 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:01,076 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 20:42:01,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1874 [2021-07-13 20:42:01,292 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:01,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:01,292 INFO L82 PathProgramCache]: Analyzing trace with hash 2265419, now seen corresponding path program 49 times [2021-07-13 20:42:01,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:01,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679410463] [2021-07-13 20:42:01,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:01,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:01,695 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 20:42:01,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:01,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679410463] [2021-07-13 20:42:01,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679410463] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:01,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647934845] [2021-07-13 20:42:01,696 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:42:01,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:01,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:42:01,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:02,033 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_240], 5=[v_prenex_242, v_prenex_244]} [2021-07-13 20:42:02,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:02,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:02,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:02,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:02,041 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 39 treesize of output 18 [2021-07-13 20:42:02,042 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:02,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:02,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:02,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:02,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 18 [2021-07-13 20:42:02,047 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:02,153 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2021-07-13 20:42:02,153 INFO L628 ElimStorePlain]: treesize reduction 195, result has 44.9 percent of original size [2021-07-13 20:42:02,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:02,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:02,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:02,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-07-13 20:42:02,158 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:02,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:02,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:02,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:02,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:02,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:02,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 14 [2021-07-13 20:42:02,199 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:02,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:02,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:02,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:02,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:02,235 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 48 treesize of output 24 [2021-07-13 20:42:02,236 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:02,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:02,265 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 20:42:02,265 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:429, output treesize:55 [2021-07-13 20:42:02,314 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 20:42:02,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647934845] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:02,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:02,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-07-13 20:42:02,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163472949] [2021-07-13 20:42:02,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:42:02,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:02,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:42:02,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:42:02,315 INFO L87 Difference]: Start difference. First operand 1764 states and 5968 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 20:42:03,172 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 45 [2021-07-13 20:42:04,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:04,737 INFO L93 Difference]: Finished difference Result 2440 states and 8027 transitions. [2021-07-13 20:42:04,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:42:04,738 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 20:42:04,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:04,742 INFO L225 Difference]: With dead ends: 2440 [2021-07-13 20:42:04,742 INFO L226 Difference]: Without dead ends: 2425 [2021-07-13 20:42:04,742 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 2581.5ms TimeCoverageRelationStatistics Valid=496, Invalid=2054, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:42:04,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2425 states. [2021-07-13 20:42:04,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2425 to 1764. [2021-07-13 20:42:04,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1764 states, 1763 states have (on average 3.3851389676687464) internal successors, (5968), 1763 states have internal predecessors, (5968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:04,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1764 states to 1764 states and 5968 transitions. [2021-07-13 20:42:04,768 INFO L78 Accepts]: Start accepts. Automaton has 1764 states and 5968 transitions. Word has length 26 [2021-07-13 20:42:04,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:04,768 INFO L482 AbstractCegarLoop]: Abstraction has 1764 states and 5968 transitions. [2021-07-13 20:42:04,768 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 20:42:04,768 INFO L276 IsEmpty]: Start isEmpty. Operand 1764 states and 5968 transitions. [2021-07-13 20:42:04,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:42:04,770 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:04,770 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 20:42:04,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1980 [2021-07-13 20:42:04,986 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:04,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:04,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1175639121, now seen corresponding path program 50 times [2021-07-13 20:42:04,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:04,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624319764] [2021-07-13 20:42:04,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:04,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:05,465 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 20:42:05,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:05,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624319764] [2021-07-13 20:42:05,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624319764] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:05,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760837725] [2021-07-13 20:42:05,466 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 20:42:05,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:42:05,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:05,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:42:05,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:05,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:05,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:05,744 INFO L354 Elim1Store]: treesize reduction 16, result has 40.7 percent of original size [2021-07-13 20:42:05,745 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 53 treesize of output 37 [2021-07-13 20:42:05,746 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:05,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:05,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:05,771 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:05,772 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 62 treesize of output 58 [2021-07-13 20:42:05,780 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:05,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:05,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:05,812 INFO L354 Elim1Store]: treesize reduction 4, result has 85.2 percent of original size [2021-07-13 20:42:05,812 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 42 treesize of output 44 [2021-07-13 20:42:05,819 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:05,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:05,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:05,846 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-07-13 20:42:05,846 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 51 treesize of output 39 [2021-07-13 20:42:05,850 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:05,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:05,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:05,875 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-07-13 20:42:05,875 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 20:42:05,878 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:05,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:05,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:05,893 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:42:05,893 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 45 treesize of output 1 [2021-07-13 20:42:05,893 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:05,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:05,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:05,923 INFO L354 Elim1Store]: treesize reduction 4, result has 85.2 percent of original size [2021-07-13 20:42:05,924 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 46 treesize of output 46 [2021-07-13 20:42:05,926 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:05,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:05,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:05,941 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:42:05,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 20 [2021-07-13 20:42:05,942 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:05,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:05,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:05,958 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:42:05,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 20:42:05,958 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:05,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:05,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:05,998 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:42:05,998 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 18 [2021-07-13 20:42:05,999 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:06,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:06,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:06,012 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:42:06,013 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 38 treesize of output 20 [2021-07-13 20:42:06,014 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:06,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:06,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:06,028 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:42:06,028 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 54 treesize of output 1 [2021-07-13 20:42:06,029 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:06,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:06,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:06,043 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:42:06,043 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 47 treesize of output 1 [2021-07-13 20:42:06,044 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:06,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:06,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:06,059 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:42:06,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 1 [2021-07-13 20:42:06,059 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:06,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:06,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:06,073 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:42:06,074 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 20:42:06,074 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:06,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:06,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:06,090 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-07-13 20:42:06,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 37 [2021-07-13 20:42:06,091 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:06,156 INFO L628 ElimStorePlain]: treesize reduction 168, result has 24.7 percent of original size [2021-07-13 20:42:06,157 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:42:06,157 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:929, output treesize:55 [2021-07-13 20:42:06,251 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 20:42:06,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760837725] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:06,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:06,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2021-07-13 20:42:06,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409021163] [2021-07-13 20:42:06,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:42:06,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:06,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:42:06,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:42:06,252 INFO L87 Difference]: Start difference. First operand 1764 states and 5968 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 20:42:07,753 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2021-07-13 20:42:07,926 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2021-07-13 20:42:08,057 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2021-07-13 20:42:08,214 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2021-07-13 20:42:08,800 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-07-13 20:42:09,087 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 74 [2021-07-13 20:42:09,325 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 78 [2021-07-13 20:42:10,043 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-07-13 20:42:11,034 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2021-07-13 20:42:11,172 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2021-07-13 20:42:11,316 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2021-07-13 20:42:11,459 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2021-07-13 20:42:11,692 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2021-07-13 20:42:12,154 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2021-07-13 20:42:12,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:12,544 INFO L93 Difference]: Finished difference Result 3056 states and 9811 transitions. [2021-07-13 20:42:12,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-07-13 20:42:12,545 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 20:42:12,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:12,550 INFO L225 Difference]: With dead ends: 3056 [2021-07-13 20:42:12,550 INFO L226 Difference]: Without dead ends: 3009 [2021-07-13 20:42:12,550 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2257 ImplicationChecksByTransitivity, 5769.8ms TimeCoverageRelationStatistics Valid=1062, Invalid=5580, Unknown=0, NotChecked=0, Total=6642 [2021-07-13 20:42:12,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3009 states. [2021-07-13 20:42:12,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3009 to 1784. [2021-07-13 20:42:12,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1784 states, 1783 states have (on average 3.37633202467751) internal successors, (6020), 1783 states have internal predecessors, (6020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:12,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1784 states to 1784 states and 6020 transitions. [2021-07-13 20:42:12,583 INFO L78 Accepts]: Start accepts. Automaton has 1784 states and 6020 transitions. Word has length 26 [2021-07-13 20:42:12,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:12,583 INFO L482 AbstractCegarLoop]: Abstraction has 1784 states and 6020 transitions. [2021-07-13 20:42:12,583 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 20:42:12,583 INFO L276 IsEmpty]: Start isEmpty. Operand 1784 states and 6020 transitions. [2021-07-13 20:42:12,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:42:12,586 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:12,586 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 20:42:12,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1994 [2021-07-13 20:42:12,802 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:12,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:12,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1573091019, now seen corresponding path program 51 times [2021-07-13 20:42:12,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:12,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063434302] [2021-07-13 20:42:12,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:12,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:13,256 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 20:42:13,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:13,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063434302] [2021-07-13 20:42:13,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063434302] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:13,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230889310] [2021-07-13 20:42:13,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:42:13,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:42:13,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:13,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:42:13,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:13,693 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-07-13 20:42:14,081 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:14,081 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 30 treesize of output 66 [2021-07-13 20:42:14,121 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:42:14,187 INFO L354 Elim1Store]: treesize reduction 12, result has 75.5 percent of original size [2021-07-13 20:42:14,187 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 57 [2021-07-13 20:42:14,196 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:15,326 WARN L205 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 201 DAG size of output: 180 [2021-07-13 20:42:15,327 INFO L628 ElimStorePlain]: treesize reduction 96, result has 91.8 percent of original size [2021-07-13 20:42:15,390 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-07-13 20:42:15,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 55 [2021-07-13 20:42:15,398 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:15,448 INFO L354 Elim1Store]: treesize reduction 24, result has 51.0 percent of original size [2021-07-13 20:42:15,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 44 [2021-07-13 20:42:15,453 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:16,468 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 181 DAG size of output: 174 [2021-07-13 20:42:16,469 INFO L628 ElimStorePlain]: treesize reduction 21, result has 98.0 percent of original size [2021-07-13 20:42:16,534 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-07-13 20:42:16,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 68 [2021-07-13 20:42:16,559 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:16,604 INFO L354 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2021-07-13 20:42:16,604 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 39 treesize of output 41 [2021-07-13 20:42:16,605 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:17,770 WARN L205 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 200 DAG size of output: 187 [2021-07-13 20:42:17,771 INFO L628 ElimStorePlain]: treesize reduction 66, result has 94.1 percent of original size [2021-07-13 20:42:17,836 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-07-13 20:42:17,837 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 38 treesize of output 54 [2021-07-13 20:42:17,846 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:17,915 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-07-13 20:42:17,915 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 47 treesize of output 67 [2021-07-13 20:42:17,939 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:19,196 WARN L205 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 207 DAG size of output: 184 [2021-07-13 20:42:19,196 INFO L628 ElimStorePlain]: treesize reduction 163, result has 86.3 percent of original size [2021-07-13 20:42:19,265 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-07-13 20:42:19,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 68 [2021-07-13 20:42:19,278 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:19,339 INFO L354 Elim1Store]: treesize reduction 21, result has 57.1 percent of original size [2021-07-13 20:42:19,339 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 43 treesize of output 52 [2021-07-13 20:42:19,344 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:21,239 WARN L205 SmtUtils]: Spent 1.89 s on a formula simplification. DAG size of input: 202 DAG size of output: 192 [2021-07-13 20:42:21,240 INFO L628 ElimStorePlain]: treesize reduction 53, result has 95.1 percent of original size [2021-07-13 20:42:21,305 INFO L354 Elim1Store]: treesize reduction 12, result has 75.5 percent of original size [2021-07-13 20:42:21,305 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 34 treesize of output 56 [2021-07-13 20:42:21,316 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:21,392 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-07-13 20:42:21,392 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 43 treesize of output 65 [2021-07-13 20:42:21,433 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:23,180 WARN L205 SmtUtils]: Spent 1.75 s on a formula simplification. DAG size of input: 220 DAG size of output: 180 [2021-07-13 20:42:23,181 INFO L628 ElimStorePlain]: treesize reduction 304, result has 75.8 percent of original size [2021-07-13 20:42:23,249 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-07-13 20:42:23,249 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 47 treesize of output 67 [2021-07-13 20:42:23,287 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:23,328 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:23,328 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 56 treesize of output 80 [2021-07-13 20:42:23,461 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:24,831 WARN L205 SmtUtils]: Spent 1.37 s on a formula simplification. DAG size of input: 279 DAG size of output: 208 [2021-07-13 20:42:24,831 INFO L628 ElimStorePlain]: treesize reduction 459, result has 68.3 percent of original size [2021-07-13 20:42:24,899 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-07-13 20:42:24,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2021-07-13 20:42:24,903 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:24,982 INFO L354 Elim1Store]: treesize reduction 20, result has 59.2 percent of original size [2021-07-13 20:42:24,983 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 49 [2021-07-13 20:42:24,988 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:26,180 WARN L205 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 199 DAG size of output: 198 [2021-07-13 20:42:26,180 INFO L628 ElimStorePlain]: treesize reduction 8, result has 99.2 percent of original size [2021-07-13 20:42:26,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 8 dim-1 vars, End of recursive call: and 14 xjuncts. [2021-07-13 20:42:26,548 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 17 variables, input treesize:1105, output treesize:5253 [2021-07-13 20:42:27,999 WARN L205 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 258 DAG size of output: 107 [2021-07-13 20:42:28,429 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 78 [2021-07-13 20:42:28,704 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 20:42:28,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230889310] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:28,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:28,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-13 20:42:28,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258757572] [2021-07-13 20:42:28,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:42:28,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:28,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:42:28,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:42:28,705 INFO L87 Difference]: Start difference. First operand 1784 states and 6020 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 20:42:29,147 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 36 [2021-07-13 20:42:30,370 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 62 [2021-07-13 20:42:31,202 WARN L205 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 106 [2021-07-13 20:42:31,851 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 72 [2021-07-13 20:42:32,116 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 41 [2021-07-13 20:42:32,701 WARN L205 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 63 [2021-07-13 20:42:32,902 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 37 [2021-07-13 20:42:33,337 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 71 [2021-07-13 20:42:33,859 WARN L205 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 70 [2021-07-13 20:42:34,296 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2021-07-13 20:42:35,151 WARN L205 SmtUtils]: Spent 794.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 109 [2021-07-13 20:42:35,474 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 85 [2021-07-13 20:42:36,056 WARN L205 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 84 [2021-07-13 20:42:36,313 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 40 [2021-07-13 20:42:36,574 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 48 [2021-07-13 20:42:37,160 WARN L205 SmtUtils]: Spent 526.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 75 [2021-07-13 20:42:37,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:37,230 INFO L93 Difference]: Finished difference Result 2817 states and 9172 transitions. [2021-07-13 20:42:37,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:42:37,230 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 20:42:37,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:37,236 INFO L225 Difference]: With dead ends: 2817 [2021-07-13 20:42:37,236 INFO L226 Difference]: Without dead ends: 2787 [2021-07-13 20:42:37,236 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 849 ImplicationChecksByTransitivity, 9836.8ms TimeCoverageRelationStatistics Valid=559, Invalid=2981, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:42:37,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2787 states. [2021-07-13 20:42:37,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2787 to 1785. [2021-07-13 20:42:37,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1785 states, 1784 states have (on average 3.3778026905829597) internal successors, (6026), 1784 states have internal predecessors, (6026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:37,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1785 states to 1785 states and 6026 transitions. [2021-07-13 20:42:37,281 INFO L78 Accepts]: Start accepts. Automaton has 1785 states and 6026 transitions. Word has length 26 [2021-07-13 20:42:37,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:37,281 INFO L482 AbstractCegarLoop]: Abstraction has 1785 states and 6026 transitions. [2021-07-13 20:42:37,281 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 20:42:37,282 INFO L276 IsEmpty]: Start isEmpty. Operand 1785 states and 6026 transitions. [2021-07-13 20:42:37,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:42:37,284 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:37,284 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 20:42:37,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2027 [2021-07-13 20:42:37,500 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:37,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:37,501 INFO L82 PathProgramCache]: Analyzing trace with hash 238696335, now seen corresponding path program 52 times [2021-07-13 20:42:37,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:37,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972245202] [2021-07-13 20:42:37,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:37,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:37,816 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-07-13 20:42:37,979 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 42 [2021-07-13 20:42:38,151 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 20:42:38,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:38,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972245202] [2021-07-13 20:42:38,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972245202] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:38,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573361051] [2021-07-13 20:42:38,151 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 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 20:42:38,178 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:42:38,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:38,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:42:38,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:38,555 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-07-13 20:42:38,768 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_271, v_prenex_269], 6=[A, v_prenex_273]} [2021-07-13 20:42:38,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:38,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:38,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:38,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 21 [2021-07-13 20:42:38,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:38,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:38,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:38,782 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 21 [2021-07-13 20:42:38,782 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:38,912 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2021-07-13 20:42:38,912 INFO L628 ElimStorePlain]: treesize reduction 220, result has 44.2 percent of original size [2021-07-13 20:42:38,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:38,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-07-13 20:42:38,917 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:38,962 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:38,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:38,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:38,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:38,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:38,967 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 32 treesize of output 18 [2021-07-13 20:42:38,968 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:39,008 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:39,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:39,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:39,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:39,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:39,013 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 56 treesize of output 30 [2021-07-13 20:42:39,014 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:39,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:39,049 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 20:42:39,049 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:485, output treesize:67 [2021-07-13 20:42:39,127 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 20:42:39,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573361051] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:39,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:39,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-07-13 20:42:39,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234687057] [2021-07-13 20:42:39,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:42:39,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:39,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:42:39,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:42:39,129 INFO L87 Difference]: Start difference. First operand 1785 states and 6026 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 20:42:40,310 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2021-07-13 20:42:40,469 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 63 [2021-07-13 20:42:40,800 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 61 [2021-07-13 20:42:41,044 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 61 [2021-07-13 20:42:41,258 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 69 [2021-07-13 20:42:41,792 WARN L205 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 74 [2021-07-13 20:42:42,012 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 71 [2021-07-13 20:42:42,298 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-07-13 20:42:42,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:42,326 INFO L93 Difference]: Finished difference Result 2300 states and 7575 transitions. [2021-07-13 20:42:42,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:42:42,326 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 20:42:42,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:42,330 INFO L225 Difference]: With dead ends: 2300 [2021-07-13 20:42:42,330 INFO L226 Difference]: Without dead ends: 2285 [2021-07-13 20:42:42,331 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 3574.0ms TimeCoverageRelationStatistics Valid=333, Invalid=1473, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:42:42,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-07-13 20:42:42,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 1783. [2021-07-13 20:42:42,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1783 states, 1782 states have (on average 3.377665544332211) internal successors, (6019), 1782 states have internal predecessors, (6019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:42,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1783 states to 1783 states and 6019 transitions. [2021-07-13 20:42:42,354 INFO L78 Accepts]: Start accepts. Automaton has 1783 states and 6019 transitions. Word has length 26 [2021-07-13 20:42:42,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:42,354 INFO L482 AbstractCegarLoop]: Abstraction has 1783 states and 6019 transitions. [2021-07-13 20:42:42,354 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 20:42:42,355 INFO L276 IsEmpty]: Start isEmpty. Operand 1783 states and 6019 transitions. [2021-07-13 20:42:42,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:42:42,357 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:42,357 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 20:42:42,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2295 [2021-07-13 20:42:42,573 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:42,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:42,573 INFO L82 PathProgramCache]: Analyzing trace with hash -169937649, now seen corresponding path program 53 times [2021-07-13 20:42:42,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:42,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397768648] [2021-07-13 20:42:42,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:42,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:42,910 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 20:42:42,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:42,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397768648] [2021-07-13 20:42:42,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397768648] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:42,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260175384] [2021-07-13 20:42:42,910 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 20:42:42,937 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:42:42,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:42,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 20:42:42,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:43,364 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-07-13 20:42:43,656 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2021-07-13 20:42:43,976 INFO L446 ElimStorePlain]: Different costs {5=[A, v_prenex_282, v_prenex_284, v_prenex_285, v_prenex_286, v_prenex_287, v_prenex_288], 6=[v_prenex_283]} [2021-07-13 20:42:43,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:43,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:44,024 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-07-13 20:42:44,025 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 31 [2021-07-13 20:42:44,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:44,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:44,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:44,076 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:44,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 46 [2021-07-13 20:42:44,083 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-07-13 20:42:45,148 WARN L205 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 201 DAG size of output: 192 [2021-07-13 20:42:45,149 INFO L628 ElimStorePlain]: treesize reduction 32, result has 97.5 percent of original size [2021-07-13 20:42:45,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:45,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:45,186 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-13 20:42:45,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 36 [2021-07-13 20:42:45,190 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:45,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:45,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:45,221 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-13 20:42:45,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 41 [2021-07-13 20:42:45,225 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:45,993 WARN L205 SmtUtils]: Spent 768.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 178 [2021-07-13 20:42:45,994 INFO L628 ElimStorePlain]: treesize reduction 50, result has 95.8 percent of original size [2021-07-13 20:42:46,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,033 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-07-13 20:42:46,033 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 44 treesize of output 46 [2021-07-13 20:42:46,038 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:46,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,065 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-07-13 20:42:46,065 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 53 treesize of output 41 [2021-07-13 20:42:46,068 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:46,758 WARN L205 SmtUtils]: Spent 689.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 166 [2021-07-13 20:42:46,759 INFO L628 ElimStorePlain]: treesize reduction 4, result has 99.6 percent of original size [2021-07-13 20:42:46,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,815 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-07-13 20:42:46,815 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 51 treesize of output 37 [2021-07-13 20:42:46,817 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:46,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,843 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-13 20:42:46,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 44 [2021-07-13 20:42:46,845 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:47,441 WARN L205 SmtUtils]: Spent 595.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 154 [2021-07-13 20:42:47,441 INFO L628 ElimStorePlain]: treesize reduction 37, result has 96.2 percent of original size [2021-07-13 20:42:47,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:47,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:47,473 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-07-13 20:42:47,473 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 20:42:47,475 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:47,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:47,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:47,505 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-07-13 20:42:47,505 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 44 treesize of output 48 [2021-07-13 20:42:47,507 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:47,784 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2021-07-13 20:42:47,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:47,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:47,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:47,815 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-13 20:42:47,815 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 52 treesize of output 44 [2021-07-13 20:42:47,817 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:47,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:47,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:47,831 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:42:47,832 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 20:42:47,832 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:48,293 WARN L205 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 131 [2021-07-13 20:42:48,294 INFO L628 ElimStorePlain]: treesize reduction 10, result has 98.7 percent of original size [2021-07-13 20:42:48,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:48,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:48,321 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-07-13 20:42:48,321 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 40 treesize of output 32 [2021-07-13 20:42:48,322 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:48,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:48,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:48,345 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-13 20:42:48,346 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 39 [2021-07-13 20:42:48,348 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:48,803 WARN L205 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 118 [2021-07-13 20:42:48,804 INFO L628 ElimStorePlain]: treesize reduction 37, result has 94.9 percent of original size [2021-07-13 20:42:48,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:48,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:48,845 INFO L354 Elim1Store]: treesize reduction 8, result has 78.4 percent of original size [2021-07-13 20:42:48,845 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 6 new quantified variables, introduced 4 case distinctions, treesize of input 176 treesize of output 104 [2021-07-13 20:42:48,855 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:48,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:48,867 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-07-13 20:42:48,868 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 130 treesize of output 1 [2021-07-13 20:42:48,868 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:49,224 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 97 [2021-07-13 20:42:49,225 INFO L628 ElimStorePlain]: treesize reduction 68, result has 85.0 percent of original size [2021-07-13 20:42:49,233 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-07-13 20:42:49,234 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:1282, output treesize:291 [2021-07-13 20:42:49,369 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 31 [2021-07-13 20:42:49,420 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 20:42:49,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260175384] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:49,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:49,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-07-13 20:42:49,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338895356] [2021-07-13 20:42:49,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:42:49,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:49,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:42:49,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:42:49,421 INFO L87 Difference]: Start difference. First operand 1783 states and 6019 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 20:42:51,190 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-07-13 20:42:57,014 WARN L205 SmtUtils]: Spent 5.66 s on a formula simplification. DAG size of input: 209 DAG size of output: 150 [2021-07-13 20:42:57,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:57,302 INFO L93 Difference]: Finished difference Result 2524 states and 8353 transitions. [2021-07-13 20:42:57,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:42:57,302 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 20:42:57,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:57,307 INFO L225 Difference]: With dead ends: 2524 [2021-07-13 20:42:57,307 INFO L226 Difference]: Without dead ends: 2509 [2021-07-13 20:42:57,307 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 8202.9ms TimeCoverageRelationStatistics Valid=307, Invalid=1585, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:42:57,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2509 states. [2021-07-13 20:42:57,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2509 to 1785. [2021-07-13 20:42:57,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1785 states, 1784 states have (on average 3.3778026905829597) internal successors, (6026), 1784 states have internal predecessors, (6026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:57,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1785 states to 1785 states and 6026 transitions. [2021-07-13 20:42:57,333 INFO L78 Accepts]: Start accepts. Automaton has 1785 states and 6026 transitions. Word has length 26 [2021-07-13 20:42:57,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:57,334 INFO L482 AbstractCegarLoop]: Abstraction has 1785 states and 6026 transitions. [2021-07-13 20:42:57,334 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 20:42:57,334 INFO L276 IsEmpty]: Start isEmpty. Operand 1785 states and 6026 transitions. [2021-07-13 20:42:57,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:42:57,336 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:57,336 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 20:42:57,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2309,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:57,549 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:57,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:57,549 INFO L82 PathProgramCache]: Analyzing trace with hash 597949447, now seen corresponding path program 54 times [2021-07-13 20:42:57,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:57,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018418437] [2021-07-13 20:42:57,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:57,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:58,019 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 20:42:58,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:58,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018418437] [2021-07-13 20:42:58,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018418437] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:58,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922421896] [2021-07-13 20:42:58,019 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 20:42:58,069 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:42:58,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:58,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:42:58,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:58,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:58,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:58,312 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-07-13 20:42:58,312 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 20:42:58,315 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:58,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:58,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:58,338 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:58,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 58 [2021-07-13 20:42:58,345 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:58,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:58,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:58,358 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:42:58,358 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 18 [2021-07-13 20:42:58,360 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:58,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:58,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:58,373 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:42:58,374 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 20:42:58,374 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:58,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:58,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:58,389 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:42:58,389 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 51 treesize of output 1 [2021-07-13 20:42:58,389 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:58,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:58,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:58,404 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:42:58,404 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 53 treesize of output 1 [2021-07-13 20:42:58,404 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:58,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:58,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:58,419 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:42:58,420 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 54 treesize of output 1 [2021-07-13 20:42:58,420 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:58,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:58,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:58,434 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:42:58,434 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 20:42:58,434 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:58,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:58,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:58,448 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:42:58,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 20:42:58,449 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:58,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:58,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:58,462 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:42:58,462 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 42 treesize of output 22 [2021-07-13 20:42:58,463 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:58,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:58,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:58,476 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:42:58,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 20 [2021-07-13 20:42:58,478 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:58,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:58,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:58,492 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:42:58,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 1 [2021-07-13 20:42:58,492 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:58,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:58,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:58,505 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:42:58,505 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 49 treesize of output 1 [2021-07-13 20:42:58,506 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:58,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:58,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:58,518 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:42:58,518 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 38 treesize of output 20 [2021-07-13 20:42:58,519 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:58,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:58,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:58,532 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:42:58,532 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 47 treesize of output 1 [2021-07-13 20:42:58,532 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:58,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:58,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:58,540 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:42:58,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 1 [2021-07-13 20:42:58,540 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:58,566 INFO L628 ElimStorePlain]: treesize reduction 64, result has 29.7 percent of original size [2021-07-13 20:42:58,567 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:42:58,567 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:929, output treesize:27 [2021-07-13 20:42:58,622 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 20:42:58,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922421896] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:58,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:58,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2021-07-13 20:42:58,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489948955] [2021-07-13 20:42:58,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:42:58,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:58,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:42:58,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:42:58,623 INFO L87 Difference]: Start difference. First operand 1785 states and 6026 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 20:42:59,845 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 42 [2021-07-13 20:43:00,245 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 43 [2021-07-13 20:43:00,391 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 46 [2021-07-13 20:43:00,807 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2021-07-13 20:43:01,115 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2021-07-13 20:43:01,289 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 55 [2021-07-13 20:43:01,501 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 80 [2021-07-13 20:43:01,778 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 76 [2021-07-13 20:43:02,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:02,285 INFO L93 Difference]: Finished difference Result 2886 states and 9372 transitions. [2021-07-13 20:43:02,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:43:02,285 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 20:43:02,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:02,290 INFO L225 Difference]: With dead ends: 2886 [2021-07-13 20:43:02,290 INFO L226 Difference]: Without dead ends: 2841 [2021-07-13 20:43:02,290 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 755 ImplicationChecksByTransitivity, 3598.4ms TimeCoverageRelationStatistics Valid=603, Invalid=2589, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:43:02,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2841 states. [2021-07-13 20:43:02,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2841 to 1790. [2021-07-13 20:43:02,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1790 states, 1789 states have (on average 3.377864728898826) internal successors, (6043), 1789 states have internal predecessors, (6043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:02,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1790 states to 1790 states and 6043 transitions. [2021-07-13 20:43:02,319 INFO L78 Accepts]: Start accepts. Automaton has 1790 states and 6043 transitions. Word has length 26 [2021-07-13 20:43:02,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:02,319 INFO L482 AbstractCegarLoop]: Abstraction has 1790 states and 6043 transitions. [2021-07-13 20:43:02,319 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 20:43:02,319 INFO L276 IsEmpty]: Start isEmpty. Operand 1790 states and 6043 transitions. [2021-07-13 20:43:02,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:43:02,321 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:02,321 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 20:43:02,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2375 [2021-07-13 20:43:02,537 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:02,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:02,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1153824785, now seen corresponding path program 33 times [2021-07-13 20:43:02,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:02,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333311435] [2021-07-13 20:43:02,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:02,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:02,865 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 20:43:02,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:02,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333311435] [2021-07-13 20:43:02,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333311435] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:02,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664902489] [2021-07-13 20:43:02,866 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 20:43:02,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:43:02,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:02,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:43:02,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:03,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:03,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:03,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:03,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 35 treesize of output 21 [2021-07-13 20:43:03,498 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:03,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:03,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:03,504 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 30 treesize of output 18 [2021-07-13 20:43:03,504 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:03,701 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 66 [2021-07-13 20:43:03,701 INFO L628 ElimStorePlain]: treesize reduction 136, result has 57.9 percent of original size [2021-07-13 20:43:03,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:03,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:03,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:03,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 20 [2021-07-13 20:43:03,709 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:03,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:03,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:03,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 35 treesize of output 21 [2021-07-13 20:43:03,714 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:03,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:03,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:03,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-07-13 20:43:03,783 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:03,845 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:03,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:03,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:03,850 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-07-13 20:43:03,851 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:03,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:03,910 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 20:43:03,910 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 12 variables, input treesize:361, output treesize:72 [2021-07-13 20:43:03,978 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 20:43:03,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664902489] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:03,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:03,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 20:43:03,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450754245] [2021-07-13 20:43:03,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:43:03,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:03,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:43:03,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:43:03,979 INFO L87 Difference]: Start difference. First operand 1790 states and 6043 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 20:43:04,898 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 81 [2021-07-13 20:43:05,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:05,161 INFO L93 Difference]: Finished difference Result 2197 states and 7293 transitions. [2021-07-13 20:43:05,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:43:05,162 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 20:43:05,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:05,166 INFO L225 Difference]: With dead ends: 2197 [2021-07-13 20:43:05,166 INFO L226 Difference]: Without dead ends: 2182 [2021-07-13 20:43:05,166 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1467.9ms TimeCoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:43:05,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2182 states. [2021-07-13 20:43:05,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2182 to 1782. [2021-07-13 20:43:05,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1782 states, 1781 states have (on average 3.381246490735542) internal successors, (6022), 1781 states have internal predecessors, (6022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:05,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1782 states to 1782 states and 6022 transitions. [2021-07-13 20:43:05,189 INFO L78 Accepts]: Start accepts. Automaton has 1782 states and 6022 transitions. Word has length 26 [2021-07-13 20:43:05,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:05,189 INFO L482 AbstractCegarLoop]: Abstraction has 1782 states and 6022 transitions. [2021-07-13 20:43:05,189 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 20:43:05,189 INFO L276 IsEmpty]: Start isEmpty. Operand 1782 states and 6022 transitions. [2021-07-13 20:43:05,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:43:05,191 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:05,191 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 20:43:05,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2401 [2021-07-13 20:43:05,392 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:05,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:05,392 INFO L82 PathProgramCache]: Analyzing trace with hash -824665213, now seen corresponding path program 34 times [2021-07-13 20:43:05,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:05,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251079387] [2021-07-13 20:43:05,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:05,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:05,666 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 40 [2021-07-13 20:43:05,843 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 20:43:05,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:05,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251079387] [2021-07-13 20:43:05,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251079387] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:05,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007680813] [2021-07-13 20:43:05,843 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 20:43:05,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:43:05,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:05,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:43:05,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:06,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:06,150 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:43:06,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 47 [2021-07-13 20:43:06,150 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:06,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:06,159 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:43:06,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 104 treesize of output 55 [2021-07-13 20:43:06,160 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:06,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:06,172 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-07-13 20:43:06,172 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 5 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 42 [2021-07-13 20:43:06,173 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:06,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:06,182 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:43:06,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 47 [2021-07-13 20:43:06,183 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:06,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:06,192 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:43:06,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 81 treesize of output 51 [2021-07-13 20:43:06,192 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:06,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:06,202 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:43:06,202 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 5 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 1 [2021-07-13 20:43:06,203 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:06,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:06,212 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:43:06,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 93 treesize of output 54 [2021-07-13 20:43:06,213 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:06,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:06,223 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:43:06,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 93 treesize of output 54 [2021-07-13 20:43:06,224 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:06,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:06,234 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:43:06,234 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 5 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 1 [2021-07-13 20:43:06,234 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:06,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:06,243 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:43:06,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 81 treesize of output 51 [2021-07-13 20:43:06,243 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:06,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:06,255 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-07-13 20:43:06,256 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 5 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 52 [2021-07-13 20:43:06,257 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:06,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:06,268 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-07-13 20:43:06,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 106 treesize of output 60 [2021-07-13 20:43:06,269 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:06,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:06,282 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-07-13 20:43:06,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 45 [2021-07-13 20:43:06,283 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:06,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:06,292 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:43:06,292 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 5 new quantified variables, introduced 2 case distinctions, treesize of input 104 treesize of output 55 [2021-07-13 20:43:06,292 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:06,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:06,302 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:43:06,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 1 [2021-07-13 20:43:06,303 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:06,310 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-07-13 20:43:06,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 106 treesize of output 60 [2021-07-13 20:43:06,311 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:06,369 INFO L628 ElimStorePlain]: treesize reduction 47, result has 63.6 percent of original size [2021-07-13 20:43:06,371 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:43:06,371 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:1445, output treesize:46 [2021-07-13 20:43:06,408 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 20:43:06,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007680813] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:06,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:06,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 20:43:06,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64661921] [2021-07-13 20:43:06,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:43:06,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:06,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:43:06,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:43:06,409 INFO L87 Difference]: Start difference. First operand 1782 states and 6022 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) 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 20:43:07,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:07,097 INFO L93 Difference]: Finished difference Result 1968 states and 6539 transitions. [2021-07-13 20:43:07,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:43:07,098 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) 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 20:43:07,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:07,101 INFO L225 Difference]: With dead ends: 1968 [2021-07-13 20:43:07,101 INFO L226 Difference]: Without dead ends: 1953 [2021-07-13 20:43:07,101 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 1102.7ms TimeCoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:43:07,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1953 states. [2021-07-13 20:43:07,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1953 to 1791. [2021-07-13 20:43:07,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1791 states, 1790 states have (on average 3.3843575418994414) internal successors, (6058), 1790 states have internal predecessors, (6058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:07,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1791 states to 1791 states and 6058 transitions. [2021-07-13 20:43:07,121 INFO L78 Accepts]: Start accepts. Automaton has 1791 states and 6058 transitions. Word has length 26 [2021-07-13 20:43:07,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:07,121 INFO L482 AbstractCegarLoop]: Abstraction has 1791 states and 6058 transitions. [2021-07-13 20:43:07,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) 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 20:43:07,121 INFO L276 IsEmpty]: Start isEmpty. Operand 1791 states and 6058 transitions. [2021-07-13 20:43:07,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:43:07,124 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:07,124 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 20:43:07,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2421,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:07,339 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:07,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:07,339 INFO L82 PathProgramCache]: Analyzing trace with hash -992474305, now seen corresponding path program 35 times [2021-07-13 20:43:07,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:07,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929563800] [2021-07-13 20:43:07,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:07,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:07,528 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 45 [2021-07-13 20:43:07,836 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 20:43:07,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:07,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929563800] [2021-07-13 20:43:07,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929563800] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:07,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511720872] [2021-07-13 20:43:07,836 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 20:43:07,862 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:43:07,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:07,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:43:07,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:08,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:08,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:08,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:08,162 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-07-13 20:43:08,163 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:08,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:08,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:08,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:08,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 18 [2021-07-13 20:43:08,168 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:08,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:08,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:08,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:08,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 44 treesize of output 26 [2021-07-13 20:43:08,174 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:08,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:08,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:08,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:08,178 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 26 treesize of output 16 [2021-07-13 20:43:08,179 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:08,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:08,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:08,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:08,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 22 [2021-07-13 20:43:08,184 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:08,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:08,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:08,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:08,189 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-07-13 20:43:08,190 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:08,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:08,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:08,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:08,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 35 treesize of output 21 [2021-07-13 20:43:08,195 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:08,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:08,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:08,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:08,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 22 [2021-07-13 20:43:08,200 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:08,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:08,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:08,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:08,205 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 31 treesize of output 16 [2021-07-13 20:43:08,206 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:08,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:08,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:08,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:08,211 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 31 treesize of output 16 [2021-07-13 20:43:08,212 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:08,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:08,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:08,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:08,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 10 [2021-07-13 20:43:08,217 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:08,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:08,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:08,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:08,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-07-13 20:43:08,222 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:08,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:08,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:08,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:08,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 22 [2021-07-13 20:43:08,228 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:08,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:08,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:08,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:08,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 39 treesize of output 23 [2021-07-13 20:43:08,234 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:08,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:08,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:08,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:08,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 39 treesize of output 23 [2021-07-13 20:43:08,239 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:08,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:08,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:08,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2021-07-13 20:43:08,244 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:08,309 INFO L628 ElimStorePlain]: treesize reduction 71, result has 48.2 percent of original size [2021-07-13 20:43:08,310 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:43:08,310 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:48 [2021-07-13 20:43:08,358 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 20:43:08,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511720872] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:08,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:08,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:43:08,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55056771] [2021-07-13 20:43:08,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:43:08,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:08,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:43:08,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:43:08,360 INFO L87 Difference]: Start difference. First operand 1791 states and 6058 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 20:43:08,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:08,783 INFO L93 Difference]: Finished difference Result 2115 states and 7050 transitions. [2021-07-13 20:43:08,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:43:08,784 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 20:43:08,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:08,787 INFO L225 Difference]: With dead ends: 2115 [2021-07-13 20:43:08,787 INFO L226 Difference]: Without dead ends: 2100 [2021-07-13 20:43:08,787 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 838.9ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:43:08,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2100 states. [2021-07-13 20:43:08,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2100 to 1785. [2021-07-13 20:43:08,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1785 states, 1784 states have (on average 3.383968609865471) internal successors, (6037), 1784 states have internal predecessors, (6037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:08,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1785 states to 1785 states and 6037 transitions. [2021-07-13 20:43:08,810 INFO L78 Accepts]: Start accepts. Automaton has 1785 states and 6037 transitions. Word has length 26 [2021-07-13 20:43:08,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:08,810 INFO L482 AbstractCegarLoop]: Abstraction has 1785 states and 6037 transitions. [2021-07-13 20:43:08,810 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 20:43:08,810 INFO L276 IsEmpty]: Start isEmpty. Operand 1785 states and 6037 transitions. [2021-07-13 20:43:08,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:43:08,812 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:08,812 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 20:43:09,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2426,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:09,027 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:09,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:09,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1234976963, now seen corresponding path program 36 times [2021-07-13 20:43:09,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:09,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704311547] [2021-07-13 20:43:09,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:09,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:09,411 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 20:43:09,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:09,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704311547] [2021-07-13 20:43:09,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704311547] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:09,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482732261] [2021-07-13 20:43:09,412 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 20:43:09,436 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:43:09,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:09,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:43:09,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:09,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:09,711 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:09,711 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 27 [2021-07-13 20:43:09,712 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:09,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:09,721 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:43:09,721 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 1 [2021-07-13 20:43:09,722 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:09,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:09,729 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:43:09,729 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 20:43:09,730 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:09,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:09,738 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:43:09,738 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 35 treesize of output 21 [2021-07-13 20:43:09,740 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:09,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:09,747 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:43:09,747 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 18 [2021-07-13 20:43:09,748 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:09,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:09,759 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:43:09,759 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 35 treesize of output 25 [2021-07-13 20:43:09,760 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:09,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:09,770 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:09,770 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 44 treesize of output 34 [2021-07-13 20:43:09,771 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:09,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:09,780 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:43:09,780 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 20:43:09,781 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:09,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:09,791 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:09,791 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 20:43:09,793 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:09,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:09,801 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:43:09,801 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 44 treesize of output 26 [2021-07-13 20:43:09,802 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:09,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:09,810 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:43:09,810 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 13 [2021-07-13 20:43:09,811 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:09,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:09,822 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:09,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-07-13 20:43:09,823 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:09,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:09,831 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:43:09,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 25 [2021-07-13 20:43:09,832 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:09,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:09,839 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:43:09,839 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 39 treesize of output 23 [2021-07-13 20:43:09,840 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:09,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:09,847 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:43:09,847 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 20:43:09,848 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:09,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:09,853 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:43:09,854 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 1 [2021-07-13 20:43:09,854 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:09,968 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-07-13 20:43:09,968 INFO L628 ElimStorePlain]: treesize reduction 92, result has 50.8 percent of original size [2021-07-13 20:43:09,971 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:43:09,971 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:88 [2021-07-13 20:43:10,116 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 20:43:10,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482732261] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:10,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:10,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 20:43:10,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60569339] [2021-07-13 20:43:10,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:43:10,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:10,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:43:10,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:43:10,117 INFO L87 Difference]: Start difference. First operand 1785 states and 6037 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 20:43:10,361 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2021-07-13 20:43:10,677 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 71 [2021-07-13 20:43:11,159 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 80 [2021-07-13 20:43:11,317 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 73 [2021-07-13 20:43:11,614 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 73 [2021-07-13 20:43:11,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:11,757 INFO L93 Difference]: Finished difference Result 2622 states and 8655 transitions. [2021-07-13 20:43:11,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:43:11,757 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 20:43:11,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:11,762 INFO L225 Difference]: With dead ends: 2622 [2021-07-13 20:43:11,762 INFO L226 Difference]: Without dead ends: 2607 [2021-07-13 20:43:11,763 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1822.3ms TimeCoverageRelationStatistics Valid=210, Invalid=782, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:43:11,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2607 states. [2021-07-13 20:43:11,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2607 to 1782. [2021-07-13 20:43:11,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1782 states, 1781 states have (on average 3.381246490735542) internal successors, (6022), 1781 states have internal predecessors, (6022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:11,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1782 states to 1782 states and 6022 transitions. [2021-07-13 20:43:11,796 INFO L78 Accepts]: Start accepts. Automaton has 1782 states and 6022 transitions. Word has length 26 [2021-07-13 20:43:11,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:11,796 INFO L482 AbstractCegarLoop]: Abstraction has 1782 states and 6022 transitions. [2021-07-13 20:43:11,796 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 20:43:11,796 INFO L276 IsEmpty]: Start isEmpty. Operand 1782 states and 6022 transitions. [2021-07-13 20:43:11,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:43:11,799 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:11,799 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 20:43:12,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2456 [2021-07-13 20:43:12,013 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:12,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:12,013 INFO L82 PathProgramCache]: Analyzing trace with hash 649627467, now seen corresponding path program 37 times [2021-07-13 20:43:12,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:12,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967423567] [2021-07-13 20:43:12,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:12,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:12,376 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 20:43:12,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:12,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967423567] [2021-07-13 20:43:12,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967423567] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:12,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27460503] [2021-07-13 20:43:12,376 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 20:43:12,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:12,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:43:12,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:12,707 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-07-13 20:43:12,779 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-07-13 20:43:12,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 56 [2021-07-13 20:43:12,781 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:12,936 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2021-07-13 20:43:12,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:12,955 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-07-13 20:43:12,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 49 [2021-07-13 20:43:12,956 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:13,107 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2021-07-13 20:43:13,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:13,125 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-07-13 20:43:13,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 54 [2021-07-13 20:43:13,127 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:13,263 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2021-07-13 20:43:13,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:13,281 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-07-13 20:43:13,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 95 treesize of output 60 [2021-07-13 20:43:13,283 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:13,417 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2021-07-13 20:43:13,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:13,436 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-07-13 20:43:13,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 55 [2021-07-13 20:43:13,439 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:13,571 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2021-07-13 20:43:13,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:13,588 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-07-13 20:43:13,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 50 [2021-07-13 20:43:13,591 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:13,711 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-07-13 20:43:13,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:13,724 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-07-13 20:43:13,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 49 [2021-07-13 20:43:13,726 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:13,840 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-07-13 20:43:13,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:13,854 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-07-13 20:43:13,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 100 treesize of output 63 [2021-07-13 20:43:13,856 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:13,995 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-07-13 20:43:13,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:14,003 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 20:43:14,003 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:665, output treesize:244 [2021-07-13 20:43:14,155 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-07-13 20:43:14,233 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 20:43:14,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27460503] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:14,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:14,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 20:43:14,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279590093] [2021-07-13 20:43:14,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:43:14,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:14,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:43:14,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:43:14,234 INFO L87 Difference]: Start difference. First operand 1782 states and 6022 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 20:43:15,192 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-07-13 20:43:15,552 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2021-07-13 20:43:15,992 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 74 [2021-07-13 20:43:16,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:16,190 INFO L93 Difference]: Finished difference Result 2302 states and 7609 transitions. [2021-07-13 20:43:16,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:43:16,191 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 20:43:16,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:16,215 INFO L225 Difference]: With dead ends: 2302 [2021-07-13 20:43:16,215 INFO L226 Difference]: Without dead ends: 2287 [2021-07-13 20:43:16,215 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 2298.6ms TimeCoverageRelationStatistics Valid=200, Invalid=730, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:43:16,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2287 states. [2021-07-13 20:43:16,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2287 to 1774. [2021-07-13 20:43:16,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1774 states, 1773 states have (on average 3.3756345177664975) internal successors, (5985), 1773 states have internal predecessors, (5985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:16,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1774 states to 1774 states and 5985 transitions. [2021-07-13 20:43:16,238 INFO L78 Accepts]: Start accepts. Automaton has 1774 states and 5985 transitions. Word has length 26 [2021-07-13 20:43:16,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:16,239 INFO L482 AbstractCegarLoop]: Abstraction has 1774 states and 5985 transitions. [2021-07-13 20:43:16,239 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 20:43:16,239 INFO L276 IsEmpty]: Start isEmpty. Operand 1774 states and 5985 transitions. [2021-07-13 20:43:16,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:43:16,241 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:16,241 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 20:43:16,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2491 [2021-07-13 20:43:16,457 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:16,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:16,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1956490383, now seen corresponding path program 38 times [2021-07-13 20:43:16,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:16,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240331084] [2021-07-13 20:43:16,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:16,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:16,792 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 20:43:16,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:16,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240331084] [2021-07-13 20:43:16,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240331084] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:16,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721653745] [2021-07-13 20:43:16,792 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 20:43:16,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:43:16,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:16,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:43:16,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:17,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:17,054 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:17,055 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 27 [2021-07-13 20:43:17,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:17,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:17,067 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:43:17,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 20 [2021-07-13 20:43:17,068 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:17,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:17,076 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:43:17,077 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 20:43:17,077 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:17,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:17,086 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:43:17,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2021-07-13 20:43:17,087 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:17,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:17,098 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:17,098 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 39 treesize of output 31 [2021-07-13 20:43:17,099 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:17,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:17,111 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-07-13 20:43:17,111 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 21 [2021-07-13 20:43:17,112 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:17,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:17,125 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:17,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-07-13 20:43:17,126 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:17,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:17,137 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:43:17,137 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 35 treesize of output 1 [2021-07-13 20:43:17,137 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:17,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:17,146 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:43:17,146 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 18 [2021-07-13 20:43:17,147 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:17,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:17,156 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:43:17,156 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 20:43:17,156 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:17,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:17,165 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:43:17,165 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 13 [2021-07-13 20:43:17,167 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:17,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:17,175 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:43:17,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2021-07-13 20:43:17,176 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:17,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:17,185 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:43:17,185 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 41 treesize of output 25 [2021-07-13 20:43:17,185 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:17,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:17,194 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:43:17,194 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 1 [2021-07-13 20:43:17,195 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:17,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:17,203 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:43:17,203 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 35 treesize of output 21 [2021-07-13 20:43:17,203 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:17,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:17,209 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:43:17,209 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 20:43:17,209 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:17,282 INFO L628 ElimStorePlain]: treesize reduction 72, result has 52.6 percent of original size [2021-07-13 20:43:17,284 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:43:17,284 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:713, output treesize:80 [2021-07-13 20:43:17,403 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 20:43:17,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721653745] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:17,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:17,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-13 20:43:17,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238158945] [2021-07-13 20:43:17,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:43:17,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:17,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:43:17,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:43:17,404 INFO L87 Difference]: Start difference. First operand 1774 states and 5985 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 20:43:18,067 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2021-07-13 20:43:18,241 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2021-07-13 20:43:18,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:18,499 INFO L93 Difference]: Finished difference Result 2052 states and 6733 transitions. [2021-07-13 20:43:18,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:43:18,499 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 20:43:18,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:18,502 INFO L225 Difference]: With dead ends: 2052 [2021-07-13 20:43:18,502 INFO L226 Difference]: Without dead ends: 2031 [2021-07-13 20:43:18,502 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 1254.9ms TimeCoverageRelationStatistics Valid=159, Invalid=711, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:43:18,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2031 states. [2021-07-13 20:43:18,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2031 to 1745. [2021-07-13 20:43:18,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1745 states, 1744 states have (on average 3.371559633027523) internal successors, (5880), 1744 states have internal predecessors, (5880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:18,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1745 states to 1745 states and 5880 transitions. [2021-07-13 20:43:18,536 INFO L78 Accepts]: Start accepts. Automaton has 1745 states and 5880 transitions. Word has length 26 [2021-07-13 20:43:18,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:18,536 INFO L482 AbstractCegarLoop]: Abstraction has 1745 states and 5880 transitions. [2021-07-13 20:43:18,536 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 20:43:18,536 INFO L276 IsEmpty]: Start isEmpty. Operand 1745 states and 5880 transitions. [2021-07-13 20:43:18,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:43:18,538 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:18,538 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 20:43:18,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2504,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:18,755 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:18,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:18,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1231193713, now seen corresponding path program 39 times [2021-07-13 20:43:18,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:18,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54079908] [2021-07-13 20:43:18,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:18,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:19,082 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 20:43:19,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:19,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54079908] [2021-07-13 20:43:19,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54079908] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:19,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316515326] [2021-07-13 20:43:19,083 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 20:43:19,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:43:19,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:19,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:43:19,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:19,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:19,518 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:19,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 44 treesize of output 42 [2021-07-13 20:43:19,520 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:19,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:19,532 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:43:19,532 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 1 [2021-07-13 20:43:19,532 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:19,686 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-07-13 20:43:19,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:19,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:19,709 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:43:19,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 24 [2021-07-13 20:43:19,710 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:19,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:19,726 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:19,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 20:43:19,730 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:19,873 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-07-13 20:43:19,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:19,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:19,897 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:43:19,897 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 31 [2021-07-13 20:43:19,899 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:19,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:19,915 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-07-13 20:43:19,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 23 [2021-07-13 20:43:19,917 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:20,054 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-07-13 20:43:20,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:20,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:20,073 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:20,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 39 treesize of output 39 [2021-07-13 20:43:20,075 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:20,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:20,091 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-07-13 20:43:20,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 25 [2021-07-13 20:43:20,092 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:20,345 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2021-07-13 20:43:20,346 INFO L628 ElimStorePlain]: treesize reduction 3, result has 98.9 percent of original size [2021-07-13 20:43:20,367 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-13 20:43:20,367 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:401, output treesize:330 [2021-07-13 20:43:20,534 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-07-13 20:43:20,613 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 20:43:20,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316515326] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:20,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:20,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-07-13 20:43:20,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617934315] [2021-07-13 20:43:20,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:43:20,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:20,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:43:20,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:43:20,614 INFO L87 Difference]: Start difference. First operand 1745 states and 5880 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 20:43:21,428 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2021-07-13 20:43:21,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:21,633 INFO L93 Difference]: Finished difference Result 1970 states and 6526 transitions. [2021-07-13 20:43:21,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:43:21,634 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 20:43:21,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:21,637 INFO L225 Difference]: With dead ends: 1970 [2021-07-13 20:43:21,637 INFO L226 Difference]: Without dead ends: 1945 [2021-07-13 20:43:21,638 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1403.5ms TimeCoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:43:21,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1945 states. [2021-07-13 20:43:21,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1945 to 1724. [2021-07-13 20:43:21,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1724 states, 1723 states have (on average 3.3743470690655832) internal successors, (5814), 1723 states have internal predecessors, (5814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:21,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1724 states to 1724 states and 5814 transitions. [2021-07-13 20:43:21,663 INFO L78 Accepts]: Start accepts. Automaton has 1724 states and 5814 transitions. Word has length 26 [2021-07-13 20:43:21,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:21,663 INFO L482 AbstractCegarLoop]: Abstraction has 1724 states and 5814 transitions. [2021-07-13 20:43:21,663 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 20:43:21,663 INFO L276 IsEmpty]: Start isEmpty. Operand 1724 states and 5814 transitions. [2021-07-13 20:43:21,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:43:21,666 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:21,666 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 20:43:21,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2515 [2021-07-13 20:43:21,882 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:21,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:21,882 INFO L82 PathProgramCache]: Analyzing trace with hash 912205891, now seen corresponding path program 40 times [2021-07-13 20:43:21,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:21,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273152953] [2021-07-13 20:43:21,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:21,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:22,169 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-07-13 20:43:22,279 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 20:43:22,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:22,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273152953] [2021-07-13 20:43:22,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273152953] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:22,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736191521] [2021-07-13 20:43:22,279 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 20:43:22,303 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:43:22,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:22,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:43:22,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:22,741 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-07-13 20:43:22,814 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-07-13 20:43:22,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 52 [2021-07-13 20:43:22,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:22,976 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2021-07-13 20:43:22,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:22,994 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-07-13 20:43:22,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 46 [2021-07-13 20:43:22,996 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:23,165 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2021-07-13 20:43:23,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:23,183 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-07-13 20:43:23,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 50 [2021-07-13 20:43:23,185 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:23,331 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2021-07-13 20:43:23,331 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:23,346 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-07-13 20:43:23,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 48 [2021-07-13 20:43:23,347 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:23,483 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2021-07-13 20:43:23,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:23,497 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-07-13 20:43:23,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 43 [2021-07-13 20:43:23,499 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:23,628 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-07-13 20:43:23,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:23,645 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-07-13 20:43:23,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 90 treesize of output 57 [2021-07-13 20:43:23,647 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:23,771 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-07-13 20:43:23,772 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:23,788 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-07-13 20:43:23,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 47 [2021-07-13 20:43:23,791 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:24,023 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 97 [2021-07-13 20:43:24,024 INFO L628 ElimStorePlain]: treesize reduction 8, result has 97.5 percent of original size [2021-07-13 20:43:24,039 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-07-13 20:43:24,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 90 treesize of output 57 [2021-07-13 20:43:24,041 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:24,149 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-07-13 20:43:24,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:24,157 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 20:43:24,157 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:641, output treesize:216 [2021-07-13 20:43:24,307 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-07-13 20:43:24,388 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 20:43:24,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736191521] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:24,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:24,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 20:43:24,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432038204] [2021-07-13 20:43:24,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:43:24,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:24,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:43:24,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:43:24,389 INFO L87 Difference]: Start difference. First operand 1724 states and 5814 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 20:43:24,872 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2021-07-13 20:43:25,279 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-07-13 20:43:25,732 WARN L205 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 132 [2021-07-13 20:43:25,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:25,885 INFO L93 Difference]: Finished difference Result 2315 states and 7617 transitions. [2021-07-13 20:43:25,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:43:25,885 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 20:43:25,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:25,889 INFO L225 Difference]: With dead ends: 2315 [2021-07-13 20:43:25,889 INFO L226 Difference]: Without dead ends: 2296 [2021-07-13 20:43:25,889 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 2045.2ms TimeCoverageRelationStatistics Valid=178, Invalid=634, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:43:25,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2296 states. [2021-07-13 20:43:25,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2296 to 1717. [2021-07-13 20:43:25,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1717 states, 1716 states have (on average 3.374708624708625) internal successors, (5791), 1716 states have internal predecessors, (5791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:25,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1717 states to 1717 states and 5791 transitions. [2021-07-13 20:43:25,914 INFO L78 Accepts]: Start accepts. Automaton has 1717 states and 5791 transitions. Word has length 26 [2021-07-13 20:43:25,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:25,914 INFO L482 AbstractCegarLoop]: Abstraction has 1717 states and 5791 transitions. [2021-07-13 20:43:25,915 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 20:43:25,915 INFO L276 IsEmpty]: Start isEmpty. Operand 1717 states and 5791 transitions. [2021-07-13 20:43:25,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:43:25,917 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:25,917 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 20:43:26,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2567,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:26,132 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:26,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:26,133 INFO L82 PathProgramCache]: Analyzing trace with hash -2073779469, now seen corresponding path program 41 times [2021-07-13 20:43:26,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:26,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000413349] [2021-07-13 20:43:26,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:26,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:26,463 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2021-07-13 20:43:26,617 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 20:43:26,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:26,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000413349] [2021-07-13 20:43:26,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000413349] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:26,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888271809] [2021-07-13 20:43:26,617 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 20:43:26,645 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:43:26,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:26,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:43:26,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:27,118 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-07-13 20:43:27,423 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 68 [2021-07-13 20:43:27,485 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_342, v_prenex_343, v_prenex_344], 3=[A]} [2021-07-13 20:43:27,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:27,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:27,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:27,492 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 20 [2021-07-13 20:43:27,493 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:27,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:27,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:27,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 39 treesize of output 23 [2021-07-13 20:43:27,498 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:27,646 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2021-07-13 20:43:27,647 INFO L628 ElimStorePlain]: treesize reduction 53, result has 81.4 percent of original size [2021-07-13 20:43:27,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:27,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:27,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 35 treesize of output 21 [2021-07-13 20:43:27,652 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:27,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:27,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:27,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:27,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16 [2021-07-13 20:43:27,724 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:27,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:27,793 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:43:27,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 28 [2021-07-13 20:43:27,794 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:27,804 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-07-13 20:43:27,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 52 [2021-07-13 20:43:27,805 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:27,880 INFO L628 ElimStorePlain]: treesize reduction 19, result has 81.4 percent of original size [2021-07-13 20:43:27,883 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 20:43:27,883 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:333, output treesize:59 [2021-07-13 20:43:27,953 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 20:43:27,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888271809] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:27,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:27,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:43:27,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895337079] [2021-07-13 20:43:27,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:43:27,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:27,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:43:27,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:43:27,954 INFO L87 Difference]: Start difference. First operand 1717 states and 5791 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 20:43:28,784 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2021-07-13 20:43:29,279 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-07-13 20:43:29,550 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 84 [2021-07-13 20:43:29,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:29,668 INFO L93 Difference]: Finished difference Result 2241 states and 7399 transitions. [2021-07-13 20:43:29,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:43:29,668 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 20:43:29,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:29,672 INFO L225 Difference]: With dead ends: 2241 [2021-07-13 20:43:29,672 INFO L226 Difference]: Without dead ends: 2226 [2021-07-13 20:43:29,672 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 2414.4ms TimeCoverageRelationStatistics Valid=202, Invalid=920, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:43:29,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2021-07-13 20:43:29,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 1703. [2021-07-13 20:43:29,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1703 states, 1702 states have (on average 3.375440658049354) internal successors, (5745), 1702 states have internal predecessors, (5745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:29,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1703 states to 1703 states and 5745 transitions. [2021-07-13 20:43:29,697 INFO L78 Accepts]: Start accepts. Automaton has 1703 states and 5745 transitions. Word has length 26 [2021-07-13 20:43:29,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:29,697 INFO L482 AbstractCegarLoop]: Abstraction has 1703 states and 5745 transitions. [2021-07-13 20:43:29,697 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 20:43:29,697 INFO L276 IsEmpty]: Start isEmpty. Operand 1703 states and 5745 transitions. [2021-07-13 20:43:29,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:43:29,699 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:29,699 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 20:43:29,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2585 [2021-07-13 20:43:29,915 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:29,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:29,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1720331193, now seen corresponding path program 42 times [2021-07-13 20:43:29,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:29,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222646726] [2021-07-13 20:43:29,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:29,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:30,179 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 20:43:30,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:30,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222646726] [2021-07-13 20:43:30,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222646726] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:30,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859146962] [2021-07-13 20:43:30,180 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 20:43:30,205 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:43:30,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:30,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:43:30,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:30,603 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:43:30,603 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 30 [2021-07-13 20:43:30,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:30,623 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:30,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 44 treesize of output 42 [2021-07-13 20:43:30,624 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:30,636 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:43:30,636 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 31 treesize of output 1 [2021-07-13 20:43:30,637 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:30,649 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:43:30,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 1 [2021-07-13 20:43:30,649 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:30,660 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:43:30,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 35 treesize of output 1 [2021-07-13 20:43:30,661 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:30,670 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:43:30,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 39 treesize of output 23 [2021-07-13 20:43:30,671 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:30,680 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:43:30,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 35 treesize of output 21 [2021-07-13 20:43:30,681 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:30,691 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:43:30,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 20:43:30,691 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:30,701 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:43:30,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 20:43:30,702 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:30,722 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:43:30,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 20:43:30,724 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:30,734 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:43:30,734 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 41 treesize of output 25 [2021-07-13 20:43:30,735 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:30,744 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:43:30,744 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 30 treesize of output 18 [2021-07-13 20:43:30,745 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:30,754 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:43:30,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 13 [2021-07-13 20:43:30,756 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:30,765 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:43:30,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 44 treesize of output 26 [2021-07-13 20:43:30,766 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:30,784 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:43:30,784 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 35 [2021-07-13 20:43:30,786 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:30,792 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:43:30,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 20:43:30,793 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:31,000 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-07-13 20:43:31,000 INFO L628 ElimStorePlain]: treesize reduction 32, result has 81.3 percent of original size [2021-07-13 20:43:31,007 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 20:43:31,007 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:161 [2021-07-13 20:43:31,145 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 20:43:31,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859146962] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:31,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:31,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:43:31,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003395147] [2021-07-13 20:43:31,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:43:31,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:31,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:43:31,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:43:31,146 INFO L87 Difference]: Start difference. First operand 1703 states and 5745 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 20:43:32,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:32,561 INFO L93 Difference]: Finished difference Result 2062 states and 6748 transitions. [2021-07-13 20:43:32,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:43:32,561 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 20:43:32,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:32,564 INFO L225 Difference]: With dead ends: 2062 [2021-07-13 20:43:32,564 INFO L226 Difference]: Without dead ends: 2032 [2021-07-13 20:43:32,565 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 1534.2ms TimeCoverageRelationStatistics Valid=201, Invalid=989, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:43:32,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2032 states. [2021-07-13 20:43:32,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2032 to 1752. [2021-07-13 20:43:32,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 3.371216447744146) internal successors, (5903), 1751 states have internal predecessors, (5903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:32,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 5903 transitions. [2021-07-13 20:43:32,586 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 5903 transitions. Word has length 26 [2021-07-13 20:43:32,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:32,586 INFO L482 AbstractCegarLoop]: Abstraction has 1752 states and 5903 transitions. [2021-07-13 20:43:32,587 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 20:43:32,587 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 5903 transitions. [2021-07-13 20:43:32,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:43:32,619 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:32,619 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 20:43:32,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2594,97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:32,835 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:32,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:32,835 INFO L82 PathProgramCache]: Analyzing trace with hash 339310983, now seen corresponding path program 43 times [2021-07-13 20:43:32,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:32,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800893578] [2021-07-13 20:43:32,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:32,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:33,103 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 62 [2021-07-13 20:43:33,279 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 20:43:33,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:33,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800893578] [2021-07-13 20:43:33,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800893578] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:33,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803286184] [2021-07-13 20:43:33,280 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 20:43:33,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:33,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:43:33,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:33,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:33,531 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:43:33,531 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 30 treesize of output 18 [2021-07-13 20:43:33,531 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:33,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:33,541 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:43:33,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 25 [2021-07-13 20:43:33,542 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:33,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:33,551 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:43:33,551 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 26 treesize of output 1 [2021-07-13 20:43:33,551 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:33,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:33,561 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:33,561 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 44 treesize of output 34 [2021-07-13 20:43:33,562 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:33,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:33,573 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:33,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 20:43:33,574 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:33,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:33,583 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:43:33,583 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 20:43:33,584 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:33,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:33,597 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:43:33,598 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 35 treesize of output 21 [2021-07-13 20:43:33,598 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:33,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:33,608 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:33,609 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 39 treesize of output 31 [2021-07-13 20:43:33,609 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:33,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:33,617 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:43:33,617 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 31 treesize of output 19 [2021-07-13 20:43:33,618 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:33,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:33,626 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:43:33,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 25 [2021-07-13 20:43:33,626 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:33,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:33,635 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:43:33,635 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 1 [2021-07-13 20:43:33,636 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:33,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:33,643 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:43:33,644 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 21 treesize of output 13 [2021-07-13 20:43:33,645 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:33,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:33,652 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:43:33,652 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 36 treesize of output 22 [2021-07-13 20:43:33,653 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:33,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:33,661 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:43:33,661 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 1 [2021-07-13 20:43:33,661 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:33,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:33,668 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:43:33,668 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 44 treesize of output 26 [2021-07-13 20:43:33,669 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:33,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:33,673 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:43:33,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2021-07-13 20:43:33,674 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:33,776 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-07-13 20:43:33,776 INFO L628 ElimStorePlain]: treesize reduction 60, result has 61.3 percent of original size [2021-07-13 20:43:33,779 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:43:33,779 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:88 [2021-07-13 20:43:33,883 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 20:43:33,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803286184] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:33,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:33,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 20:43:33,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805762312] [2021-07-13 20:43:33,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:43:33,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:33,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:43:33,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:43:33,884 INFO L87 Difference]: Start difference. First operand 1752 states and 5903 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 20:43:34,705 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2021-07-13 20:43:34,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:34,881 INFO L93 Difference]: Finished difference Result 2448 states and 8060 transitions. [2021-07-13 20:43:34,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:43:34,881 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 20:43:34,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:34,886 INFO L225 Difference]: With dead ends: 2448 [2021-07-13 20:43:34,886 INFO L226 Difference]: Without dead ends: 2433 [2021-07-13 20:43:34,886 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1271.2ms TimeCoverageRelationStatistics Valid=174, Invalid=582, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:43:34,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2433 states. [2021-07-13 20:43:34,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2433 to 1749. [2021-07-13 20:43:34,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1749 states, 1748 states have (on average 3.372425629290618) internal successors, (5895), 1748 states have internal predecessors, (5895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:34,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1749 states to 1749 states and 5895 transitions. [2021-07-13 20:43:34,913 INFO L78 Accepts]: Start accepts. Automaton has 1749 states and 5895 transitions. Word has length 26 [2021-07-13 20:43:34,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:34,914 INFO L482 AbstractCegarLoop]: Abstraction has 1749 states and 5895 transitions. [2021-07-13 20:43:34,914 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 20:43:34,914 INFO L276 IsEmpty]: Start isEmpty. Operand 1749 states and 5895 transitions. [2021-07-13 20:43:34,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:43:34,916 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:34,916 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 20:43:35,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2636,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:35,130 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:35,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:35,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1589366837, now seen corresponding path program 44 times [2021-07-13 20:43:35,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:35,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139905634] [2021-07-13 20:43:35,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:35,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:35,573 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 20:43:35,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:35,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139905634] [2021-07-13 20:43:35,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139905634] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:35,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960358865] [2021-07-13 20:43:35,574 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 20:43:35,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:43:35,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:35,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:43:35,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:35,951 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-07-13 20:43:35,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 53 [2021-07-13 20:43:35,953 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:36,108 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2021-07-13 20:43:36,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:36,135 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-07-13 20:43:36,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 47 [2021-07-13 20:43:36,140 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:36,440 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 159 [2021-07-13 20:43:36,441 INFO L628 ElimStorePlain]: treesize reduction 8, result has 98.5 percent of original size [2021-07-13 20:43:36,465 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-07-13 20:43:36,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 59 [2021-07-13 20:43:36,466 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:36,610 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2021-07-13 20:43:36,610 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:36,631 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-07-13 20:43:36,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 59 [2021-07-13 20:43:36,633 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:36,775 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2021-07-13 20:43:36,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:36,795 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-07-13 20:43:36,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 43 [2021-07-13 20:43:36,796 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:36,940 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2021-07-13 20:43:36,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:36,957 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-07-13 20:43:36,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 49 [2021-07-13 20:43:36,958 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:37,089 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-07-13 20:43:37,090 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:37,105 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-07-13 20:43:37,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 39 [2021-07-13 20:43:37,106 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:37,231 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-07-13 20:43:37,232 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:37,249 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-07-13 20:43:37,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 43 [2021-07-13 20:43:37,252 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:37,373 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-07-13 20:43:37,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:37,397 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:43:37,397 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 17 variables, input treesize:625, output treesize:405 [2021-07-13 20:43:37,584 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2021-07-13 20:43:37,649 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 20:43:37,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960358865] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:37,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:37,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 20:43:37,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113801111] [2021-07-13 20:43:37,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:43:37,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:37,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:43:37,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:43:37,651 INFO L87 Difference]: Start difference. First operand 1749 states and 5895 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) 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 20:43:38,020 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2021-07-13 20:43:38,201 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 53 [2021-07-13 20:43:38,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:38,557 INFO L93 Difference]: Finished difference Result 2259 states and 7490 transitions. [2021-07-13 20:43:38,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:43:38,557 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) 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 20:43:38,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:38,561 INFO L225 Difference]: With dead ends: 2259 [2021-07-13 20:43:38,561 INFO L226 Difference]: Without dead ends: 2244 [2021-07-13 20:43:38,561 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 1373.0ms TimeCoverageRelationStatistics Valid=180, Invalid=576, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:43:38,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2244 states. [2021-07-13 20:43:38,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2244 to 1752. [2021-07-13 20:43:38,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 3.3757852655625356) internal successors, (5911), 1751 states have internal predecessors, (5911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:38,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 5911 transitions. [2021-07-13 20:43:38,585 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 5911 transitions. Word has length 26 [2021-07-13 20:43:38,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:38,585 INFO L482 AbstractCegarLoop]: Abstraction has 1752 states and 5911 transitions. [2021-07-13 20:43:38,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) 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 20:43:38,585 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 5911 transitions. [2021-07-13 20:43:38,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:43:38,587 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:38,587 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 20:43:38,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2669,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:38,801 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:38,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:38,801 INFO L82 PathProgramCache]: Analyzing trace with hash 755189195, now seen corresponding path program 45 times [2021-07-13 20:43:38,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:38,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715904047] [2021-07-13 20:43:38,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:38,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:39,131 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 20:43:39,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:39,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715904047] [2021-07-13 20:43:39,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715904047] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:39,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768679520] [2021-07-13 20:43:39,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:43:39,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:43:39,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:39,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:43:39,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:39,676 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-07-13 20:43:39,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 55 [2021-07-13 20:43:39,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:40,105 WARN L205 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 184 [2021-07-13 20:43:40,105 INFO L628 ElimStorePlain]: treesize reduction 60, result has 91.1 percent of original size [2021-07-13 20:43:40,129 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-07-13 20:43:40,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 44 [2021-07-13 20:43:40,131 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:40,338 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2021-07-13 20:43:40,338 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:40,362 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-07-13 20:43:40,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 48 [2021-07-13 20:43:40,364 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:40,571 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2021-07-13 20:43:40,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:40,595 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-07-13 20:43:40,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 55 [2021-07-13 20:43:40,601 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:41,078 WARN L205 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 161 [2021-07-13 20:43:41,078 INFO L628 ElimStorePlain]: treesize reduction 13, result has 97.7 percent of original size [2021-07-13 20:43:41,107 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-07-13 20:43:41,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 52 [2021-07-13 20:43:41,112 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:41,523 WARN L205 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 147 [2021-07-13 20:43:41,523 INFO L628 ElimStorePlain]: treesize reduction 8, result has 98.5 percent of original size [2021-07-13 20:43:41,548 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-07-13 20:43:41,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 51 [2021-07-13 20:43:41,551 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:41,936 WARN L205 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 135 [2021-07-13 20:43:41,936 INFO L628 ElimStorePlain]: treesize reduction 4, result has 99.2 percent of original size [2021-07-13 20:43:41,958 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-07-13 20:43:41,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 48 [2021-07-13 20:43:41,962 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:42,143 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-07-13 20:43:42,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:42,161 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-07-13 20:43:42,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 47 [2021-07-13 20:43:42,163 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:42,329 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-07-13 20:43:42,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:42,356 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:43:42,356 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 17 variables, input treesize:673, output treesize:432 [2021-07-13 20:43:42,588 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 52 [2021-07-13 20:43:42,653 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 20:43:42,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768679520] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:42,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:42,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-13 20:43:42,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278563691] [2021-07-13 20:43:42,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:43:42,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:42,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:43:42,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:43:42,654 INFO L87 Difference]: Start difference. First operand 1752 states and 5911 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 20:43:43,012 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2021-07-13 20:43:43,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:43,450 INFO L93 Difference]: Finished difference Result 2323 states and 7689 transitions. [2021-07-13 20:43:43,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:43:43,451 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 20:43:43,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:43,454 INFO L225 Difference]: With dead ends: 2323 [2021-07-13 20:43:43,454 INFO L226 Difference]: Without dead ends: 2308 [2021-07-13 20:43:43,454 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 1324.5ms TimeCoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:43:43,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2308 states. [2021-07-13 20:43:43,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2308 to 1770. [2021-07-13 20:43:43,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1770 states, 1769 states have (on average 3.3719615602035047) internal successors, (5965), 1769 states have internal predecessors, (5965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:43,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1770 states to 1770 states and 5965 transitions. [2021-07-13 20:43:43,480 INFO L78 Accepts]: Start accepts. Automaton has 1770 states and 5965 transitions. Word has length 26 [2021-07-13 20:43:43,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:43,480 INFO L482 AbstractCegarLoop]: Abstraction has 1770 states and 5965 transitions. [2021-07-13 20:43:43,480 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 20:43:43,480 INFO L276 IsEmpty]: Start isEmpty. Operand 1770 states and 5965 transitions. [2021-07-13 20:43:43,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:43:43,483 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:43,483 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 20:43:43,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2699 [2021-07-13 20:43:43,698 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:43,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:43,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1554530479, now seen corresponding path program 46 times [2021-07-13 20:43:43,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:43,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033489089] [2021-07-13 20:43:43,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:43,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:44,076 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 51 [2021-07-13 20:43:44,216 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 20:43:44,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:44,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033489089] [2021-07-13 20:43:44,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033489089] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:44,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583181828] [2021-07-13 20:43:44,217 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 20:43:44,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:43:44,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:44,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:43:44,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:44,672 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-07-13 20:43:44,888 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 65 [2021-07-13 20:43:44,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:44,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:44,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:44,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 18 [2021-07-13 20:43:44,963 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:44,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:44,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:44,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 15 [2021-07-13 20:43:44,969 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:45,077 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2021-07-13 20:43:45,078 INFO L628 ElimStorePlain]: treesize reduction 73, result has 65.9 percent of original size [2021-07-13 20:43:45,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:45,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:45,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 16 [2021-07-13 20:43:45,083 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:45,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:45,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:45,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:45,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 35 treesize of output 21 [2021-07-13 20:43:45,154 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:45,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:45,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:45,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:45,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 20 [2021-07-13 20:43:45,197 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:45,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:45,232 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 20:43:45,232 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:253, output treesize:61 [2021-07-13 20:43:45,298 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 20:43:45,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583181828] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:45,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:45,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 20:43:45,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196459977] [2021-07-13 20:43:45,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:43:45,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:45,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:43:45,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:43:45,299 INFO L87 Difference]: Start difference. First operand 1770 states and 5965 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 20:43:45,560 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2021-07-13 20:43:46,148 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-07-13 20:43:46,405 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 92 [2021-07-13 20:43:46,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:46,507 INFO L93 Difference]: Finished difference Result 2217 states and 7354 transitions. [2021-07-13 20:43:46,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:43:46,507 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 20:43:46,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:46,511 INFO L225 Difference]: With dead ends: 2217 [2021-07-13 20:43:46,511 INFO L226 Difference]: Without dead ends: 2202 [2021-07-13 20:43:46,511 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1869.3ms TimeCoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:43:46,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2202 states. [2021-07-13 20:43:46,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2202 to 1791. [2021-07-13 20:43:46,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1791 states, 1790 states have (on average 3.368715083798883) internal successors, (6030), 1790 states have internal predecessors, (6030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:46,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1791 states to 1791 states and 6030 transitions. [2021-07-13 20:43:46,533 INFO L78 Accepts]: Start accepts. Automaton has 1791 states and 6030 transitions. Word has length 26 [2021-07-13 20:43:46,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:46,533 INFO L482 AbstractCegarLoop]: Abstraction has 1791 states and 6030 transitions. [2021-07-13 20:43:46,533 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 20:43:46,534 INFO L276 IsEmpty]: Start isEmpty. Operand 1791 states and 6030 transitions. [2021-07-13 20:43:46,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:43:46,536 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:46,536 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 20:43:46,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2738,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:46,751 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:46,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:46,751 INFO L82 PathProgramCache]: Analyzing trace with hash -63002301, now seen corresponding path program 47 times [2021-07-13 20:43:46,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:46,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400172322] [2021-07-13 20:43:46,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:46,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:47,112 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 20:43:47,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:47,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400172322] [2021-07-13 20:43:47,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400172322] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:47,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849056381] [2021-07-13 20:43:47,112 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:43:47,139 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:43:47,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:47,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:43:47,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:47,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:47,361 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:47,361 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 27 [2021-07-13 20:43:47,362 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:47,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:47,374 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:43:47,374 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 20 [2021-07-13 20:43:47,376 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:47,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:47,384 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:43:47,384 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 20:43:47,385 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:47,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:47,394 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:43:47,394 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 44 treesize of output 26 [2021-07-13 20:43:47,395 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:47,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:47,406 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:47,406 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 39 treesize of output 31 [2021-07-13 20:43:47,407 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:47,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:47,419 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-07-13 20:43:47,419 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 21 [2021-07-13 20:43:47,420 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:47,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:47,431 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:47,432 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 44 treesize of output 34 [2021-07-13 20:43:47,433 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:47,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:47,443 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:43:47,443 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 35 treesize of output 1 [2021-07-13 20:43:47,444 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:47,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:47,452 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:43:47,452 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 18 [2021-07-13 20:43:47,453 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:47,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:47,461 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:43:47,461 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 20:43:47,462 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:47,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:47,470 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:43:47,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 13 [2021-07-13 20:43:47,472 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:47,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:47,480 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:43:47,481 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 39 treesize of output 23 [2021-07-13 20:43:47,481 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:47,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:47,490 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:43:47,490 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 41 treesize of output 25 [2021-07-13 20:43:47,491 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:47,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:47,500 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:43:47,500 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 1 [2021-07-13 20:43:47,501 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:47,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:47,533 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:43:47,533 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 35 treesize of output 21 [2021-07-13 20:43:47,534 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:47,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:47,539 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:43:47,539 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 31 treesize of output 19 [2021-07-13 20:43:47,540 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:47,611 INFO L628 ElimStorePlain]: treesize reduction 72, result has 52.6 percent of original size [2021-07-13 20:43:47,612 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:43:47,613 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:713, output treesize:80 [2021-07-13 20:43:47,739 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 20:43:47,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849056381] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:47,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:47,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-13 20:43:47,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120746648] [2021-07-13 20:43:47,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:43:47,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:47,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:43:47,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:43:47,740 INFO L87 Difference]: Start difference. First operand 1791 states and 6030 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 20:43:48,100 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2021-07-13 20:43:49,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:49,205 INFO L93 Difference]: Finished difference Result 2500 states and 8240 transitions. [2021-07-13 20:43:49,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:43:49,205 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 20:43:49,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:49,210 INFO L225 Difference]: With dead ends: 2500 [2021-07-13 20:43:49,210 INFO L226 Difference]: Without dead ends: 2485 [2021-07-13 20:43:49,210 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 1603.1ms TimeCoverageRelationStatistics Valid=226, Invalid=896, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:43:49,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2485 states. [2021-07-13 20:43:49,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2485 to 1788. [2021-07-13 20:43:49,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1788 states, 1787 states have (on average 3.369893676552882) internal successors, (6022), 1787 states have internal predecessors, (6022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:49,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1788 states to 1788 states and 6022 transitions. [2021-07-13 20:43:49,239 INFO L78 Accepts]: Start accepts. Automaton has 1788 states and 6022 transitions. Word has length 26 [2021-07-13 20:43:49,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:49,239 INFO L482 AbstractCegarLoop]: Abstraction has 1788 states and 6022 transitions. [2021-07-13 20:43:49,239 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 20:43:49,239 INFO L276 IsEmpty]: Start isEmpty. Operand 1788 states and 6022 transitions. [2021-07-13 20:43:49,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:43:49,241 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:49,241 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 20:43:49,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2749 [2021-07-13 20:43:49,444 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:49,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:49,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1752945205, now seen corresponding path program 48 times [2021-07-13 20:43:49,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:49,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774414802] [2021-07-13 20:43:49,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:49,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:49,742 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2021-07-13 20:43:49,852 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 20:43:49,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:49,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774414802] [2021-07-13 20:43:49,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774414802] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:49,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007179410] [2021-07-13 20:43:49,852 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 20:43:49,932 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:43:49,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:49,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 20:43:49,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:50,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:50,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:50,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:50,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:50,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:50,168 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:43:50,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 25 [2021-07-13 20:43:50,169 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:50,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:50,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:50,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:50,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:50,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:50,183 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:43:50,183 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 20 [2021-07-13 20:43:50,184 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:50,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:50,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:50,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:50,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:50,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:50,198 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:50,199 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 34 [2021-07-13 20:43:50,200 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:50,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:50,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:50,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:50,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:50,212 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:43:50,212 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 21 [2021-07-13 20:43:50,213 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:50,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:50,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:50,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:50,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:50,225 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:43:50,225 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 46 treesize of output 26 [2021-07-13 20:43:50,226 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:50,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:50,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:50,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:50,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:50,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:50,247 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:43:50,247 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 1 [2021-07-13 20:43:50,248 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:50,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:50,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:50,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:50,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:50,259 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:43:50,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 23 [2021-07-13 20:43:50,260 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:50,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:50,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:50,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:50,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:50,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:50,274 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-07-13 20:43:50,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 16 [2021-07-13 20:43:50,275 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:50,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:50,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:50,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:50,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:50,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:50,288 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:43:50,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 1 [2021-07-13 20:43:50,289 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:50,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:50,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:50,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:50,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:50,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:50,301 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:43:50,301 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 44 treesize of output 1 [2021-07-13 20:43:50,301 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:50,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:50,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:50,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:50,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:50,309 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:43:50,309 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 32 treesize of output 18 [2021-07-13 20:43:50,309 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:50,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:50,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:50,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:50,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:50,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:50,318 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:43:50,318 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 20:43:50,318 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:50,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:50,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:50,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:50,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:50,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:50,328 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:50,328 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 39 treesize of output 26 [2021-07-13 20:43:50,330 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:50,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:50,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:50,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:50,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:50,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:50,340 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:50,340 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 48 treesize of output 31 [2021-07-13 20:43:50,341 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:50,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:50,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:50,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:50,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:50,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:50,348 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:43:50,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 20:43:50,349 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:50,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:50,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:50,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:50,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:50,353 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:43:50,353 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 20:43:50,354 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:50,432 INFO L628 ElimStorePlain]: treesize reduction 54, result has 61.4 percent of original size [2021-07-13 20:43:50,433 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:43:50,433 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:833, output treesize:86 [2021-07-13 20:43:50,539 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 20:43:50,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007179410] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:50,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:50,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-13 20:43:50,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942639475] [2021-07-13 20:43:50,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:43:50,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:50,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:43:50,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:43:50,540 INFO L87 Difference]: Start difference. First operand 1788 states and 6022 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 20:43:51,242 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 57 [2021-07-13 20:43:51,536 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 29 [2021-07-13 20:43:51,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:51,668 INFO L93 Difference]: Finished difference Result 2414 states and 7934 transitions. [2021-07-13 20:43:51,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:43:51,668 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 20:43:51,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:51,673 INFO L225 Difference]: With dead ends: 2414 [2021-07-13 20:43:51,673 INFO L226 Difference]: Without dead ends: 2368 [2021-07-13 20:43:51,673 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 1376.2ms TimeCoverageRelationStatistics Valid=182, Invalid=748, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:43:51,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2368 states. [2021-07-13 20:43:51,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2368 to 1811. [2021-07-13 20:43:51,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1811 states, 1810 states have (on average 3.372375690607735) internal successors, (6104), 1810 states have internal predecessors, (6104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:51,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1811 states to 1811 states and 6104 transitions. [2021-07-13 20:43:51,725 INFO L78 Accepts]: Start accepts. Automaton has 1811 states and 6104 transitions. Word has length 26 [2021-07-13 20:43:51,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:51,725 INFO L482 AbstractCegarLoop]: Abstraction has 1811 states and 6104 transitions. [2021-07-13 20:43:51,725 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 20:43:51,725 INFO L276 IsEmpty]: Start isEmpty. Operand 1811 states and 6104 transitions. [2021-07-13 20:43:51,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:43:51,728 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:51,728 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 20:43:51,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2760 [2021-07-13 20:43:51,941 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:51,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:51,941 INFO L82 PathProgramCache]: Analyzing trace with hash 731595527, now seen corresponding path program 49 times [2021-07-13 20:43:51,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:51,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189716333] [2021-07-13 20:43:51,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:51,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:52,277 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 71 [2021-07-13 20:43:52,407 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 20:43:52,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:52,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189716333] [2021-07-13 20:43:52,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189716333] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:52,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344687304] [2021-07-13 20:43:52,407 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 20:43:52,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:52,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:43:52,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:52,812 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_390, v_prenex_388, v_prenex_389], 3=[A]} [2021-07-13 20:43:52,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:52,826 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:52,827 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 21 [2021-07-13 20:43:52,829 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:52,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:52,841 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:43:52,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 20 [2021-07-13 20:43:52,843 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:52,993 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-07-13 20:43:52,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:52,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:53,007 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:53,007 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 44 treesize of output 34 [2021-07-13 20:43:53,008 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:53,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:53,018 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:43:53,018 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 35 treesize of output 1 [2021-07-13 20:43:53,019 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:53,134 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-07-13 20:43:53,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:53,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:53,148 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:53,148 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 39 treesize of output 31 [2021-07-13 20:43:53,149 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:53,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:53,159 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-07-13 20:43:53,160 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 30 treesize of output 21 [2021-07-13 20:43:53,160 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:53,366 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 76 [2021-07-13 20:43:53,367 INFO L628 ElimStorePlain]: treesize reduction 3, result has 99.0 percent of original size [2021-07-13 20:43:53,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:53,383 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-07-13 20:43:53,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 45 [2021-07-13 20:43:53,384 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:53,397 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-07-13 20:43:53,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 52 [2021-07-13 20:43:53,398 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:53,578 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2021-07-13 20:43:53,578 INFO L628 ElimStorePlain]: treesize reduction 32, result has 85.1 percent of original size [2021-07-13 20:43:53,583 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-07-13 20:43:53,583 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:442, output treesize:160 [2021-07-13 20:43:53,738 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 20:43:53,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344687304] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:53,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:53,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 20:43:53,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895466766] [2021-07-13 20:43:53,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:43:53,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:53,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:43:53,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:43:53,739 INFO L87 Difference]: Start difference. First operand 1811 states and 6104 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 20:43:54,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:54,353 INFO L93 Difference]: Finished difference Result 2322 states and 7708 transitions. [2021-07-13 20:43:54,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:43:54,353 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 20:43:54,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:54,357 INFO L225 Difference]: With dead ends: 2322 [2021-07-13 20:43:54,357 INFO L226 Difference]: Without dead ends: 2307 [2021-07-13 20:43:54,357 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1143.0ms TimeCoverageRelationStatistics Valid=137, Invalid=463, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:43:54,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2307 states. [2021-07-13 20:43:54,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2307 to 1811. [2021-07-13 20:43:54,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1811 states, 1810 states have (on average 3.372375690607735) internal successors, (6104), 1810 states have internal predecessors, (6104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:54,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1811 states to 1811 states and 6104 transitions. [2021-07-13 20:43:54,382 INFO L78 Accepts]: Start accepts. Automaton has 1811 states and 6104 transitions. Word has length 26 [2021-07-13 20:43:54,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:54,382 INFO L482 AbstractCegarLoop]: Abstraction has 1811 states and 6104 transitions. [2021-07-13 20:43:54,382 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 20:43:54,382 INFO L276 IsEmpty]: Start isEmpty. Operand 1811 states and 6104 transitions. [2021-07-13 20:43:54,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:43:54,384 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:54,384 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 20:43:54,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2781,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:54,600 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:54,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:54,600 INFO L82 PathProgramCache]: Analyzing trace with hash 396904007, now seen corresponding path program 55 times [2021-07-13 20:43:54,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:54,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627385689] [2021-07-13 20:43:54,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:54,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:55,028 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 20:43:55,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:55,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627385689] [2021-07-13 20:43:55,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627385689] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:55,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534504940] [2021-07-13 20:43:55,028 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 20:43:55,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:55,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:43:55,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:55,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:55,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:55,445 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-07-13 20:43:55,445 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 6 new quantified variables, introduced 4 case distinctions, treesize of input 119 treesize of output 1 [2021-07-13 20:43:55,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:55,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:55,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:55,473 INFO L354 Elim1Store]: treesize reduction 30, result has 18.9 percent of original size [2021-07-13 20:43:55,473 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 6 new quantified variables, introduced 4 case distinctions, treesize of input 95 treesize of output 57 [2021-07-13 20:43:55,475 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:55,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:55,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:55,492 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-07-13 20:43:55,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 88 treesize of output 47 [2021-07-13 20:43:55,493 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:55,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:55,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:55,511 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-07-13 20:43:55,511 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 6 new quantified variables, introduced 4 case distinctions, treesize of input 129 treesize of output 1 [2021-07-13 20:43:55,512 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:55,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:55,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:55,529 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-07-13 20:43:55,529 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 6 new quantified variables, introduced 4 case distinctions, treesize of input 85 treesize of output 1 [2021-07-13 20:43:55,530 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:55,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:55,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:55,546 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-07-13 20:43:55,547 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 6 new quantified variables, introduced 4 case distinctions, treesize of input 66 treesize of output 42 [2021-07-13 20:43:55,548 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:55,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:55,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:55,566 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-07-13 20:43:55,567 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 6 new quantified variables, introduced 4 case distinctions, treesize of input 76 treesize of output 1 [2021-07-13 20:43:55,567 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:55,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:55,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:55,585 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-07-13 20:43:55,585 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 6 new quantified variables, introduced 4 case distinctions, treesize of input 83 treesize of output 1 [2021-07-13 20:43:55,586 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:55,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:55,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:55,603 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-07-13 20:43:55,603 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 6 new quantified variables, introduced 4 case distinctions, treesize of input 93 treesize of output 1 [2021-07-13 20:43:55,604 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:55,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:55,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:55,621 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-07-13 20:43:55,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 66 treesize of output 1 [2021-07-13 20:43:55,622 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:55,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:55,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:55,640 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-07-13 20:43:55,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 124 treesize of output 1 [2021-07-13 20:43:55,640 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:55,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:55,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:55,657 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-07-13 20:43:55,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 85 treesize of output 1 [2021-07-13 20:43:55,658 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:55,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:55,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:55,684 INFO L354 Elim1Store]: treesize reduction 30, result has 18.9 percent of original size [2021-07-13 20:43:55,684 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 6 new quantified variables, introduced 4 case distinctions, treesize of input 119 treesize of output 55 [2021-07-13 20:43:55,685 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:55,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:55,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:55,705 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-07-13 20:43:55,706 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 6 new quantified variables, introduced 4 case distinctions, treesize of input 90 treesize of output 1 [2021-07-13 20:43:55,706 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:55,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:55,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:55,723 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-07-13 20:43:55,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 71 treesize of output 45 [2021-07-13 20:43:55,725 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:55,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:55,731 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-07-13 20:43:55,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 83 treesize of output 44 [2021-07-13 20:43:55,733 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:55,773 INFO L628 ElimStorePlain]: treesize reduction 45, result has 47.7 percent of original size [2021-07-13 20:43:55,774 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 20:43:55,775 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:1653, output treesize:29 [2021-07-13 20:43:55,808 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 20:43:55,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534504940] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:55,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:55,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-07-13 20:43:55,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537102376] [2021-07-13 20:43:55,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:43:55,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:55,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:43:55,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:43:55,809 INFO L87 Difference]: Start difference. First operand 1811 states and 6104 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 20:43:56,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:56,443 INFO L93 Difference]: Finished difference Result 2373 states and 7573 transitions. [2021-07-13 20:43:56,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:43:56,444 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 20:43:56,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:56,448 INFO L225 Difference]: With dead ends: 2373 [2021-07-13 20:43:56,448 INFO L226 Difference]: Without dead ends: 2336 [2021-07-13 20:43:56,448 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 923.6ms TimeCoverageRelationStatistics Valid=200, Invalid=792, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:43:56,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2336 states. [2021-07-13 20:43:56,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2336 to 1833. [2021-07-13 20:43:56,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1833 states, 1832 states have (on average 3.3717248908296944) internal successors, (6177), 1832 states have internal predecessors, (6177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:56,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1833 states to 1833 states and 6177 transitions. [2021-07-13 20:43:56,475 INFO L78 Accepts]: Start accepts. Automaton has 1833 states and 6177 transitions. Word has length 26 [2021-07-13 20:43:56,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:56,475 INFO L482 AbstractCegarLoop]: Abstraction has 1833 states and 6177 transitions. [2021-07-13 20:43:56,475 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 20:43:56,475 INFO L276 IsEmpty]: Start isEmpty. Operand 1833 states and 6177 transitions. [2021-07-13 20:43:56,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:43:56,477 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:56,477 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 20:43:56,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2810 [2021-07-13 20:43:56,693 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:56,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:56,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1464778571, now seen corresponding path program 56 times [2021-07-13 20:43:56,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:56,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917817540] [2021-07-13 20:43:56,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:56,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:56,998 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 20:43:56,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:56,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917817540] [2021-07-13 20:43:56,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917817540] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:56,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731522533] [2021-07-13 20:43:56,998 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 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 20:43:57,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:43:57,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:57,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:43:57,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:57,268 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-07-13 20:43:57,340 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_391, v_prenex_395], 5=[A, v_prenex_393]} [2021-07-13 20:43:57,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:57,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:57,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:57,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:57,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 18 [2021-07-13 20:43:57,351 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:57,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:57,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:57,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:57,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 12 [2021-07-13 20:43:57,356 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:57,469 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2021-07-13 20:43:57,470 INFO L628 ElimStorePlain]: treesize reduction 199, result has 46.8 percent of original size [2021-07-13 20:43:57,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:57,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:57,474 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2021-07-13 20:43:57,474 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:57,513 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:57,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:57,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:57,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:57,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:57,518 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 50 treesize of output 24 [2021-07-13 20:43:57,519 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:57,553 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:57,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:57,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:57,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:57,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:57,557 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 14 [2021-07-13 20:43:57,557 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:57,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:57,589 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 20:43:57,589 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:445, output treesize:55 [2021-07-13 20:43:57,639 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 20:43:57,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731522533] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:57,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:57,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-07-13 20:43:57,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682807203] [2021-07-13 20:43:57,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:43:57,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:57,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:43:57,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:43:57,640 INFO L87 Difference]: Start difference. First operand 1833 states and 6177 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 20:43:58,213 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-07-13 20:43:58,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:58,304 INFO L93 Difference]: Finished difference Result 2211 states and 7333 transitions. [2021-07-13 20:43:58,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:43:58,305 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 20:43:58,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:58,309 INFO L225 Difference]: With dead ends: 2211 [2021-07-13 20:43:58,309 INFO L226 Difference]: Without dead ends: 2180 [2021-07-13 20:43:58,310 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 899.1ms TimeCoverageRelationStatistics Valid=165, Invalid=591, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:43:58,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2180 states. [2021-07-13 20:43:58,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2180 to 1833. [2021-07-13 20:43:58,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1833 states, 1832 states have (on average 3.368449781659389) internal successors, (6171), 1832 states have internal predecessors, (6171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:58,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1833 states to 1833 states and 6171 transitions. [2021-07-13 20:43:58,338 INFO L78 Accepts]: Start accepts. Automaton has 1833 states and 6171 transitions. Word has length 26 [2021-07-13 20:43:58,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:58,339 INFO L482 AbstractCegarLoop]: Abstraction has 1833 states and 6171 transitions. [2021-07-13 20:43:58,339 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 20:43:58,339 INFO L276 IsEmpty]: Start isEmpty. Operand 1833 states and 6171 transitions. [2021-07-13 20:43:58,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:43:58,341 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:58,341 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 20:43:58,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2868,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:58,557 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:58,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:58,557 INFO L82 PathProgramCache]: Analyzing trace with hash -192487861, now seen corresponding path program 57 times [2021-07-13 20:43:58,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:58,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224040879] [2021-07-13 20:43:58,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:58,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:58,921 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 20:43:58,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:58,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224040879] [2021-07-13 20:43:58,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224040879] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:58,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868516292] [2021-07-13 20:43:58,921 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 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 20:43:58,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:43:58,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:58,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:43:58,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:59,376 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-07-13 20:43:59,655 INFO L446 ElimStorePlain]: Different costs {5=[v_prenex_408, v_prenex_409], 6=[v_prenex_404, v_prenex_405, A, v_prenex_407, v_prenex_411, v_prenex_413]} [2021-07-13 20:43:59,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:59,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:59,694 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-13 20:43:59,695 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 39 [2021-07-13 20:43:59,697 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:59,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:59,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:59,731 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-13 20:43:59,731 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 52 treesize of output 44 [2021-07-13 20:43:59,733 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:00,598 WARN L205 SmtUtils]: Spent 864.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 221 [2021-07-13 20:44:00,598 INFO L628 ElimStorePlain]: treesize reduction 38, result has 97.9 percent of original size [2021-07-13 20:44:00,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:00,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:00,640 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-07-13 20:44:00,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 48 [2021-07-13 20:44:00,642 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:00,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:00,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:00,668 INFO L354 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2021-07-13 20:44:00,668 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 39 treesize of output 28 [2021-07-13 20:44:00,669 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:01,124 WARN L205 SmtUtils]: Spent 455.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2021-07-13 20:44:01,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:01,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:01,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:01,205 INFO L354 Elim1Store]: treesize reduction 8, result has 78.4 percent of original size [2021-07-13 20:44:01,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 95 treesize of output 85 [2021-07-13 20:44:01,212 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:01,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:01,241 INFO L354 Elim1Store]: treesize reduction 34, result has 24.4 percent of original size [2021-07-13 20:44:01,241 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 114 treesize of output 70 [2021-07-13 20:44:01,243 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:01,688 WARN L205 SmtUtils]: Spent 444.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2021-07-13 20:44:01,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:01,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:01,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:01,730 INFO L354 Elim1Store]: treesize reduction 20, result has 45.9 percent of original size [2021-07-13 20:44:01,730 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 6 new quantified variables, introduced 4 case distinctions, treesize of input 109 treesize of output 73 [2021-07-13 20:44:01,733 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:01,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:01,748 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-07-13 20:44:01,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 90 treesize of output 1 [2021-07-13 20:44:01,748 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:02,053 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2021-07-13 20:44:02,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:02,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:02,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:02,084 INFO L354 Elim1Store]: treesize reduction 20, result has 45.9 percent of original size [2021-07-13 20:44:02,084 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 6 new quantified variables, introduced 4 case distinctions, treesize of input 162 treesize of output 84 [2021-07-13 20:44:02,088 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:02,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:02,107 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-07-13 20:44:02,107 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 116 treesize of output 65 [2021-07-13 20:44:02,108 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:02,595 WARN L205 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 154 [2021-07-13 20:44:02,596 INFO L628 ElimStorePlain]: treesize reduction 12, result has 98.9 percent of original size [2021-07-13 20:44:02,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:02,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:02,624 INFO L354 Elim1Store]: treesize reduction 24, result has 35.1 percent of original size [2021-07-13 20:44:02,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 116 treesize of output 71 [2021-07-13 20:44:02,626 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:02,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:02,657 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-07-13 20:44:02,657 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 162 treesize of output 96 [2021-07-13 20:44:02,664 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:03,059 WARN L205 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 133 [2021-07-13 20:44:03,060 INFO L628 ElimStorePlain]: treesize reduction 34, result has 96.0 percent of original size [2021-07-13 20:44:03,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:03,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:03,092 INFO L354 Elim1Store]: treesize reduction 20, result has 45.9 percent of original size [2021-07-13 20:44:03,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 109 treesize of output 73 [2021-07-13 20:44:03,095 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:03,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:03,106 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-07-13 20:44:03,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 90 treesize of output 1 [2021-07-13 20:44:03,107 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:03,262 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-07-13 20:44:03,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:03,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:03,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:03,294 INFO L354 Elim1Store]: treesize reduction 20, result has 45.9 percent of original size [2021-07-13 20:44:03,294 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 6 new quantified variables, introduced 4 case distinctions, treesize of input 121 treesize of output 78 [2021-07-13 20:44:03,298 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:03,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:03,319 INFO L354 Elim1Store]: treesize reduction 28, result has 37.8 percent of original size [2021-07-13 20:44:03,319 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 167 treesize of output 87 [2021-07-13 20:44:03,323 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:03,577 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 86 [2021-07-13 20:44:03,578 INFO L628 ElimStorePlain]: treesize reduction 66, result has 83.2 percent of original size [2021-07-13 20:44:03,584 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 11 xjuncts. [2021-07-13 20:44:03,585 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:1858, output treesize:310 [2021-07-13 20:44:03,727 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 20:44:03,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868516292] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:03,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:03,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-13 20:44:03,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470724557] [2021-07-13 20:44:03,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:44:03,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:03,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:44:03,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:44:03,728 INFO L87 Difference]: Start difference. First operand 1833 states and 6171 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 20:44:04,776 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-07-13 20:44:04,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:04,952 INFO L93 Difference]: Finished difference Result 2363 states and 7827 transitions. [2021-07-13 20:44:04,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:44:04,953 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 20:44:04,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:04,956 INFO L225 Difference]: With dead ends: 2363 [2021-07-13 20:44:04,957 INFO L226 Difference]: Without dead ends: 2348 [2021-07-13 20:44:04,957 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1571.6ms TimeCoverageRelationStatistics Valid=213, Invalid=977, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:44:04,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2348 states. [2021-07-13 20:44:04,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2348 to 1833. [2021-07-13 20:44:04,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1833 states, 1832 states have (on average 3.368449781659389) internal successors, (6171), 1832 states have internal predecessors, (6171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:04,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1833 states to 1833 states and 6171 transitions. [2021-07-13 20:44:04,981 INFO L78 Accepts]: Start accepts. Automaton has 1833 states and 6171 transitions. Word has length 26 [2021-07-13 20:44:04,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:04,981 INFO L482 AbstractCegarLoop]: Abstraction has 1833 states and 6171 transitions. [2021-07-13 20:44:04,981 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 20:44:04,981 INFO L276 IsEmpty]: Start isEmpty. Operand 1833 states and 6171 transitions. [2021-07-13 20:44:04,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:44:04,983 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:04,983 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 20:44:05,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2882,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:05,197 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:05,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:05,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1845763381, now seen corresponding path program 50 times [2021-07-13 20:44:05,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:05,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685277214] [2021-07-13 20:44:05,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:05,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:05,670 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 20:44:05,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:05,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685277214] [2021-07-13 20:44:05,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685277214] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:05,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955370350] [2021-07-13 20:44:05,670 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 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 20:44:05,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:44:05,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:05,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:44:05,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:05,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:05,972 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:05,972 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 27 [2021-07-13 20:44:05,973 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:05,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:05,986 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:44:05,986 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 20 [2021-07-13 20:44:05,987 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:05,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:05,996 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:44:05,996 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 20:44:05,997 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:06,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:06,005 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:44:06,005 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 44 treesize of output 26 [2021-07-13 20:44:06,006 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:06,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:06,017 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:06,017 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 39 treesize of output 31 [2021-07-13 20:44:06,019 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:06,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:06,030 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-07-13 20:44:06,031 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 21 [2021-07-13 20:44:06,031 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:06,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:06,043 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:06,043 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 44 treesize of output 34 [2021-07-13 20:44:06,044 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:06,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:06,054 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:44:06,054 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 35 treesize of output 1 [2021-07-13 20:44:06,055 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:06,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:06,063 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:44:06,063 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 18 [2021-07-13 20:44:06,063 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:06,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:06,072 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:44:06,072 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 36 treesize of output 22 [2021-07-13 20:44:06,073 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:06,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:06,081 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:44:06,081 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 21 treesize of output 13 [2021-07-13 20:44:06,082 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:06,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:06,091 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:44:06,091 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 39 treesize of output 23 [2021-07-13 20:44:06,091 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:06,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:06,100 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:44:06,100 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 41 treesize of output 25 [2021-07-13 20:44:06,101 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:06,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:06,109 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:44:06,109 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 26 treesize of output 1 [2021-07-13 20:44:06,110 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:06,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:06,117 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:44:06,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 21 [2021-07-13 20:44:06,118 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:06,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:06,123 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:44:06,123 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 20:44:06,124 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:06,196 INFO L628 ElimStorePlain]: treesize reduction 72, result has 52.6 percent of original size [2021-07-13 20:44:06,197 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:44:06,197 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:713, output treesize:80 [2021-07-13 20:44:06,322 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 20:44:06,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955370350] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:06,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:06,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-13 20:44:06,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381122860] [2021-07-13 20:44:06,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:44:06,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:06,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:44:06,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:44:06,323 INFO L87 Difference]: Start difference. First operand 1833 states and 6171 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 20:44:06,737 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2021-07-13 20:44:07,441 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2021-07-13 20:44:07,605 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2021-07-13 20:44:07,751 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2021-07-13 20:44:08,010 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 83 [2021-07-13 20:44:08,512 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-07-13 20:44:08,758 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2021-07-13 20:44:08,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:08,817 INFO L93 Difference]: Finished difference Result 2484 states and 8143 transitions. [2021-07-13 20:44:08,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:44:08,818 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 20:44:08,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:08,822 INFO L225 Difference]: With dead ends: 2484 [2021-07-13 20:44:08,822 INFO L226 Difference]: Without dead ends: 2469 [2021-07-13 20:44:08,822 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 2578.6ms TimeCoverageRelationStatistics Valid=281, Invalid=1359, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:44:08,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2469 states. [2021-07-13 20:44:08,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2469 to 1840. [2021-07-13 20:44:08,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1840 states, 1839 states have (on average 3.368678629690049) internal successors, (6195), 1839 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 20:44:08,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1840 states to 1840 states and 6195 transitions. [2021-07-13 20:44:08,849 INFO L78 Accepts]: Start accepts. Automaton has 1840 states and 6195 transitions. Word has length 26 [2021-07-13 20:44:08,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:08,849 INFO L482 AbstractCegarLoop]: Abstraction has 1840 states and 6195 transitions. [2021-07-13 20:44:08,849 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 20:44:08,849 INFO L276 IsEmpty]: Start isEmpty. Operand 1840 states and 6195 transitions. [2021-07-13 20:44:08,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:44:08,852 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:08,852 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 20:44:09,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2945,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:09,067 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:09,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:09,067 INFO L82 PathProgramCache]: Analyzing trace with hash -295381817, now seen corresponding path program 58 times [2021-07-13 20:44:09,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:09,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190820419] [2021-07-13 20:44:09,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:09,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:09,324 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 20:44:09,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:09,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190820419] [2021-07-13 20:44:09,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190820419] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:09,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906215164] [2021-07-13 20:44:09,324 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 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 20:44:09,347 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:44:09,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:09,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:44:09,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:09,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:09,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:09,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:09,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:09,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:09,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:09,840 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 56 treesize of output 28 [2021-07-13 20:44:09,840 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:09,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:09,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:09,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:09,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:09,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:09,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:09,847 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 23 [2021-07-13 20:44:09,847 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:09,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:09,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:09,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:09,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:09,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:09,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:09,854 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 52 treesize of output 28 [2021-07-13 20:44:09,855 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:09,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:09,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:09,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:09,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:09,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:09,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:09,862 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 64 treesize of output 24 [2021-07-13 20:44:09,862 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:09,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:09,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:09,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:09,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:09,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:09,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:09,870 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 47 treesize of output 25 [2021-07-13 20:44:09,870 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:09,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:09,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:09,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:09,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:09,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:09,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:09,877 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 51 treesize of output 25 [2021-07-13 20:44:09,877 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:09,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:09,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:09,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:09,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:09,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:09,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:09,885 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 39 treesize of output 18 [2021-07-13 20:44:09,885 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:09,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:09,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:09,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:09,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:09,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:09,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:09,892 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 40 treesize of output 20 [2021-07-13 20:44:09,892 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:09,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:09,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:09,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:09,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:09,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:09,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:09,899 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 44 treesize of output 14 [2021-07-13 20:44:09,900 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:09,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:09,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:09,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:09,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:09,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:09,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:09,907 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 20 [2021-07-13 20:44:09,907 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:09,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:09,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:09,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:09,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:09,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:09,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:09,914 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 53 treesize of output 24 [2021-07-13 20:44:09,914 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:09,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:09,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:09,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:09,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:09,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:09,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:09,921 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 18 [2021-07-13 20:44:09,921 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:09,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:09,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:09,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:09,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:09,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:09,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:09,928 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 12 [2021-07-13 20:44:09,928 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:09,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:09,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:09,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:09,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:09,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:09,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:09,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 24 [2021-07-13 20:44:09,935 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:09,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:09,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:09,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:09,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:09,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:09,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:09,941 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 44 treesize of output 18 [2021-07-13 20:44:09,942 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:09,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:09,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:09,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:09,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:09,945 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 23 [2021-07-13 20:44:09,946 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:09,966 INFO L628 ElimStorePlain]: treesize reduction 60, result has 24.1 percent of original size [2021-07-13 20:44:09,967 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:44:09,967 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:937, output treesize:13 [2021-07-13 20:44:09,996 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 20:44:09,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906215164] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:09,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:09,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-07-13 20:44:09,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392594673] [2021-07-13 20:44:09,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:44:09,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:09,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:44:09,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:44:09,997 INFO L87 Difference]: Start difference. First operand 1840 states and 6195 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 20:44:11,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:11,399 INFO L93 Difference]: Finished difference Result 2777 states and 8773 transitions. [2021-07-13 20:44:11,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:44:11,399 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 20:44:11,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:11,404 INFO L225 Difference]: With dead ends: 2777 [2021-07-13 20:44:11,405 INFO L226 Difference]: Without dead ends: 2740 [2021-07-13 20:44:11,405 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 1392.1ms TimeCoverageRelationStatistics Valid=295, Invalid=1345, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:44:11,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2740 states. [2021-07-13 20:44:11,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2740 to 1885. [2021-07-13 20:44:11,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1885 states, 1884 states have (on average 3.379511677282378) internal successors, (6367), 1884 states have internal predecessors, (6367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:11,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1885 states to 1885 states and 6367 transitions. [2021-07-13 20:44:11,435 INFO L78 Accepts]: Start accepts. Automaton has 1885 states and 6367 transitions. Word has length 26 [2021-07-13 20:44:11,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:11,435 INFO L482 AbstractCegarLoop]: Abstraction has 1885 states and 6367 transitions. [2021-07-13 20:44:11,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 20:44:11,435 INFO L276 IsEmpty]: Start isEmpty. Operand 1885 states and 6367 transitions. [2021-07-13 20:44:11,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:44:11,438 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:11,438 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 20:44:11,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2956,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:11,653 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:11,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:11,653 INFO L82 PathProgramCache]: Analyzing trace with hash -69388293, now seen corresponding path program 59 times [2021-07-13 20:44:11,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:11,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217255840] [2021-07-13 20:44:11,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:11,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:11,855 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 20:44:11,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:11,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217255840] [2021-07-13 20:44:11,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217255840] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:11,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73147979] [2021-07-13 20:44:11,855 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 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 20:44:11,881 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:44:11,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:11,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:44:11,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:12,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:12,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:12,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:12,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:12,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:12,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:12,394 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 58 treesize of output 30 [2021-07-13 20:44:12,395 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:12,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:12,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:12,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:12,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:12,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:12,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:12,403 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 18 [2021-07-13 20:44:12,404 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:12,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:12,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:12,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:12,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:12,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:12,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:12,411 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 44 treesize of output 24 [2021-07-13 20:44:12,412 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:12,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:12,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:12,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:12,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:12,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:12,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:12,420 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 73 treesize of output 37 [2021-07-13 20:44:12,421 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:12,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:12,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:12,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:12,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:12,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:12,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:12,430 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 51 treesize of output 24 [2021-07-13 20:44:12,431 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:12,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:12,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:12,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:12,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:12,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:12,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:12,440 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 53 treesize of output 27 [2021-07-13 20:44:12,441 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:12,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:12,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:12,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:12,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:12,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:12,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:12,450 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 61 treesize of output 31 [2021-07-13 20:44:12,451 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:12,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:12,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:12,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:12,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:12,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:12,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:12,460 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 46 treesize of output 24 [2021-07-13 20:44:12,461 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:12,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:12,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:12,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:12,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:12,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:12,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:12,471 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 65 treesize of output 33 [2021-07-13 20:44:12,472 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:12,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:12,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:12,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:12,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:12,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:12,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:12,481 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 50 treesize of output 26 [2021-07-13 20:44:12,482 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:12,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:12,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:12,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:12,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:12,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:12,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:12,491 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 23 [2021-07-13 20:44:12,492 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:12,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:12,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:12,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:12,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:12,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:12,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:12,501 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 59 treesize of output 31 [2021-07-13 20:44:12,503 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:12,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:12,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:12,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:12,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:12,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:12,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:12,512 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 54 treesize of output 28 [2021-07-13 20:44:12,513 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:12,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:12,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:12,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:12,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:12,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:12,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:12,523 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 62 treesize of output 32 [2021-07-13 20:44:12,524 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:12,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:12,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:12,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:12,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:12,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:12,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:12,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 26 [2021-07-13 20:44:12,534 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:12,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:12,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:12,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:12,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:12,539 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 46 treesize of output 24 [2021-07-13 20:44:12,540 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:12,619 INFO L628 ElimStorePlain]: treesize reduction 349, result has 11.9 percent of original size [2021-07-13 20:44:12,620 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 20:44:12,620 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:1077, output treesize:41 [2021-07-13 20:44:12,692 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 20:44:12,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73147979] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:12,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:12,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:44:12,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36628684] [2021-07-13 20:44:12,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:44:12,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:12,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:44:12,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:44:12,693 INFO L87 Difference]: Start difference. First operand 1885 states and 6367 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) 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 20:44:14,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:14,059 INFO L93 Difference]: Finished difference Result 3099 states and 9931 transitions. [2021-07-13 20:44:14,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:44:14,060 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) 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 26 [2021-07-13 20:44:14,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:14,066 INFO L225 Difference]: With dead ends: 3099 [2021-07-13 20:44:14,066 INFO L226 Difference]: Without dead ends: 3069 [2021-07-13 20:44:14,066 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1305.9ms TimeCoverageRelationStatistics Valid=269, Invalid=1137, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:44:14,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3069 states. [2021-07-13 20:44:14,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3069 to 1905. [2021-07-13 20:44:14,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1905 states, 1904 states have (on average 3.3891806722689077) internal successors, (6453), 1904 states have internal predecessors, (6453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:14,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1905 states to 1905 states and 6453 transitions. [2021-07-13 20:44:14,103 INFO L78 Accepts]: Start accepts. Automaton has 1905 states and 6453 transitions. Word has length 26 [2021-07-13 20:44:14,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:14,103 INFO L482 AbstractCegarLoop]: Abstraction has 1905 states and 6453 transitions. [2021-07-13 20:44:14,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.4705882352941178) 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 20:44:14,103 INFO L276 IsEmpty]: Start isEmpty. Operand 1905 states and 6453 transitions. [2021-07-13 20:44:14,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:44:14,106 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:14,106 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 20:44:14,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3062 [2021-07-13 20:44:14,321 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:14,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:14,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1764260359, now seen corresponding path program 60 times [2021-07-13 20:44:14,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:14,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379071079] [2021-07-13 20:44:14,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:14,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:14,512 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 20:44:14,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:14,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379071079] [2021-07-13 20:44:14,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379071079] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:14,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641005341] [2021-07-13 20:44:14,512 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 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 20:44:14,536 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:44:14,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:14,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 20:44:14,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:14,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:14,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:14,748 INFO L354 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2021-07-13 20:44:14,748 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 35 [2021-07-13 20:44:14,749 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:14,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:14,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:14,768 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:14,768 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 62 treesize of output 58 [2021-07-13 20:44:14,775 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:14,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:14,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:14,802 INFO L354 Elim1Store]: treesize reduction 4, result has 85.2 percent of original size [2021-07-13 20:44:14,802 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 42 treesize of output 44 [2021-07-13 20:44:14,807 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:14,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:14,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:14,865 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-07-13 20:44:14,866 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 51 treesize of output 39 [2021-07-13 20:44:14,869 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:14,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:14,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:14,912 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-07-13 20:44:14,912 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 41 treesize of output 35 [2021-07-13 20:44:14,915 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:14,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:14,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:14,930 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:44:14,930 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 45 treesize of output 1 [2021-07-13 20:44:14,930 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:14,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:14,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:14,979 INFO L354 Elim1Store]: treesize reduction 4, result has 85.2 percent of original size [2021-07-13 20:44:14,979 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 46 treesize of output 46 [2021-07-13 20:44:14,982 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:14,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:14,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:15,006 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:44:15,006 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 38 treesize of output 20 [2021-07-13 20:44:15,007 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:15,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:15,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:15,034 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:44:15,034 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 20:44:15,035 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:15,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:15,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:15,049 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:44:15,050 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 18 [2021-07-13 20:44:15,051 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:15,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:15,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:15,073 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:44:15,073 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 38 treesize of output 20 [2021-07-13 20:44:15,074 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:15,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:15,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:15,101 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:44:15,101 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 54 treesize of output 1 [2021-07-13 20:44:15,102 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:15,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:15,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:15,118 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:44:15,118 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 47 treesize of output 1 [2021-07-13 20:44:15,119 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:15,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:15,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:15,143 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:44:15,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 1 [2021-07-13 20:44:15,144 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:15,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:15,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:15,160 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:44:15,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 20:44:15,161 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:15,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:15,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:15,186 INFO L354 Elim1Store]: treesize reduction 19, result has 29.6 percent of original size [2021-07-13 20:44:15,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 35 [2021-07-13 20:44:15,187 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:15,294 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 24 [2021-07-13 20:44:15,295 INFO L628 ElimStorePlain]: treesize reduction 153, result has 31.4 percent of original size [2021-07-13 20:44:15,296 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:44:15,296 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:929, output treesize:70 [2021-07-13 20:44:15,430 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 20:44:15,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641005341] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:15,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:15,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-07-13 20:44:15,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911874149] [2021-07-13 20:44:15,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:44:15,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:15,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:44:15,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:44:15,431 INFO L87 Difference]: Start difference. First operand 1905 states and 6453 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 20:44:16,910 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2021-07-13 20:44:17,303 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2021-07-13 20:44:17,466 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2021-07-13 20:44:18,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:18,096 INFO L93 Difference]: Finished difference Result 2960 states and 9357 transitions. [2021-07-13 20:44:18,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:44:18,096 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 20:44:18,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:18,101 INFO L225 Difference]: With dead ends: 2960 [2021-07-13 20:44:18,101 INFO L226 Difference]: Without dead ends: 2916 [2021-07-13 20:44:18,101 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 2544.8ms TimeCoverageRelationStatistics Valid=496, Invalid=1856, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:44:18,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2916 states. [2021-07-13 20:44:18,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2916 to 1933. [2021-07-13 20:44:18,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1933 states, 1932 states have (on average 3.391821946169772) internal successors, (6553), 1932 states have internal predecessors, (6553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:18,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1933 states to 1933 states and 6553 transitions. [2021-07-13 20:44:18,132 INFO L78 Accepts]: Start accepts. Automaton has 1933 states and 6553 transitions. Word has length 26 [2021-07-13 20:44:18,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:18,132 INFO L482 AbstractCegarLoop]: Abstraction has 1933 states and 6553 transitions. [2021-07-13 20:44:18,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 20:44:18,132 INFO L276 IsEmpty]: Start isEmpty. Operand 1933 states and 6553 transitions. [2021-07-13 20:44:18,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:44:18,135 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:18,135 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 20:44:18,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3160,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:18,350 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:18,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:18,351 INFO L82 PathProgramCache]: Analyzing trace with hash -680204241, now seen corresponding path program 51 times [2021-07-13 20:44:18,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:18,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687225748] [2021-07-13 20:44:18,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:18,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:18,576 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2021-07-13 20:44:18,696 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-07-13 20:44:18,967 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 20:44:18,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:18,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687225748] [2021-07-13 20:44:18,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687225748] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:18,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124680845] [2021-07-13 20:44:18,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:18,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:44:18,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:18,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 20:44:18,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:19,449 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2021-07-13 20:44:19,722 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 102 [2021-07-13 20:44:19,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:19,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:19,853 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:44:19,854 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 6 new quantified variables, introduced 4 case distinctions, treesize of input 53 treesize of output 1 [2021-07-13 20:44:19,854 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:19,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:19,873 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-07-13 20:44:19,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 58 treesize of output 46 [2021-07-13 20:44:19,874 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:20,050 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 86 [2021-07-13 20:44:20,050 INFO L628 ElimStorePlain]: treesize reduction 291, result has 43.3 percent of original size [2021-07-13 20:44:20,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:20,061 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-07-13 20:44:20,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 28 [2021-07-13 20:44:20,063 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:20,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:20,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:20,141 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-07-13 20:44:20,142 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 43 [2021-07-13 20:44:20,143 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:20,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:20,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:20,214 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-07-13 20:44:20,215 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 43 [2021-07-13 20:44:20,216 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:20,265 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:20,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:20,275 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-07-13 20:44:20,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 28 [2021-07-13 20:44:20,276 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:20,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:20,323 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:44:20,324 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 10 variables, input treesize:627, output treesize:83 [2021-07-13 20:44:20,398 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 20:44:20,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124680845] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:20,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:20,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:44:20,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417650091] [2021-07-13 20:44:20,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:44:20,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:20,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:44:20,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:44:20,399 INFO L87 Difference]: Start difference. First operand 1933 states and 6553 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 20:44:21,663 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2021-07-13 20:44:22,055 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-07-13 20:44:22,256 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2021-07-13 20:44:22,855 WARN L205 SmtUtils]: Spent 529.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 134 [2021-07-13 20:44:22,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:22,998 INFO L93 Difference]: Finished difference Result 2443 states and 8134 transitions. [2021-07-13 20:44:22,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:44:22,998 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 20:44:22,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:23,003 INFO L225 Difference]: With dead ends: 2443 [2021-07-13 20:44:23,003 INFO L226 Difference]: Without dead ends: 2428 [2021-07-13 20:44:23,004 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 3167.8ms TimeCoverageRelationStatistics Valid=229, Invalid=961, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:44:23,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2428 states. [2021-07-13 20:44:23,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2428 to 1948. [2021-07-13 20:44:23,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1948 states, 1947 states have (on average 3.389830508474576) internal successors, (6600), 1947 states have internal predecessors, (6600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:23,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1948 states to 1948 states and 6600 transitions. [2021-07-13 20:44:23,033 INFO L78 Accepts]: Start accepts. Automaton has 1948 states and 6600 transitions. Word has length 26 [2021-07-13 20:44:23,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:23,033 INFO L482 AbstractCegarLoop]: Abstraction has 1948 states and 6600 transitions. [2021-07-13 20:44:23,033 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 20:44:23,033 INFO L276 IsEmpty]: Start isEmpty. Operand 1948 states and 6600 transitions. [2021-07-13 20:44:23,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:44:23,036 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:23,036 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 20:44:23,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3192 [2021-07-13 20:44:23,251 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:23,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:23,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1997230275, now seen corresponding path program 52 times [2021-07-13 20:44:23,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:23,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148734722] [2021-07-13 20:44:23,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:23,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:23,619 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 20:44:23,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:23,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148734722] [2021-07-13 20:44:23,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148734722] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:23,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596493503] [2021-07-13 20:44:23,620 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 20:44:23,643 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:44:23,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:23,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:44:23,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:24,100 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-07-13 20:44:24,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:24,160 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:24,161 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 31 treesize of output 27 [2021-07-13 20:44:24,162 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:24,299 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2021-07-13 20:44:24,299 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:24,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:24,313 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:44:24,314 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 35 treesize of output 25 [2021-07-13 20:44:24,315 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:24,447 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-07-13 20:44:24,447 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:24,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:24,461 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:44:24,461 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 20 [2021-07-13 20:44:24,462 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:24,593 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2021-07-13 20:44:24,594 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:24,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:24,607 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:24,607 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 39 treesize of output 31 [2021-07-13 20:44:24,608 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:24,737 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-07-13 20:44:24,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:24,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:24,751 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:44:24,751 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 26 treesize of output 20 [2021-07-13 20:44:24,752 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:24,874 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-07-13 20:44:24,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:24,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:24,886 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:24,887 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 20:44:24,889 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:25,010 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-07-13 20:44:25,011 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:25,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:25,024 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:25,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 21 [2021-07-13 20:44:25,026 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:25,140 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-07-13 20:44:25,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:25,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:25,151 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:25,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-07-13 20:44:25,153 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:25,262 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-07-13 20:44:25,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:25,269 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 20:44:25,270 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:377, output treesize:216 [2021-07-13 20:44:25,411 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-07-13 20:44:25,489 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 20:44:25,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596493503] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:25,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:25,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:44:25,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138719075] [2021-07-13 20:44:25,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:44:25,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:25,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:44:25,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:44:25,490 INFO L87 Difference]: Start difference. First operand 1948 states and 6600 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 20:44:25,825 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-07-13 20:44:26,467 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2021-07-13 20:44:26,599 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 47 [2021-07-13 20:44:26,884 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2021-07-13 20:44:27,206 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-07-13 20:44:27,640 WARN L205 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 86 [2021-07-13 20:44:27,928 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2021-07-13 20:44:28,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:28,110 INFO L93 Difference]: Finished difference Result 2746 states and 9083 transitions. [2021-07-13 20:44:28,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:44:28,110 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 20:44:28,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:28,115 INFO L225 Difference]: With dead ends: 2746 [2021-07-13 20:44:28,116 INFO L226 Difference]: Without dead ends: 2731 [2021-07-13 20:44:28,116 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 2964.8ms TimeCoverageRelationStatistics Valid=275, Invalid=1057, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:44:28,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2731 states. [2021-07-13 20:44:28,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2731 to 1943. [2021-07-13 20:44:28,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1943 states, 1942 states have (on average 3.388774459320288) internal successors, (6581), 1942 states have internal predecessors, (6581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:28,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1943 states to 1943 states and 6581 transitions. [2021-07-13 20:44:28,147 INFO L78 Accepts]: Start accepts. Automaton has 1943 states and 6581 transitions. Word has length 26 [2021-07-13 20:44:28,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:28,147 INFO L482 AbstractCegarLoop]: Abstraction has 1943 states and 6581 transitions. [2021-07-13 20:44:28,147 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 20:44:28,147 INFO L276 IsEmpty]: Start isEmpty. Operand 1943 states and 6581 transitions. [2021-07-13 20:44:28,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:44:28,149 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:28,149 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, 1, 1] [2021-07-13 20:44:28,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3211,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:28,365 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:28,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:28,365 INFO L82 PathProgramCache]: Analyzing trace with hash 307287371, now seen corresponding path program 53 times [2021-07-13 20:44:28,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:28,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033746677] [2021-07-13 20:44:28,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:28,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:28,675 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2021-07-13 20:44:28,849 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2021-07-13 20:44:29,014 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 45 [2021-07-13 20:44:29,104 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 20:44:29,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:29,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033746677] [2021-07-13 20:44:29,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033746677] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:29,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23341130] [2021-07-13 20:44:29,104 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 20:44:29,132 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:44:29,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:29,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:44:29,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:29,581 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2021-07-13 20:44:29,667 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_446], 3=[v_prenex_445, v_prenex_447], 6=[A]} [2021-07-13 20:44:29,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:29,680 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:29,681 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 39 treesize of output 31 [2021-07-13 20:44:29,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:29,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:29,692 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-07-13 20:44:29,692 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 21 [2021-07-13 20:44:29,692 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:30,009 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 99 [2021-07-13 20:44:30,010 INFO L628 ElimStorePlain]: treesize reduction 3, result has 99.4 percent of original size [2021-07-13 20:44:30,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:30,027 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-07-13 20:44:30,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 42 [2021-07-13 20:44:30,029 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:30,045 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-07-13 20:44:30,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 49 [2021-07-13 20:44:30,047 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:30,325 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 92 [2021-07-13 20:44:30,326 INFO L628 ElimStorePlain]: treesize reduction 36, result has 91.4 percent of original size [2021-07-13 20:44:30,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:30,344 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-07-13 20:44:30,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 43 [2021-07-13 20:44:30,347 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:30,359 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-07-13 20:44:30,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 42 [2021-07-13 20:44:30,360 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:30,471 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-07-13 20:44:30,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:30,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:30,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:30,501 INFO L354 Elim1Store]: treesize reduction 21, result has 36.4 percent of original size [2021-07-13 20:44:30,502 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 6 new quantified variables, introduced 4 case distinctions, treesize of input 79 treesize of output 59 [2021-07-13 20:44:30,503 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:30,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:30,512 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-13 20:44:30,512 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 57 treesize of output 1 [2021-07-13 20:44:30,513 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:30,594 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:30,600 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-07-13 20:44:30,600 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:518, output treesize:190 [2021-07-13 20:44:30,804 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 20:44:30,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23341130] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:30,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:30,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 20:44:30,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108257757] [2021-07-13 20:44:30,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:44:30,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:30,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:44:30,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:44:30,804 INFO L87 Difference]: Start difference. First operand 1943 states and 6581 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 20:44:31,189 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 47 [2021-07-13 20:44:31,706 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2021-07-13 20:44:31,906 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 65 [2021-07-13 20:44:32,426 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2021-07-13 20:44:32,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:32,825 INFO L93 Difference]: Finished difference Result 2604 states and 8626 transitions. [2021-07-13 20:44:32,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:44:32,825 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 20:44:32,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:32,830 INFO L225 Difference]: With dead ends: 2604 [2021-07-13 20:44:32,830 INFO L226 Difference]: Without dead ends: 2579 [2021-07-13 20:44:32,831 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 2604.0ms TimeCoverageRelationStatistics Valid=221, Invalid=901, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:44:32,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2579 states. [2021-07-13 20:44:32,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2579 to 1939. [2021-07-13 20:44:32,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1939 states, 1938 states have (on average 3.392672858617131) internal successors, (6575), 1938 states have internal predecessors, (6575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:32,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1939 states to 1939 states and 6575 transitions. [2021-07-13 20:44:32,858 INFO L78 Accepts]: Start accepts. Automaton has 1939 states and 6575 transitions. Word has length 26 [2021-07-13 20:44:32,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:32,858 INFO L482 AbstractCegarLoop]: Abstraction has 1939 states and 6575 transitions. [2021-07-13 20:44:32,858 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 20:44:32,858 INFO L276 IsEmpty]: Start isEmpty. Operand 1939 states and 6575 transitions. [2021-07-13 20:44:32,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:44:32,860 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:32,860 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 20:44:33,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3225,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:33,077 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:33,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:33,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1089911327, now seen corresponding path program 61 times [2021-07-13 20:44:33,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:33,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358178909] [2021-07-13 20:44:33,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:33,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:33,429 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 20:44:33,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:33,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358178909] [2021-07-13 20:44:33,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358178909] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:33,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367509869] [2021-07-13 20:44:33,430 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 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 20:44:33,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:33,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:44:33,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:33,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:33,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:33,986 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-07-13 20:44:33,987 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 6 new quantified variables, introduced 4 case distinctions, treesize of input 114 treesize of output 1 [2021-07-13 20:44:33,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:33,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:33,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:34,016 INFO L354 Elim1Store]: treesize reduction 30, result has 18.9 percent of original size [2021-07-13 20:44:34,016 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 6 new quantified variables, introduced 4 case distinctions, treesize of input 95 treesize of output 63 [2021-07-13 20:44:34,017 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:34,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:34,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:34,034 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-07-13 20:44:34,034 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 6 new quantified variables, introduced 4 case distinctions, treesize of input 121 treesize of output 62 [2021-07-13 20:44:34,035 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:34,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:34,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:34,060 INFO L354 Elim1Store]: treesize reduction 30, result has 18.9 percent of original size [2021-07-13 20:44:34,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 116 treesize of output 65 [2021-07-13 20:44:34,062 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:34,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:34,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:34,079 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-07-13 20:44:34,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 162 treesize of output 1 [2021-07-13 20:44:34,080 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:34,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:34,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:34,097 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-07-13 20:44:34,097 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 6 new quantified variables, introduced 4 case distinctions, treesize of input 126 treesize of output 1 [2021-07-13 20:44:34,098 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:34,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:34,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:34,116 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-07-13 20:44:34,116 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 6 new quantified variables, introduced 4 case distinctions, treesize of input 167 treesize of output 1 [2021-07-13 20:44:34,117 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:34,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:34,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:34,142 INFO L354 Elim1Store]: treesize reduction 30, result has 18.9 percent of original size [2021-07-13 20:44:34,142 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 6 new quantified variables, introduced 4 case distinctions, treesize of input 162 treesize of output 74 [2021-07-13 20:44:34,144 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:44:34,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:34,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:34,162 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-07-13 20:44:34,162 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 6 new quantified variables, introduced 4 case distinctions, treesize of input 172 treesize of output 1 [2021-07-13 20:44:34,162 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:34,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:34,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:34,179 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-07-13 20:44:34,179 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 6 new quantified variables, introduced 4 case distinctions, treesize of input 109 treesize of output 1 [2021-07-13 20:44:34,180 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:34,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:34,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:34,199 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-07-13 20:44:34,199 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 6 new quantified variables, introduced 4 case distinctions, treesize of input 100 treesize of output 1 [2021-07-13 20:44:34,200 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:34,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:34,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:34,226 INFO L354 Elim1Store]: treesize reduction 30, result has 18.9 percent of original size [2021-07-13 20:44:34,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 119 treesize of output 69 [2021-07-13 20:44:34,228 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:34,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:34,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:34,246 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-07-13 20:44:34,246 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 6 new quantified variables, introduced 4 case distinctions, treesize of input 109 treesize of output 1 [2021-07-13 20:44:34,247 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:34,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:34,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:34,264 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-07-13 20:44:34,264 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 6 new quantified variables, introduced 4 case distinctions, treesize of input 116 treesize of output 1 [2021-07-13 20:44:34,265 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:34,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:34,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:34,280 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-07-13 20:44:34,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 90 treesize of output 1 [2021-07-13 20:44:34,281 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:34,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:34,287 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-07-13 20:44:34,287 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 90 treesize of output 54 [2021-07-13 20:44:34,288 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:34,331 INFO L628 ElimStorePlain]: treesize reduction 66, result has 37.1 percent of original size [2021-07-13 20:44:34,332 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 20:44:34,332 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:2101, output treesize:27 [2021-07-13 20:44:34,366 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 20:44:34,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367509869] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:34,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:34,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-07-13 20:44:34,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268312530] [2021-07-13 20:44:34,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:44:34,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:34,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:44:34,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:44:34,367 INFO L87 Difference]: Start difference. First operand 1939 states and 6575 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 20:44:35,155 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 70 [2021-07-13 20:44:35,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:35,957 INFO L93 Difference]: Finished difference Result 2711 states and 8858 transitions. [2021-07-13 20:44:35,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:44:35,958 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 20:44:35,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:35,962 INFO L225 Difference]: With dead ends: 2711 [2021-07-13 20:44:35,962 INFO L226 Difference]: Without dead ends: 2674 [2021-07-13 20:44:35,963 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 1717.4ms TimeCoverageRelationStatistics Valid=307, Invalid=1253, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:44:35,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2674 states. [2021-07-13 20:44:35,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2674 to 1951. [2021-07-13 20:44:35,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1951 states, 1950 states have (on average 3.3897435897435897) internal successors, (6610), 1950 states have internal predecessors, (6610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:35,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1951 states to 1951 states and 6610 transitions. [2021-07-13 20:44:35,991 INFO L78 Accepts]: Start accepts. Automaton has 1951 states and 6610 transitions. Word has length 26 [2021-07-13 20:44:35,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:35,991 INFO L482 AbstractCegarLoop]: Abstraction has 1951 states and 6610 transitions. [2021-07-13 20:44:35,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 20:44:35,992 INFO L276 IsEmpty]: Start isEmpty. Operand 1951 states and 6610 transitions. [2021-07-13 20:44:35,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:44:35,994 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:35,994 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 20:44:36,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3256,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:36,209 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:36,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:36,209 INFO L82 PathProgramCache]: Analyzing trace with hash -164417461, now seen corresponding path program 62 times [2021-07-13 20:44:36,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:36,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582956376] [2021-07-13 20:44:36,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:36,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:36,548 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 20:44:36,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:36,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582956376] [2021-07-13 20:44:36,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582956376] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:36,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599923897] [2021-07-13 20:44:36,548 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 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 20:44:36,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:44:36,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:36,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:44:36,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:36,856 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-07-13 20:44:36,889 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_448, v_prenex_452], 6=[A, v_prenex_450]} [2021-07-13 20:44:36,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:36,905 INFO L354 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2021-07-13 20:44:36,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 41 [2021-07-13 20:44:36,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:36,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:36,914 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-07-13 20:44:36,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 1 [2021-07-13 20:44:36,915 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:37,050 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 78 [2021-07-13 20:44:37,050 INFO L628 ElimStorePlain]: treesize reduction 303, result has 45.9 percent of original size [2021-07-13 20:44:37,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:37,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2021-07-13 20:44:37,056 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:37,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:37,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:37,120 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-07-13 20:44:37,120 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 101 treesize of output 52 [2021-07-13 20:44:37,122 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:44:37,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:37,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:37,178 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-07-13 20:44:37,178 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 65 treesize of output 47 [2021-07-13 20:44:37,179 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:37,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:37,215 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 20:44:37,216 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:691, output treesize:55 [2021-07-13 20:44:37,291 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 20:44:37,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599923897] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:37,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:37,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-13 20:44:37,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113733006] [2021-07-13 20:44:37,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:44:37,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:37,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:44:37,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:44:37,292 INFO L87 Difference]: Start difference. First operand 1951 states and 6610 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 20:44:38,817 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-07-13 20:44:38,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:38,977 INFO L93 Difference]: Finished difference Result 2506 states and 8326 transitions. [2021-07-13 20:44:38,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:44:38,978 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 20:44:38,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:38,982 INFO L225 Difference]: With dead ends: 2506 [2021-07-13 20:44:38,982 INFO L226 Difference]: Without dead ends: 2491 [2021-07-13 20:44:38,982 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 1830.3ms TimeCoverageRelationStatistics Valid=324, Invalid=1236, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:44:38,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2491 states. [2021-07-13 20:44:39,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2491 to 1951. [2021-07-13 20:44:39,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1951 states, 1950 states have (on average 3.3897435897435897) internal successors, (6610), 1950 states have internal predecessors, (6610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:39,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1951 states to 1951 states and 6610 transitions. [2021-07-13 20:44:39,008 INFO L78 Accepts]: Start accepts. Automaton has 1951 states and 6610 transitions. Word has length 26 [2021-07-13 20:44:39,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:39,008 INFO L482 AbstractCegarLoop]: Abstraction has 1951 states and 6610 transitions. [2021-07-13 20:44:39,008 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 20:44:39,008 INFO L276 IsEmpty]: Start isEmpty. Operand 1951 states and 6610 transitions. [2021-07-13 20:44:39,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:44:39,011 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:39,011 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 20:44:39,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3314,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:39,225 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:39,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:39,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1406408139, now seen corresponding path program 63 times [2021-07-13 20:44:39,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:39,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509417947] [2021-07-13 20:44:39,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:39,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:39,529 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 20:44:39,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:39,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509417947] [2021-07-13 20:44:39,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509417947] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:39,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024678204] [2021-07-13 20:44:39,530 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 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 20:44:39,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:44:39,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:39,565 WARN L261 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-13 20:44:39,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:39,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:39,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:39,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:39,853 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-07-13 20:44:39,853 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 65 treesize of output 49 [2021-07-13 20:44:39,855 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:39,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:39,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:39,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:39,882 INFO L354 Elim1Store]: treesize reduction 12, result has 61.3 percent of original size [2021-07-13 20:44:39,883 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 53 treesize of output 47 [2021-07-13 20:44:39,885 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:39,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:39,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:39,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:39,901 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-13 20:44:39,901 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 46 treesize of output 1 [2021-07-13 20:44:39,901 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:39,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:39,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:39,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:39,923 INFO L354 Elim1Store]: treesize reduction 24, result has 22.6 percent of original size [2021-07-13 20:44:39,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 29 [2021-07-13 20:44:39,924 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:39,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:39,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:39,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:39,950 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-07-13 20:44:39,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 49 [2021-07-13 20:44:39,952 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:39,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:39,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:39,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:39,967 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-13 20:44:39,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 26 [2021-07-13 20:44:39,968 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:39,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:39,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:39,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:39,984 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-13 20:44:39,984 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 48 treesize of output 1 [2021-07-13 20:44:39,985 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:39,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:39,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:39,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:40,009 INFO L354 Elim1Store]: treesize reduction 24, result has 22.6 percent of original size [2021-07-13 20:44:40,009 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 47 [2021-07-13 20:44:40,010 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:40,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:40,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:40,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:40,033 INFO L354 Elim1Store]: treesize reduction 24, result has 22.6 percent of original size [2021-07-13 20:44:40,033 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 55 treesize of output 35 [2021-07-13 20:44:40,034 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:40,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:40,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:40,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:40,050 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-13 20:44:40,050 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 48 treesize of output 1 [2021-07-13 20:44:40,051 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:40,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:40,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:40,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:40,066 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-13 20:44:40,066 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 53 treesize of output 1 [2021-07-13 20:44:40,067 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:40,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:40,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:40,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:40,083 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-13 20:44:40,083 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 58 treesize of output 1 [2021-07-13 20:44:40,084 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:40,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:40,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:40,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:40,100 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-13 20:44:40,100 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 63 treesize of output 1 [2021-07-13 20:44:40,101 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:40,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:40,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:40,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:40,116 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-13 20:44:40,116 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 58 treesize of output 1 [2021-07-13 20:44:40,117 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:40,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:40,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:40,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:40,130 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-13 20:44:40,131 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 51 treesize of output 29 [2021-07-13 20:44:40,132 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:40,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:40,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:40,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:40,141 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-13 20:44:40,141 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 63 treesize of output 1 [2021-07-13 20:44:40,142 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:40,261 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 34 [2021-07-13 20:44:40,261 INFO L628 ElimStorePlain]: treesize reduction 148, result has 49.5 percent of original size [2021-07-13 20:44:40,263 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 20:44:40,263 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:1321, output treesize:145 [2021-07-13 20:44:40,520 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 20:44:40,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024678204] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:40,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:40,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-07-13 20:44:40,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798310407] [2021-07-13 20:44:40,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:44:40,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:40,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:44:40,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:44:40,521 INFO L87 Difference]: Start difference. First operand 1951 states and 6610 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 20:44:41,185 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2021-07-13 20:44:41,853 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2021-07-13 20:44:41,994 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2021-07-13 20:44:42,333 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 67 [2021-07-13 20:44:42,932 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-07-13 20:44:43,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:43,270 INFO L93 Difference]: Finished difference Result 2931 states and 9407 transitions. [2021-07-13 20:44:43,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:44:43,270 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 20:44:43,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:43,275 INFO L225 Difference]: With dead ends: 2931 [2021-07-13 20:44:43,275 INFO L226 Difference]: Without dead ends: 2858 [2021-07-13 20:44:43,275 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 2730.7ms TimeCoverageRelationStatistics Valid=461, Invalid=1795, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:44:43,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2858 states. [2021-07-13 20:44:43,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2858 to 2137. [2021-07-13 20:44:43,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2137 states, 2136 states have (on average 3.387172284644195) internal successors, (7235), 2136 states have internal predecessors, (7235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:43,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2137 states to 2137 states and 7235 transitions. [2021-07-13 20:44:43,307 INFO L78 Accepts]: Start accepts. Automaton has 2137 states and 7235 transitions. Word has length 26 [2021-07-13 20:44:43,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:43,307 INFO L482 AbstractCegarLoop]: Abstraction has 2137 states and 7235 transitions. [2021-07-13 20:44:43,307 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 20:44:43,307 INFO L276 IsEmpty]: Start isEmpty. Operand 2137 states and 7235 transitions. [2021-07-13 20:44:43,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:44:43,309 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:43,309 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 20:44:43,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3326,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:43,525 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:43,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:43,525 INFO L82 PathProgramCache]: Analyzing trace with hash -958901773, now seen corresponding path program 54 times [2021-07-13 20:44:43,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:43,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204802553] [2021-07-13 20:44:43,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:43,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:43,957 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2021-07-13 20:44:44,127 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 20:44:44,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:44,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204802553] [2021-07-13 20:44:44,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204802553] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:44,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452313237] [2021-07-13 20:44:44,127 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 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 20:44:44,153 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:44:44,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:44,154 WARN L261 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-13 20:44:44,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:44,641 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-07-13 20:44:44,874 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-07-13 20:44:44,996 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_464, v_prenex_466, v_prenex_468], 3=[A, v_prenex_462, v_prenex_463, v_prenex_465, v_prenex_467]} [2021-07-13 20:44:45,020 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:44:45,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 35 treesize of output 33 [2021-07-13 20:44:45,021 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:45,184 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2021-07-13 20:44:45,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:45,209 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:44:45,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 20:44:45,212 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:45,376 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2021-07-13 20:44:45,376 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:45,418 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:45,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 20:44:45,421 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:45,595 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2021-07-13 20:44:45,595 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:45,616 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-07-13 20:44:45,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 53 [2021-07-13 20:44:45,618 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:45,818 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2021-07-13 20:44:45,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:45,842 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-07-13 20:44:45,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 95 treesize of output 64 [2021-07-13 20:44:45,844 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:46,009 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2021-07-13 20:44:46,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:46,032 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-07-13 20:44:46,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 60 [2021-07-13 20:44:46,034 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:46,194 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-07-13 20:44:46,195 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:46,219 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-07-13 20:44:46,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 100 treesize of output 71 [2021-07-13 20:44:46,222 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:46,387 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-07-13 20:44:46,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:46,408 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-07-13 20:44:46,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 57 [2021-07-13 20:44:46,411 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:46,560 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-07-13 20:44:46,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:46,575 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 20:44:46,575 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:606, output treesize:480 [2021-07-13 20:44:46,797 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 37 [2021-07-13 20:44:46,892 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 20:44:46,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452313237] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:46,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:46,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-07-13 20:44:46,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324525250] [2021-07-13 20:44:46,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:44:46,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:46,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:44:46,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:44:46,892 INFO L87 Difference]: Start difference. First operand 2137 states and 7235 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 20:44:47,561 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 62 [2021-07-13 20:44:47,706 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2021-07-13 20:44:48,353 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2021-07-13 20:44:48,802 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 84 [2021-07-13 20:44:49,114 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-07-13 20:44:50,019 WARN L205 SmtUtils]: Spent 719.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 103 [2021-07-13 20:44:50,546 WARN L205 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 129 [2021-07-13 20:44:51,540 WARN L205 SmtUtils]: Spent 673.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 123 [2021-07-13 20:44:52,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:52,043 INFO L93 Difference]: Finished difference Result 2788 states and 9199 transitions. [2021-07-13 20:44:52,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:44:52,043 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 20:44:52,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:52,048 INFO L225 Difference]: With dead ends: 2788 [2021-07-13 20:44:52,048 INFO L226 Difference]: Without dead ends: 2773 [2021-07-13 20:44:52,048 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 5174.3ms TimeCoverageRelationStatistics Valid=197, Invalid=1209, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:44:52,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2773 states. [2021-07-13 20:44:52,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2773 to 2145. [2021-07-13 20:44:52,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2145 states, 2144 states have (on average 3.3857276119402986) internal successors, (7259), 2144 states have internal predecessors, (7259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:52,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2145 states to 2145 states and 7259 transitions. [2021-07-13 20:44:52,078 INFO L78 Accepts]: Start accepts. Automaton has 2145 states and 7259 transitions. Word has length 26 [2021-07-13 20:44:52,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:52,078 INFO L482 AbstractCegarLoop]: Abstraction has 2145 states and 7259 transitions. [2021-07-13 20:44:52,079 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 20:44:52,079 INFO L276 IsEmpty]: Start isEmpty. Operand 2145 states and 7259 transitions. [2021-07-13 20:44:52,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:44:52,081 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:52,081 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 20:44:52,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3350 [2021-07-13 20:44:52,297 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:52,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:52,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1718532743, now seen corresponding path program 55 times [2021-07-13 20:44:52,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:52,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884136197] [2021-07-13 20:44:52,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:52,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:52,778 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 20:44:52,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:52,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884136197] [2021-07-13 20:44:52,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884136197] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:52,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581980140] [2021-07-13 20:44:52,779 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 20:44:52,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:52,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:44:52,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:53,245 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-07-13 20:44:53,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:53,305 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:44:53,305 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 35 treesize of output 25 [2021-07-13 20:44:53,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:53,424 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-07-13 20:44:53,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:53,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:53,436 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:53,436 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 44 treesize of output 34 [2021-07-13 20:44:53,437 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:53,558 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2021-07-13 20:44:53,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:53,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:53,570 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:53,570 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 27 [2021-07-13 20:44:53,571 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:53,692 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-07-13 20:44:53,693 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:53,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:53,705 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:53,705 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 39 treesize of output 31 [2021-07-13 20:44:53,706 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:53,851 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-07-13 20:44:53,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:53,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:53,862 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:44:53,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 20 [2021-07-13 20:44:53,863 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:53,988 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-07-13 20:44:53,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:53,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:54,001 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:54,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 20:44:54,003 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:54,125 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-07-13 20:44:54,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:54,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:54,137 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:44:54,137 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 20 [2021-07-13 20:44:54,139 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:54,255 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-07-13 20:44:54,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:54,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:54,266 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:54,266 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 21 [2021-07-13 20:44:54,268 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:54,379 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-07-13 20:44:54,379 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:44:54,386 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 20:44:54,387 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:377, output treesize:216 [2021-07-13 20:44:54,521 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2021-07-13 20:44:54,598 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 20:44:54,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581980140] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:54,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:54,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:44:54,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529628083] [2021-07-13 20:44:54,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:44:54,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:54,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:44:54,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:44:54,599 INFO L87 Difference]: Start difference. First operand 2145 states and 7259 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 20:44:54,933 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2021-07-13 20:44:55,195 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 58 [2021-07-13 20:44:55,799 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-07-13 20:44:56,189 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 79 [2021-07-13 20:44:56,443 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-07-13 20:44:56,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:56,668 INFO L93 Difference]: Finished difference Result 2992 states and 9916 transitions. [2021-07-13 20:44:56,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:44:56,668 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 20:44:56,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:56,674 INFO L225 Difference]: With dead ends: 2992 [2021-07-13 20:44:56,674 INFO L226 Difference]: Without dead ends: 2977 [2021-07-13 20:44:56,674 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 2451.7ms TimeCoverageRelationStatistics Valid=217, Invalid=839, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:44:56,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2977 states. [2021-07-13 20:44:56,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2977 to 2139. [2021-07-13 20:44:56,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2139 states, 2138 states have (on average 3.3835360149672593) internal successors, (7234), 2138 states have internal predecessors, (7234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:56,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2139 states to 2139 states and 7234 transitions. [2021-07-13 20:44:56,711 INFO L78 Accepts]: Start accepts. Automaton has 2139 states and 7234 transitions. Word has length 26 [2021-07-13 20:44:56,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:56,711 INFO L482 AbstractCegarLoop]: Abstraction has 2139 states and 7234 transitions. [2021-07-13 20:44:56,711 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 20:44:56,711 INFO L276 IsEmpty]: Start isEmpty. Operand 2139 states and 7234 transitions. [2021-07-13 20:44:56,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:44:56,714 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:56,714 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 20:44:56,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3372 [2021-07-13 20:44:56,930 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:56,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:56,931 INFO L82 PathProgramCache]: Analyzing trace with hash 28589839, now seen corresponding path program 56 times [2021-07-13 20:44:56,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:56,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429576134] [2021-07-13 20:44:56,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:56,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:57,310 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-07-13 20:44:57,483 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 20:44:57,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:57,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429576134] [2021-07-13 20:44:57,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429576134] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:57,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857251526] [2021-07-13 20:44:57,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:44:57,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:44:57,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:57,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:44:57,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:57,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:57,728 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-07-13 20:44:57,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 57 [2021-07-13 20:44:57,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:57,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:57,746 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-07-13 20:44:57,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 43 [2021-07-13 20:44:57,747 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:57,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:57,762 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-07-13 20:44:57,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 46 [2021-07-13 20:44:57,764 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:57,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:57,775 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:44:57,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 93 treesize of output 54 [2021-07-13 20:44:57,776 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:57,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:57,794 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-07-13 20:44:57,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 106 treesize of output 65 [2021-07-13 20:44:57,796 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:57,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:57,812 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-07-13 20:44:57,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 53 [2021-07-13 20:44:57,814 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:57,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:57,826 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:44:57,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 81 treesize of output 51 [2021-07-13 20:44:57,827 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:57,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:57,845 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-07-13 20:44:57,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 50 [2021-07-13 20:44:57,847 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:57,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:57,859 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:44:57,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 39 [2021-07-13 20:44:57,861 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:57,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:57,872 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:44:57,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 81 treesize of output 51 [2021-07-13 20:44:57,873 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:57,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:57,885 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:44:57,885 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 5 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 47 [2021-07-13 20:44:57,886 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:57,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:57,897 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:44:57,897 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 5 new quantified variables, introduced 2 case distinctions, treesize of input 104 treesize of output 55 [2021-07-13 20:44:57,897 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:57,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:57,908 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:44:57,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 47 [2021-07-13 20:44:57,909 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:57,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:57,920 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:44:57,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 104 treesize of output 55 [2021-07-13 20:44:57,921 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:57,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:57,939 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-07-13 20:44:57,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 106 treesize of output 65 [2021-07-13 20:44:57,941 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:57,946 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-07-13 20:44:57,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 54 [2021-07-13 20:44:57,947 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:58,056 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2021-07-13 20:44:58,056 INFO L628 ElimStorePlain]: treesize reduction 123, result has 39.4 percent of original size [2021-07-13 20:44:58,057 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:44:58,057 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:1445, output treesize:80 [2021-07-13 20:44:58,185 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 20:44:58,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857251526] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:58,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:58,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-13 20:44:58,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391402398] [2021-07-13 20:44:58,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:44:58,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:58,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:44:58,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:44:58,186 INFO L87 Difference]: Start difference. First operand 2139 states and 7234 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 20:44:58,494 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2021-07-13 20:44:59,171 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 60 [2021-07-13 20:44:59,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:59,682 INFO L93 Difference]: Finished difference Result 2826 states and 9360 transitions. [2021-07-13 20:44:59,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:44:59,682 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 20:44:59,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:59,687 INFO L225 Difference]: With dead ends: 2826 [2021-07-13 20:44:59,687 INFO L226 Difference]: Without dead ends: 2801 [2021-07-13 20:44:59,687 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1768.5ms TimeCoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:44:59,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2801 states. [2021-07-13 20:44:59,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2801 to 2126. [2021-07-13 20:44:59,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2126 states, 2125 states have (on average 3.3835294117647057) internal successors, (7190), 2125 states have internal predecessors, (7190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:59,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2126 states to 2126 states and 7190 transitions. [2021-07-13 20:44:59,717 INFO L78 Accepts]: Start accepts. Automaton has 2126 states and 7190 transitions. Word has length 26 [2021-07-13 20:44:59,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:59,717 INFO L482 AbstractCegarLoop]: Abstraction has 2126 states and 7190 transitions. [2021-07-13 20:44:59,717 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 20:44:59,717 INFO L276 IsEmpty]: Start isEmpty. Operand 2126 states and 7190 transitions. [2021-07-13 20:44:59,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:44:59,720 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:59,720 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 20:44:59,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3386 [2021-07-13 20:44:59,926 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:59,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:59,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1781836725, now seen corresponding path program 57 times [2021-07-13 20:44:59,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:59,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426875901] [2021-07-13 20:44:59,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:59,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:00,343 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 20:45:00,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:00,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426875901] [2021-07-13 20:45:00,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426875901] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:00,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530218464] [2021-07-13 20:45:00,343 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 20:45:00,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:45:00,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:00,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:45:00,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:00,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:00,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:00,774 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:45:00,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 31 [2021-07-13 20:45:00,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:45:00,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:00,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:00,786 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-13 20:45:00,786 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 40 treesize of output 30 [2021-07-13 20:45:00,787 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:45:01,032 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 96 [2021-07-13 20:45:01,032 INFO L628 ElimStorePlain]: treesize reduction 12, result has 97.7 percent of original size [2021-07-13 20:45:01,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:01,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:01,046 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-13 20:45:01,047 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 34 [2021-07-13 20:45:01,048 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:45:01,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:01,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:01,059 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:45:01,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 41 [2021-07-13 20:45:01,060 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:45:01,306 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2021-07-13 20:45:01,307 INFO L628 ElimStorePlain]: treesize reduction 32, result has 92.9 percent of original size [2021-07-13 20:45:01,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:01,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:01,320 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:45:01,320 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 76 treesize of output 56 [2021-07-13 20:45:01,321 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:45:01,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:01,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:01,330 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:45:01,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 1 [2021-07-13 20:45:01,330 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:45:01,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:45:01,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:01,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:01,431 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:45:01,432 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 51 treesize of output 41 [2021-07-13 20:45:01,434 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:45:01,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:01,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:01,443 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:45:01,443 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 67 treesize of output 49 [2021-07-13 20:45:01,445 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:45:01,663 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2021-07-13 20:45:01,663 INFO L628 ElimStorePlain]: treesize reduction 10, result has 95.5 percent of original size [2021-07-13 20:45:01,669 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-07-13 20:45:01,669 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:559, output treesize:189 [2021-07-13 20:45:01,831 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 20:45:01,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530218464] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:01,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:01,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:45:01,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071628162] [2021-07-13 20:45:01,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:45:01,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:01,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:45:01,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:45:01,832 INFO L87 Difference]: Start difference. First operand 2126 states and 7190 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 20:45:02,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:02,820 INFO L93 Difference]: Finished difference Result 2742 states and 9142 transitions. [2021-07-13 20:45:02,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:45:02,820 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 20:45:02,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:02,825 INFO L225 Difference]: With dead ends: 2742 [2021-07-13 20:45:02,825 INFO L226 Difference]: Without dead ends: 2727 [2021-07-13 20:45:02,826 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1216.3ms TimeCoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:45:02,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2727 states. [2021-07-13 20:45:02,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2727 to 2126. [2021-07-13 20:45:02,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2126 states, 2125 states have (on average 3.3835294117647057) internal successors, (7190), 2125 states have internal predecessors, (7190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:02,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2126 states to 2126 states and 7190 transitions. [2021-07-13 20:45:02,856 INFO L78 Accepts]: Start accepts. Automaton has 2126 states and 7190 transitions. Word has length 26 [2021-07-13 20:45:02,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:02,856 INFO L482 AbstractCegarLoop]: Abstraction has 2126 states and 7190 transitions. [2021-07-13 20:45:02,856 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 20:45:02,856 INFO L276 IsEmpty]: Start isEmpty. Operand 2126 states and 7190 transitions. [2021-07-13 20:45:02,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:45:02,859 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:02,859 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 20:45:03,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3394,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:03,075 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:03,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:03,075 INFO L82 PathProgramCache]: Analyzing trace with hash -529489601, now seen corresponding path program 64 times [2021-07-13 20:45:03,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:03,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979610861] [2021-07-13 20:45:03,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:03,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:03,429 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 20:45:03,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:03,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979610861] [2021-07-13 20:45:03,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979610861] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:03,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506677237] [2021-07-13 20:45:03,429 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 20:45:03,455 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:45:03,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:03,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:45:03,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:03,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:03,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:03,838 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-07-13 20:45:03,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 85 treesize of output 1 [2021-07-13 20:45:03,839 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:45:03,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:03,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:03,857 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-07-13 20:45:03,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 124 treesize of output 1 [2021-07-13 20:45:03,858 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:45:03,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:03,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:03,885 INFO L354 Elim1Store]: treesize reduction 30, result has 18.9 percent of original size [2021-07-13 20:45:03,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 83 treesize of output 50 [2021-07-13 20:45:03,887 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:45:03,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:03,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:03,903 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-07-13 20:45:03,904 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 6 new quantified variables, introduced 4 case distinctions, treesize of input 66 treesize of output 42 [2021-07-13 20:45:03,905 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:45:03,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:03,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:03,922 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-07-13 20:45:03,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 85 treesize of output 1 [2021-07-13 20:45:03,923 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:45:03,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:03,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:03,940 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-07-13 20:45:03,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 83 treesize of output 1 [2021-07-13 20:45:03,941 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:45:03,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:03,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:03,968 INFO L354 Elim1Store]: treesize reduction 30, result has 18.9 percent of original size [2021-07-13 20:45:03,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 95 treesize of output 57 [2021-07-13 20:45:03,970 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:45:03,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:03,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:03,988 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-07-13 20:45:03,988 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 6 new quantified variables, introduced 4 case distinctions, treesize of input 119 treesize of output 1 [2021-07-13 20:45:03,989 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:45:03,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:03,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:04,008 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-07-13 20:45:04,008 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 6 new quantified variables, introduced 4 case distinctions, treesize of input 76 treesize of output 1 [2021-07-13 20:45:04,009 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:45:04,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:04,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:04,027 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-07-13 20:45:04,027 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 6 new quantified variables, introduced 4 case distinctions, treesize of input 88 treesize of output 47 [2021-07-13 20:45:04,028 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:45:04,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:04,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:04,047 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-07-13 20:45:04,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 71 treesize of output 45 [2021-07-13 20:45:04,049 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:45:04,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:04,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:04,067 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-07-13 20:45:04,067 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 6 new quantified variables, introduced 4 case distinctions, treesize of input 129 treesize of output 1 [2021-07-13 20:45:04,068 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:45:04,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:04,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:04,085 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-07-13 20:45:04,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 66 treesize of output 1 [2021-07-13 20:45:04,086 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:45:04,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:04,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:04,104 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-07-13 20:45:04,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 93 treesize of output 1 [2021-07-13 20:45:04,105 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:45:04,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:04,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:04,122 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-07-13 20:45:04,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 90 treesize of output 1 [2021-07-13 20:45:04,123 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:45:04,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:04,138 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-07-13 20:45:04,139 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 119 treesize of output 55 [2021-07-13 20:45:04,140 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:45:04,187 INFO L628 ElimStorePlain]: treesize reduction 74, result has 35.7 percent of original size [2021-07-13 20:45:04,188 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 20:45:04,188 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:1653, output treesize:29 [2021-07-13 20:45:04,232 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 20:45:04,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506677237] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:04,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:04,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-13 20:45:04,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012726436] [2021-07-13 20:45:04,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:45:04,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:04,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:45:04,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:45:04,233 INFO L87 Difference]: Start difference. First operand 2126 states and 7190 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 20:45:05,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:05,460 INFO L93 Difference]: Finished difference Result 2821 states and 9363 transitions. [2021-07-13 20:45:05,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:45:05,461 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 20:45:05,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:05,465 INFO L225 Difference]: With dead ends: 2821 [2021-07-13 20:45:05,465 INFO L226 Difference]: Without dead ends: 2799 [2021-07-13 20:45:05,466 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 1380.3ms TimeCoverageRelationStatistics Valid=289, Invalid=1043, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:45:05,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2799 states. [2021-07-13 20:45:05,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2799 to 2120. [2021-07-13 20:45:05,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2120 states, 2119 states have (on average 3.382255781028787) internal successors, (7167), 2119 states have internal predecessors, (7167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:05,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 7167 transitions. [2021-07-13 20:45:05,497 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 7167 transitions. Word has length 26 [2021-07-13 20:45:05,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:05,498 INFO L482 AbstractCegarLoop]: Abstraction has 2120 states and 7167 transitions. [2021-07-13 20:45:05,498 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 20:45:05,498 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 7167 transitions. [2021-07-13 20:45:05,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:45:05,500 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:05,500 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 20:45:05,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3413,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:05,718 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:05,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:05,718 INFO L82 PathProgramCache]: Analyzing trace with hash -815414513, now seen corresponding path program 65 times [2021-07-13 20:45:05,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:05,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821676670] [2021-07-13 20:45:05,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:05,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:06,034 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 20:45:06,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:06,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821676670] [2021-07-13 20:45:06,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821676670] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:06,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573277021] [2021-07-13 20:45:06,035 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 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 20:45:06,061 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:45:06,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:06,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:45:06,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:06,371 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2021-07-13 20:45:06,422 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_493], 5=[v_prenex_491, v_prenex_495]} [2021-07-13 20:45:06,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:06,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:06,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:45:06,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:45:06,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 39 treesize of output 18 [2021-07-13 20:45:06,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:45:06,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:06,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:06,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:45:06,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 18 [2021-07-13 20:45:06,438 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:45:06,595 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2021-07-13 20:45:06,595 INFO L628 ElimStorePlain]: treesize reduction 195, result has 44.9 percent of original size [2021-07-13 20:45:06,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:06,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:45:06,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 24 treesize of output 12 [2021-07-13 20:45:06,600 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:45:06,644 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:45:06,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:06,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:45:06,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:45:06,649 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 14 [2021-07-13 20:45:06,650 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:45:06,690 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:45:06,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:06,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:06,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:45:06,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:45:06,695 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 48 treesize of output 24 [2021-07-13 20:45:06,696 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:45:06,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:45:06,733 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 20:45:06,733 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:429, output treesize:55 [2021-07-13 20:45:06,777 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 20:45:06,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573277021] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:06,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:06,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-07-13 20:45:06,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121429613] [2021-07-13 20:45:06,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:45:06,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:06,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:45:06,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:45:06,778 INFO L87 Difference]: Start difference. First operand 2120 states and 7167 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 20:45:07,994 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-07-13 20:45:08,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:08,098 INFO L93 Difference]: Finished difference Result 2661 states and 8818 transitions. [2021-07-13 20:45:08,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:45:08,098 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 20:45:08,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:08,103 INFO L225 Difference]: With dead ends: 2661 [2021-07-13 20:45:08,103 INFO L226 Difference]: Without dead ends: 2642 [2021-07-13 20:45:08,103 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 1465.8ms TimeCoverageRelationStatistics Valid=248, Invalid=942, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:45:08,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2642 states. [2021-07-13 20:45:08,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2642 to 2120. [2021-07-13 20:45:08,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2120 states, 2119 states have (on average 3.381311939594148) internal successors, (7165), 2119 states have internal predecessors, (7165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:08,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 7165 transitions. [2021-07-13 20:45:08,134 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 7165 transitions. Word has length 26 [2021-07-13 20:45:08,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:08,134 INFO L482 AbstractCegarLoop]: Abstraction has 2120 states and 7165 transitions. [2021-07-13 20:45:08,134 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 20:45:08,134 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 7165 transitions. [2021-07-13 20:45:08,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:45:08,137 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:08,137 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 20:45:08,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3471,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:08,338 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:08,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:08,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1107808399, now seen corresponding path program 66 times [2021-07-13 20:45:08,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:08,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053984486] [2021-07-13 20:45:08,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:08,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:08,642 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 20:45:08,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:08,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053984486] [2021-07-13 20:45:08,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053984486] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:08,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742974701] [2021-07-13 20:45:08,642 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 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 20:45:08,668 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:45:08,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:08,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:45:08,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:08,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:08,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:08,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:08,948 INFO L354 Elim1Store]: treesize reduction 4, result has 87.1 percent of original size [2021-07-13 20:45:08,948 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 51 treesize of output 55 [2021-07-13 20:45:08,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:45:08,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:08,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:08,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:08,984 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-07-13 20:45:08,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 43 [2021-07-13 20:45:08,987 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:45:08,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:08,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:08,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:09,014 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-07-13 20:45:09,014 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 48 treesize of output 40 [2021-07-13 20:45:09,015 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:45:09,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:09,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:09,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:09,042 INFO L354 Elim1Store]: treesize reduction 20, result has 35.5 percent of original size [2021-07-13 20:45:09,042 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 58 treesize of output 42 [2021-07-13 20:45:09,044 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:45:09,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:09,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:09,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:09,060 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-13 20:45:09,060 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 23 [2021-07-13 20:45:09,062 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:45:09,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:09,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:09,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:09,079 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-13 20:45:09,079 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 63 treesize of output 1 [2021-07-13 20:45:09,080 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:45:09,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:09,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:09,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:09,115 INFO L354 Elim1Store]: treesize reduction 4, result has 87.1 percent of original size [2021-07-13 20:45:09,115 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 55 treesize of output 55 [2021-07-13 20:45:09,118 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:45:09,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:09,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:09,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:09,136 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-13 20:45:09,136 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 46 treesize of output 26 [2021-07-13 20:45:09,137 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:45:09,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:09,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:09,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:09,155 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-13 20:45:09,155 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 46 treesize of output 26 [2021-07-13 20:45:09,156 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:45:09,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:09,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:09,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:09,182 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-07-13 20:45:09,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 42 [2021-07-13 20:45:09,183 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:45:09,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:09,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:09,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:09,200 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-13 20:45:09,201 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 53 treesize of output 1 [2021-07-13 20:45:09,201 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:45:09,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:09,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:09,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:09,227 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:45:09,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 71 [2021-07-13 20:45:09,236 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:45:09,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:09,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:09,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:09,254 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-13 20:45:09,254 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 48 treesize of output 1 [2021-07-13 20:45:09,254 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:45:09,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:09,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:09,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:09,271 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-13 20:45:09,272 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 65 treesize of output 1 [2021-07-13 20:45:09,272 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:45:09,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:09,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:09,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:09,289 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-13 20:45:09,290 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 63 treesize of output 1 [2021-07-13 20:45:09,290 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:45:09,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:09,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:09,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:45:09,301 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-13 20:45:09,301 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 58 treesize of output 1 [2021-07-13 20:45:09,301 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:45:09,382 INFO L628 ElimStorePlain]: treesize reduction 242, result has 22.4 percent of original size [2021-07-13 20:45:09,383 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:45:09,383 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:1081, output treesize:70 [2021-07-13 20:45:09,479 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 20:45:09,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742974701] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:09,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:09,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-07-13 20:45:09,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236692999] [2021-07-13 20:45:09,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:45:09,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:09,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:45:09,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:45:09,479 INFO L87 Difference]: Start difference. First operand 2120 states and 7165 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 20:45:10,970 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2021-07-13 20:45:11,140 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2021-07-13 20:45:11,470 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 70 [2021-07-13 20:45:11,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:11,770 INFO L93 Difference]: Finished difference Result 2604 states and 8571 transitions. [2021-07-13 20:45:11,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:45:11,770 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 20:45:11,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:11,774 INFO L225 Difference]: With dead ends: 2604 [2021-07-13 20:45:11,774 INFO L226 Difference]: Without dead ends: 2574 [2021-07-13 20:45:11,775 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 2195.1ms TimeCoverageRelationStatistics Valid=315, Invalid=1325, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:45:11,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2574 states. [2021-07-13 20:45:11,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2574 to 2120. [2021-07-13 20:45:11,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2120 states, 2119 states have (on average 3.381311939594148) internal successors, (7165), 2119 states have internal predecessors, (7165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:11,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 7165 transitions. [2021-07-13 20:45:11,802 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 7165 transitions. Word has length 26 [2021-07-13 20:45:11,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:11,802 INFO L482 AbstractCegarLoop]: Abstraction has 2120 states and 7165 transitions. [2021-07-13 20:45:11,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 20:45:11,802 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 7165 transitions. [2021-07-13 20:45:11,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:11,805 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:11,805 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 20:45:12,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3485 [2021-07-13 20:45:12,013 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:12,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:12,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1424792101, now seen corresponding path program 58 times [2021-07-13 20:45:12,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:12,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180670152] [2021-07-13 20:45:12,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:12,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:12,048 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 20:45:12,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:12,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180670152] [2021-07-13 20:45:12,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180670152] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:12,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144052471] [2021-07-13 20:45:12,049 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:12,072 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:45:12,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:12,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:12,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:12,172 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 20:45:12,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144052471] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:12,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:12,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:45:12,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501784363] [2021-07-13 20:45:12,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:45:12,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:12,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:45:12,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:45:12,173 INFO L87 Difference]: Start difference. First operand 2120 states and 7165 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 20:45:13,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:13,022 INFO L93 Difference]: Finished difference Result 5051 states and 15656 transitions. [2021-07-13 20:45:13,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 20:45:13,022 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 20:45:13,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:13,032 INFO L225 Difference]: With dead ends: 5051 [2021-07-13 20:45:13,033 INFO L226 Difference]: Without dead ends: 5051 [2021-07-13 20:45:13,033 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 468.2ms TimeCoverageRelationStatistics Valid=802, Invalid=2858, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:45:13,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5051 states. [2021-07-13 20:45:13,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5051 to 2317. [2021-07-13 20:45:13,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2317 states, 2316 states have (on average 3.435233160621762) internal successors, (7956), 2316 states have internal predecessors, (7956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:13,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 7956 transitions. [2021-07-13 20:45:13,091 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 7956 transitions. Word has length 28 [2021-07-13 20:45:13,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:13,091 INFO L482 AbstractCegarLoop]: Abstraction has 2317 states and 7956 transitions. [2021-07-13 20:45:13,091 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 20:45:13,091 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 7956 transitions. [2021-07-13 20:45:13,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:13,094 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:13,094 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 20:45:13,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3515,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:13,311 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:13,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:13,311 INFO L82 PathProgramCache]: Analyzing trace with hash 448473257, now seen corresponding path program 59 times [2021-07-13 20:45:13,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:13,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031503462] [2021-07-13 20:45:13,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:13,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:13,344 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 20:45:13,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:13,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031503462] [2021-07-13 20:45:13,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031503462] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:13,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204973266] [2021-07-13 20:45:13,344 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:13,369 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:45:13,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:13,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:13,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:13,489 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 20:45:13,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204973266] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:13,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:13,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 20:45:13,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400025173] [2021-07-13 20:45:13,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:45:13,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:13,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:45:13,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:45:13,490 INFO L87 Difference]: Start difference. First operand 2317 states and 7956 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 20:45:14,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:14,682 INFO L93 Difference]: Finished difference Result 6617 states and 20175 transitions. [2021-07-13 20:45:14,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-13 20:45:14,683 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 20:45:14,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:14,694 INFO L225 Difference]: With dead ends: 6617 [2021-07-13 20:45:14,695 INFO L226 Difference]: Without dead ends: 6617 [2021-07-13 20:45:14,695 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 703.5ms TimeCoverageRelationStatistics Valid=1110, Invalid=4590, Unknown=0, NotChecked=0, Total=5700 [2021-07-13 20:45:14,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6617 states. [2021-07-13 20:45:14,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6617 to 2331. [2021-07-13 20:45:14,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 2330 states have (on average 3.4437768240343347) internal successors, (8024), 2330 states have internal predecessors, (8024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:14,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 8024 transitions. [2021-07-13 20:45:14,756 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 8024 transitions. Word has length 28 [2021-07-13 20:45:14,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:14,756 INFO L482 AbstractCegarLoop]: Abstraction has 2331 states and 8024 transitions. [2021-07-13 20:45:14,756 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 20:45:14,756 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 8024 transitions. [2021-07-13 20:45:14,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:14,759 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:14,759 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 20:45:14,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3516 [2021-07-13 20:45:14,973 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:14,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:14,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1977377901, now seen corresponding path program 60 times [2021-07-13 20:45:14,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:14,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530478359] [2021-07-13 20:45:14,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:14,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:15,011 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 20:45:15,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:15,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530478359] [2021-07-13 20:45:15,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530478359] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:15,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919580559] [2021-07-13 20:45:15,012 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:15,036 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:45:15,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:15,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:15,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:15,147 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 20:45:15,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919580559] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:15,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:15,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 20:45:15,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314267859] [2021-07-13 20:45:15,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:45:15,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:15,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:45:15,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:45:15,148 INFO L87 Difference]: Start difference. First operand 2331 states and 8024 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 20:45:16,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:16,306 INFO L93 Difference]: Finished difference Result 6008 states and 18701 transitions. [2021-07-13 20:45:16,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-13 20:45:16,306 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 20:45:16,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:16,318 INFO L225 Difference]: With dead ends: 6008 [2021-07-13 20:45:16,318 INFO L226 Difference]: Without dead ends: 6008 [2021-07-13 20:45:16,319 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 707.3ms TimeCoverageRelationStatistics Valid=1099, Invalid=4451, Unknown=0, NotChecked=0, Total=5550 [2021-07-13 20:45:16,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6008 states. [2021-07-13 20:45:16,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6008 to 2276. [2021-07-13 20:45:16,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2276 states, 2275 states have (on average 3.418901098901099) internal successors, (7778), 2275 states have internal predecessors, (7778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:16,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2276 states to 2276 states and 7778 transitions. [2021-07-13 20:45:16,385 INFO L78 Accepts]: Start accepts. Automaton has 2276 states and 7778 transitions. Word has length 28 [2021-07-13 20:45:16,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:16,386 INFO L482 AbstractCegarLoop]: Abstraction has 2276 states and 7778 transitions. [2021-07-13 20:45:16,386 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 20:45:16,386 INFO L276 IsEmpty]: Start isEmpty. Operand 2276 states and 7778 transitions. [2021-07-13 20:45:16,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:16,389 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:16,389 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 20:45:16,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3517,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:16,605 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:16,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:16,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1153995099, now seen corresponding path program 61 times [2021-07-13 20:45:16,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:16,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744978858] [2021-07-13 20:45:16,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:16,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:16,641 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 20:45:16,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:16,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744978858] [2021-07-13 20:45:16,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744978858] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:16,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720785353] [2021-07-13 20:45:16,642 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:16,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:16,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:16,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:16,743 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 20:45:16,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720785353] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:16,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:16,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:45:16,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46015157] [2021-07-13 20:45:16,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:45:16,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:16,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:45:16,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:45:16,744 INFO L87 Difference]: Start difference. First operand 2276 states and 7778 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 20:45:17,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:17,714 INFO L93 Difference]: Finished difference Result 5144 states and 15840 transitions. [2021-07-13 20:45:17,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-13 20:45:17,715 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 20:45:17,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:17,723 INFO L225 Difference]: With dead ends: 5144 [2021-07-13 20:45:17,724 INFO L226 Difference]: Without dead ends: 5144 [2021-07-13 20:45:17,724 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 552.6ms TimeCoverageRelationStatistics Valid=904, Invalid=3652, Unknown=0, NotChecked=0, Total=4556 [2021-07-13 20:45:17,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5144 states. [2021-07-13 20:45:17,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5144 to 2286. [2021-07-13 20:45:17,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2286 states, 2285 states have (on average 3.415317286652079) internal successors, (7804), 2285 states have internal predecessors, (7804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:17,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2286 states to 2286 states and 7804 transitions. [2021-07-13 20:45:17,771 INFO L78 Accepts]: Start accepts. Automaton has 2286 states and 7804 transitions. Word has length 28 [2021-07-13 20:45:17,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:17,771 INFO L482 AbstractCegarLoop]: Abstraction has 2286 states and 7804 transitions. [2021-07-13 20:45:17,771 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 20:45:17,771 INFO L276 IsEmpty]: Start isEmpty. Operand 2286 states and 7804 transitions. [2021-07-13 20:45:17,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:17,774 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:17,774 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 20:45:17,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3518 [2021-07-13 20:45:17,990 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:17,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:17,990 INFO L82 PathProgramCache]: Analyzing trace with hash 987823393, now seen corresponding path program 67 times [2021-07-13 20:45:17,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:17,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467415700] [2021-07-13 20:45:17,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:17,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:18,025 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 20:45:18,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:18,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467415700] [2021-07-13 20:45:18,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467415700] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:18,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532034644] [2021-07-13 20:45:18,026 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 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 20:45:18,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:18,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:18,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:18,120 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 20:45:18,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532034644] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:18,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:18,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-13 20:45:18,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700590855] [2021-07-13 20:45:18,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:45:18,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:18,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:45:18,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:45:18,121 INFO L87 Difference]: Start difference. First operand 2286 states and 7804 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 20:45:18,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:18,645 INFO L93 Difference]: Finished difference Result 4580 states and 14284 transitions. [2021-07-13 20:45:18,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:45:18,645 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 20:45:18,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:18,654 INFO L225 Difference]: With dead ends: 4580 [2021-07-13 20:45:18,654 INFO L226 Difference]: Without dead ends: 4580 [2021-07-13 20:45:18,654 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 270.8ms TimeCoverageRelationStatistics Valid=383, Invalid=1339, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:45:18,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4580 states. [2021-07-13 20:45:18,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4580 to 2356. [2021-07-13 20:45:18,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2356 states, 2355 states have (on average 3.4) internal successors, (8007), 2355 states have internal predecessors, (8007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:18,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2356 states to 2356 states and 8007 transitions. [2021-07-13 20:45:18,706 INFO L78 Accepts]: Start accepts. Automaton has 2356 states and 8007 transitions. Word has length 28 [2021-07-13 20:45:18,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:18,706 INFO L482 AbstractCegarLoop]: Abstraction has 2356 states and 8007 transitions. [2021-07-13 20:45:18,706 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 20:45:18,706 INFO L276 IsEmpty]: Start isEmpty. Operand 2356 states and 8007 transitions. [2021-07-13 20:45:18,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:18,710 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:18,710 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 20:45:18,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3519 [2021-07-13 20:45:18,926 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:18,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:18,926 INFO L82 PathProgramCache]: Analyzing trace with hash 846454761, now seen corresponding path program 62 times [2021-07-13 20:45:18,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:18,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107449004] [2021-07-13 20:45:18,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:18,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:18,949 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 20:45:18,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:18,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107449004] [2021-07-13 20:45:18,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107449004] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:18,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097815230] [2021-07-13 20:45:18,950 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 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 20:45:18,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:45:18,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:18,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:45:18,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:19,020 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 20:45:19,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097815230] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:19,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:19,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:45:19,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239624208] [2021-07-13 20:45:19,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:45:19,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:19,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:45:19,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:45:19,021 INFO L87 Difference]: Start difference. First operand 2356 states and 8007 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 20:45:19,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:19,178 INFO L93 Difference]: Finished difference Result 3884 states and 12614 transitions. [2021-07-13 20:45:19,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:45:19,179 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 20:45:19,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:19,186 INFO L225 Difference]: With dead ends: 3884 [2021-07-13 20:45:19,186 INFO L226 Difference]: Without dead ends: 3866 [2021-07-13 20:45:19,187 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 92.3ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:45:19,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3866 states. [2021-07-13 20:45:19,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3866 to 2736. [2021-07-13 20:45:19,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2736 states, 2735 states have (on average 3.4661791590493602) internal successors, (9480), 2735 states have internal predecessors, (9480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:19,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2736 states to 2736 states and 9480 transitions. [2021-07-13 20:45:19,230 INFO L78 Accepts]: Start accepts. Automaton has 2736 states and 9480 transitions. Word has length 28 [2021-07-13 20:45:19,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:19,230 INFO L482 AbstractCegarLoop]: Abstraction has 2736 states and 9480 transitions. [2021-07-13 20:45:19,231 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 20:45:19,231 INFO L276 IsEmpty]: Start isEmpty. Operand 2736 states and 9480 transitions. [2021-07-13 20:45:19,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:19,234 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:19,234 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 20:45:19,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3520,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:19,450 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:19,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:19,450 INFO L82 PathProgramCache]: Analyzing trace with hash 409486053, now seen corresponding path program 63 times [2021-07-13 20:45:19,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:19,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420234787] [2021-07-13 20:45:19,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:19,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:19,478 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 20:45:19,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:19,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420234787] [2021-07-13 20:45:19,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420234787] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:19,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762842371] [2021-07-13 20:45:19,478 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 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 20:45:19,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:45:19,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:19,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:45:19,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:19,565 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 20:45:19,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762842371] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:19,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:19,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 20:45:19,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304768551] [2021-07-13 20:45:19,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:45:19,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:19,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:45:19,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:45:19,566 INFO L87 Difference]: Start difference. First operand 2736 states and 9480 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 20:45:20,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:20,202 INFO L93 Difference]: Finished difference Result 4561 states and 14499 transitions. [2021-07-13 20:45:20,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:45:20,202 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 20:45:20,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:20,210 INFO L225 Difference]: With dead ends: 4561 [2021-07-13 20:45:20,210 INFO L226 Difference]: Without dead ends: 4514 [2021-07-13 20:45:20,210 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 327.8ms TimeCoverageRelationStatistics Valid=515, Invalid=1465, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:45:20,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4514 states. [2021-07-13 20:45:20,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4514 to 2898. [2021-07-13 20:45:20,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2898 states, 2897 states have (on average 3.486365205384881) internal successors, (10100), 2897 states have internal predecessors, (10100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:20,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2898 states to 2898 states and 10100 transitions. [2021-07-13 20:45:20,264 INFO L78 Accepts]: Start accepts. Automaton has 2898 states and 10100 transitions. Word has length 28 [2021-07-13 20:45:20,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:20,264 INFO L482 AbstractCegarLoop]: Abstraction has 2898 states and 10100 transitions. [2021-07-13 20:45:20,264 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 20:45:20,264 INFO L276 IsEmpty]: Start isEmpty. Operand 2898 states and 10100 transitions. [2021-07-13 20:45:20,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:20,268 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:20,268 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 20:45:20,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3521,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:20,484 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:20,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:20,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1945575529, now seen corresponding path program 64 times [2021-07-13 20:45:20,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:20,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981071534] [2021-07-13 20:45:20,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:20,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:20,514 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 20:45:20,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:20,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981071534] [2021-07-13 20:45:20,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981071534] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:20,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542909105] [2021-07-13 20:45:20,514 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 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 20:45:20,541 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:45:20,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:20,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:45:20,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:20,633 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 20:45:20,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542909105] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:20,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:20,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 20:45:20,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088147642] [2021-07-13 20:45:20,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:45:20,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:20,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:45:20,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:45:20,634 INFO L87 Difference]: Start difference. First operand 2898 states and 10100 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 20:45:21,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:21,315 INFO L93 Difference]: Finished difference Result 4846 states and 15131 transitions. [2021-07-13 20:45:21,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:45:21,315 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 20:45:21,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:21,323 INFO L225 Difference]: With dead ends: 4846 [2021-07-13 20:45:21,323 INFO L226 Difference]: Without dead ends: 4820 [2021-07-13 20:45:21,324 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 434.0ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:45:21,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4820 states. [2021-07-13 20:45:21,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4820 to 2913. [2021-07-13 20:45:21,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2913 states, 2912 states have (on average 3.4903846153846154) internal successors, (10164), 2912 states have internal predecessors, (10164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:21,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2913 states to 2913 states and 10164 transitions. [2021-07-13 20:45:21,378 INFO L78 Accepts]: Start accepts. Automaton has 2913 states and 10164 transitions. Word has length 28 [2021-07-13 20:45:21,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:21,378 INFO L482 AbstractCegarLoop]: Abstraction has 2913 states and 10164 transitions. [2021-07-13 20:45:21,378 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 20:45:21,378 INFO L276 IsEmpty]: Start isEmpty. Operand 2913 states and 10164 transitions. [2021-07-13 20:45:21,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:21,382 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:21,382 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 20:45:21,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3522,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:21,598 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:21,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:21,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1676978985, now seen corresponding path program 65 times [2021-07-13 20:45:21,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:21,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503060206] [2021-07-13 20:45:21,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:21,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:21,628 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 20:45:21,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:21,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503060206] [2021-07-13 20:45:21,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503060206] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:21,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429696615] [2021-07-13 20:45:21,628 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 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 20:45:21,652 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:45:21,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:21,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:45:21,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:21,743 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 20:45:21,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429696615] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:21,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:21,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 20:45:21,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544268496] [2021-07-13 20:45:21,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:45:21,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:21,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:45:21,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:45:21,744 INFO L87 Difference]: Start difference. First operand 2913 states and 10164 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 20:45:22,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:22,341 INFO L93 Difference]: Finished difference Result 4838 states and 15131 transitions. [2021-07-13 20:45:22,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:45:22,342 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 20:45:22,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:22,350 INFO L225 Difference]: With dead ends: 4838 [2021-07-13 20:45:22,351 INFO L226 Difference]: Without dead ends: 4823 [2021-07-13 20:45:22,351 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 390.1ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:45:22,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4823 states. [2021-07-13 20:45:22,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4823 to 2913. [2021-07-13 20:45:22,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2913 states, 2912 states have (on average 3.48592032967033) internal successors, (10151), 2912 states have internal predecessors, (10151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:22,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2913 states to 2913 states and 10151 transitions. [2021-07-13 20:45:22,412 INFO L78 Accepts]: Start accepts. Automaton has 2913 states and 10151 transitions. Word has length 28 [2021-07-13 20:45:22,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:22,412 INFO L482 AbstractCegarLoop]: Abstraction has 2913 states and 10151 transitions. [2021-07-13 20:45:22,413 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 20:45:22,413 INFO L276 IsEmpty]: Start isEmpty. Operand 2913 states and 10151 transitions. [2021-07-13 20:45:22,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:22,417 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:22,417 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 20:45:22,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3523 [2021-07-13 20:45:22,633 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:22,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:22,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1569189389, now seen corresponding path program 66 times [2021-07-13 20:45:22,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:22,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374227191] [2021-07-13 20:45:22,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:22,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:22,656 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 20:45:22,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:22,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374227191] [2021-07-13 20:45:22,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374227191] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:22,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140216730] [2021-07-13 20:45:22,657 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 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 20:45:22,681 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:45:22,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:22,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:45:22,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:22,738 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 20:45:22,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140216730] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:22,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:22,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:45:22,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039582580] [2021-07-13 20:45:22,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:45:22,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:22,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:45:22,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:45:22,739 INFO L87 Difference]: Start difference. First operand 2913 states and 10151 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 20:45:23,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:23,219 INFO L93 Difference]: Finished difference Result 5599 states and 17892 transitions. [2021-07-13 20:45:23,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:45:23,219 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 20:45:23,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:23,229 INFO L225 Difference]: With dead ends: 5599 [2021-07-13 20:45:23,230 INFO L226 Difference]: Without dead ends: 5552 [2021-07-13 20:45:23,230 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 270.2ms TimeCoverageRelationStatistics Valid=455, Invalid=1267, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:45:23,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5552 states. [2021-07-13 20:45:23,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5552 to 3063. [2021-07-13 20:45:23,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3063 states, 3062 states have (on average 3.5303723056825604) internal successors, (10810), 3062 states have internal predecessors, (10810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:23,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3063 states to 3063 states and 10810 transitions. [2021-07-13 20:45:23,293 INFO L78 Accepts]: Start accepts. Automaton has 3063 states and 10810 transitions. Word has length 28 [2021-07-13 20:45:23,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:23,293 INFO L482 AbstractCegarLoop]: Abstraction has 3063 states and 10810 transitions. [2021-07-13 20:45:23,293 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 20:45:23,293 INFO L276 IsEmpty]: Start isEmpty. Operand 3063 states and 10810 transitions. [2021-07-13 20:45:23,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:23,297 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:23,297 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 20:45:23,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3524,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:23,503 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:23,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:23,503 INFO L82 PathProgramCache]: Analyzing trace with hash -641999155, now seen corresponding path program 67 times [2021-07-13 20:45:23,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:23,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588486196] [2021-07-13 20:45:23,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:23,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:23,523 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 20:45:23,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:23,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588486196] [2021-07-13 20:45:23,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588486196] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:23,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852733824] [2021-07-13 20:45:23,523 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 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 20:45:23,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:23,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:45:23,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:23,598 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 20:45:23,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852733824] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:23,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:23,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 20:45:23,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986305170] [2021-07-13 20:45:23,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:45:23,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:23,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:45:23,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:45:23,598 INFO L87 Difference]: Start difference. First operand 3063 states and 10810 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 20:45:23,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:23,765 INFO L93 Difference]: Finished difference Result 4390 states and 14427 transitions. [2021-07-13 20:45:23,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:45:23,766 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 20:45:23,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:23,773 INFO L225 Difference]: With dead ends: 4390 [2021-07-13 20:45:23,773 INFO L226 Difference]: Without dead ends: 4390 [2021-07-13 20:45:23,774 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 104.4ms TimeCoverageRelationStatistics Valid=132, Invalid=210, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:45:23,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4390 states. [2021-07-13 20:45:23,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4390 to 2947. [2021-07-13 20:45:23,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2947 states, 2946 states have (on average 3.5020366598778003) internal successors, (10317), 2946 states have internal predecessors, (10317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:23,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2947 states to 2947 states and 10317 transitions. [2021-07-13 20:45:23,851 INFO L78 Accepts]: Start accepts. Automaton has 2947 states and 10317 transitions. Word has length 28 [2021-07-13 20:45:23,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:23,851 INFO L482 AbstractCegarLoop]: Abstraction has 2947 states and 10317 transitions. [2021-07-13 20:45:23,851 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 20:45:23,852 INFO L276 IsEmpty]: Start isEmpty. Operand 2947 states and 10317 transitions. [2021-07-13 20:45:23,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:23,855 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:23,855 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 20:45:24,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3525,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:24,067 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:24,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:24,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1988680721, now seen corresponding path program 68 times [2021-07-13 20:45:24,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:24,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184123253] [2021-07-13 20:45:24,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:24,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:24,097 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 20:45:24,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:24,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184123253] [2021-07-13 20:45:24,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184123253] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:24,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596145633] [2021-07-13 20:45:24,097 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 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 20:45:24,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:45:24,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:24,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:24,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:24,188 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 20:45:24,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596145633] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:24,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:24,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:45:24,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218710307] [2021-07-13 20:45:24,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:45:24,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:24,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:45:24,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:45:24,189 INFO L87 Difference]: Start difference. First operand 2947 states and 10317 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 20:45:24,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:24,712 INFO L93 Difference]: Finished difference Result 6294 states and 19912 transitions. [2021-07-13 20:45:24,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-13 20:45:24,713 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 20:45:24,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:24,725 INFO L225 Difference]: With dead ends: 6294 [2021-07-13 20:45:24,725 INFO L226 Difference]: Without dead ends: 6294 [2021-07-13 20:45:24,725 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 318.4ms TimeCoverageRelationStatistics Valid=552, Invalid=1800, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:45:24,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6294 states. [2021-07-13 20:45:24,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6294 to 2965. [2021-07-13 20:45:24,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2965 states, 2964 states have (on average 3.5020242914979756) internal successors, (10380), 2964 states have internal predecessors, (10380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:24,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2965 states to 2965 states and 10380 transitions. [2021-07-13 20:45:24,796 INFO L78 Accepts]: Start accepts. Automaton has 2965 states and 10380 transitions. Word has length 28 [2021-07-13 20:45:24,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:24,797 INFO L482 AbstractCegarLoop]: Abstraction has 2965 states and 10380 transitions. [2021-07-13 20:45:24,797 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 20:45:24,797 INFO L276 IsEmpty]: Start isEmpty. Operand 2965 states and 10380 transitions. [2021-07-13 20:45:24,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:24,801 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:24,801 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 20:45:25,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3526 [2021-07-13 20:45:25,016 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:25,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:25,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1203766627, now seen corresponding path program 69 times [2021-07-13 20:45:25,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:25,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587700623] [2021-07-13 20:45:25,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:25,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:25,045 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 20:45:25,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:25,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587700623] [2021-07-13 20:45:25,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587700623] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:25,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999027285] [2021-07-13 20:45:25,046 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 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 20:45:25,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:45:25,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:25,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:25,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:25,129 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 20:45:25,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999027285] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:25,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:25,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:45:25,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012016038] [2021-07-13 20:45:25,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:45:25,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:25,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:45:25,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:45:25,130 INFO L87 Difference]: Start difference. First operand 2965 states and 10380 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 20:45:25,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:25,824 INFO L93 Difference]: Finished difference Result 6549 states and 20685 transitions. [2021-07-13 20:45:25,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-13 20:45:25,825 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 20:45:25,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:25,837 INFO L225 Difference]: With dead ends: 6549 [2021-07-13 20:45:25,837 INFO L226 Difference]: Without dead ends: 6549 [2021-07-13 20:45:25,837 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 375.0ms TimeCoverageRelationStatistics Valid=634, Invalid=2336, Unknown=0, NotChecked=0, Total=2970 [2021-07-13 20:45:25,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6549 states. [2021-07-13 20:45:25,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6549 to 3059. [2021-07-13 20:45:25,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3059 states, 3058 states have (on average 3.4947678221059517) internal successors, (10687), 3058 states have internal predecessors, (10687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:25,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3059 states to 3059 states and 10687 transitions. [2021-07-13 20:45:25,908 INFO L78 Accepts]: Start accepts. Automaton has 3059 states and 10687 transitions. Word has length 28 [2021-07-13 20:45:25,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:25,908 INFO L482 AbstractCegarLoop]: Abstraction has 3059 states and 10687 transitions. [2021-07-13 20:45:25,908 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 20:45:25,909 INFO L276 IsEmpty]: Start isEmpty. Operand 3059 states and 10687 transitions. [2021-07-13 20:45:25,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:25,912 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:25,912 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 20:45:26,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3527,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:26,127 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:26,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:26,128 INFO L82 PathProgramCache]: Analyzing trace with hash 2008178013, now seen corresponding path program 70 times [2021-07-13 20:45:26,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:26,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300989731] [2021-07-13 20:45:26,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:26,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:26,155 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 20:45:26,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:26,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300989731] [2021-07-13 20:45:26,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300989731] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:26,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048945857] [2021-07-13 20:45:26,155 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 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 20:45:26,176 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:45:26,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:26,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:45:26,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:26,232 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 20:45:26,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048945857] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:26,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:26,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:45:26,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503902511] [2021-07-13 20:45:26,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:45:26,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:26,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:45:26,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:45:26,233 INFO L87 Difference]: Start difference. First operand 3059 states and 10687 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 20:45:26,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:26,771 INFO L93 Difference]: Finished difference Result 6709 states and 21196 transitions. [2021-07-13 20:45:26,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:45:26,773 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 20:45:26,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:26,785 INFO L225 Difference]: With dead ends: 6709 [2021-07-13 20:45:26,785 INFO L226 Difference]: Without dead ends: 6673 [2021-07-13 20:45:26,785 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 300.5ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:45:26,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6673 states. [2021-07-13 20:45:26,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6673 to 3461. [2021-07-13 20:45:26,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3461 states, 3460 states have (on average 3.5245664739884393) internal successors, (12195), 3460 states have internal predecessors, (12195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:26,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3461 states to 3461 states and 12195 transitions. [2021-07-13 20:45:26,868 INFO L78 Accepts]: Start accepts. Automaton has 3461 states and 12195 transitions. Word has length 28 [2021-07-13 20:45:26,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:26,868 INFO L482 AbstractCegarLoop]: Abstraction has 3461 states and 12195 transitions. [2021-07-13 20:45:26,868 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 20:45:26,868 INFO L276 IsEmpty]: Start isEmpty. Operand 3461 states and 12195 transitions. [2021-07-13 20:45:26,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:26,873 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:26,873 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 20:45:27,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3528 [2021-07-13 20:45:27,088 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:27,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:27,089 INFO L82 PathProgramCache]: Analyzing trace with hash -815711165, now seen corresponding path program 71 times [2021-07-13 20:45:27,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:27,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778217287] [2021-07-13 20:45:27,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:27,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:27,117 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 20:45:27,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:27,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778217287] [2021-07-13 20:45:27,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778217287] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:27,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629244726] [2021-07-13 20:45:27,117 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 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 20:45:27,147 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:45:27,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:27,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:45:27,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:27,209 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 20:45:27,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629244726] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:27,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:27,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:45:27,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949380118] [2021-07-13 20:45:27,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:45:27,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:27,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:45:27,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:45:27,210 INFO L87 Difference]: Start difference. First operand 3461 states and 12195 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 20:45:27,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:27,765 INFO L93 Difference]: Finished difference Result 6846 states and 21557 transitions. [2021-07-13 20:45:27,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:45:27,766 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 20:45:27,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:27,784 INFO L225 Difference]: With dead ends: 6846 [2021-07-13 20:45:27,784 INFO L226 Difference]: Without dead ends: 6846 [2021-07-13 20:45:27,784 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 325.6ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:45:27,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6846 states. [2021-07-13 20:45:27,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6846 to 3175. [2021-07-13 20:45:27,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3175 states, 3174 states have (on average 3.484247006931317) internal successors, (11059), 3174 states have internal predecessors, (11059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:27,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3175 states to 3175 states and 11059 transitions. [2021-07-13 20:45:27,868 INFO L78 Accepts]: Start accepts. Automaton has 3175 states and 11059 transitions. Word has length 28 [2021-07-13 20:45:27,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:27,868 INFO L482 AbstractCegarLoop]: Abstraction has 3175 states and 11059 transitions. [2021-07-13 20:45:27,868 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 20:45:27,868 INFO L276 IsEmpty]: Start isEmpty. Operand 3175 states and 11059 transitions. [2021-07-13 20:45:27,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:27,873 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:27,873 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 20:45:28,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3529 [2021-07-13 20:45:28,088 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:28,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:28,089 INFO L82 PathProgramCache]: Analyzing trace with hash -257646883, now seen corresponding path program 72 times [2021-07-13 20:45:28,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:28,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432089849] [2021-07-13 20:45:28,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:28,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:28,118 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 20:45:28,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:28,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432089849] [2021-07-13 20:45:28,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432089849] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:28,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173106732] [2021-07-13 20:45:28,119 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 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 20:45:28,145 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:45:28,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:28,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:28,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:28,213 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 20:45:28,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173106732] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:28,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:28,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:45:28,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976235084] [2021-07-13 20:45:28,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:45:28,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:28,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:45:28,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:45:28,214 INFO L87 Difference]: Start difference. First operand 3175 states and 11059 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 20:45:28,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:28,967 INFO L93 Difference]: Finished difference Result 6061 states and 19490 transitions. [2021-07-13 20:45:28,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-13 20:45:28,967 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 20:45:28,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:28,979 INFO L225 Difference]: With dead ends: 6061 [2021-07-13 20:45:28,979 INFO L226 Difference]: Without dead ends: 6057 [2021-07-13 20:45:28,980 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 382.7ms TimeCoverageRelationStatistics Valid=600, Invalid=2052, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 20:45:28,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6057 states. [2021-07-13 20:45:29,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6057 to 2935. [2021-07-13 20:45:29,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2935 states, 2934 states have (on average 3.507498295841854) internal successors, (10291), 2934 states have internal predecessors, (10291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:29,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2935 states to 2935 states and 10291 transitions. [2021-07-13 20:45:29,047 INFO L78 Accepts]: Start accepts. Automaton has 2935 states and 10291 transitions. Word has length 28 [2021-07-13 20:45:29,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:29,047 INFO L482 AbstractCegarLoop]: Abstraction has 2935 states and 10291 transitions. [2021-07-13 20:45:29,048 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 20:45:29,048 INFO L276 IsEmpty]: Start isEmpty. Operand 2935 states and 10291 transitions. [2021-07-13 20:45:29,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:29,051 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:29,051 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 20:45:29,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3530,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:29,252 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:29,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:29,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1520596959, now seen corresponding path program 73 times [2021-07-13 20:45:29,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:29,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908835601] [2021-07-13 20:45:29,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:29,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:29,287 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 20:45:29,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:29,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908835601] [2021-07-13 20:45:29,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908835601] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:29,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757295345] [2021-07-13 20:45:29,287 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 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 20:45:29,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:29,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:29,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:29,407 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 20:45:29,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757295345] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:29,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:29,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 20:45:29,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265701171] [2021-07-13 20:45:29,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:45:29,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:29,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:45:29,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:45:29,408 INFO L87 Difference]: Start difference. First operand 2935 states and 10291 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 20:45:30,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:30,395 INFO L93 Difference]: Finished difference Result 9324 states and 30354 transitions. [2021-07-13 20:45:30,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-13 20:45:30,395 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 20:45:30,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:30,414 INFO L225 Difference]: With dead ends: 9324 [2021-07-13 20:45:30,414 INFO L226 Difference]: Without dead ends: 9324 [2021-07-13 20:45:30,415 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 567.6ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-07-13 20:45:30,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9324 states. [2021-07-13 20:45:30,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9324 to 3117. [2021-07-13 20:45:30,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3117 states, 3116 states have (on average 3.5805519897304237) internal successors, (11157), 3116 states have internal predecessors, (11157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:30,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3117 states to 3117 states and 11157 transitions. [2021-07-13 20:45:30,517 INFO L78 Accepts]: Start accepts. Automaton has 3117 states and 11157 transitions. Word has length 28 [2021-07-13 20:45:30,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:30,517 INFO L482 AbstractCegarLoop]: Abstraction has 3117 states and 11157 transitions. [2021-07-13 20:45:30,517 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 20:45:30,517 INFO L276 IsEmpty]: Start isEmpty. Operand 3117 states and 11157 transitions. [2021-07-13 20:45:30,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:30,521 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:30,521 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 20:45:30,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3531,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:30,737 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:30,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:30,737 INFO L82 PathProgramCache]: Analyzing trace with hash 8307685, now seen corresponding path program 74 times [2021-07-13 20:45:30,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:30,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940059667] [2021-07-13 20:45:30,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:30,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:30,769 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 20:45:30,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:30,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940059667] [2021-07-13 20:45:30,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940059667] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:30,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563001869] [2021-07-13 20:45:30,769 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 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 20:45:30,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:45:30,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:30,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:30,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:30,849 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 20:45:30,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563001869] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:30,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:30,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 20:45:30,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036890008] [2021-07-13 20:45:30,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:45:30,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:30,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:45:30,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:45:30,850 INFO L87 Difference]: Start difference. First operand 3117 states and 11157 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 20:45:31,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:31,536 INFO L93 Difference]: Finished difference Result 9147 states and 29872 transitions. [2021-07-13 20:45:31,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-13 20:45:31,536 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 20:45:31,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:31,554 INFO L225 Difference]: With dead ends: 9147 [2021-07-13 20:45:31,554 INFO L226 Difference]: Without dead ends: 9147 [2021-07-13 20:45:31,554 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1729 ImplicationChecksByTransitivity, 390.4ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-07-13 20:45:31,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9147 states. [2021-07-13 20:45:31,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9147 to 3083. [2021-07-13 20:45:31,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3083 states, 3082 states have (on average 3.562621674237508) internal successors, (10980), 3082 states have internal predecessors, (10980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:31,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3083 states to 3083 states and 10980 transitions. [2021-07-13 20:45:31,654 INFO L78 Accepts]: Start accepts. Automaton has 3083 states and 10980 transitions. Word has length 28 [2021-07-13 20:45:31,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:31,654 INFO L482 AbstractCegarLoop]: Abstraction has 3083 states and 10980 transitions. [2021-07-13 20:45:31,654 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 20:45:31,654 INFO L276 IsEmpty]: Start isEmpty. Operand 3083 states and 10980 transitions. [2021-07-13 20:45:31,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:31,659 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:31,659 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 20:45:31,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3532,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:31,873 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:31,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:31,873 INFO L82 PathProgramCache]: Analyzing trace with hash -2125990737, now seen corresponding path program 75 times [2021-07-13 20:45:31,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:31,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820184764] [2021-07-13 20:45:31,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:31,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:31,903 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 20:45:31,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:31,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820184764] [2021-07-13 20:45:31,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820184764] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:31,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182455975] [2021-07-13 20:45:31,904 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 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 20:45:31,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:45:31,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:31,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:31,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:31,999 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 20:45:32,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182455975] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:32,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:32,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 20:45:32,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851227229] [2021-07-13 20:45:32,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:45:32,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:32,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:45:32,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:45:32,000 INFO L87 Difference]: Start difference. First operand 3083 states and 10980 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 20:45:32,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:32,797 INFO L93 Difference]: Finished difference Result 8583 states and 27105 transitions. [2021-07-13 20:45:32,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-07-13 20:45:32,798 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 20:45:32,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:32,813 INFO L225 Difference]: With dead ends: 8583 [2021-07-13 20:45:32,813 INFO L226 Difference]: Without dead ends: 8583 [2021-07-13 20:45:32,814 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1465 ImplicationChecksByTransitivity, 416.3ms TimeCoverageRelationStatistics Valid=821, Invalid=3085, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 20:45:32,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8583 states. [2021-07-13 20:45:32,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8583 to 3103. [2021-07-13 20:45:32,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3103 states, 3102 states have (on average 3.5660863958736297) internal successors, (11062), 3102 states have internal predecessors, (11062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:32,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3103 states to 3103 states and 11062 transitions. [2021-07-13 20:45:32,903 INFO L78 Accepts]: Start accepts. Automaton has 3103 states and 11062 transitions. Word has length 28 [2021-07-13 20:45:32,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:32,904 INFO L482 AbstractCegarLoop]: Abstraction has 3103 states and 11062 transitions. [2021-07-13 20:45:32,904 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 20:45:32,904 INFO L276 IsEmpty]: Start isEmpty. Operand 3103 states and 11062 transitions. [2021-07-13 20:45:32,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:32,926 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:32,926 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 20:45:33,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3533 [2021-07-13 20:45:33,142 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:33,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:33,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1053673763, now seen corresponding path program 76 times [2021-07-13 20:45:33,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:33,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259380940] [2021-07-13 20:45:33,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:33,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:33,173 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 20:45:33,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:33,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259380940] [2021-07-13 20:45:33,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259380940] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:33,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316961337] [2021-07-13 20:45:33,173 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 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 20:45:33,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:45:33,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:33,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:33,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:33,276 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 20:45:33,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316961337] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:33,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:33,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 20:45:33,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431989404] [2021-07-13 20:45:33,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:45:33,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:33,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:45:33,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:45:33,277 INFO L87 Difference]: Start difference. First operand 3103 states and 11062 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 20:45:34,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:34,119 INFO L93 Difference]: Finished difference Result 8084 states and 25895 transitions. [2021-07-13 20:45:34,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-13 20:45:34,119 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 20:45:34,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:34,136 INFO L225 Difference]: With dead ends: 8084 [2021-07-13 20:45:34,136 INFO L226 Difference]: Without dead ends: 8076 [2021-07-13 20:45:34,136 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 459.7ms TimeCoverageRelationStatistics Valid=776, Invalid=2764, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:45:34,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8076 states. [2021-07-13 20:45:34,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8076 to 3085. [2021-07-13 20:45:34,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3085 states, 3084 states have (on average 3.5619325551232164) internal successors, (10985), 3084 states have internal predecessors, (10985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:34,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3085 states to 3085 states and 10985 transitions. [2021-07-13 20:45:34,230 INFO L78 Accepts]: Start accepts. Automaton has 3085 states and 10985 transitions. Word has length 28 [2021-07-13 20:45:34,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:34,230 INFO L482 AbstractCegarLoop]: Abstraction has 3085 states and 10985 transitions. [2021-07-13 20:45:34,230 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 20:45:34,231 INFO L276 IsEmpty]: Start isEmpty. Operand 3085 states and 10985 transitions. [2021-07-13 20:45:34,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:34,235 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:34,235 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 20:45:34,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3534,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:34,436 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:34,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:34,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1235475809, now seen corresponding path program 77 times [2021-07-13 20:45:34,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:34,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264293854] [2021-07-13 20:45:34,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:34,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:34,471 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 20:45:34,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:34,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264293854] [2021-07-13 20:45:34,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264293854] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:34,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715458862] [2021-07-13 20:45:34,471 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:45:34,499 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:45:34,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:34,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:34,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:34,594 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 20:45:34,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715458862] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:34,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:34,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 20:45:34,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352494827] [2021-07-13 20:45:34,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:45:34,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:34,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:45:34,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:45:34,595 INFO L87 Difference]: Start difference. First operand 3085 states and 10985 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 20:45:35,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:35,530 INFO L93 Difference]: Finished difference Result 8010 states and 25668 transitions. [2021-07-13 20:45:35,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-07-13 20:45:35,530 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 20:45:35,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:35,545 INFO L225 Difference]: With dead ends: 8010 [2021-07-13 20:45:35,545 INFO L226 Difference]: Without dead ends: 8010 [2021-07-13 20:45:35,546 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 543.6ms TimeCoverageRelationStatistics Valid=820, Invalid=2962, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 20:45:35,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8010 states. [2021-07-13 20:45:35,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8010 to 3101. [2021-07-13 20:45:35,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3101 states, 3100 states have (on average 3.5641935483870966) internal successors, (11049), 3100 states have internal predecessors, (11049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:35,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3101 states to 3101 states and 11049 transitions. [2021-07-13 20:45:35,625 INFO L78 Accepts]: Start accepts. Automaton has 3101 states and 11049 transitions. Word has length 28 [2021-07-13 20:45:35,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:35,625 INFO L482 AbstractCegarLoop]: Abstraction has 3101 states and 11049 transitions. [2021-07-13 20:45:35,625 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 20:45:35,625 INFO L276 IsEmpty]: Start isEmpty. Operand 3101 states and 11049 transitions. [2021-07-13 20:45:35,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:35,630 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:35,630 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 20:45:35,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3535 [2021-07-13 20:45:35,845 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:35,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:35,845 INFO L82 PathProgramCache]: Analyzing trace with hash 180098415, now seen corresponding path program 78 times [2021-07-13 20:45:35,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:35,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973741725] [2021-07-13 20:45:35,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:35,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:35,875 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 20:45:35,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:35,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973741725] [2021-07-13 20:45:35,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973741725] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:35,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138059337] [2021-07-13 20:45:35,876 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 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 20:45:35,900 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:45:35,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:35,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:35,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:36,000 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 20:45:36,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138059337] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:36,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:36,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 20:45:36,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156546847] [2021-07-13 20:45:36,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:45:36,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:36,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:45:36,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:45:36,001 INFO L87 Difference]: Start difference. First operand 3101 states and 11049 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 20:45:36,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:36,878 INFO L93 Difference]: Finished difference Result 7678 states and 24884 transitions. [2021-07-13 20:45:36,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-13 20:45:36,878 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 20:45:36,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:36,894 INFO L225 Difference]: With dead ends: 7678 [2021-07-13 20:45:36,894 INFO L226 Difference]: Without dead ends: 7670 [2021-07-13 20:45:36,895 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 462.2ms TimeCoverageRelationStatistics Valid=800, Invalid=2740, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:45:36,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7670 states. [2021-07-13 20:45:36,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7670 to 2858. [2021-07-13 20:45:36,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2858 states, 2857 states have (on average 3.4816240812040604) internal successors, (9947), 2857 states have internal predecessors, (9947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:37,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2858 states to 2858 states and 9947 transitions. [2021-07-13 20:45:37,002 INFO L78 Accepts]: Start accepts. Automaton has 2858 states and 9947 transitions. Word has length 28 [2021-07-13 20:45:37,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:37,002 INFO L482 AbstractCegarLoop]: Abstraction has 2858 states and 9947 transitions. [2021-07-13 20:45:37,002 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 20:45:37,002 INFO L276 IsEmpty]: Start isEmpty. Operand 2858 states and 9947 transitions. [2021-07-13 20:45:37,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:37,006 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:37,006 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 20:45:37,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3536,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:37,222 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:37,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:37,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1618231897, now seen corresponding path program 79 times [2021-07-13 20:45:37,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:37,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015068694] [2021-07-13 20:45:37,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:37,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:37,256 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 20:45:37,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:37,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015068694] [2021-07-13 20:45:37,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015068694] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:37,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010435696] [2021-07-13 20:45:37,257 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 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 20:45:37,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:37,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:37,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:37,360 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 20:45:37,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010435696] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:37,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:37,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-13 20:45:37,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514485825] [2021-07-13 20:45:37,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:45:37,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:37,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:45:37,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:45:37,361 INFO L87 Difference]: Start difference. First operand 2858 states and 9947 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 20:45:38,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:38,147 INFO L93 Difference]: Finished difference Result 5875 states and 18762 transitions. [2021-07-13 20:45:38,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-13 20:45:38,147 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 20:45:38,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:38,160 INFO L225 Difference]: With dead ends: 5875 [2021-07-13 20:45:38,160 INFO L226 Difference]: Without dead ends: 5875 [2021-07-13 20:45:38,160 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 470.5ms TimeCoverageRelationStatistics Valid=709, Invalid=2713, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 20:45:38,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5875 states. [2021-07-13 20:45:38,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5875 to 2870. [2021-07-13 20:45:38,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2870 states, 2869 states have (on average 3.480306727082607) internal successors, (9985), 2869 states have internal predecessors, (9985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:38,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2870 states to 2870 states and 9985 transitions. [2021-07-13 20:45:38,233 INFO L78 Accepts]: Start accepts. Automaton has 2870 states and 9985 transitions. Word has length 28 [2021-07-13 20:45:38,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:38,234 INFO L482 AbstractCegarLoop]: Abstraction has 2870 states and 9985 transitions. [2021-07-13 20:45:38,234 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 20:45:38,234 INFO L276 IsEmpty]: Start isEmpty. Operand 2870 states and 9985 transitions. [2021-07-13 20:45:38,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:38,238 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:38,238 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 20:45:38,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3537 [2021-07-13 20:45:38,453 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:38,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:38,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1792117207, now seen corresponding path program 80 times [2021-07-13 20:45:38,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:38,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56529481] [2021-07-13 20:45:38,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:38,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:38,484 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 20:45:38,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:38,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56529481] [2021-07-13 20:45:38,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56529481] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:38,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896941436] [2021-07-13 20:45:38,485 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 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 20:45:38,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:45:38,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:38,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:38,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:38,616 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 20:45:38,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896941436] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:38,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:38,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:45:38,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331551432] [2021-07-13 20:45:38,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:45:38,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:38,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:45:38,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:45:38,617 INFO L87 Difference]: Start difference. First operand 2870 states and 9985 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 20:45:39,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:39,765 INFO L93 Difference]: Finished difference Result 6654 states and 20757 transitions. [2021-07-13 20:45:39,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-13 20:45:39,766 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 28 [2021-07-13 20:45:39,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:39,779 INFO L225 Difference]: With dead ends: 6654 [2021-07-13 20:45:39,779 INFO L226 Difference]: Without dead ends: 6654 [2021-07-13 20:45:39,779 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1919 ImplicationChecksByTransitivity, 691.8ms TimeCoverageRelationStatistics Valid=1012, Invalid=4244, Unknown=0, NotChecked=0, Total=5256 [2021-07-13 20:45:39,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6654 states. [2021-07-13 20:45:39,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6654 to 2936. [2021-07-13 20:45:39,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2936 states, 2935 states have (on average 3.475979557069847) internal successors, (10202), 2935 states have internal predecessors, (10202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:39,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2936 states to 2936 states and 10202 transitions. [2021-07-13 20:45:39,851 INFO L78 Accepts]: Start accepts. Automaton has 2936 states and 10202 transitions. Word has length 28 [2021-07-13 20:45:39,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:39,851 INFO L482 AbstractCegarLoop]: Abstraction has 2936 states and 10202 transitions. [2021-07-13 20:45:39,851 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 20:45:39,851 INFO L276 IsEmpty]: Start isEmpty. Operand 2936 states and 10202 transitions. [2021-07-13 20:45:39,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:39,855 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:39,855 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 20:45:40,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3538,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:40,070 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:40,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:40,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1447472695, now seen corresponding path program 81 times [2021-07-13 20:45:40,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:40,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980760114] [2021-07-13 20:45:40,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:40,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:40,103 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 20:45:40,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:40,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980760114] [2021-07-13 20:45:40,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980760114] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:40,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230066341] [2021-07-13 20:45:40,103 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 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 20:45:40,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:45:40,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:40,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:40,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:40,238 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 20:45:40,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230066341] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:40,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:40,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:45:40,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066969364] [2021-07-13 20:45:40,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:45:40,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:40,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:45:40,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:45:40,239 INFO L87 Difference]: Start difference. First operand 2936 states and 10202 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 20:45:41,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:41,183 INFO L93 Difference]: Finished difference Result 6217 states and 19611 transitions. [2021-07-13 20:45:41,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-13 20:45:41,183 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 28 [2021-07-13 20:45:41,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:41,193 INFO L225 Difference]: With dead ends: 6217 [2021-07-13 20:45:41,194 INFO L226 Difference]: Without dead ends: 6213 [2021-07-13 20:45:41,194 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 574.5ms TimeCoverageRelationStatistics Valid=914, Invalid=3508, Unknown=0, NotChecked=0, Total=4422 [2021-07-13 20:45:41,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6213 states. [2021-07-13 20:45:41,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6213 to 2862. [2021-07-13 20:45:41,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2862 states, 2861 states have (on average 3.471513456833275) internal successors, (9932), 2861 states have internal predecessors, (9932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:41,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2862 states to 2862 states and 9932 transitions. [2021-07-13 20:45:41,299 INFO L78 Accepts]: Start accepts. Automaton has 2862 states and 9932 transitions. Word has length 28 [2021-07-13 20:45:41,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:41,299 INFO L482 AbstractCegarLoop]: Abstraction has 2862 states and 9932 transitions. [2021-07-13 20:45:41,299 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 20:45:41,299 INFO L276 IsEmpty]: Start isEmpty. Operand 2862 states and 9932 transitions. [2021-07-13 20:45:41,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:41,303 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:41,303 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 20:45:41,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3539 [2021-07-13 20:45:41,518 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:41,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:41,519 INFO L82 PathProgramCache]: Analyzing trace with hash 193360559, now seen corresponding path program 68 times [2021-07-13 20:45:41,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:41,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203154420] [2021-07-13 20:45:41,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:41,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:41,554 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 20:45:41,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:41,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203154420] [2021-07-13 20:45:41,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203154420] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:41,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331093471] [2021-07-13 20:45:41,554 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 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 20:45:41,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:45:41,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:41,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:41,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:41,642 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 20:45:41,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331093471] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:41,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:41,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 20:45:41,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110757828] [2021-07-13 20:45:41,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:45:41,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:41,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:45:41,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:45:41,643 INFO L87 Difference]: Start difference. First operand 2862 states and 9932 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 20:45:42,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:42,136 INFO L93 Difference]: Finished difference Result 5353 states and 17165 transitions. [2021-07-13 20:45:42,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:45:42,137 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 20:45:42,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:42,147 INFO L225 Difference]: With dead ends: 5353 [2021-07-13 20:45:42,147 INFO L226 Difference]: Without dead ends: 5353 [2021-07-13 20:45:42,147 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 274.1ms TimeCoverageRelationStatistics Valid=407, Invalid=1399, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:45:42,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5353 states. [2021-07-13 20:45:42,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5353 to 2862. [2021-07-13 20:45:42,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2862 states, 2861 states have (on average 3.473610625655365) internal successors, (9938), 2861 states have internal predecessors, (9938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:42,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2862 states to 2862 states and 9938 transitions. [2021-07-13 20:45:42,204 INFO L78 Accepts]: Start accepts. Automaton has 2862 states and 9938 transitions. Word has length 28 [2021-07-13 20:45:42,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:42,205 INFO L482 AbstractCegarLoop]: Abstraction has 2862 states and 9938 transitions. [2021-07-13 20:45:42,205 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 20:45:42,205 INFO L276 IsEmpty]: Start isEmpty. Operand 2862 states and 9938 transitions. [2021-07-13 20:45:42,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:42,209 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:42,209 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 20:45:42,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3540 [2021-07-13 20:45:42,424 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:42,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:42,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1418439203, now seen corresponding path program 69 times [2021-07-13 20:45:42,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:42,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277488331] [2021-07-13 20:45:42,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:42,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:42,458 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 20:45:42,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:42,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277488331] [2021-07-13 20:45:42,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277488331] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:42,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654266806] [2021-07-13 20:45:42,459 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 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 20:45:42,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:45:42,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:42,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:42,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:42,545 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 20:45:42,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654266806] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:42,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:42,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 20:45:42,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410135687] [2021-07-13 20:45:42,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:45:42,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:42,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:45:42,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:45:42,546 INFO L87 Difference]: Start difference. First operand 2862 states and 9938 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 20:45:43,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:43,277 INFO L93 Difference]: Finished difference Result 5672 states and 18078 transitions. [2021-07-13 20:45:43,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 20:45:43,277 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 20:45:43,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:43,287 INFO L225 Difference]: With dead ends: 5672 [2021-07-13 20:45:43,287 INFO L226 Difference]: Without dead ends: 5672 [2021-07-13 20:45:43,288 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 375.8ms TimeCoverageRelationStatistics Valid=638, Invalid=2118, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 20:45:43,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5672 states. [2021-07-13 20:45:43,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5672 to 2853. [2021-07-13 20:45:43,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2853 states, 2852 states have (on average 3.473702664796634) internal successors, (9907), 2852 states have internal predecessors, (9907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:43,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2853 states to 2853 states and 9907 transitions. [2021-07-13 20:45:43,349 INFO L78 Accepts]: Start accepts. Automaton has 2853 states and 9907 transitions. Word has length 28 [2021-07-13 20:45:43,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:43,349 INFO L482 AbstractCegarLoop]: Abstraction has 2853 states and 9907 transitions. [2021-07-13 20:45:43,349 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 20:45:43,349 INFO L276 IsEmpty]: Start isEmpty. Operand 2853 states and 9907 transitions. [2021-07-13 20:45:43,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:43,353 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:43,353 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 20:45:43,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3541,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:43,569 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:43,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:43,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1649978851, now seen corresponding path program 70 times [2021-07-13 20:45:43,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:43,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411111278] [2021-07-13 20:45:43,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:43,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:43,605 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 20:45:43,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:43,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411111278] [2021-07-13 20:45:43,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411111278] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:43,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317287164] [2021-07-13 20:45:43,606 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 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 20:45:43,628 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:45:43,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:43,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:43,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:43,701 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 20:45:43,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317287164] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:43,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:43,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 20:45:43,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163463100] [2021-07-13 20:45:43,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:45:43,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:43,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:45:43,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:45:43,702 INFO L87 Difference]: Start difference. First operand 2853 states and 9907 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 20:45:44,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:44,527 INFO L93 Difference]: Finished difference Result 6160 states and 19384 transitions. [2021-07-13 20:45:44,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-07-13 20:45:44,527 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 20:45:44,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:44,540 INFO L225 Difference]: With dead ends: 6160 [2021-07-13 20:45:44,540 INFO L226 Difference]: Without dead ends: 6160 [2021-07-13 20:45:44,540 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1318 ImplicationChecksByTransitivity, 479.8ms TimeCoverageRelationStatistics Valid=777, Invalid=3005, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 20:45:44,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6160 states. [2021-07-13 20:45:44,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6160 to 2913. [2021-07-13 20:45:44,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2913 states, 2912 states have (on average 3.4701236263736264) internal successors, (10105), 2912 states have internal predecessors, (10105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:44,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2913 states to 2913 states and 10105 transitions. [2021-07-13 20:45:44,611 INFO L78 Accepts]: Start accepts. Automaton has 2913 states and 10105 transitions. Word has length 28 [2021-07-13 20:45:44,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:44,611 INFO L482 AbstractCegarLoop]: Abstraction has 2913 states and 10105 transitions. [2021-07-13 20:45:44,611 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 20:45:44,611 INFO L276 IsEmpty]: Start isEmpty. Operand 2913 states and 10105 transitions. [2021-07-13 20:45:44,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:44,615 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:44,615 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 20:45:44,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3542,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:44,830 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:44,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:44,830 INFO L82 PathProgramCache]: Analyzing trace with hash 707808605, now seen corresponding path program 71 times [2021-07-13 20:45:44,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:44,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016522918] [2021-07-13 20:45:44,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:44,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:44,860 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 20:45:44,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:44,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016522918] [2021-07-13 20:45:44,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016522918] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:44,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498692006] [2021-07-13 20:45:44,861 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 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 20:45:44,885 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:45:44,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:44,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:44,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:44,979 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 20:45:44,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498692006] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:44,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:44,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-07-13 20:45:44,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938227426] [2021-07-13 20:45:44,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:45:44,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:44,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:45:44,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:45:44,980 INFO L87 Difference]: Start difference. First operand 2913 states and 10105 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 20:45:45,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:45,539 INFO L93 Difference]: Finished difference Result 6832 states and 22884 transitions. [2021-07-13 20:45:45,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:45:45,539 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 20:45:45,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:45,552 INFO L225 Difference]: With dead ends: 6832 [2021-07-13 20:45:45,553 INFO L226 Difference]: Without dead ends: 6832 [2021-07-13 20:45:45,553 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 363.1ms TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:45:45,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6832 states. [2021-07-13 20:45:45,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6832 to 4173. [2021-07-13 20:45:45,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4173 states, 4172 states have (on average 3.5884467881112174) internal successors, (14971), 4172 states have internal predecessors, (14971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:45,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4173 states to 4173 states and 14971 transitions. [2021-07-13 20:45:45,640 INFO L78 Accepts]: Start accepts. Automaton has 4173 states and 14971 transitions. Word has length 28 [2021-07-13 20:45:45,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:45,640 INFO L482 AbstractCegarLoop]: Abstraction has 4173 states and 14971 transitions. [2021-07-13 20:45:45,640 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 20:45:45,640 INFO L276 IsEmpty]: Start isEmpty. Operand 4173 states and 14971 transitions. [2021-07-13 20:45:45,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:45,646 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:45,646 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 20:45:45,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3543,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:45,862 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:45,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:45,862 INFO L82 PathProgramCache]: Analyzing trace with hash -703859107, now seen corresponding path program 72 times [2021-07-13 20:45:45,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:45,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493446994] [2021-07-13 20:45:45,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:45,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:45,899 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 20:45:45,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:45,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493446994] [2021-07-13 20:45:45,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493446994] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:45,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963425115] [2021-07-13 20:45:45,899 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 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 20:45:45,922 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:45:45,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:45,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:45,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:45,984 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 20:45:45,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963425115] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:45,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:45,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 20:45:45,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755620326] [2021-07-13 20:45:45,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:45:45,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:45,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:45:45,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:45:45,985 INFO L87 Difference]: Start difference. First operand 4173 states and 14971 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 20:45:46,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:46,751 INFO L93 Difference]: Finished difference Result 7512 states and 25338 transitions. [2021-07-13 20:45:46,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-13 20:45:46,751 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 20:45:46,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:46,768 INFO L225 Difference]: With dead ends: 7512 [2021-07-13 20:45:46,768 INFO L226 Difference]: Without dead ends: 7508 [2021-07-13 20:45:46,768 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 436.4ms TimeCoverageRelationStatistics Valid=697, Invalid=2495, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:45:46,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7508 states. [2021-07-13 20:45:46,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7508 to 4065. [2021-07-13 20:45:46,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4065 states, 4064 states have (on average 3.597194881889764) internal successors, (14619), 4064 states have internal predecessors, (14619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:46,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4065 states to 4065 states and 14619 transitions. [2021-07-13 20:45:46,867 INFO L78 Accepts]: Start accepts. Automaton has 4065 states and 14619 transitions. Word has length 28 [2021-07-13 20:45:46,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:46,867 INFO L482 AbstractCegarLoop]: Abstraction has 4065 states and 14619 transitions. [2021-07-13 20:45:46,867 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 20:45:46,867 INFO L276 IsEmpty]: Start isEmpty. Operand 4065 states and 14619 transitions. [2021-07-13 20:45:46,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:46,874 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:46,874 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 20:45:47,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3544,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:47,090 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:47,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:47,090 INFO L82 PathProgramCache]: Analyzing trace with hash 325457475, now seen corresponding path program 82 times [2021-07-13 20:45:47,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:47,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319775407] [2021-07-13 20:45:47,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:47,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:47,115 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 20:45:47,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:47,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319775407] [2021-07-13 20:45:47,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319775407] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:47,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577835635] [2021-07-13 20:45:47,115 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:47,139 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:45:47,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:47,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:45:47,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:47,225 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 20:45:47,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577835635] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:47,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:47,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-13 20:45:47,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722935612] [2021-07-13 20:45:47,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:45:47,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:47,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:45:47,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:45:47,226 INFO L87 Difference]: Start difference. First operand 4065 states and 14619 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 20:45:48,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:48,057 INFO L93 Difference]: Finished difference Result 8298 states and 27746 transitions. [2021-07-13 20:45:48,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 20:45:48,058 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 20:45:48,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:48,075 INFO L225 Difference]: With dead ends: 8298 [2021-07-13 20:45:48,075 INFO L226 Difference]: Without dead ends: 8289 [2021-07-13 20:45:48,075 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 450.5ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:45:48,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8289 states. [2021-07-13 20:45:48,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8289 to 4502. [2021-07-13 20:45:48,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4502 states, 4501 states have (on average 3.688735836480782) internal successors, (16603), 4501 states have internal predecessors, (16603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:48,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4502 states to 4502 states and 16603 transitions. [2021-07-13 20:45:48,186 INFO L78 Accepts]: Start accepts. Automaton has 4502 states and 16603 transitions. Word has length 28 [2021-07-13 20:45:48,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:48,186 INFO L482 AbstractCegarLoop]: Abstraction has 4502 states and 16603 transitions. [2021-07-13 20:45:48,186 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 20:45:48,186 INFO L276 IsEmpty]: Start isEmpty. Operand 4502 states and 16603 transitions. [2021-07-13 20:45:48,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:48,193 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:48,193 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 20:45:48,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3545,155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:48,408 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:48,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:48,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1928168421, now seen corresponding path program 83 times [2021-07-13 20:45:48,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:48,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197065171] [2021-07-13 20:45:48,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:48,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:48,433 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 20:45:48,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:48,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197065171] [2021-07-13 20:45:48,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197065171] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:48,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573860948] [2021-07-13 20:45:48,434 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:48,465 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:45:48,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:48,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:45:48,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:48,595 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 20:45:48,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573860948] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:48,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:48,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-13 20:45:48,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394260661] [2021-07-13 20:45:48,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:45:48,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:48,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:45:48,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:45:48,596 INFO L87 Difference]: Start difference. First operand 4502 states and 16603 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 20:45:49,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:49,459 INFO L93 Difference]: Finished difference Result 8567 states and 28576 transitions. [2021-07-13 20:45:49,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 20:45:49,459 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 20:45:49,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:49,476 INFO L225 Difference]: With dead ends: 8567 [2021-07-13 20:45:49,476 INFO L226 Difference]: Without dead ends: 8567 [2021-07-13 20:45:49,476 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 475.7ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:45:49,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8567 states. [2021-07-13 20:45:49,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8567 to 4520. [2021-07-13 20:45:49,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4520 states, 4519 states have (on average 3.677362248285019) internal successors, (16618), 4519 states have internal predecessors, (16618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:49,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4520 states to 4520 states and 16618 transitions. [2021-07-13 20:45:49,587 INFO L78 Accepts]: Start accepts. Automaton has 4520 states and 16618 transitions. Word has length 28 [2021-07-13 20:45:49,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:49,587 INFO L482 AbstractCegarLoop]: Abstraction has 4520 states and 16618 transitions. [2021-07-13 20:45:49,587 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 20:45:49,587 INFO L276 IsEmpty]: Start isEmpty. Operand 4520 states and 16618 transitions. [2021-07-13 20:45:49,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:49,594 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:49,594 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 20:45:49,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3546,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:49,809 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:49,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:49,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1163392585, now seen corresponding path program 84 times [2021-07-13 20:45:49,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:49,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505391412] [2021-07-13 20:45:49,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:49,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:49,839 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 20:45:49,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:49,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505391412] [2021-07-13 20:45:49,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505391412] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:49,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442124142] [2021-07-13 20:45:49,839 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:49,863 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:45:49,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:49,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:45:49,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:49,922 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 20:45:49,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442124142] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:49,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:49,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:45:49,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53345599] [2021-07-13 20:45:49,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:45:49,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:49,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:45:49,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:45:49,923 INFO L87 Difference]: Start difference. First operand 4520 states and 16618 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 20:45:50,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:50,327 INFO L93 Difference]: Finished difference Result 8001 states and 28114 transitions. [2021-07-13 20:45:50,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:45:50,327 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 20:45:50,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:50,344 INFO L225 Difference]: With dead ends: 8001 [2021-07-13 20:45:50,344 INFO L226 Difference]: Without dead ends: 7918 [2021-07-13 20:45:50,345 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 223.9ms TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:45:50,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7918 states. [2021-07-13 20:45:50,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7918 to 5964. [2021-07-13 20:45:50,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5964 states, 5963 states have (on average 3.7450947509642796) internal successors, (22332), 5963 states have internal predecessors, (22332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:50,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5964 states to 5964 states and 22332 transitions. [2021-07-13 20:45:50,465 INFO L78 Accepts]: Start accepts. Automaton has 5964 states and 22332 transitions. Word has length 28 [2021-07-13 20:45:50,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:50,465 INFO L482 AbstractCegarLoop]: Abstraction has 5964 states and 22332 transitions. [2021-07-13 20:45:50,465 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 20:45:50,465 INFO L276 IsEmpty]: Start isEmpty. Operand 5964 states and 22332 transitions. [2021-07-13 20:45:50,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:50,475 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:50,475 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 20:45:50,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3547,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:50,675 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:50,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:50,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1923559731, now seen corresponding path program 85 times [2021-07-13 20:45:50,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:50,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189112921] [2021-07-13 20:45:50,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:50,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:50,698 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 20:45:50,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:50,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189112921] [2021-07-13 20:45:50,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189112921] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:50,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347862430] [2021-07-13 20:45:50,698 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:50,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:50,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:45:50,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:50,762 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 20:45:50,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347862430] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:50,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:50,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-07-13 20:45:50,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919054093] [2021-07-13 20:45:50,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:45:50,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:50,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:45:50,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:45:50,763 INFO L87 Difference]: Start difference. First operand 5964 states and 22332 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 20:45:50,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:50,920 INFO L93 Difference]: Finished difference Result 8265 states and 28982 transitions. [2021-07-13 20:45:50,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:45:50,920 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 20:45:50,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:50,938 INFO L225 Difference]: With dead ends: 8265 [2021-07-13 20:45:50,938 INFO L226 Difference]: Without dead ends: 8265 [2021-07-13 20:45:50,938 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 92.9ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:45:50,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8265 states. [2021-07-13 20:45:51,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8265 to 6071. [2021-07-13 20:45:51,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6071 states, 6070 states have (on average 3.7255354200988466) internal successors, (22614), 6070 states have internal predecessors, (22614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:51,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6071 states to 6071 states and 22614 transitions. [2021-07-13 20:45:51,109 INFO L78 Accepts]: Start accepts. Automaton has 6071 states and 22614 transitions. Word has length 28 [2021-07-13 20:45:51,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:51,109 INFO L482 AbstractCegarLoop]: Abstraction has 6071 states and 22614 transitions. [2021-07-13 20:45:51,109 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 20:45:51,109 INFO L276 IsEmpty]: Start isEmpty. Operand 6071 states and 22614 transitions. [2021-07-13 20:45:51,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:51,119 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:51,119 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 20:45:51,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3548,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:51,334 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:51,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:51,334 INFO L82 PathProgramCache]: Analyzing trace with hash -993359987, now seen corresponding path program 86 times [2021-07-13 20:45:51,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:51,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638434267] [2021-07-13 20:45:51,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:51,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:51,372 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 20:45:51,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:51,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638434267] [2021-07-13 20:45:51,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638434267] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:51,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055667666] [2021-07-13 20:45:51,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:51,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:45:51,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:51,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:51,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:51,460 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 20:45:51,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055667666] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:51,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:51,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-07-13 20:45:51,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967009597] [2021-07-13 20:45:51,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:45:51,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:51,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:45:51,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:45:51,461 INFO L87 Difference]: Start difference. First operand 6071 states and 22614 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 20:45:52,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:52,164 INFO L93 Difference]: Finished difference Result 12605 states and 43798 transitions. [2021-07-13 20:45:52,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-13 20:45:52,164 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 20:45:52,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:52,193 INFO L225 Difference]: With dead ends: 12605 [2021-07-13 20:45:52,193 INFO L226 Difference]: Without dead ends: 12605 [2021-07-13 20:45:52,193 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 404.8ms TimeCoverageRelationStatistics Valid=657, Invalid=2205, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:45:52,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12605 states. [2021-07-13 20:45:52,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12605 to 6726. [2021-07-13 20:45:52,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6726 states, 6725 states have (on average 3.7414126394052043) internal successors, (25161), 6725 states have internal predecessors, (25161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:52,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6726 states to 6726 states and 25161 transitions. [2021-07-13 20:45:52,367 INFO L78 Accepts]: Start accepts. Automaton has 6726 states and 25161 transitions. Word has length 28 [2021-07-13 20:45:52,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:52,368 INFO L482 AbstractCegarLoop]: Abstraction has 6726 states and 25161 transitions. [2021-07-13 20:45:52,368 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 20:45:52,368 INFO L276 IsEmpty]: Start isEmpty. Operand 6726 states and 25161 transitions. [2021-07-13 20:45:52,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:52,379 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:52,379 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 20:45:52,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3549 [2021-07-13 20:45:52,594 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:52,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:52,594 INFO L82 PathProgramCache]: Analyzing trace with hash 909319465, now seen corresponding path program 87 times [2021-07-13 20:45:52,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:52,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812706382] [2021-07-13 20:45:52,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:52,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:52,626 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 20:45:52,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:52,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812706382] [2021-07-13 20:45:52,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812706382] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:52,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480993635] [2021-07-13 20:45:52,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:45:52,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:45:52,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:52,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:52,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:52,787 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 20:45:52,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480993635] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:52,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:52,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-07-13 20:45:52,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164461918] [2021-07-13 20:45:52,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:45:52,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:52,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:45:52,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:45:52,788 INFO L87 Difference]: Start difference. First operand 6726 states and 25161 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 20:45:53,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:53,415 INFO L93 Difference]: Finished difference Result 12718 states and 44233 transitions. [2021-07-13 20:45:53,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 20:45:53,416 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 20:45:53,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:53,446 INFO L225 Difference]: With dead ends: 12718 [2021-07-13 20:45:53,446 INFO L226 Difference]: Without dead ends: 12718 [2021-07-13 20:45:53,447 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 422.5ms TimeCoverageRelationStatistics Valid=542, Invalid=1908, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:45:53,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12718 states. [2021-07-13 20:45:53,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12718 to 6962. [2021-07-13 20:45:53,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6962 states, 6961 states have (on average 3.7214480678063495) internal successors, (25905), 6961 states have internal predecessors, (25905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:53,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6962 states to 6962 states and 25905 transitions. [2021-07-13 20:45:53,638 INFO L78 Accepts]: Start accepts. Automaton has 6962 states and 25905 transitions. Word has length 28 [2021-07-13 20:45:53,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:53,638 INFO L482 AbstractCegarLoop]: Abstraction has 6962 states and 25905 transitions. [2021-07-13 20:45:53,639 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 20:45:53,639 INFO L276 IsEmpty]: Start isEmpty. Operand 6962 states and 25905 transitions. [2021-07-13 20:45:53,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:53,651 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:53,652 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 20:45:53,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3550 [2021-07-13 20:45:53,868 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:53,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:53,868 INFO L82 PathProgramCache]: Analyzing trace with hash -173703191, now seen corresponding path program 88 times [2021-07-13 20:45:53,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:53,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987087407] [2021-07-13 20:45:53,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:53,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:53,892 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 20:45:53,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:53,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987087407] [2021-07-13 20:45:53,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987087407] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:53,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260918282] [2021-07-13 20:45:53,892 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:53,919 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:45:53,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:53,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:45:53,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:53,969 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 20:45:53,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260918282] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:53,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:53,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:45:53,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772022091] [2021-07-13 20:45:53,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:45:53,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:53,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:45:53,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:45:53,970 INFO L87 Difference]: Start difference. First operand 6962 states and 25905 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 20:45:54,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:54,300 INFO L93 Difference]: Finished difference Result 9470 states and 33921 transitions. [2021-07-13 20:45:54,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:45:54,300 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 20:45:54,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:54,391 INFO L225 Difference]: With dead ends: 9470 [2021-07-13 20:45:54,391 INFO L226 Difference]: Without dead ends: 9440 [2021-07-13 20:45:54,392 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 166.4ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:45:54,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9440 states. [2021-07-13 20:45:54,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9440 to 7814. [2021-07-13 20:45:54,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7814 states, 7813 states have (on average 3.749904006143607) internal successors, (29298), 7813 states have internal predecessors, (29298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:54,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7814 states to 7814 states and 29298 transitions. [2021-07-13 20:45:54,572 INFO L78 Accepts]: Start accepts. Automaton has 7814 states and 29298 transitions. Word has length 28 [2021-07-13 20:45:54,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:54,572 INFO L482 AbstractCegarLoop]: Abstraction has 7814 states and 29298 transitions. [2021-07-13 20:45:54,573 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 20:45:54,573 INFO L276 IsEmpty]: Start isEmpty. Operand 7814 states and 29298 transitions. [2021-07-13 20:45:54,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:54,586 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:54,586 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 20:45:54,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3551 [2021-07-13 20:45:54,803 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:54,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:54,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1297374927, now seen corresponding path program 89 times [2021-07-13 20:45:54,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:54,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754563909] [2021-07-13 20:45:54,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:54,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:54,830 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 20:45:54,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:54,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754563909] [2021-07-13 20:45:54,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754563909] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:54,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157476593] [2021-07-13 20:45:54,831 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:54,862 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:45:54,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:54,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:45:54,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:54,923 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 20:45:54,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157476593] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:54,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:54,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:45:54,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504767973] [2021-07-13 20:45:54,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:45:54,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:54,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:45:54,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:45:54,924 INFO L87 Difference]: Start difference. First operand 7814 states and 29298 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 20:45:55,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:55,263 INFO L93 Difference]: Finished difference Result 10065 states and 35894 transitions. [2021-07-13 20:45:55,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:45:55,264 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 20:45:55,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:55,286 INFO L225 Difference]: With dead ends: 10065 [2021-07-13 20:45:55,286 INFO L226 Difference]: Without dead ends: 10065 [2021-07-13 20:45:55,287 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 176.9ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:45:55,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10065 states. [2021-07-13 20:45:55,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10065 to 7854. [2021-07-13 20:45:55,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7854 states, 7853 states have (on average 3.7459569591239017) internal successors, (29417), 7853 states have internal predecessors, (29417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:55,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7854 states to 7854 states and 29417 transitions. [2021-07-13 20:45:55,455 INFO L78 Accepts]: Start accepts. Automaton has 7854 states and 29417 transitions. Word has length 28 [2021-07-13 20:45:55,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:55,455 INFO L482 AbstractCegarLoop]: Abstraction has 7854 states and 29417 transitions. [2021-07-13 20:45:55,455 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 20:45:55,455 INFO L276 IsEmpty]: Start isEmpty. Operand 7854 states and 29417 transitions. [2021-07-13 20:45:55,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:55,469 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:55,469 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 20:45:55,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3552,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:55,684 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:55,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:55,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1855439209, now seen corresponding path program 90 times [2021-07-13 20:45:55,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:55,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107939979] [2021-07-13 20:45:55,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:55,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:55,713 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 20:45:55,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:55,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107939979] [2021-07-13 20:45:55,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107939979] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:55,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264987192] [2021-07-13 20:45:55,713 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:55,737 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:45:55,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:55,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:55,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:55,793 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 20:45:55,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264987192] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:55,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:55,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-07-13 20:45:55,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152606792] [2021-07-13 20:45:55,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:45:55,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:55,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:45:55,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:45:55,794 INFO L87 Difference]: Start difference. First operand 7854 states and 29417 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 20:45:56,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:56,461 INFO L93 Difference]: Finished difference Result 13425 states and 47598 transitions. [2021-07-13 20:45:56,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:45:56,461 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 20:45:56,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:56,502 INFO L225 Difference]: With dead ends: 13425 [2021-07-13 20:45:56,502 INFO L226 Difference]: Without dead ends: 13421 [2021-07-13 20:45:56,502 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 308.8ms TimeCoverageRelationStatistics Valid=474, Invalid=1596, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:45:56,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13421 states. [2021-07-13 20:45:56,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13421 to 7752. [2021-07-13 20:45:56,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7752 states, 7751 states have (on average 3.7497097148755) internal successors, (29064), 7751 states have internal predecessors, (29064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:56,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7752 states to 7752 states and 29064 transitions. [2021-07-13 20:45:56,704 INFO L78 Accepts]: Start accepts. Automaton has 7752 states and 29064 transitions. Word has length 28 [2021-07-13 20:45:56,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:56,704 INFO L482 AbstractCegarLoop]: Abstraction has 7752 states and 29064 transitions. [2021-07-13 20:45:56,704 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 20:45:56,704 INFO L276 IsEmpty]: Start isEmpty. Operand 7752 states and 29064 transitions. [2021-07-13 20:45:56,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:56,716 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:56,716 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 20:45:56,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3553,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:56,931 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:56,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:56,931 INFO L82 PathProgramCache]: Analyzing trace with hash 812772317, now seen corresponding path program 91 times [2021-07-13 20:45:56,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:56,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211945582] [2021-07-13 20:45:56,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:56,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:56,960 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 20:45:56,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:56,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211945582] [2021-07-13 20:45:56,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211945582] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:56,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680197274] [2021-07-13 20:45:56,961 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:56,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:56,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:45:56,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:57,044 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 20:45:57,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680197274] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:57,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:57,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:45:57,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259602193] [2021-07-13 20:45:57,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:45:57,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:57,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:45:57,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:45:57,045 INFO L87 Difference]: Start difference. First operand 7752 states and 29064 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 20:45:57,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:57,472 INFO L93 Difference]: Finished difference Result 10276 states and 36673 transitions. [2021-07-13 20:45:57,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:45:57,472 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 20:45:57,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:57,495 INFO L225 Difference]: With dead ends: 10276 [2021-07-13 20:45:57,496 INFO L226 Difference]: Without dead ends: 10276 [2021-07-13 20:45:57,496 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 220.8ms TimeCoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:45:57,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10276 states. [2021-07-13 20:45:57,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10276 to 7683. [2021-07-13 20:45:57,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7683 states, 7682 states have (on average 3.743686539963551) internal successors, (28759), 7682 states have internal predecessors, (28759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:57,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7683 states to 7683 states and 28759 transitions. [2021-07-13 20:45:57,659 INFO L78 Accepts]: Start accepts. Automaton has 7683 states and 28759 transitions. Word has length 28 [2021-07-13 20:45:57,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:57,659 INFO L482 AbstractCegarLoop]: Abstraction has 7683 states and 28759 transitions. [2021-07-13 20:45:57,659 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 20:45:57,659 INFO L276 IsEmpty]: Start isEmpty. Operand 7683 states and 28759 transitions. [2021-07-13 20:45:57,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:57,672 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:57,672 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 20:45:57,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3554 [2021-07-13 20:45:57,887 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:57,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:57,887 INFO L82 PathProgramCache]: Analyzing trace with hash 933737069, now seen corresponding path program 92 times [2021-07-13 20:45:57,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:57,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605412371] [2021-07-13 20:45:57,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:57,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:57,923 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 20:45:57,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:57,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605412371] [2021-07-13 20:45:57,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605412371] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:57,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986165807] [2021-07-13 20:45:57,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:57,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:45:57,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:57,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:57,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:58,005 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 20:45:58,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986165807] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:58,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:58,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-07-13 20:45:58,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030936789] [2021-07-13 20:45:58,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:45:58,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:58,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:45:58,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:45:58,006 INFO L87 Difference]: Start difference. First operand 7683 states and 28759 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 20:45:58,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:58,699 INFO L93 Difference]: Finished difference Result 13291 states and 47039 transitions. [2021-07-13 20:45:58,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 20:45:58,700 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 20:45:58,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:58,737 INFO L225 Difference]: With dead ends: 13291 [2021-07-13 20:45:58,737 INFO L226 Difference]: Without dead ends: 13279 [2021-07-13 20:45:58,738 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 380.2ms TimeCoverageRelationStatistics Valid=564, Invalid=1986, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:45:58,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13279 states. [2021-07-13 20:45:58,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13279 to 7683. [2021-07-13 20:45:58,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7683 states, 7682 states have (on average 3.7431658422285863) internal successors, (28755), 7682 states have internal predecessors, (28755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:58,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7683 states to 7683 states and 28755 transitions. [2021-07-13 20:45:58,947 INFO L78 Accepts]: Start accepts. Automaton has 7683 states and 28755 transitions. Word has length 28 [2021-07-13 20:45:58,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:58,947 INFO L482 AbstractCegarLoop]: Abstraction has 7683 states and 28755 transitions. [2021-07-13 20:45:58,947 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 20:45:58,947 INFO L276 IsEmpty]: Start isEmpty. Operand 7683 states and 28755 transitions. [2021-07-13 20:45:58,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:58,959 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:58,960 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 20:45:59,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3555,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:59,175 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:59,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:59,175 INFO L82 PathProgramCache]: Analyzing trace with hash -306445935, now seen corresponding path program 93 times [2021-07-13 20:45:59,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:59,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963868510] [2021-07-13 20:45:59,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:59,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:59,212 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 20:45:59,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:59,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963868510] [2021-07-13 20:45:59,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963868510] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:59,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537155077] [2021-07-13 20:45:59,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:59,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:45:59,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:59,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:59,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:59,301 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 20:45:59,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537155077] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:59,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:59,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-13 20:45:59,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738934367] [2021-07-13 20:45:59,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:45:59,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:59,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:45:59,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:45:59,302 INFO L87 Difference]: Start difference. First operand 7683 states and 28755 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 20:46:00,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:00,385 INFO L93 Difference]: Finished difference Result 20069 states and 69965 transitions. [2021-07-13 20:46:00,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-07-13 20:46:00,385 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 20:46:00,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:00,444 INFO L225 Difference]: With dead ends: 20069 [2021-07-13 20:46:00,444 INFO L226 Difference]: Without dead ends: 20069 [2021-07-13 20:46:00,445 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 635.4ms TimeCoverageRelationStatistics Valid=1218, Invalid=4482, Unknown=0, NotChecked=0, Total=5700 [2021-07-13 20:46:00,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20069 states. [2021-07-13 20:46:00,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20069 to 10444. [2021-07-13 20:46:00,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10444 states, 10443 states have (on average 3.790577420281528) internal successors, (39585), 10443 states have internal predecessors, (39585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:00,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10444 states to 10444 states and 39585 transitions. [2021-07-13 20:46:00,846 INFO L78 Accepts]: Start accepts. Automaton has 10444 states and 39585 transitions. Word has length 28 [2021-07-13 20:46:00,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:00,846 INFO L482 AbstractCegarLoop]: Abstraction has 10444 states and 39585 transitions. [2021-07-13 20:46:00,847 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 20:46:00,847 INFO L276 IsEmpty]: Start isEmpty. Operand 10444 states and 39585 transitions. [2021-07-13 20:46:00,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:46:00,865 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:00,865 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 20:46:01,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3556,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:01,081 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:01,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:01,081 INFO L82 PathProgramCache]: Analyzing trace with hash 765871039, now seen corresponding path program 94 times [2021-07-13 20:46:01,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:01,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116235962] [2021-07-13 20:46:01,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:01,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:01,117 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 20:46:01,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:01,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116235962] [2021-07-13 20:46:01,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116235962] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:01,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066862977] [2021-07-13 20:46:01,118 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:46:01,140 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:46:01,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:01,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:46:01,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:01,207 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 20:46:01,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066862977] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:01,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:01,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-13 20:46:01,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855543868] [2021-07-13 20:46:01,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:46:01,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:01,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:46:01,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:46:01,207 INFO L87 Difference]: Start difference. First operand 10444 states and 39585 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 20:46:02,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:02,366 INFO L93 Difference]: Finished difference Result 19312 states and 67991 transitions. [2021-07-13 20:46:02,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-13 20:46:02,367 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 20:46:02,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:02,415 INFO L225 Difference]: With dead ends: 19312 [2021-07-13 20:46:02,416 INFO L226 Difference]: Without dead ends: 19300 [2021-07-13 20:46:02,416 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1736 ImplicationChecksByTransitivity, 585.2ms TimeCoverageRelationStatistics Valid=1059, Invalid=3771, Unknown=0, NotChecked=0, Total=4830 [2021-07-13 20:46:02,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19300 states. [2021-07-13 20:46:02,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19300 to 10242. [2021-07-13 20:46:02,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10242 states, 10241 states have (on average 3.799043062200957) internal successors, (38906), 10241 states have internal predecessors, (38906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:02,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10242 states to 10242 states and 38906 transitions. [2021-07-13 20:46:02,783 INFO L78 Accepts]: Start accepts. Automaton has 10242 states and 38906 transitions. Word has length 28 [2021-07-13 20:46:02,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:02,783 INFO L482 AbstractCegarLoop]: Abstraction has 10242 states and 38906 transitions. [2021-07-13 20:46:02,783 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 20:46:02,783 INFO L276 IsEmpty]: Start isEmpty. Operand 10242 states and 38906 transitions. [2021-07-13 20:46:02,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:46:02,801 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:02,801 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 20:46:03,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3557,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:03,017 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:03,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:03,017 INFO L82 PathProgramCache]: Analyzing trace with hash 2026707565, now seen corresponding path program 95 times [2021-07-13 20:46:03,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:03,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931830256] [2021-07-13 20:46:03,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:03,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:03,051 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 20:46:03,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:03,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931830256] [2021-07-13 20:46:03,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931830256] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:03,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059397523] [2021-07-13 20:46:03,051 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:03,076 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:46:03,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:03,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:46:03,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:03,131 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 20:46:03,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059397523] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:03,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:03,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-13 20:46:03,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543947876] [2021-07-13 20:46:03,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:46:03,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:03,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:46:03,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:46:03,132 INFO L87 Difference]: Start difference. First operand 10242 states and 38906 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 20:46:04,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:04,081 INFO L93 Difference]: Finished difference Result 19128 states and 67337 transitions. [2021-07-13 20:46:04,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-13 20:46:04,082 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 20:46:04,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:04,133 INFO L225 Difference]: With dead ends: 19128 [2021-07-13 20:46:04,133 INFO L226 Difference]: Without dead ends: 19092 [2021-07-13 20:46:04,134 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1449 ImplicationChecksByTransitivity, 480.1ms TimeCoverageRelationStatistics Valid=906, Invalid=3384, Unknown=0, NotChecked=0, Total=4290 [2021-07-13 20:46:04,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19092 states. [2021-07-13 20:46:04,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19092 to 10290. [2021-07-13 20:46:04,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10290 states, 10289 states have (on average 3.7970648265137528) internal successors, (39068), 10289 states have internal predecessors, (39068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:04,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10290 states to 10290 states and 39068 transitions. [2021-07-13 20:46:04,490 INFO L78 Accepts]: Start accepts. Automaton has 10290 states and 39068 transitions. Word has length 28 [2021-07-13 20:46:04,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:04,490 INFO L482 AbstractCegarLoop]: Abstraction has 10290 states and 39068 transitions. [2021-07-13 20:46:04,490 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 20:46:04,490 INFO L276 IsEmpty]: Start isEmpty. Operand 10290 states and 39068 transitions. [2021-07-13 20:46:04,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:46:04,508 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:04,508 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 20:46:04,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3558,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:04,721 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:04,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:04,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1595973395, now seen corresponding path program 96 times [2021-07-13 20:46:04,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:04,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355432502] [2021-07-13 20:46:04,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:04,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:04,759 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 20:46:04,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:04,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355432502] [2021-07-13 20:46:04,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355432502] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:04,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817793895] [2021-07-13 20:46:04,759 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:04,784 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:46:04,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:04,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:46:04,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:04,918 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 20:46:04,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817793895] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:04,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:04,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-13 20:46:04,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129873626] [2021-07-13 20:46:04,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:46:04,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:04,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:46:04,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:46:04,919 INFO L87 Difference]: Start difference. First operand 10290 states and 39068 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 20:46:06,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:06,247 INFO L93 Difference]: Finished difference Result 19050 states and 67176 transitions. [2021-07-13 20:46:06,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-07-13 20:46:06,248 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 28 [2021-07-13 20:46:06,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:06,298 INFO L225 Difference]: With dead ends: 19050 [2021-07-13 20:46:06,299 INFO L226 Difference]: Without dead ends: 19050 [2021-07-13 20:46:06,299 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2648 ImplicationChecksByTransitivity, 855.9ms TimeCoverageRelationStatistics Valid=1494, Invalid=5646, Unknown=0, NotChecked=0, Total=7140 [2021-07-13 20:46:06,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19050 states. [2021-07-13 20:46:06,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19050 to 10488. [2021-07-13 20:46:06,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10488 states, 10487 states have (on average 3.787832554591399) internal successors, (39723), 10487 states have internal predecessors, (39723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:06,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10488 states to 10488 states and 39723 transitions. [2021-07-13 20:46:06,625 INFO L78 Accepts]: Start accepts. Automaton has 10488 states and 39723 transitions. Word has length 28 [2021-07-13 20:46:06,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:06,625 INFO L482 AbstractCegarLoop]: Abstraction has 10488 states and 39723 transitions. [2021-07-13 20:46:06,625 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 20:46:06,625 INFO L276 IsEmpty]: Start isEmpty. Operand 10488 states and 39723 transitions. [2021-07-13 20:46:06,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:46:06,643 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:06,643 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 20:46:06,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3559 [2021-07-13 20:46:06,857 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:06,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:06,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1643616507, now seen corresponding path program 97 times [2021-07-13 20:46:06,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:06,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831916454] [2021-07-13 20:46:06,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:06,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:06,891 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 20:46:06,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:06,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831916454] [2021-07-13 20:46:06,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831916454] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:06,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693993990] [2021-07-13 20:46:06,891 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:06,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:06,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:46:06,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:07,018 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 20:46:07,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693993990] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:07,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:07,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-13 20:46:07,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683989033] [2021-07-13 20:46:07,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:46:07,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:07,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:46:07,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:46:07,019 INFO L87 Difference]: Start difference. First operand 10488 states and 39723 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 20:46:08,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:08,333 INFO L93 Difference]: Finished difference Result 18660 states and 66098 transitions. [2021-07-13 20:46:08,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-13 20:46:08,334 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 28 [2021-07-13 20:46:08,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:08,379 INFO L225 Difference]: With dead ends: 18660 [2021-07-13 20:46:08,379 INFO L226 Difference]: Without dead ends: 18648 [2021-07-13 20:46:08,379 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2073 ImplicationChecksByTransitivity, 788.7ms TimeCoverageRelationStatistics Valid=1305, Invalid=4547, Unknown=0, NotChecked=0, Total=5852 [2021-07-13 20:46:08,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18648 states. [2021-07-13 20:46:08,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18648 to 10366. [2021-07-13 20:46:08,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10366 states, 10365 states have (on average 3.7916063675832126) internal successors, (39300), 10365 states have internal predecessors, (39300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:08,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10366 states to 10366 states and 39300 transitions. [2021-07-13 20:46:08,688 INFO L78 Accepts]: Start accepts. Automaton has 10366 states and 39300 transitions. Word has length 28 [2021-07-13 20:46:08,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:08,688 INFO L482 AbstractCegarLoop]: Abstraction has 10366 states and 39300 transitions. [2021-07-13 20:46:08,688 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 20:46:08,688 INFO L276 IsEmpty]: Start isEmpty. Operand 10366 states and 39300 transitions. [2021-07-13 20:46:08,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:46:08,706 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:08,706 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 20:46:08,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3560 [2021-07-13 20:46:08,911 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:08,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:08,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1168215851, now seen corresponding path program 98 times [2021-07-13 20:46:08,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:08,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108261360] [2021-07-13 20:46:08,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:08,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:08,954 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 20:46:08,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:08,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108261360] [2021-07-13 20:46:08,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108261360] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:08,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479091244] [2021-07-13 20:46:08,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:08,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:46:08,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:08,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:46:08,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:09,044 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 20:46:09,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479091244] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:09,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:09,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-07-13 20:46:09,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776212537] [2021-07-13 20:46:09,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:46:09,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:09,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:46:09,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:46:09,045 INFO L87 Difference]: Start difference. First operand 10366 states and 39300 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 20:46:10,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:10,079 INFO L93 Difference]: Finished difference Result 17898 states and 64003 transitions. [2021-07-13 20:46:10,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-13 20:46:10,080 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 20:46:10,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:10,129 INFO L225 Difference]: With dead ends: 17898 [2021-07-13 20:46:10,129 INFO L226 Difference]: Without dead ends: 17862 [2021-07-13 20:46:10,130 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1442 ImplicationChecksByTransitivity, 579.5ms TimeCoverageRelationStatistics Valid=951, Invalid=3471, Unknown=0, NotChecked=0, Total=4422 [2021-07-13 20:46:10,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17862 states. [2021-07-13 20:46:10,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17862 to 10386. [2021-07-13 20:46:10,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10386 states, 10385 states have (on average 3.7906596051998074) internal successors, (39366), 10385 states have internal predecessors, (39366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:10,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10386 states to 10386 states and 39366 transitions. [2021-07-13 20:46:10,460 INFO L78 Accepts]: Start accepts. Automaton has 10386 states and 39366 transitions. Word has length 28 [2021-07-13 20:46:10,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:10,460 INFO L482 AbstractCegarLoop]: Abstraction has 10386 states and 39366 transitions. [2021-07-13 20:46:10,461 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 20:46:10,461 INFO L276 IsEmpty]: Start isEmpty. Operand 10386 states and 39366 transitions. [2021-07-13 20:46:10,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:46:10,478 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:10,478 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 20:46:10,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3561 [2021-07-13 20:46:10,692 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:10,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:10,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1708660749, now seen corresponding path program 99 times [2021-07-13 20:46:10,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:10,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881262491] [2021-07-13 20:46:10,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:10,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:10,724 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 20:46:10,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:10,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881262491] [2021-07-13 20:46:10,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881262491] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:10,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519576134] [2021-07-13 20:46:10,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:10,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:46:10,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:10,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:46:10,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:10,857 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 20:46:10,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519576134] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:10,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:10,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:46:10,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799957775] [2021-07-13 20:46:10,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:46:10,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:10,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:46:10,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:46:10,858 INFO L87 Difference]: Start difference. First operand 10386 states and 39366 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 20:46:12,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:12,136 INFO L93 Difference]: Finished difference Result 26075 states and 92737 transitions. [2021-07-13 20:46:12,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-07-13 20:46:12,136 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 20:46:12,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:12,211 INFO L225 Difference]: With dead ends: 26075 [2021-07-13 20:46:12,211 INFO L226 Difference]: Without dead ends: 26075 [2021-07-13 20:46:12,212 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2318 ImplicationChecksByTransitivity, 747.5ms TimeCoverageRelationStatistics Valid=1326, Invalid=4680, Unknown=0, NotChecked=0, Total=6006 [2021-07-13 20:46:12,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26075 states. [2021-07-13 20:46:12,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26075 to 10692. [2021-07-13 20:46:12,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10692 states, 10691 states have (on average 3.8184454213824712) internal successors, (40823), 10691 states have internal predecessors, (40823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:12,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10692 states to 10692 states and 40823 transitions. [2021-07-13 20:46:12,726 INFO L78 Accepts]: Start accepts. Automaton has 10692 states and 40823 transitions. Word has length 28 [2021-07-13 20:46:12,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:12,726 INFO L482 AbstractCegarLoop]: Abstraction has 10692 states and 40823 transitions. [2021-07-13 20:46:12,726 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 20:46:12,727 INFO L276 IsEmpty]: Start isEmpty. Operand 10692 states and 40823 transitions. [2021-07-13 20:46:12,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:46:12,745 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:12,745 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 20:46:12,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3562 [2021-07-13 20:46:12,947 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:12,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:12,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1057401903, now seen corresponding path program 100 times [2021-07-13 20:46:12,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:12,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280101829] [2021-07-13 20:46:12,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:12,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:12,976 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 20:46:12,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:12,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280101829] [2021-07-13 20:46:12,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280101829] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:12,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88072716] [2021-07-13 20:46:12,977 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:13,001 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:46:13,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:13,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:46:13,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:13,083 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 20:46:13,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88072716] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:13,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:13,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:46:13,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320273235] [2021-07-13 20:46:13,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:46:13,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:13,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:46:13,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:46:13,084 INFO L87 Difference]: Start difference. First operand 10692 states and 40823 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 20:46:14,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:14,225 INFO L93 Difference]: Finished difference Result 25519 states and 91410 transitions. [2021-07-13 20:46:14,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-07-13 20:46:14,225 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 20:46:14,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:14,304 INFO L225 Difference]: With dead ends: 25519 [2021-07-13 20:46:14,304 INFO L226 Difference]: Without dead ends: 25519 [2021-07-13 20:46:14,305 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2286 ImplicationChecksByTransitivity, 632.2ms TimeCoverageRelationStatistics Valid=1315, Invalid=4537, Unknown=0, NotChecked=0, Total=5852 [2021-07-13 20:46:14,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25519 states. [2021-07-13 20:46:14,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25519 to 10592. [2021-07-13 20:46:14,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10592 states, 10591 states have (on average 3.8053063922198094) internal successors, (40302), 10591 states have internal predecessors, (40302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:14,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10592 states to 10592 states and 40302 transitions. [2021-07-13 20:46:14,864 INFO L78 Accepts]: Start accepts. Automaton has 10592 states and 40302 transitions. Word has length 28 [2021-07-13 20:46:14,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:14,865 INFO L482 AbstractCegarLoop]: Abstraction has 10592 states and 40302 transitions. [2021-07-13 20:46:14,865 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 20:46:14,865 INFO L276 IsEmpty]: Start isEmpty. Operand 10592 states and 40302 transitions. [2021-07-13 20:46:14,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:46:14,883 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:14,883 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 20:46:15,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3563,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:15,098 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:15,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:15,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1158271565, now seen corresponding path program 101 times [2021-07-13 20:46:15,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:15,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383182736] [2021-07-13 20:46:15,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:15,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:15,133 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 20:46:15,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:15,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383182736] [2021-07-13 20:46:15,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383182736] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:15,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793002780] [2021-07-13 20:46:15,134 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:46:15,159 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:46:15,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:15,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:46:15,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:15,257 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 20:46:15,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793002780] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:15,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:15,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-13 20:46:15,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749139819] [2021-07-13 20:46:15,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:46:15,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:15,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:46:15,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:46:15,258 INFO L87 Difference]: Start difference. First operand 10592 states and 40302 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 20:46:16,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:16,066 INFO L93 Difference]: Finished difference Result 20262 states and 72808 transitions. [2021-07-13 20:46:16,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 20:46:16,066 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 20:46:16,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:16,117 INFO L225 Difference]: With dead ends: 20262 [2021-07-13 20:46:16,118 INFO L226 Difference]: Without dead ends: 20262 [2021-07-13 20:46:16,118 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 453.2ms TimeCoverageRelationStatistics Valid=668, Invalid=2194, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:46:16,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20262 states. [2021-07-13 20:46:16,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20262 to 10601. [2021-07-13 20:46:16,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10601 states, 10600 states have (on average 3.8042452830188678) internal successors, (40325), 10600 states have internal predecessors, (40325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:16,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10601 states to 10601 states and 40325 transitions. [2021-07-13 20:46:16,427 INFO L78 Accepts]: Start accepts. Automaton has 10601 states and 40325 transitions. Word has length 28 [2021-07-13 20:46:16,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:16,427 INFO L482 AbstractCegarLoop]: Abstraction has 10601 states and 40325 transitions. [2021-07-13 20:46:16,428 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 20:46:16,428 INFO L276 IsEmpty]: Start isEmpty. Operand 10601 states and 40325 transitions. [2021-07-13 20:46:16,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:46:16,446 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:16,446 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 20:46:16,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3564,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:16,661 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:16,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:16,662 INFO L82 PathProgramCache]: Analyzing trace with hash 545777745, now seen corresponding path program 102 times [2021-07-13 20:46:16,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:16,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304741226] [2021-07-13 20:46:16,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:16,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:16,693 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 20:46:16,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:16,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304741226] [2021-07-13 20:46:16,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304741226] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:16,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023573901] [2021-07-13 20:46:16,693 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:16,724 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:46:16,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:16,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:46:16,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:16,802 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 20:46:16,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023573901] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:16,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:16,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-13 20:46:16,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135518905] [2021-07-13 20:46:16,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:46:16,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:16,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:46:16,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:46:16,803 INFO L87 Difference]: Start difference. First operand 10601 states and 40325 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 20:46:17,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:17,559 INFO L93 Difference]: Finished difference Result 18811 states and 68168 transitions. [2021-07-13 20:46:17,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-13 20:46:17,560 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 20:46:17,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:17,609 INFO L225 Difference]: With dead ends: 18811 [2021-07-13 20:46:17,609 INFO L226 Difference]: Without dead ends: 18811 [2021-07-13 20:46:17,610 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 383.0ms TimeCoverageRelationStatistics Valid=580, Invalid=1870, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:46:17,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18811 states. [2021-07-13 20:46:17,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18811 to 10613. [2021-07-13 20:46:17,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10613 states, 10612 states have (on average 3.80352431209951) internal successors, (40363), 10612 states have internal predecessors, (40363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:17,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10613 states to 10613 states and 40363 transitions. [2021-07-13 20:46:17,975 INFO L78 Accepts]: Start accepts. Automaton has 10613 states and 40363 transitions. Word has length 28 [2021-07-13 20:46:17,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:17,975 INFO L482 AbstractCegarLoop]: Abstraction has 10613 states and 40363 transitions. [2021-07-13 20:46:17,975 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 20:46:17,975 INFO L276 IsEmpty]: Start isEmpty. Operand 10613 states and 40363 transitions. [2021-07-13 20:46:17,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:46:17,994 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:17,994 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 20:46:18,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3565,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:18,209 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:18,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:18,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1430395937, now seen corresponding path program 103 times [2021-07-13 20:46:18,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:18,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584146494] [2021-07-13 20:46:18,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:18,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:18,241 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 20:46:18,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:18,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584146494] [2021-07-13 20:46:18,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584146494] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:18,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781236771] [2021-07-13 20:46:18,241 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:18,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:18,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:46:18,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:18,367 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 20:46:18,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781236771] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:18,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:18,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:46:18,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849451551] [2021-07-13 20:46:18,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:46:18,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:18,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:46:18,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:46:18,368 INFO L87 Difference]: Start difference. First operand 10613 states and 40363 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 20:46:19,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:19,480 INFO L93 Difference]: Finished difference Result 19418 states and 69911 transitions. [2021-07-13 20:46:19,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-07-13 20:46:19,480 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 28 [2021-07-13 20:46:19,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:19,533 INFO L225 Difference]: With dead ends: 19418 [2021-07-13 20:46:19,534 INFO L226 Difference]: Without dead ends: 19418 [2021-07-13 20:46:19,534 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1847 ImplicationChecksByTransitivity, 662.7ms TimeCoverageRelationStatistics Valid=1084, Invalid=4028, Unknown=0, NotChecked=0, Total=5112 [2021-07-13 20:46:19,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19418 states. [2021-07-13 20:46:19,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19418 to 10725. [2021-07-13 20:46:19,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10725 states, 10724 states have (on average 3.7958784035807533) internal successors, (40707), 10724 states have internal predecessors, (40707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:19,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10725 states to 10725 states and 40707 transitions. [2021-07-13 20:46:19,987 INFO L78 Accepts]: Start accepts. Automaton has 10725 states and 40707 transitions. Word has length 28 [2021-07-13 20:46:19,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:19,987 INFO L482 AbstractCegarLoop]: Abstraction has 10725 states and 40707 transitions. [2021-07-13 20:46:19,987 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 20:46:19,987 INFO L276 IsEmpty]: Start isEmpty. Operand 10725 states and 40707 transitions. [2021-07-13 20:46:20,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:46:20,006 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:20,006 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 20:46:20,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3566 [2021-07-13 20:46:20,213 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:20,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:20,213 INFO L82 PathProgramCache]: Analyzing trace with hash 375018543, now seen corresponding path program 104 times [2021-07-13 20:46:20,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:20,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127714559] [2021-07-13 20:46:20,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:20,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:20,242 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 20:46:20,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:20,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127714559] [2021-07-13 20:46:20,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127714559] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:20,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027835457] [2021-07-13 20:46:20,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:20,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:46:20,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:20,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:46:20,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:20,358 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 20:46:20,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027835457] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:20,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:20,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:46:20,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648999784] [2021-07-13 20:46:20,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:46:20,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:20,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:46:20,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:46:20,359 INFO L87 Difference]: Start difference. First operand 10725 states and 40707 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 20:46:21,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:21,293 INFO L93 Difference]: Finished difference Result 18990 states and 68747 transitions. [2021-07-13 20:46:21,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-13 20:46:21,293 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 28 [2021-07-13 20:46:21,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:21,341 INFO L225 Difference]: With dead ends: 18990 [2021-07-13 20:46:21,342 INFO L226 Difference]: Without dead ends: 18986 [2021-07-13 20:46:21,342 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 547.3ms TimeCoverageRelationStatistics Valid=880, Invalid=2902, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 20:46:21,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18986 states. [2021-07-13 20:46:21,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18986 to 10651. [2021-07-13 20:46:21,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10651 states, 10650 states have (on average 3.7998122065727697) internal successors, (40468), 10650 states have internal predecessors, (40468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:21,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10651 states to 10651 states and 40468 transitions. [2021-07-13 20:46:21,657 INFO L78 Accepts]: Start accepts. Automaton has 10651 states and 40468 transitions. Word has length 28 [2021-07-13 20:46:21,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:21,657 INFO L482 AbstractCegarLoop]: Abstraction has 10651 states and 40468 transitions. [2021-07-13 20:46:21,657 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 20:46:21,657 INFO L276 IsEmpty]: Start isEmpty. Operand 10651 states and 40468 transitions. [2021-07-13 20:46:21,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:46:21,675 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:21,675 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 20:46:21,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3567,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:21,889 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:21,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:21,889 INFO L82 PathProgramCache]: Analyzing trace with hash -156751667, now seen corresponding path program 105 times [2021-07-13 20:46:21,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:21,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129832810] [2021-07-13 20:46:21,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:21,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:21,923 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 20:46:21,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:21,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129832810] [2021-07-13 20:46:21,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129832810] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:21,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122578954] [2021-07-13 20:46:21,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:21,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:46:21,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:21,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:46:21,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:22,028 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 20:46:22,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122578954] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:22,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:22,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:46:22,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609037970] [2021-07-13 20:46:22,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:46:22,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:22,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:46:22,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:46:22,029 INFO L87 Difference]: Start difference. First operand 10651 states and 40468 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 20:46:23,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:23,047 INFO L93 Difference]: Finished difference Result 18417 states and 66232 transitions. [2021-07-13 20:46:23,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-13 20:46:23,047 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 20:46:23,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:23,106 INFO L225 Difference]: With dead ends: 18417 [2021-07-13 20:46:23,107 INFO L226 Difference]: Without dead ends: 18417 [2021-07-13 20:46:23,107 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 577.9ms TimeCoverageRelationStatistics Valid=1023, Invalid=3669, Unknown=0, NotChecked=0, Total=4692 [2021-07-13 20:46:23,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18417 states. [2021-07-13 20:46:23,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18417 to 10878. [2021-07-13 20:46:23,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10878 states, 10877 states have (on average 3.803070699641445) internal successors, (41366), 10877 states have internal predecessors, (41366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:23,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10878 states to 10878 states and 41366 transitions. [2021-07-13 20:46:23,398 INFO L78 Accepts]: Start accepts. Automaton has 10878 states and 41366 transitions. Word has length 28 [2021-07-13 20:46:23,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:23,398 INFO L482 AbstractCegarLoop]: Abstraction has 10878 states and 41366 transitions. [2021-07-13 20:46:23,398 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 20:46:23,398 INFO L276 IsEmpty]: Start isEmpty. Operand 10878 states and 41366 transitions. [2021-07-13 20:46:23,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:46:23,416 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:23,416 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 20:46:23,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3568 [2021-07-13 20:46:23,632 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:23,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:23,632 INFO L82 PathProgramCache]: Analyzing trace with hash -534318835, now seen corresponding path program 106 times [2021-07-13 20:46:23,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:23,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066809767] [2021-07-13 20:46:23,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:23,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:23,668 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 20:46:23,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:23,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066809767] [2021-07-13 20:46:23,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066809767] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:23,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643725065] [2021-07-13 20:46:23,668 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:46:23,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:46:23,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:23,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:46:23,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:23,778 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 20:46:23,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643725065] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:23,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:23,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:46:23,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005731996] [2021-07-13 20:46:23,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:46:23,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:23,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:46:23,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:46:23,779 INFO L87 Difference]: Start difference. First operand 10878 states and 41366 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 20:46:24,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:24,662 INFO L93 Difference]: Finished difference Result 18127 states and 65426 transitions. [2021-07-13 20:46:24,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-13 20:46:24,663 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 20:46:24,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:24,704 INFO L225 Difference]: With dead ends: 18127 [2021-07-13 20:46:24,704 INFO L226 Difference]: Without dead ends: 18115 [2021-07-13 20:46:24,705 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1428 ImplicationChecksByTransitivity, 521.8ms TimeCoverageRelationStatistics Valid=893, Invalid=3267, Unknown=0, NotChecked=0, Total=4160 [2021-07-13 20:46:24,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18115 states. [2021-07-13 20:46:24,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18115 to 10980. [2021-07-13 20:46:24,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10980 states, 10979 states have (on average 3.79715821113034) internal successors, (41689), 10979 states have internal predecessors, (41689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:25,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10980 states to 10980 states and 41689 transitions. [2021-07-13 20:46:25,099 INFO L78 Accepts]: Start accepts. Automaton has 10980 states and 41689 transitions. Word has length 28 [2021-07-13 20:46:25,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:25,099 INFO L482 AbstractCegarLoop]: Abstraction has 10980 states and 41689 transitions. [2021-07-13 20:46:25,099 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 20:46:25,099 INFO L276 IsEmpty]: Start isEmpty. Operand 10980 states and 41689 transitions. [2021-07-13 20:46:25,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:46:25,116 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:25,116 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 20:46:25,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3569,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:25,332 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:25,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:25,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1732149001, now seen corresponding path program 73 times [2021-07-13 20:46:25,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:25,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548516615] [2021-07-13 20:46:25,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:25,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:25,370 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 20:46:25,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:25,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548516615] [2021-07-13 20:46:25,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548516615] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:25,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361360092] [2021-07-13 20:46:25,370 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 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 20:46:25,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:25,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:46:25,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:25,455 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 20:46:25,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361360092] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:25,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:25,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-13 20:46:25,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115550470] [2021-07-13 20:46:25,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:46:25,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:25,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:46:25,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:46:25,457 INFO L87 Difference]: Start difference. First operand 10980 states and 41689 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 20:46:25,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:25,892 INFO L93 Difference]: Finished difference Result 15635 states and 57800 transitions. [2021-07-13 20:46:25,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:46:25,892 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 20:46:25,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:25,927 INFO L225 Difference]: With dead ends: 15635 [2021-07-13 20:46:25,927 INFO L226 Difference]: Without dead ends: 15635 [2021-07-13 20:46:25,927 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 235.0ms TimeCoverageRelationStatistics Valid=303, Invalid=887, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:46:25,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15635 states. [2021-07-13 20:46:26,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15635 to 11052. [2021-07-13 20:46:26,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11052 states, 11051 states have (on average 3.7925074653877475) internal successors, (41911), 11051 states have internal predecessors, (41911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:26,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11052 states to 11052 states and 41911 transitions. [2021-07-13 20:46:26,161 INFO L78 Accepts]: Start accepts. Automaton has 11052 states and 41911 transitions. Word has length 28 [2021-07-13 20:46:26,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:26,161 INFO L482 AbstractCegarLoop]: Abstraction has 11052 states and 41911 transitions. [2021-07-13 20:46:26,161 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 20:46:26,161 INFO L276 IsEmpty]: Start isEmpty. Operand 11052 states and 41911 transitions. [2021-07-13 20:46:26,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:46:26,178 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:26,178 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 20:46:26,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3570,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:26,394 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:26,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:26,394 INFO L82 PathProgramCache]: Analyzing trace with hash -38357591, now seen corresponding path program 74 times [2021-07-13 20:46:26,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:26,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341938158] [2021-07-13 20:46:26,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:26,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:26,425 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 20:46:26,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:26,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341938158] [2021-07-13 20:46:26,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341938158] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:26,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135679585] [2021-07-13 20:46:26,426 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 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 20:46:26,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:46:26,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:26,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:46:26,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:26,516 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 20:46:26,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135679585] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:26,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:26,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:46:26,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627531886] [2021-07-13 20:46:26,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:46:26,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:26,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:46:26,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:46:26,527 INFO L87 Difference]: Start difference. First operand 11052 states and 41911 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 20:46:27,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:27,018 INFO L93 Difference]: Finished difference Result 16589 states and 60571 transitions. [2021-07-13 20:46:27,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:46:27,018 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 20:46:27,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:27,056 INFO L225 Difference]: With dead ends: 16589 [2021-07-13 20:46:27,056 INFO L226 Difference]: Without dead ends: 16589 [2021-07-13 20:46:27,056 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 277.4ms TimeCoverageRelationStatistics Valid=390, Invalid=1332, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:46:27,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16589 states. [2021-07-13 20:46:27,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16589 to 11366. [2021-07-13 20:46:27,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11366 states, 11365 states have (on average 3.7756269247690275) internal successors, (42910), 11365 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 20:46:27,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11366 states to 11366 states and 42910 transitions. [2021-07-13 20:46:27,328 INFO L78 Accepts]: Start accepts. Automaton has 11366 states and 42910 transitions. Word has length 28 [2021-07-13 20:46:27,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:27,328 INFO L482 AbstractCegarLoop]: Abstraction has 11366 states and 42910 transitions. [2021-07-13 20:46:27,328 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 20:46:27,328 INFO L276 IsEmpty]: Start isEmpty. Operand 11366 states and 42910 transitions. [2021-07-13 20:46:27,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:46:27,414 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:27,414 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 20:46:27,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3571 [2021-07-13 20:46:27,627 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:27,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:27,628 INFO L82 PathProgramCache]: Analyzing trace with hash 907762153, now seen corresponding path program 75 times [2021-07-13 20:46:27,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:27,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127413291] [2021-07-13 20:46:27,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:27,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:27,659 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 20:46:27,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:27,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127413291] [2021-07-13 20:46:27,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127413291] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:27,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878784499] [2021-07-13 20:46:27,659 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 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 20:46:27,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:46:27,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:27,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:46:27,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:27,746 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 20:46:27,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878784499] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:27,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:27,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:46:27,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719059265] [2021-07-13 20:46:27,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:46:27,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:27,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:46:27,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:46:27,746 INFO L87 Difference]: Start difference. First operand 11366 states and 42910 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 20:46:28,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:28,168 INFO L93 Difference]: Finished difference Result 16097 states and 59284 transitions. [2021-07-13 20:46:28,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:46:28,169 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 20:46:28,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:28,208 INFO L225 Difference]: With dead ends: 16097 [2021-07-13 20:46:28,208 INFO L226 Difference]: Without dead ends: 16089 [2021-07-13 20:46:28,208 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 213.2ms TimeCoverageRelationStatistics Valid=295, Invalid=895, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:46:28,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16089 states. [2021-07-13 20:46:28,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16089 to 11306. [2021-07-13 20:46:28,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11306 states, 11305 states have (on average 3.77797434763379) internal successors, (42710), 11305 states have internal predecessors, (42710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:28,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11306 states to 11306 states and 42710 transitions. [2021-07-13 20:46:28,474 INFO L78 Accepts]: Start accepts. Automaton has 11306 states and 42710 transitions. Word has length 28 [2021-07-13 20:46:28,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:28,475 INFO L482 AbstractCegarLoop]: Abstraction has 11306 states and 42710 transitions. [2021-07-13 20:46:28,475 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 20:46:28,475 INFO L276 IsEmpty]: Start isEmpty. Operand 11306 states and 42710 transitions. [2021-07-13 20:46:28,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:46:28,493 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:28,493 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 20:46:28,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3572,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:28,709 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:28,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:28,709 INFO L82 PathProgramCache]: Analyzing trace with hash -13939987, now seen corresponding path program 76 times [2021-07-13 20:46:28,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:28,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795859006] [2021-07-13 20:46:28,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:28,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:28,745 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 20:46:28,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:28,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795859006] [2021-07-13 20:46:28,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795859006] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:28,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033292716] [2021-07-13 20:46:28,746 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 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 20:46:28,769 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:46:28,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:28,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:46:28,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:28,828 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 20:46:28,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033292716] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:28,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:28,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-13 20:46:28,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695972319] [2021-07-13 20:46:28,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:46:28,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:28,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:46:28,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:46:28,828 INFO L87 Difference]: Start difference. First operand 11306 states and 42710 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 20:46:29,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:29,261 INFO L93 Difference]: Finished difference Result 15997 states and 59000 transitions. [2021-07-13 20:46:29,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:46:29,261 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 20:46:29,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:29,298 INFO L225 Difference]: With dead ends: 15997 [2021-07-13 20:46:29,298 INFO L226 Difference]: Without dead ends: 15985 [2021-07-13 20:46:29,298 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 230.9ms TimeCoverageRelationStatistics Valid=329, Invalid=1003, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:46:29,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15985 states. [2021-07-13 20:46:29,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15985 to 11272. [2021-07-13 20:46:29,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11272 states, 11271 states have (on average 3.780055008428711) internal successors, (42605), 11271 states have internal predecessors, (42605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:29,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11272 states to 11272 states and 42605 transitions. [2021-07-13 20:46:29,547 INFO L78 Accepts]: Start accepts. Automaton has 11272 states and 42605 transitions. Word has length 28 [2021-07-13 20:46:29,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:29,547 INFO L482 AbstractCegarLoop]: Abstraction has 11272 states and 42605 transitions. [2021-07-13 20:46:29,547 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 20:46:29,548 INFO L276 IsEmpty]: Start isEmpty. Operand 11272 states and 42605 transitions. [2021-07-13 20:46:29,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:46:29,566 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:29,566 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 20:46:29,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3573 [2021-07-13 20:46:29,782 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:29,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:29,782 INFO L82 PathProgramCache]: Analyzing trace with hash -141251547, now seen corresponding path program 77 times [2021-07-13 20:46:29,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:29,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907702278] [2021-07-13 20:46:29,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:29,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:29,815 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 20:46:29,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:29,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907702278] [2021-07-13 20:46:29,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907702278] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:29,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286148325] [2021-07-13 20:46:29,815 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:46:29,840 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:46:29,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:29,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:46:29,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:29,996 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 20:46:29,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286148325] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:29,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:29,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-13 20:46:29,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579693476] [2021-07-13 20:46:29,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:46:29,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:29,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:46:29,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:46:29,997 INFO L87 Difference]: Start difference. First operand 11272 states and 42605 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 20:46:30,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:30,907 INFO L93 Difference]: Finished difference Result 21775 states and 77547 transitions. [2021-07-13 20:46:30,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 20:46:30,907 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 20:46:30,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:30,959 INFO L225 Difference]: With dead ends: 21775 [2021-07-13 20:46:30,959 INFO L226 Difference]: Without dead ends: 21775 [2021-07-13 20:46:30,961 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 489.5ms TimeCoverageRelationStatistics Valid=798, Invalid=2394, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:46:30,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21775 states. [2021-07-13 20:46:31,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21775 to 11246. [2021-07-13 20:46:31,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11246 states, 11245 states have (on average 3.779101823032459) internal successors, (42496), 11245 states have internal predecessors, (42496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:31,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11246 states to 11246 states and 42496 transitions. [2021-07-13 20:46:31,254 INFO L78 Accepts]: Start accepts. Automaton has 11246 states and 42496 transitions. Word has length 28 [2021-07-13 20:46:31,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:31,255 INFO L482 AbstractCegarLoop]: Abstraction has 11246 states and 42496 transitions. [2021-07-13 20:46:31,255 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 20:46:31,255 INFO L276 IsEmpty]: Start isEmpty. Operand 11246 states and 42496 transitions. [2021-07-13 20:46:31,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:46:31,272 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:31,273 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 20:46:31,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3574,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:31,488 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:31,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:31,489 INFO L82 PathProgramCache]: Analyzing trace with hash 385520361, now seen corresponding path program 107 times [2021-07-13 20:46:31,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:31,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759451789] [2021-07-13 20:46:31,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:31,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:31,512 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 20:46:31,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:31,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759451789] [2021-07-13 20:46:31,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759451789] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:31,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709334529] [2021-07-13 20:46:31,512 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 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 20:46:31,544 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:46:31,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:31,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:46:31,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:31,630 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 20:46:31,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709334529] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:31,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:31,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-13 20:46:31,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789419405] [2021-07-13 20:46:31,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:46:31,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:31,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:46:31,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:46:31,631 INFO L87 Difference]: Start difference. First operand 11246 states and 42496 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 20:46:32,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:32,282 INFO L93 Difference]: Finished difference Result 17570 states and 63375 transitions. [2021-07-13 20:46:32,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:46:32,282 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 20:46:32,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:32,331 INFO L225 Difference]: With dead ends: 17570 [2021-07-13 20:46:32,331 INFO L226 Difference]: Without dead ends: 17557 [2021-07-13 20:46:32,332 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 358.4ms TimeCoverageRelationStatistics Valid=478, Invalid=1414, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:46:32,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17557 states. [2021-07-13 20:46:32,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17557 to 12557. [2021-07-13 20:46:32,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12557 states, 12556 states have (on average 3.8467664861420836) internal successors, (48300), 12556 states have internal predecessors, (48300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:32,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12557 states to 12557 states and 48300 transitions. [2021-07-13 20:46:32,738 INFO L78 Accepts]: Start accepts. Automaton has 12557 states and 48300 transitions. Word has length 28 [2021-07-13 20:46:32,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:32,738 INFO L482 AbstractCegarLoop]: Abstraction has 12557 states and 48300 transitions. [2021-07-13 20:46:32,738 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 20:46:32,738 INFO L276 IsEmpty]: Start isEmpty. Operand 12557 states and 48300 transitions. [2021-07-13 20:46:32,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:46:32,760 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:32,760 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 20:46:32,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3575,185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:32,976 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:32,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:32,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1057933143, now seen corresponding path program 108 times [2021-07-13 20:46:32,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:32,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705518704] [2021-07-13 20:46:32,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:32,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:32,999 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 20:46:32,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:32,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705518704] [2021-07-13 20:46:32,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705518704] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:33,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737842483] [2021-07-13 20:46:33,000 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 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 20:46:33,025 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:46:33,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:33,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:46:33,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:33,112 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 20:46:33,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737842483] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:33,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:33,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-13 20:46:33,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839597102] [2021-07-13 20:46:33,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:46:33,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:33,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:46:33,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:46:33,113 INFO L87 Difference]: Start difference. First operand 12557 states and 48300 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 20:46:33,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:33,836 INFO L93 Difference]: Finished difference Result 17668 states and 63624 transitions. [2021-07-13 20:46:33,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 20:46:33,837 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 20:46:33,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:33,877 INFO L225 Difference]: With dead ends: 17668 [2021-07-13 20:46:33,877 INFO L226 Difference]: Without dead ends: 17662 [2021-07-13 20:46:33,877 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 389.9ms TimeCoverageRelationStatistics Valid=541, Invalid=1715, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:46:33,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17662 states. [2021-07-13 20:46:34,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17662 to 12530. [2021-07-13 20:46:34,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12530 states, 12529 states have (on average 3.845957378880996) internal successors, (48186), 12529 states have internal predecessors, (48186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:34,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12530 states to 12530 states and 48186 transitions. [2021-07-13 20:46:34,180 INFO L78 Accepts]: Start accepts. Automaton has 12530 states and 48186 transitions. Word has length 28 [2021-07-13 20:46:34,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:34,181 INFO L482 AbstractCegarLoop]: Abstraction has 12530 states and 48186 transitions. [2021-07-13 20:46:34,181 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 20:46:34,181 INFO L276 IsEmpty]: Start isEmpty. Operand 12530 states and 48186 transitions. [2021-07-13 20:46:34,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:46:34,201 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:34,201 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 20:46:34,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3576,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:34,416 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:34,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:34,417 INFO L82 PathProgramCache]: Analyzing trace with hash -757405679, now seen corresponding path program 109 times [2021-07-13 20:46:34,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:34,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698857196] [2021-07-13 20:46:34,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:34,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:34,449 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 20:46:34,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:34,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698857196] [2021-07-13 20:46:34,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698857196] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:34,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329197602] [2021-07-13 20:46:34,450 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 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 20:46:34,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:34,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:46:34,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:34,536 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 20:46:34,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329197602] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:34,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:34,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-13 20:46:34,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855757680] [2021-07-13 20:46:34,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:46:34,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:34,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:46:34,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:46:34,537 INFO L87 Difference]: Start difference. First operand 12530 states and 48186 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 20:46:35,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:35,283 INFO L93 Difference]: Finished difference Result 19731 states and 71148 transitions. [2021-07-13 20:46:35,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:46:35,284 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 20:46:35,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:35,346 INFO L225 Difference]: With dead ends: 19731 [2021-07-13 20:46:35,347 INFO L226 Difference]: Without dead ends: 19718 [2021-07-13 20:46:35,347 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 297.4ms TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:46:35,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19718 states. [2021-07-13 20:46:35,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19718 to 12590. [2021-07-13 20:46:35,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12590 states, 12589 states have (on average 3.850663277464453) internal successors, (48476), 12589 states have internal predecessors, (48476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:35,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12590 states to 12590 states and 48476 transitions. [2021-07-13 20:46:35,806 INFO L78 Accepts]: Start accepts. Automaton has 12590 states and 48476 transitions. Word has length 28 [2021-07-13 20:46:35,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:35,806 INFO L482 AbstractCegarLoop]: Abstraction has 12590 states and 48476 transitions. [2021-07-13 20:46:35,806 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 20:46:35,806 INFO L276 IsEmpty]: Start isEmpty. Operand 12590 states and 48476 transitions. [2021-07-13 20:46:35,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:46:35,832 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:35,832 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 20:46:36,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3577,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:36,045 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:36,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:36,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1440150009, now seen corresponding path program 110 times [2021-07-13 20:46:36,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:36,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821080537] [2021-07-13 20:46:36,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:36,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:36,073 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 20:46:36,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:36,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821080537] [2021-07-13 20:46:36,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821080537] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:36,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979270434] [2021-07-13 20:46:36,073 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 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 20:46:36,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:46:36,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:36,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:46:36,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:36,185 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 20:46:36,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979270434] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:36,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:36,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-13 20:46:36,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646059069] [2021-07-13 20:46:36,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:46:36,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:36,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:46:36,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:46:36,186 INFO L87 Difference]: Start difference. First operand 12590 states and 48476 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 20:46:36,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:36,920 INFO L93 Difference]: Finished difference Result 20868 states and 74696 transitions. [2021-07-13 20:46:36,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 20:46:36,921 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 20:46:36,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:36,974 INFO L225 Difference]: With dead ends: 20868 [2021-07-13 20:46:36,975 INFO L226 Difference]: Without dead ends: 20868 [2021-07-13 20:46:36,975 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 400.2ms TimeCoverageRelationStatistics Valid=524, Invalid=1638, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:46:36,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20868 states. [2021-07-13 20:46:37,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20868 to 12606. [2021-07-13 20:46:37,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12606 states, 12605 states have (on average 3.8476001586671957) internal successors, (48499), 12605 states have internal predecessors, (48499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:37,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12606 states to 12606 states and 48499 transitions. [2021-07-13 20:46:37,385 INFO L78 Accepts]: Start accepts. Automaton has 12606 states and 48499 transitions. Word has length 28 [2021-07-13 20:46:37,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:37,385 INFO L482 AbstractCegarLoop]: Abstraction has 12606 states and 48499 transitions. [2021-07-13 20:46:37,385 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 20:46:37,385 INFO L276 IsEmpty]: Start isEmpty. Operand 12606 states and 48499 transitions. [2021-07-13 20:46:37,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:46:37,409 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:37,409 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 20:46:37,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3578,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:37,625 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:37,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:37,626 INFO L82 PathProgramCache]: Analyzing trace with hash -373053407, now seen corresponding path program 78 times [2021-07-13 20:46:37,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:37,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009325779] [2021-07-13 20:46:37,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:37,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:37,657 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 20:46:37,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:37,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009325779] [2021-07-13 20:46:37,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009325779] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:37,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513432384] [2021-07-13 20:46:37,657 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 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 20:46:37,707 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:46:37,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:37,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:46:37,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:37,787 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 20:46:37,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513432384] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:37,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:37,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-07-13 20:46:37,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693843947] [2021-07-13 20:46:37,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:46:37,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:37,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:46:37,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:46:37,788 INFO L87 Difference]: Start difference. First operand 12606 states and 48499 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 20:46:38,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:38,769 INFO L93 Difference]: Finished difference Result 21980 states and 80698 transitions. [2021-07-13 20:46:38,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-13 20:46:38,769 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 20:46:38,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:38,833 INFO L225 Difference]: With dead ends: 21980 [2021-07-13 20:46:38,833 INFO L226 Difference]: Without dead ends: 21976 [2021-07-13 20:46:38,833 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 527.7ms TimeCoverageRelationStatistics Valid=837, Invalid=2823, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:46:38,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21976 states. [2021-07-13 20:46:39,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21976 to 12860. [2021-07-13 20:46:39,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12860 states, 12859 states have (on average 3.837001322031262) internal successors, (49340), 12859 states have internal predecessors, (49340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:39,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12860 states to 12860 states and 49340 transitions. [2021-07-13 20:46:39,241 INFO L78 Accepts]: Start accepts. Automaton has 12860 states and 49340 transitions. Word has length 28 [2021-07-13 20:46:39,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:39,241 INFO L482 AbstractCegarLoop]: Abstraction has 12860 states and 49340 transitions. [2021-07-13 20:46:39,241 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 20:46:39,241 INFO L276 IsEmpty]: Start isEmpty. Operand 12860 states and 49340 transitions. [2021-07-13 20:46:39,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:46:39,266 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:39,266 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 20:46:39,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3579,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:39,480 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:39,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:39,480 INFO L82 PathProgramCache]: Analyzing trace with hash -498610355, now seen corresponding path program 111 times [2021-07-13 20:46:39,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:39,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481823090] [2021-07-13 20:46:39,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:39,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:39,508 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 20:46:39,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:39,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481823090] [2021-07-13 20:46:39,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481823090] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:39,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080308303] [2021-07-13 20:46:39,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:39,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:46:39,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:39,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:46:39,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:39,611 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 20:46:39,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080308303] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:39,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:39,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:46:39,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485863080] [2021-07-13 20:46:39,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:46:39,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:39,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:46:39,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:46:39,612 INFO L87 Difference]: Start difference. First operand 12860 states and 49340 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 20:46:40,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:40,228 INFO L93 Difference]: Finished difference Result 18670 states and 68341 transitions. [2021-07-13 20:46:40,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:46:40,229 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 20:46:40,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:40,273 INFO L225 Difference]: With dead ends: 18670 [2021-07-13 20:46:40,273 INFO L226 Difference]: Without dead ends: 18647 [2021-07-13 20:46:40,273 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 322.3ms TimeCoverageRelationStatistics Valid=449, Invalid=1273, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:46:40,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18647 states. [2021-07-13 20:46:40,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18647 to 13152. [2021-07-13 20:46:40,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13152 states, 13151 states have (on average 3.854307657212379) internal successors, (50688), 13151 states have internal predecessors, (50688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:40,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13152 states to 13152 states and 50688 transitions. [2021-07-13 20:46:40,607 INFO L78 Accepts]: Start accepts. Automaton has 13152 states and 50688 transitions. Word has length 28 [2021-07-13 20:46:40,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:40,608 INFO L482 AbstractCegarLoop]: Abstraction has 13152 states and 50688 transitions. [2021-07-13 20:46:40,608 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 20:46:40,608 INFO L276 IsEmpty]: Start isEmpty. Operand 13152 states and 50688 transitions. [2021-07-13 20:46:40,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:46:40,630 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:40,630 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 20:46:40,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3580 [2021-07-13 20:46:40,845 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:40,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:40,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1181354685, now seen corresponding path program 112 times [2021-07-13 20:46:40,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:40,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458219417] [2021-07-13 20:46:40,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:40,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:40,873 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 20:46:40,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:40,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458219417] [2021-07-13 20:46:40,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458219417] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:40,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631173317] [2021-07-13 20:46:40,873 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:40,897 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:46:40,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:40,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:46:40,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:40,955 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 20:46:40,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631173317] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:40,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:40,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:46:40,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488437811] [2021-07-13 20:46:40,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:46:40,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:40,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:46:40,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:46:40,957 INFO L87 Difference]: Start difference. First operand 13152 states and 50688 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 20:46:41,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:41,566 INFO L93 Difference]: Finished difference Result 18648 states and 67382 transitions. [2021-07-13 20:46:41,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:46:41,566 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 20:46:41,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:41,617 INFO L225 Difference]: With dead ends: 18648 [2021-07-13 20:46:41,617 INFO L226 Difference]: Without dead ends: 18648 [2021-07-13 20:46:41,618 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 348.9ms TimeCoverageRelationStatistics Valid=608, Invalid=1744, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:46:41,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18648 states. [2021-07-13 20:46:41,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18648 to 13107. [2021-07-13 20:46:41,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13107 states, 13106 states have (on average 3.8461010224324736) internal successors, (50407), 13106 states have internal predecessors, (50407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:42,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13107 states to 13107 states and 50407 transitions. [2021-07-13 20:46:42,020 INFO L78 Accepts]: Start accepts. Automaton has 13107 states and 50407 transitions. Word has length 28 [2021-07-13 20:46:42,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:42,022 INFO L482 AbstractCegarLoop]: Abstraction has 13107 states and 50407 transitions. [2021-07-13 20:46:42,022 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 20:46:42,022 INFO L276 IsEmpty]: Start isEmpty. Operand 13107 states and 50407 transitions. [2021-07-13 20:46:42,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:46:42,047 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:42,047 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 20:46:42,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3581 [2021-07-13 20:46:42,255 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:42,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:42,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1501473149, now seen corresponding path program 113 times [2021-07-13 20:46:42,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:42,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604566187] [2021-07-13 20:46:42,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:42,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:42,283 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 20:46:42,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:42,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604566187] [2021-07-13 20:46:42,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604566187] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:42,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701000660] [2021-07-13 20:46:42,284 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:42,311 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:46:42,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:42,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:46:42,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:42,369 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 20:46:42,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701000660] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:42,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:42,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:46:42,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622737560] [2021-07-13 20:46:42,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:46:42,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:42,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:46:42,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:46:42,370 INFO L87 Difference]: Start difference. First operand 13107 states and 50407 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 20:46:42,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:42,934 INFO L93 Difference]: Finished difference Result 19972 states and 72578 transitions. [2021-07-13 20:46:42,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:46:42,935 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 20:46:42,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:42,989 INFO L225 Difference]: With dead ends: 19972 [2021-07-13 20:46:42,990 INFO L226 Difference]: Without dead ends: 19972 [2021-07-13 20:46:42,990 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 302.3ms TimeCoverageRelationStatistics Valid=505, Invalid=1301, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:46:43,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19972 states. [2021-07-13 20:46:43,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19972 to 13820. [2021-07-13 20:46:43,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13820 states, 13819 states have (on average 3.832259931977712) internal successors, (52958), 13819 states have internal predecessors, (52958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:43,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13820 states to 13820 states and 52958 transitions. [2021-07-13 20:46:43,351 INFO L78 Accepts]: Start accepts. Automaton has 13820 states and 52958 transitions. Word has length 28 [2021-07-13 20:46:43,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:43,352 INFO L482 AbstractCegarLoop]: Abstraction has 13820 states and 52958 transitions. [2021-07-13 20:46:43,352 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 20:46:43,352 INFO L276 IsEmpty]: Start isEmpty. Operand 13820 states and 52958 transitions. [2021-07-13 20:46:43,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:46:43,377 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:43,377 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 20:46:43,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3582,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:43,580 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:43,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:43,580 INFO L82 PathProgramCache]: Analyzing trace with hash -612070185, now seen corresponding path program 114 times [2021-07-13 20:46:43,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:43,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211986830] [2021-07-13 20:46:43,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:43,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:43,614 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 20:46:43,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:43,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211986830] [2021-07-13 20:46:43,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211986830] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:43,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185981952] [2021-07-13 20:46:43,615 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:43,650 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:46:43,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:43,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:46:43,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:43,731 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 20:46:43,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185981952] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:43,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:43,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 20:46:43,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904287636] [2021-07-13 20:46:43,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:46:43,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:43,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:46:43,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:46:43,733 INFO L87 Difference]: Start difference. First operand 13820 states and 52958 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 20:46:44,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:44,609 INFO L93 Difference]: Finished difference Result 22381 states and 80178 transitions. [2021-07-13 20:46:44,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:46:44,609 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 20:46:44,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:44,667 INFO L225 Difference]: With dead ends: 22381 [2021-07-13 20:46:44,668 INFO L226 Difference]: Without dead ends: 22381 [2021-07-13 20:46:44,668 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 471.3ms TimeCoverageRelationStatistics Valid=698, Invalid=1752, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:46:44,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22381 states. [2021-07-13 20:46:45,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22381 to 14048. [2021-07-13 20:46:45,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14048 states, 14047 states have (on average 3.843881255784153) internal successors, (53995), 14047 states have internal predecessors, (53995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:45,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14048 states to 14048 states and 53995 transitions. [2021-07-13 20:46:45,157 INFO L78 Accepts]: Start accepts. Automaton has 14048 states and 53995 transitions. Word has length 28 [2021-07-13 20:46:45,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:45,157 INFO L482 AbstractCegarLoop]: Abstraction has 14048 states and 53995 transitions. [2021-07-13 20:46:45,157 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 20:46:45,157 INFO L276 IsEmpty]: Start isEmpty. Operand 14048 states and 53995 transitions. [2021-07-13 20:46:45,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:46:45,182 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:45,182 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 20:46:45,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3583 [2021-07-13 20:46:45,399 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:45,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:45,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1934603223, now seen corresponding path program 79 times [2021-07-13 20:46:45,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:45,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593629305] [2021-07-13 20:46:45,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:45,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:45,431 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 20:46:45,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:45,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593629305] [2021-07-13 20:46:45,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593629305] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:45,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681285279] [2021-07-13 20:46:45,431 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:45,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:45,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:46:45,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:45,563 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 20:46:45,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681285279] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:45,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:45,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:46:45,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234070951] [2021-07-13 20:46:45,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:46:45,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:45,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:46:45,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:46:45,564 INFO L87 Difference]: Start difference. First operand 14048 states and 53995 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 20:46:47,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:47,014 INFO L93 Difference]: Finished difference Result 39001 states and 140171 transitions. [2021-07-13 20:46:47,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-07-13 20:46:47,014 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 20:46:47,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:47,155 INFO L225 Difference]: With dead ends: 39001 [2021-07-13 20:46:47,156 INFO L226 Difference]: Without dead ends: 39001 [2021-07-13 20:46:47,157 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2606 ImplicationChecksByTransitivity, 834.4ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-07-13 20:46:47,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39001 states. [2021-07-13 20:46:47,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39001 to 15286. [2021-07-13 20:46:47,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15286 states, 15285 states have (on average 3.890677134445535) internal successors, (59469), 15285 states have internal predecessors, (59469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:48,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15286 states to 15286 states and 59469 transitions. [2021-07-13 20:46:48,002 INFO L78 Accepts]: Start accepts. Automaton has 15286 states and 59469 transitions. Word has length 28 [2021-07-13 20:46:48,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:48,002 INFO L482 AbstractCegarLoop]: Abstraction has 15286 states and 59469 transitions. [2021-07-13 20:46:48,002 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 20:46:48,002 INFO L276 IsEmpty]: Start isEmpty. Operand 15286 states and 59469 transitions. [2021-07-13 20:46:48,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:46:48,029 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:48,029 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 20:46:48,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3584 [2021-07-13 20:46:48,245 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:48,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:48,245 INFO L82 PathProgramCache]: Analyzing trace with hash -405698579, now seen corresponding path program 80 times [2021-07-13 20:46:48,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:48,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553799817] [2021-07-13 20:46:48,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:48,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:48,278 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 20:46:48,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:48,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553799817] [2021-07-13 20:46:48,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553799817] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:48,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717082784] [2021-07-13 20:46:48,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:48,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:46:48,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:48,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:46:48,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:48,386 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 20:46:48,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717082784] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:48,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:48,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:46:48,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541890415] [2021-07-13 20:46:48,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:46:48,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:48,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:46:48,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:46:48,387 INFO L87 Difference]: Start difference. First operand 15286 states and 59469 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 20:46:49,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:49,720 INFO L93 Difference]: Finished difference Result 38023 states and 137597 transitions. [2021-07-13 20:46:49,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-07-13 20:46:49,720 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 20:46:49,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:49,835 INFO L225 Difference]: With dead ends: 38023 [2021-07-13 20:46:49,835 INFO L226 Difference]: Without dead ends: 38023 [2021-07-13 20:46:49,836 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2605 ImplicationChecksByTransitivity, 757.5ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-07-13 20:46:49,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38023 states. [2021-07-13 20:46:50,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38023 to 15260. [2021-07-13 20:46:50,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15260 states, 15259 states have (on average 3.8870830329641524) internal successors, (59313), 15259 states have internal predecessors, (59313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:50,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15260 states to 15260 states and 59313 transitions. [2021-07-13 20:46:50,515 INFO L78 Accepts]: Start accepts. Automaton has 15260 states and 59313 transitions. Word has length 28 [2021-07-13 20:46:50,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:50,515 INFO L482 AbstractCegarLoop]: Abstraction has 15260 states and 59313 transitions. [2021-07-13 20:46:50,515 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 20:46:50,515 INFO L276 IsEmpty]: Start isEmpty. Operand 15260 states and 59313 transitions. [2021-07-13 20:46:50,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:46:50,543 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:50,543 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 20:46:50,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3585,195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:50,745 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:50,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:50,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1649877491, now seen corresponding path program 115 times [2021-07-13 20:46:50,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:50,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847424031] [2021-07-13 20:46:50,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:50,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:50,781 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 20:46:50,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:50,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847424031] [2021-07-13 20:46:50,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847424031] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:50,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134679507] [2021-07-13 20:46:50,781 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 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 20:46:50,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:50,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:46:50,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:50,863 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 20:46:50,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134679507] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:50,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:50,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:46:50,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354867402] [2021-07-13 20:46:50,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:46:50,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:50,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:46:50,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:46:50,864 INFO L87 Difference]: Start difference. First operand 15260 states and 59313 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 20:46:51,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:51,218 INFO L93 Difference]: Finished difference Result 23613 states and 90414 transitions. [2021-07-13 20:46:51,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:46:51,218 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 20:46:51,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:51,293 INFO L225 Difference]: With dead ends: 23613 [2021-07-13 20:46:51,293 INFO L226 Difference]: Without dead ends: 23563 [2021-07-13 20:46:51,293 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 156.1ms TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:46:51,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23563 states. [2021-07-13 20:46:51,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23563 to 20372. [2021-07-13 20:46:51,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20372 states, 20371 states have (on average 3.902803004270777) internal successors, (79504), 20371 states have internal predecessors, (79504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:51,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20372 states to 20372 states and 79504 transitions. [2021-07-13 20:46:51,771 INFO L78 Accepts]: Start accepts. Automaton has 20372 states and 79504 transitions. Word has length 28 [2021-07-13 20:46:51,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:51,771 INFO L482 AbstractCegarLoop]: Abstraction has 20372 states and 79504 transitions. [2021-07-13 20:46:51,771 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 20:46:51,771 INFO L276 IsEmpty]: Start isEmpty. Operand 20372 states and 79504 transitions. [2021-07-13 20:46:51,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:46:51,806 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:51,806 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 20:46:52,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3586,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:52,021 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:52,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:52,021 INFO L82 PathProgramCache]: Analyzing trace with hash 260189251, now seen corresponding path program 116 times [2021-07-13 20:46:52,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:52,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692574440] [2021-07-13 20:46:52,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:52,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:52,045 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 20:46:52,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:52,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692574440] [2021-07-13 20:46:52,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692574440] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:52,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066437487] [2021-07-13 20:46:52,045 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 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 20:46:52,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:46:52,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:52,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:46:52,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:52,126 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 20:46:52,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066437487] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:52,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:52,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:46:52,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608053608] [2021-07-13 20:46:52,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:46:52,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:52,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:46:52,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:46:52,127 INFO L87 Difference]: Start difference. First operand 20372 states and 79504 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 20:46:52,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:52,350 INFO L93 Difference]: Finished difference Result 23123 states and 87862 transitions. [2021-07-13 20:46:52,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:46:52,350 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 20:46:52,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:52,410 INFO L225 Difference]: With dead ends: 23123 [2021-07-13 20:46:52,410 INFO L226 Difference]: Without dead ends: 23123 [2021-07-13 20:46:52,410 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 79.0ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:46:52,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23123 states. [2021-07-13 20:46:52,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23123 to 19875. [2021-07-13 20:46:52,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19875 states, 19874 states have (on average 3.891114018315387) internal successors, (77332), 19874 states have internal predecessors, (77332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:52,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19875 states to 19875 states and 77332 transitions. [2021-07-13 20:46:52,883 INFO L78 Accepts]: Start accepts. Automaton has 19875 states and 77332 transitions. Word has length 28 [2021-07-13 20:46:52,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:52,883 INFO L482 AbstractCegarLoop]: Abstraction has 19875 states and 77332 transitions. [2021-07-13 20:46:52,883 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 20:46:52,883 INFO L276 IsEmpty]: Start isEmpty. Operand 19875 states and 77332 transitions. [2021-07-13 20:46:52,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:46:52,917 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:52,917 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 20:46:53,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3587 [2021-07-13 20:46:53,129 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:53,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:53,129 INFO L82 PathProgramCache]: Analyzing trace with hash -691492187, now seen corresponding path program 117 times [2021-07-13 20:46:53,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:53,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826633909] [2021-07-13 20:46:53,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:53,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:53,170 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 20:46:53,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:53,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826633909] [2021-07-13 20:46:53,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826633909] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:53,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466301046] [2021-07-13 20:46:53,170 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 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 20:46:53,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:46:53,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:53,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:46:53,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:53,341 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 20:46:53,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466301046] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:53,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:53,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-07-13 20:46:53,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158625067] [2021-07-13 20:46:53,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:46:53,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:53,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:46:53,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:46:53,342 INFO L87 Difference]: Start difference. First operand 19875 states and 77332 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 20:46:54,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:54,415 INFO L93 Difference]: Finished difference Result 31643 states and 117215 transitions. [2021-07-13 20:46:54,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 20:46:54,415 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 20:46:54,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:54,523 INFO L225 Difference]: With dead ends: 31643 [2021-07-13 20:46:54,523 INFO L226 Difference]: Without dead ends: 31643 [2021-07-13 20:46:54,523 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 541.0ms TimeCoverageRelationStatistics Valid=720, Invalid=2472, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:46:54,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31643 states. [2021-07-13 20:46:55,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31643 to 19937. [2021-07-13 20:46:55,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19937 states, 19936 states have (on average 3.889446227929374) internal successors, (77540), 19936 states have internal predecessors, (77540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:55,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19937 states to 19937 states and 77540 transitions. [2021-07-13 20:46:55,122 INFO L78 Accepts]: Start accepts. Automaton has 19937 states and 77540 transitions. Word has length 28 [2021-07-13 20:46:55,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:55,122 INFO L482 AbstractCegarLoop]: Abstraction has 19937 states and 77540 transitions. [2021-07-13 20:46:55,122 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 20:46:55,122 INFO L276 IsEmpty]: Start isEmpty. Operand 19937 states and 77540 transitions. [2021-07-13 20:46:55,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:46:55,158 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:55,158 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 20:46:55,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3588,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:55,373 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:55,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:55,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1667811031, now seen corresponding path program 118 times [2021-07-13 20:46:55,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:55,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431867689] [2021-07-13 20:46:55,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:55,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:55,410 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 20:46:55,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:55,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431867689] [2021-07-13 20:46:55,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431867689] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:55,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583573106] [2021-07-13 20:46:55,410 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 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 20:46:55,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:46:55,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:55,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:46:55,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:55,535 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 20:46:55,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583573106] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:55,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:55,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-13 20:46:55,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015973139] [2021-07-13 20:46:55,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:46:55,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:55,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:46:55,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:46:55,536 INFO L87 Difference]: Start difference. First operand 19937 states and 77540 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 20:46:57,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:57,072 INFO L93 Difference]: Finished difference Result 40452 states and 148213 transitions. [2021-07-13 20:46:57,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-07-13 20:46:57,073 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 20:46:57,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:57,340 INFO L225 Difference]: With dead ends: 40452 [2021-07-13 20:46:57,340 INFO L226 Difference]: Without dead ends: 40452 [2021-07-13 20:46:57,341 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3102 ImplicationChecksByTransitivity, 873.1ms TimeCoverageRelationStatistics Valid=1548, Invalid=6284, Unknown=0, NotChecked=0, Total=7832 [2021-07-13 20:46:57,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40452 states. [2021-07-13 20:46:57,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40452 to 19942. [2021-07-13 20:46:57,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19942 states, 19941 states have (on average 3.891530013539943) internal successors, (77601), 19941 states have internal predecessors, (77601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:58,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19942 states to 19942 states and 77601 transitions. [2021-07-13 20:46:58,023 INFO L78 Accepts]: Start accepts. Automaton has 19942 states and 77601 transitions. Word has length 28 [2021-07-13 20:46:58,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:58,023 INFO L482 AbstractCegarLoop]: Abstraction has 19942 states and 77601 transitions. [2021-07-13 20:46:58,023 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 20:46:58,023 INFO L276 IsEmpty]: Start isEmpty. Operand 19942 states and 77601 transitions. [2021-07-13 20:46:58,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:46:58,058 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:58,058 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 20:46:58,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3589,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:58,274 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:58,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:58,275 INFO L82 PathProgramCache]: Analyzing trace with hash -138906387, now seen corresponding path program 119 times [2021-07-13 20:46:58,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:58,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827093846] [2021-07-13 20:46:58,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:58,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:58,310 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 20:46:58,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:58,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827093846] [2021-07-13 20:46:58,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827093846] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:58,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894437632] [2021-07-13 20:46:58,310 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 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 20:46:58,336 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:46:58,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:58,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:46:58,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:58,434 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 20:46:58,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894437632] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:58,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:58,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-13 20:46:58,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639464933] [2021-07-13 20:46:58,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:46:58,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:58,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:46:58,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:46:58,457 INFO L87 Difference]: Start difference. First operand 19942 states and 77601 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 20:46:59,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:59,971 INFO L93 Difference]: Finished difference Result 40013 states and 147353 transitions. [2021-07-13 20:46:59,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-07-13 20:46:59,972 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 20:46:59,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:00,107 INFO L225 Difference]: With dead ends: 40013 [2021-07-13 20:47:00,107 INFO L226 Difference]: Without dead ends: 40013 [2021-07-13 20:47:00,108 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2992 ImplicationChecksByTransitivity, 879.5ms TimeCoverageRelationStatistics Valid=1515, Invalid=6141, Unknown=0, NotChecked=0, Total=7656 [2021-07-13 20:47:00,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40013 states. [2021-07-13 20:47:00,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40013 to 19730. [2021-07-13 20:47:00,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19730 states, 19729 states have (on average 3.8836230929089157) internal successors, (76620), 19729 states have internal predecessors, (76620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:00,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19730 states to 19730 states and 76620 transitions. [2021-07-13 20:47:00,992 INFO L78 Accepts]: Start accepts. Automaton has 19730 states and 76620 transitions. Word has length 28 [2021-07-13 20:47:00,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:00,993 INFO L482 AbstractCegarLoop]: Abstraction has 19730 states and 76620 transitions. [2021-07-13 20:47:00,993 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 20:47:00,993 INFO L276 IsEmpty]: Start isEmpty. Operand 19730 states and 76620 transitions. [2021-07-13 20:47:01,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:47:01,035 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:01,035 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 20:47:01,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3590 [2021-07-13 20:47:01,252 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:01,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:01,252 INFO L82 PathProgramCache]: Analyzing trace with hash -164720279, now seen corresponding path program 120 times [2021-07-13 20:47:01,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:01,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468474582] [2021-07-13 20:47:01,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:01,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:01,287 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 20:47:01,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:01,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468474582] [2021-07-13 20:47:01,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468474582] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:01,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330447420] [2021-07-13 20:47:01,287 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 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 20:47:01,312 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:47:01,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:01,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:47:01,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:01,369 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 20:47:01,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330447420] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:01,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:01,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-07-13 20:47:01,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375266464] [2021-07-13 20:47:01,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:47:01,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:01,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:47:01,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:47:01,370 INFO L87 Difference]: Start difference. First operand 19730 states and 76620 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 20:47:01,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:01,664 INFO L93 Difference]: Finished difference Result 29201 states and 109016 transitions. [2021-07-13 20:47:01,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:47:01,664 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 20:47:01,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:01,755 INFO L225 Difference]: With dead ends: 29201 [2021-07-13 20:47:01,755 INFO L226 Difference]: Without dead ends: 29184 [2021-07-13 20:47:01,755 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 100.3ms TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:47:01,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29184 states. [2021-07-13 20:47:02,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29184 to 19998. [2021-07-13 20:47:02,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19998 states, 19997 states have (on average 3.889183377506626) internal successors, (77772), 19997 states have internal predecessors, (77772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:02,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19998 states to 19998 states and 77772 transitions. [2021-07-13 20:47:02,339 INFO L78 Accepts]: Start accepts. Automaton has 19998 states and 77772 transitions. Word has length 28 [2021-07-13 20:47:02,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:02,339 INFO L482 AbstractCegarLoop]: Abstraction has 19998 states and 77772 transitions. [2021-07-13 20:47:02,339 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 20:47:02,339 INFO L276 IsEmpty]: Start isEmpty. Operand 19998 states and 77772 transitions. [2021-07-13 20:47:02,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:47:02,375 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:02,375 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 20:47:02,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3591 [2021-07-13 20:47:02,592 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:02,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:02,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1307646319, now seen corresponding path program 121 times [2021-07-13 20:47:02,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:02,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750290151] [2021-07-13 20:47:02,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:02,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:02,618 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 20:47:02,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:02,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750290151] [2021-07-13 20:47:02,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750290151] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:02,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12953344] [2021-07-13 20:47:02,618 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 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 20:47:02,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:02,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:47:02,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:02,704 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 20:47:02,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12953344] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:02,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:02,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-07-13 20:47:02,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959529059] [2021-07-13 20:47:02,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:47:02,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:02,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:47:02,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:47:02,705 INFO L87 Difference]: Start difference. First operand 19998 states and 77772 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 20:47:03,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:03,007 INFO L93 Difference]: Finished difference Result 30984 states and 114572 transitions. [2021-07-13 20:47:03,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:47:03,007 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 20:47:03,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:03,216 INFO L225 Difference]: With dead ends: 30984 [2021-07-13 20:47:03,216 INFO L226 Difference]: Without dead ends: 30984 [2021-07-13 20:47:03,216 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 116.4ms TimeCoverageRelationStatistics Valid=135, Invalid=245, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:47:03,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30984 states. [2021-07-13 20:47:03,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30984 to 19667. [2021-07-13 20:47:03,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19667 states, 19666 states have (on average 3.8739957286687683) internal successors, (76186), 19666 states have internal predecessors, (76186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:03,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19667 states to 19667 states and 76186 transitions. [2021-07-13 20:47:03,724 INFO L78 Accepts]: Start accepts. Automaton has 19667 states and 76186 transitions. Word has length 28 [2021-07-13 20:47:03,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:03,724 INFO L482 AbstractCegarLoop]: Abstraction has 19667 states and 76186 transitions. [2021-07-13 20:47:03,724 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 20:47:03,724 INFO L276 IsEmpty]: Start isEmpty. Operand 19667 states and 76186 transitions. [2021-07-13 20:47:03,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:47:03,761 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:03,761 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 20:47:03,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3592 [2021-07-13 20:47:03,977 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:03,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:03,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1640639411, now seen corresponding path program 122 times [2021-07-13 20:47:03,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:03,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041187138] [2021-07-13 20:47:03,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:03,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:04,012 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 20:47:04,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:04,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041187138] [2021-07-13 20:47:04,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041187138] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:04,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367690926] [2021-07-13 20:47:04,013 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 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 20:47:04,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:47:04,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:04,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:47:04,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:04,116 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 20:47:04,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367690926] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:04,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:04,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-13 20:47:04,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092766947] [2021-07-13 20:47:04,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:47:04,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:04,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:47:04,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:47:04,116 INFO L87 Difference]: Start difference. First operand 19667 states and 76186 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 20:47:04,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:04,925 INFO L93 Difference]: Finished difference Result 29160 states and 108410 transitions. [2021-07-13 20:47:04,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-13 20:47:04,925 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 20:47:04,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:05,012 INFO L225 Difference]: With dead ends: 29160 [2021-07-13 20:47:05,013 INFO L226 Difference]: Without dead ends: 29160 [2021-07-13 20:47:05,013 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 399.9ms TimeCoverageRelationStatistics Valid=589, Invalid=1961, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:47:05,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29160 states. [2021-07-13 20:47:05,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29160 to 19711. [2021-07-13 20:47:05,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19711 states, 19710 states have (on average 3.8728564180618976) internal successors, (76334), 19710 states have internal predecessors, (76334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:05,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19711 states to 19711 states and 76334 transitions. [2021-07-13 20:47:05,618 INFO L78 Accepts]: Start accepts. Automaton has 19711 states and 76334 transitions. Word has length 28 [2021-07-13 20:47:05,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:05,618 INFO L482 AbstractCegarLoop]: Abstraction has 19711 states and 76334 transitions. [2021-07-13 20:47:05,618 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 20:47:05,618 INFO L276 IsEmpty]: Start isEmpty. Operand 19711 states and 76334 transitions. [2021-07-13 20:47:05,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:47:05,652 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:05,653 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 20:47:05,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3593 [2021-07-13 20:47:05,853 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:05,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:05,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1869413791, now seen corresponding path program 123 times [2021-07-13 20:47:05,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:05,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084537525] [2021-07-13 20:47:05,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:05,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:05,891 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 20:47:05,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:05,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084537525] [2021-07-13 20:47:05,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084537525] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:05,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430201680] [2021-07-13 20:47:05,891 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 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 20:47:05,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:47:05,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:05,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:47:05,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:06,009 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 20:47:06,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430201680] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:06,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:06,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-13 20:47:06,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643146420] [2021-07-13 20:47:06,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:47:06,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:06,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:47:06,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:47:06,010 INFO L87 Difference]: Start difference. First operand 19711 states and 76334 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 20:47:07,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:07,116 INFO L93 Difference]: Finished difference Result 30658 states and 112697 transitions. [2021-07-13 20:47:07,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-13 20:47:07,116 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 20:47:07,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:07,208 INFO L225 Difference]: With dead ends: 30658 [2021-07-13 20:47:07,208 INFO L226 Difference]: Without dead ends: 30658 [2021-07-13 20:47:07,209 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1623 ImplicationChecksByTransitivity, 666.4ms TimeCoverageRelationStatistics Valid=928, Invalid=3494, Unknown=0, NotChecked=0, Total=4422 [2021-07-13 20:47:07,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30658 states. [2021-07-13 20:47:07,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30658 to 20243. [2021-07-13 20:47:07,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20243 states, 20242 states have (on average 3.8518921055231696) internal successors, (77970), 20242 states have internal predecessors, (77970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:07,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20243 states to 20243 states and 77970 transitions. [2021-07-13 20:47:07,819 INFO L78 Accepts]: Start accepts. Automaton has 20243 states and 77970 transitions. Word has length 28 [2021-07-13 20:47:07,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:07,819 INFO L482 AbstractCegarLoop]: Abstraction has 20243 states and 77970 transitions. [2021-07-13 20:47:07,819 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 20:47:07,819 INFO L276 IsEmpty]: Start isEmpty. Operand 20243 states and 77970 transitions. [2021-07-13 20:47:07,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:47:07,855 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:07,855 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 20:47:08,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3594 [2021-07-13 20:47:08,071 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:08,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:08,071 INFO L82 PathProgramCache]: Analyzing trace with hash -923294047, now seen corresponding path program 124 times [2021-07-13 20:47:08,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:08,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249520267] [2021-07-13 20:47:08,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:08,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:08,105 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 20:47:08,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:08,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249520267] [2021-07-13 20:47:08,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249520267] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:08,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434685260] [2021-07-13 20:47:08,106 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 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 20:47:08,136 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:47:08,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:08,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:47:08,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:08,208 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 20:47:08,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434685260] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:08,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:08,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-13 20:47:08,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871573654] [2021-07-13 20:47:08,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:47:08,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:08,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:47:08,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:47:08,209 INFO L87 Difference]: Start difference. First operand 20243 states and 77970 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 20:47:09,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:09,107 INFO L93 Difference]: Finished difference Result 29767 states and 110352 transitions. [2021-07-13 20:47:09,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-13 20:47:09,108 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 20:47:09,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:09,209 INFO L225 Difference]: With dead ends: 29767 [2021-07-13 20:47:09,209 INFO L226 Difference]: Without dead ends: 29763 [2021-07-13 20:47:09,210 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1121 ImplicationChecksByTransitivity, 454.2ms TimeCoverageRelationStatistics Valid=736, Invalid=2570, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:47:09,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29763 states. [2021-07-13 20:47:09,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29763 to 20135. [2021-07-13 20:47:09,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20135 states, 20134 states have (on average 3.854773020760902) internal successors, (77612), 20134 states have internal predecessors, (77612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:09,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20135 states to 20135 states and 77612 transitions. [2021-07-13 20:47:09,866 INFO L78 Accepts]: Start accepts. Automaton has 20135 states and 77612 transitions. Word has length 28 [2021-07-13 20:47:09,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:09,866 INFO L482 AbstractCegarLoop]: Abstraction has 20135 states and 77612 transitions. [2021-07-13 20:47:09,866 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 20:47:09,866 INFO L276 IsEmpty]: Start isEmpty. Operand 20135 states and 77612 transitions. [2021-07-13 20:47:09,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:47:09,900 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:09,901 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 20:47:10,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3595,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:10,117 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:10,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:10,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1048850995, now seen corresponding path program 125 times [2021-07-13 20:47:10,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:10,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299789532] [2021-07-13 20:47:10,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:10,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:10,142 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 20:47:10,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:10,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299789532] [2021-07-13 20:47:10,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299789532] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:10,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367517414] [2021-07-13 20:47:10,143 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 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 20:47:10,184 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:47:10,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:10,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:47:10,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:10,226 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 20:47:10,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367517414] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:10,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:10,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-07-13 20:47:10,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778824588] [2021-07-13 20:47:10,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:47:10,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:10,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:47:10,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:47:10,227 INFO L87 Difference]: Start difference. First operand 20135 states and 77612 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 20:47:10,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:10,445 INFO L93 Difference]: Finished difference Result 25115 states and 93450 transitions. [2021-07-13 20:47:10,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:47:10,445 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 20:47:10,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:10,515 INFO L225 Difference]: With dead ends: 25115 [2021-07-13 20:47:10,515 INFO L226 Difference]: Without dead ends: 25115 [2021-07-13 20:47:10,515 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 82.0ms TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:47:10,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25115 states. [2021-07-13 20:47:10,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25115 to 20445. [2021-07-13 20:47:10,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20445 states, 20444 states have (on average 3.845871649383682) internal successors, (78625), 20444 states have internal predecessors, (78625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:10,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20445 states to 20445 states and 78625 transitions. [2021-07-13 20:47:10,971 INFO L78 Accepts]: Start accepts. Automaton has 20445 states and 78625 transitions. Word has length 28 [2021-07-13 20:47:10,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:10,971 INFO L482 AbstractCegarLoop]: Abstraction has 20445 states and 78625 transitions. [2021-07-13 20:47:10,971 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 20:47:10,971 INFO L276 IsEmpty]: Start isEmpty. Operand 20445 states and 78625 transitions. [2021-07-13 20:47:11,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:47:11,006 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:11,007 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 20:47:11,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3596,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:11,221 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:11,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:11,222 INFO L82 PathProgramCache]: Analyzing trace with hash -118651251, now seen corresponding path program 126 times [2021-07-13 20:47:11,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:11,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256368544] [2021-07-13 20:47:11,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:11,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:11,262 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 20:47:11,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:11,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256368544] [2021-07-13 20:47:11,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256368544] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:11,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545831742] [2021-07-13 20:47:11,263 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 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 20:47:11,288 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:47:11,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:11,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:47:11,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:11,355 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 20:47:11,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545831742] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:11,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:11,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-07-13 20:47:11,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080426243] [2021-07-13 20:47:11,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:47:11,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:11,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:47:11,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:47:11,356 INFO L87 Difference]: Start difference. First operand 20445 states and 78625 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 20:47:12,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:12,269 INFO L93 Difference]: Finished difference Result 30869 states and 113082 transitions. [2021-07-13 20:47:12,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 20:47:12,269 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 20:47:12,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:12,360 INFO L225 Difference]: With dead ends: 30869 [2021-07-13 20:47:12,361 INFO L226 Difference]: Without dead ends: 30869 [2021-07-13 20:47:12,361 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 519.8ms TimeCoverageRelationStatistics Valid=684, Invalid=2396, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 20:47:12,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30869 states. [2021-07-13 20:47:12,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30869 to 22051. [2021-07-13 20:47:12,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22051 states, 22050 states have (on average 3.8592743764172335) internal successors, (85097), 22050 states have internal predecessors, (85097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:12,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22051 states to 22051 states and 85097 transitions. [2021-07-13 20:47:12,966 INFO L78 Accepts]: Start accepts. Automaton has 22051 states and 85097 transitions. Word has length 28 [2021-07-13 20:47:12,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:12,966 INFO L482 AbstractCegarLoop]: Abstraction has 22051 states and 85097 transitions. [2021-07-13 20:47:12,966 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 20:47:12,966 INFO L276 IsEmpty]: Start isEmpty. Operand 22051 states and 85097 transitions. [2021-07-13 20:47:13,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:47:13,011 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:13,011 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 20:47:13,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3597,207 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:13,228 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:13,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:13,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1808445805, now seen corresponding path program 127 times [2021-07-13 20:47:13,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:13,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52794216] [2021-07-13 20:47:13,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:13,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:13,261 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 20:47:13,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:13,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52794216] [2021-07-13 20:47:13,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52794216] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:13,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502631576] [2021-07-13 20:47:13,262 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 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 20:47:13,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:13,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:47:13,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:13,347 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 20:47:13,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502631576] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:13,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:13,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-07-13 20:47:13,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414881206] [2021-07-13 20:47:13,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:47:13,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:13,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:47:13,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:47:13,348 INFO L87 Difference]: Start difference. First operand 22051 states and 85097 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 20:47:14,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:14,070 INFO L93 Difference]: Finished difference Result 29083 states and 108458 transitions. [2021-07-13 20:47:14,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:47:14,070 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 20:47:14,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:14,167 INFO L225 Difference]: With dead ends: 29083 [2021-07-13 20:47:14,168 INFO L226 Difference]: Without dead ends: 29071 [2021-07-13 20:47:14,168 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 355.5ms TimeCoverageRelationStatistics Valid=503, Invalid=1849, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:47:14,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29071 states. [2021-07-13 20:47:14,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29071 to 22169. [2021-07-13 20:47:14,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22169 states, 22168 states have (on average 3.854655359076146) internal successors, (85450), 22168 states have internal predecessors, (85450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:14,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22169 states to 22169 states and 85450 transitions. [2021-07-13 20:47:14,996 INFO L78 Accepts]: Start accepts. Automaton has 22169 states and 85450 transitions. Word has length 28 [2021-07-13 20:47:14,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:14,996 INFO L482 AbstractCegarLoop]: Abstraction has 22169 states and 85450 transitions. [2021-07-13 20:47:14,996 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 20:47:14,996 INFO L276 IsEmpty]: Start isEmpty. Operand 22169 states and 85450 transitions. [2021-07-13 20:47:15,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:47:15,058 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:15,058 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 20:47:15,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3598,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:15,275 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:15,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:15,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1705760401, now seen corresponding path program 128 times [2021-07-13 20:47:15,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:15,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521310387] [2021-07-13 20:47:15,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:15,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:15,412 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-07-13 20:47:15,418 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 20:47:15,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:15,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521310387] [2021-07-13 20:47:15,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521310387] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:15,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660512249] [2021-07-13 20:47:15,418 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 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 20:47:15,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:47:15,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:15,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:47:15,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:15,486 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 20:47:15,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660512249] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:15,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:15,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-13 20:47:15,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767776706] [2021-07-13 20:47:15,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:47:15,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:15,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:47:15,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:47:15,487 INFO L87 Difference]: Start difference. First operand 22169 states and 85450 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 20:47:15,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:15,761 INFO L93 Difference]: Finished difference Result 25428 states and 96407 transitions. [2021-07-13 20:47:15,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:47:15,762 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 20:47:15,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:15,841 INFO L225 Difference]: With dead ends: 25428 [2021-07-13 20:47:15,841 INFO L226 Difference]: Without dead ends: 25428 [2021-07-13 20:47:15,841 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 200.1ms TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:47:15,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25428 states. [2021-07-13 20:47:16,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25428 to 22972. [2021-07-13 20:47:16,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22972 states, 22971 states have (on average 3.84959296504288) internal successors, (88429), 22971 states have internal predecessors, (88429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:16,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22972 states to 22972 states and 88429 transitions. [2021-07-13 20:47:16,499 INFO L78 Accepts]: Start accepts. Automaton has 22972 states and 88429 transitions. Word has length 28 [2021-07-13 20:47:16,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:16,499 INFO L482 AbstractCegarLoop]: Abstraction has 22972 states and 88429 transitions. [2021-07-13 20:47:16,499 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 20:47:16,499 INFO L276 IsEmpty]: Start isEmpty. Operand 22972 states and 88429 transitions. [2021-07-13 20:47:16,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:47:16,541 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:16,541 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 20:47:16,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3599,209 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:16,757 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:16,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:16,758 INFO L82 PathProgramCache]: Analyzing trace with hash -2145545327, now seen corresponding path program 129 times [2021-07-13 20:47:16,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:16,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820916510] [2021-07-13 20:47:16,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:16,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:16,790 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 20:47:16,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:16,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820916510] [2021-07-13 20:47:16,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820916510] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:16,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116281547] [2021-07-13 20:47:16,790 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 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 20:47:16,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:47:16,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:16,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:47:16,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:16,876 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 20:47:16,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116281547] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:16,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:16,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-13 20:47:16,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834287293] [2021-07-13 20:47:16,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:47:16,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:16,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:47:16,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:47:16,877 INFO L87 Difference]: Start difference. First operand 22972 states and 88429 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 20:47:17,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:17,729 INFO L93 Difference]: Finished difference Result 30839 states and 113843 transitions. [2021-07-13 20:47:17,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 20:47:17,729 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 20:47:17,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:17,824 INFO L225 Difference]: With dead ends: 30839 [2021-07-13 20:47:17,824 INFO L226 Difference]: Without dead ends: 30839 [2021-07-13 20:47:17,824 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 455.5ms TimeCoverageRelationStatistics Valid=627, Invalid=2235, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:47:17,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30839 states. [2021-07-13 20:47:18,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30839 to 24204. [2021-07-13 20:47:18,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24204 states, 24203 states have (on average 3.8153534685782753) internal successors, (92343), 24203 states have internal predecessors, (92343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:18,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24204 states to 24204 states and 92343 transitions. [2021-07-13 20:47:18,687 INFO L78 Accepts]: Start accepts. Automaton has 24204 states and 92343 transitions. Word has length 28 [2021-07-13 20:47:18,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:18,687 INFO L482 AbstractCegarLoop]: Abstraction has 24204 states and 92343 transitions. [2021-07-13 20:47:18,687 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 20:47:18,687 INFO L276 IsEmpty]: Start isEmpty. Operand 24204 states and 92343 transitions. [2021-07-13 20:47:18,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:47:18,730 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:18,730 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 20:47:18,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3600,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:18,946 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:18,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:18,946 INFO L82 PathProgramCache]: Analyzing trace with hash -414511489, now seen corresponding path program 130 times [2021-07-13 20:47:18,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:18,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409271974] [2021-07-13 20:47:18,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:18,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:18,974 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 20:47:18,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:18,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409271974] [2021-07-13 20:47:18,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409271974] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:18,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623340548] [2021-07-13 20:47:18,974 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 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 20:47:19,004 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:47:19,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:19,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:47:19,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:19,144 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 20:47:19,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623340548] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:19,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:19,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:47:19,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400339013] [2021-07-13 20:47:19,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:47:19,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:19,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:47:19,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:47:19,145 INFO L87 Difference]: Start difference. First operand 24204 states and 92343 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 20:47:19,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:19,780 INFO L93 Difference]: Finished difference Result 29939 states and 111457 transitions. [2021-07-13 20:47:19,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:47:19,780 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 20:47:19,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:19,875 INFO L225 Difference]: With dead ends: 29939 [2021-07-13 20:47:19,875 INFO L226 Difference]: Without dead ends: 29931 [2021-07-13 20:47:19,876 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 259.4ms TimeCoverageRelationStatistics Valid=394, Invalid=1412, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:47:19,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29931 states. [2021-07-13 20:47:20,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29931 to 24026. [2021-07-13 20:47:20,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24026 states, 24025 states have (on average 3.821685744016649) internal successors, (91816), 24025 states have internal predecessors, (91816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:20,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24026 states to 24026 states and 91816 transitions. [2021-07-13 20:47:20,536 INFO L78 Accepts]: Start accepts. Automaton has 24026 states and 91816 transitions. Word has length 28 [2021-07-13 20:47:20,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:20,536 INFO L482 AbstractCegarLoop]: Abstraction has 24026 states and 91816 transitions. [2021-07-13 20:47:20,536 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 20:47:20,536 INFO L276 IsEmpty]: Start isEmpty. Operand 24026 states and 91816 transitions. [2021-07-13 20:47:20,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:47:20,732 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:20,733 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 20:47:20,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3601,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:20,948 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:20,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:20,949 INFO L82 PathProgramCache]: Analyzing trace with hash 44544553, now seen corresponding path program 131 times [2021-07-13 20:47:20,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:20,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626950506] [2021-07-13 20:47:20,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:20,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:20,991 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 20:47:20,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:20,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626950506] [2021-07-13 20:47:20,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626950506] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:20,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089005362] [2021-07-13 20:47:20,992 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 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 20:47:21,017 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:47:21,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:21,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:47:21,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:21,080 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 20:47:21,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089005362] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:21,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:21,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:47:21,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102767804] [2021-07-13 20:47:21,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:47:21,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:21,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:47:21,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:47:21,081 INFO L87 Difference]: Start difference. First operand 24026 states and 91816 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 20:47:22,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:22,014 INFO L93 Difference]: Finished difference Result 31774 states and 117062 transitions. [2021-07-13 20:47:22,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 20:47:22,014 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 20:47:22,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:22,115 INFO L225 Difference]: With dead ends: 31774 [2021-07-13 20:47:22,115 INFO L226 Difference]: Without dead ends: 31774 [2021-07-13 20:47:22,115 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 407.5ms TimeCoverageRelationStatistics Valid=566, Invalid=2086, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 20:47:22,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31774 states. [2021-07-13 20:47:22,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31774 to 25062. [2021-07-13 20:47:22,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25062 states, 25061 states have (on average 3.796416743146722) internal successors, (95142), 25061 states have internal predecessors, (95142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:22,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25062 states to 25062 states and 95142 transitions. [2021-07-13 20:47:22,905 INFO L78 Accepts]: Start accepts. Automaton has 25062 states and 95142 transitions. Word has length 28 [2021-07-13 20:47:22,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:22,905 INFO L482 AbstractCegarLoop]: Abstraction has 25062 states and 95142 transitions. [2021-07-13 20:47:22,905 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 20:47:22,905 INFO L276 IsEmpty]: Start isEmpty. Operand 25062 states and 95142 transitions. [2021-07-13 20:47:23,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:47:23,086 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:23,086 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 20:47:23,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3602,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:23,302 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:23,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:23,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1038478103, now seen corresponding path program 132 times [2021-07-13 20:47:23,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:23,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381734378] [2021-07-13 20:47:23,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:23,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:23,334 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 20:47:23,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:23,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381734378] [2021-07-13 20:47:23,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381734378] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:23,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894054381] [2021-07-13 20:47:23,335 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 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 20:47:23,363 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:47:23,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:23,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:47:23,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:23,410 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 20:47:23,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894054381] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:23,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:23,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-07-13 20:47:23,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293397496] [2021-07-13 20:47:23,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:47:23,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:23,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:47:23,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:47:23,411 INFO L87 Difference]: Start difference. First operand 25062 states and 95142 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 20:47:23,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:23,835 INFO L93 Difference]: Finished difference Result 30731 states and 115778 transitions. [2021-07-13 20:47:23,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:47:23,835 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 20:47:23,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:24,074 INFO L225 Difference]: With dead ends: 30731 [2021-07-13 20:47:24,074 INFO L226 Difference]: Without dead ends: 30718 [2021-07-13 20:47:24,075 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 131.5ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:47:24,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30718 states. [2021-07-13 20:47:24,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30718 to 29185. [2021-07-13 20:47:24,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29185 states, 29184 states have (on average 3.8150356359649122) internal successors, (111338), 29184 states have internal predecessors, (111338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:24,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29185 states to 29185 states and 111338 transitions. [2021-07-13 20:47:24,833 INFO L78 Accepts]: Start accepts. Automaton has 29185 states and 111338 transitions. Word has length 28 [2021-07-13 20:47:24,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:24,833 INFO L482 AbstractCegarLoop]: Abstraction has 29185 states and 111338 transitions. [2021-07-13 20:47:24,833 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 20:47:24,833 INFO L276 IsEmpty]: Start isEmpty. Operand 29185 states and 111338 transitions. [2021-07-13 20:47:25,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:47:25,001 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:25,001 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 20:47:25,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3603,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:25,217 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:25,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:25,217 INFO L82 PathProgramCache]: Analyzing trace with hash 432600015, now seen corresponding path program 133 times [2021-07-13 20:47:25,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:25,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042275694] [2021-07-13 20:47:25,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:25,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:25,247 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 20:47:25,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:25,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042275694] [2021-07-13 20:47:25,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042275694] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:25,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578502421] [2021-07-13 20:47:25,247 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 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 20:47:25,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:25,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:47:25,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:25,328 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 20:47:25,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578502421] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:25,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:25,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-07-13 20:47:25,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264159359] [2021-07-13 20:47:25,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:47:25,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:25,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:47:25,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:47:25,328 INFO L87 Difference]: Start difference. First operand 29185 states and 111338 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 20:47:25,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:25,729 INFO L93 Difference]: Finished difference Result 32194 states and 120690 transitions. [2021-07-13 20:47:25,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:47:25,730 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 20:47:25,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:26,005 INFO L225 Difference]: With dead ends: 32194 [2021-07-13 20:47:26,005 INFO L226 Difference]: Without dead ends: 32194 [2021-07-13 20:47:26,005 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 133.6ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:47:26,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32194 states. [2021-07-13 20:47:26,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32194 to 28930. [2021-07-13 20:47:26,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28930 states, 28929 states have (on average 3.8113657575443325) internal successors, (110259), 28929 states have internal predecessors, (110259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:26,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28930 states to 28930 states and 110259 transitions. [2021-07-13 20:47:26,790 INFO L78 Accepts]: Start accepts. Automaton has 28930 states and 110259 transitions. Word has length 28 [2021-07-13 20:47:26,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:26,791 INFO L482 AbstractCegarLoop]: Abstraction has 28930 states and 110259 transitions. [2021-07-13 20:47:26,791 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 20:47:26,791 INFO L276 IsEmpty]: Start isEmpty. Operand 28930 states and 110259 transitions. [2021-07-13 20:47:26,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:47:26,851 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:26,851 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 20:47:27,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3604 [2021-07-13 20:47:27,066 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:27,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:27,067 INFO L82 PathProgramCache]: Analyzing trace with hash 990664297, now seen corresponding path program 134 times [2021-07-13 20:47:27,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:27,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907253307] [2021-07-13 20:47:27,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:27,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:27,195 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-07-13 20:47:27,213 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 20:47:27,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:27,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907253307] [2021-07-13 20:47:27,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907253307] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:27,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378336551] [2021-07-13 20:47:27,213 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 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 20:47:27,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:47:27,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:27,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:47:27,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:27,319 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 20:47:27,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378336551] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:27,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:27,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:47:27,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761487557] [2021-07-13 20:47:27,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:47:27,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:27,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:47:27,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:47:27,320 INFO L87 Difference]: Start difference. First operand 28930 states and 110259 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 20:47:27,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:27,948 INFO L93 Difference]: Finished difference Result 35356 states and 131587 transitions. [2021-07-13 20:47:27,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:47:27,948 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 20:47:27,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:28,233 INFO L225 Difference]: With dead ends: 35356 [2021-07-13 20:47:28,233 INFO L226 Difference]: Without dead ends: 35348 [2021-07-13 20:47:28,233 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 376.9ms TimeCoverageRelationStatistics Valid=354, Invalid=1286, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:47:28,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35348 states. [2021-07-13 20:47:29,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35348 to 28896. [2021-07-13 20:47:29,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28896 states, 28895 states have (on average 3.8118013497144836) internal successors, (110142), 28895 states have internal predecessors, (110142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:29,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28896 states to 28896 states and 110142 transitions. [2021-07-13 20:47:29,197 INFO L78 Accepts]: Start accepts. Automaton has 28896 states and 110142 transitions. Word has length 28 [2021-07-13 20:47:29,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:29,197 INFO L482 AbstractCegarLoop]: Abstraction has 28896 states and 110142 transitions. [2021-07-13 20:47:29,197 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 20:47:29,197 INFO L276 IsEmpty]: Start isEmpty. Operand 28896 states and 110142 transitions. [2021-07-13 20:47:29,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:47:29,496 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:29,496 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 20:47:29,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3605,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:29,709 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:29,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:29,709 INFO L82 PathProgramCache]: Analyzing trace with hash -896097405, now seen corresponding path program 135 times [2021-07-13 20:47:29,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:29,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009687966] [2021-07-13 20:47:29,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:29,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:29,737 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 20:47:29,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:29,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009687966] [2021-07-13 20:47:29,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009687966] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:29,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199459696] [2021-07-13 20:47:29,737 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 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 20:47:29,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:47:29,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:29,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:47:29,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:29,802 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 20:47:29,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199459696] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:29,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:29,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-07-13 20:47:29,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172531221] [2021-07-13 20:47:29,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:47:29,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:29,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:47:29,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:47:29,803 INFO L87 Difference]: Start difference. First operand 28896 states and 110142 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 20:47:30,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:30,235 INFO L93 Difference]: Finished difference Result 31746 states and 119616 transitions. [2021-07-13 20:47:30,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:47:30,235 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 20:47:30,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:30,328 INFO L225 Difference]: With dead ends: 31746 [2021-07-13 20:47:30,329 INFO L226 Difference]: Without dead ends: 31746 [2021-07-13 20:47:30,329 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 168.0ms TimeCoverageRelationStatistics Valid=221, Invalid=535, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:47:30,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31746 states. [2021-07-13 20:47:31,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31746 to 29428. [2021-07-13 20:47:31,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29428 states, 29427 states have (on average 3.81031025928569) internal successors, (112126), 29427 states have internal predecessors, (112126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:31,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29428 states to 29428 states and 112126 transitions. [2021-07-13 20:47:31,146 INFO L78 Accepts]: Start accepts. Automaton has 29428 states and 112126 transitions. Word has length 28 [2021-07-13 20:47:31,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:31,146 INFO L482 AbstractCegarLoop]: Abstraction has 29428 states and 112126 transitions. [2021-07-13 20:47:31,146 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 20:47:31,146 INFO L276 IsEmpty]: Start isEmpty. Operand 29428 states and 112126 transitions. [2021-07-13 20:47:31,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:47:31,200 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:31,200 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 20:47:31,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3606 [2021-07-13 20:47:31,416 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:31,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:31,416 INFO L82 PathProgramCache]: Analyzing trace with hash 68962157, now seen corresponding path program 136 times [2021-07-13 20:47:31,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:31,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379980377] [2021-07-13 20:47:31,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:31,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:31,446 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 20:47:31,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:31,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379980377] [2021-07-13 20:47:31,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379980377] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:31,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660261683] [2021-07-13 20:47:31,446 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 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 20:47:31,469 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:47:31,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:31,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:47:31,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:31,518 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 20:47:31,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660261683] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:31,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:31,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:47:31,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856120108] [2021-07-13 20:47:31,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:47:31,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:31,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:47:31,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:47:31,518 INFO L87 Difference]: Start difference. First operand 29428 states and 112126 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 20:47:32,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:32,291 INFO L93 Difference]: Finished difference Result 36274 states and 134973 transitions. [2021-07-13 20:47:32,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:47:32,291 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 20:47:32,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:32,417 INFO L225 Difference]: With dead ends: 36274 [2021-07-13 20:47:32,417 INFO L226 Difference]: Without dead ends: 36250 [2021-07-13 20:47:32,417 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 379.8ms TimeCoverageRelationStatistics Valid=348, Invalid=1292, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:47:32,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36250 states. [2021-07-13 20:47:33,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36250 to 29600. [2021-07-13 20:47:33,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29600 states, 29599 states have (on average 3.8062096692455825) internal successors, (112660), 29599 states have internal predecessors, (112660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:33,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29600 states to 29600 states and 112660 transitions. [2021-07-13 20:47:33,436 INFO L78 Accepts]: Start accepts. Automaton has 29600 states and 112660 transitions. Word has length 28 [2021-07-13 20:47:33,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:33,436 INFO L482 AbstractCegarLoop]: Abstraction has 29600 states and 112660 transitions. [2021-07-13 20:47:33,436 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 20:47:33,436 INFO L276 IsEmpty]: Start isEmpty. Operand 29600 states and 112660 transitions. [2021-07-13 20:47:33,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:47:33,498 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:33,498 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 20:47:33,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3607 [2021-07-13 20:47:33,714 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:33,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:33,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1253949625, now seen corresponding path program 137 times [2021-07-13 20:47:33,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:33,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616393490] [2021-07-13 20:47:33,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:33,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:33,747 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 20:47:33,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:33,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616393490] [2021-07-13 20:47:33,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616393490] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:33,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804412887] [2021-07-13 20:47:33,747 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 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 20:47:33,774 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:47:33,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:33,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:47:33,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:33,823 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 20:47:33,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804412887] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:33,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:33,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-07-13 20:47:33,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24233551] [2021-07-13 20:47:33,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:47:33,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:33,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:47:33,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:47:33,836 INFO L87 Difference]: Start difference. First operand 29600 states and 112660 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 20:47:34,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:34,441 INFO L93 Difference]: Finished difference Result 32160 states and 121084 transitions. [2021-07-13 20:47:34,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:47:34,442 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 20:47:34,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:34,536 INFO L225 Difference]: With dead ends: 32160 [2021-07-13 20:47:34,536 INFO L226 Difference]: Without dead ends: 32160 [2021-07-13 20:47:34,536 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 318.4ms TimeCoverageRelationStatistics Valid=273, Invalid=657, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:47:34,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32160 states. [2021-07-13 20:47:35,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32160 to 29526. [2021-07-13 20:47:35,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29526 states, 29525 states have (on average 3.807078746824725) internal successors, (112404), 29525 states have internal predecessors, (112404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:35,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29526 states to 29526 states and 112404 transitions. [2021-07-13 20:47:35,534 INFO L78 Accepts]: Start accepts. Automaton has 29526 states and 112404 transitions. Word has length 28 [2021-07-13 20:47:35,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:35,534 INFO L482 AbstractCegarLoop]: Abstraction has 29526 states and 112404 transitions. [2021-07-13 20:47:35,534 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 20:47:35,534 INFO L276 IsEmpty]: Start isEmpty. Operand 29526 states and 112404 transitions. [2021-07-13 20:47:35,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:47:35,601 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:35,601 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 20:47:35,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3608 [2021-07-13 20:47:35,803 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:35,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:35,803 INFO L82 PathProgramCache]: Analyzing trace with hash -719397267, now seen corresponding path program 138 times [2021-07-13 20:47:35,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:35,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505786025] [2021-07-13 20:47:35,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:35,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:35,840 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 20:47:35,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:35,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505786025] [2021-07-13 20:47:35,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505786025] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:35,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529201875] [2021-07-13 20:47:35,840 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 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 20:47:35,866 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:47:35,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:35,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:47:35,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:35,928 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 20:47:35,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529201875] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:35,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:35,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-13 20:47:35,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070357953] [2021-07-13 20:47:35,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:47:35,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:35,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:47:35,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:47:35,929 INFO L87 Difference]: Start difference. First operand 29526 states and 112404 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 20:47:36,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:36,861 INFO L93 Difference]: Finished difference Result 36197 states and 134714 transitions. [2021-07-13 20:47:36,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:47:36,862 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 20:47:36,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:36,968 INFO L225 Difference]: With dead ends: 36197 [2021-07-13 20:47:36,969 INFO L226 Difference]: Without dead ends: 36157 [2021-07-13 20:47:36,969 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 353.2ms TimeCoverageRelationStatistics Valid=425, Invalid=1645, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:47:37,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36157 states. [2021-07-13 20:47:37,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36157 to 29682. [2021-07-13 20:47:37,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29682 states, 29681 states have (on average 3.8031737475152454) internal successors, (112882), 29681 states have internal predecessors, (112882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:38,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29682 states to 29682 states and 112882 transitions. [2021-07-13 20:47:38,089 INFO L78 Accepts]: Start accepts. Automaton has 29682 states and 112882 transitions. Word has length 28 [2021-07-13 20:47:38,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:38,089 INFO L482 AbstractCegarLoop]: Abstraction has 29682 states and 112882 transitions. [2021-07-13 20:47:38,089 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 20:47:38,089 INFO L276 IsEmpty]: Start isEmpty. Operand 29682 states and 112882 transitions. [2021-07-13 20:47:38,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:47:38,141 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:38,141 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 20:47:38,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3609 [2021-07-13 20:47:38,357 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:38,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:38,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1643440553, now seen corresponding path program 139 times [2021-07-13 20:47:38,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:38,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116800869] [2021-07-13 20:47:38,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:38,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:38,385 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 20:47:38,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:38,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116800869] [2021-07-13 20:47:38,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116800869] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:38,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158440803] [2021-07-13 20:47:38,386 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 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 20:47:38,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:38,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:47:38,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:38,503 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 20:47:38,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158440803] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:38,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:38,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:47:38,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708136072] [2021-07-13 20:47:38,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:47:38,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:38,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:47:38,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:47:38,504 INFO L87 Difference]: Start difference. First operand 29682 states and 112882 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 20:47:40,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:40,035 INFO L93 Difference]: Finished difference Result 67954 states and 250170 transitions. [2021-07-13 20:47:40,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-13 20:47:40,036 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 20:47:40,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:40,550 INFO L225 Difference]: With dead ends: 67954 [2021-07-13 20:47:40,550 INFO L226 Difference]: Without dead ends: 67954 [2021-07-13 20:47:40,551 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1801 ImplicationChecksByTransitivity, 801.2ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-07-13 20:47:40,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67954 states. [2021-07-13 20:47:42,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67954 to 37388. [2021-07-13 20:47:42,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37388 states, 37387 states have (on average 3.884772781983042) internal successors, (145240), 37387 states have internal predecessors, (145240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:42,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37388 states to 37388 states and 145240 transitions. [2021-07-13 20:47:42,170 INFO L78 Accepts]: Start accepts. Automaton has 37388 states and 145240 transitions. Word has length 28 [2021-07-13 20:47:42,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:42,170 INFO L482 AbstractCegarLoop]: Abstraction has 37388 states and 145240 transitions. [2021-07-13 20:47:42,170 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 20:47:42,171 INFO L276 IsEmpty]: Start isEmpty. Operand 37388 states and 145240 transitions. [2021-07-13 20:47:42,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:47:42,574 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:42,574 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 20:47:42,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3610,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:42,782 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:42,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:42,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1122622099, now seen corresponding path program 140 times [2021-07-13 20:47:42,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:42,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781133068] [2021-07-13 20:47:42,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:42,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:42,813 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 20:47:42,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:42,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781133068] [2021-07-13 20:47:42,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781133068] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:42,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928084846] [2021-07-13 20:47:42,813 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 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 20:47:42,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:47:42,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:42,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:47:42,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:42,929 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 20:47:42,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928084846] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:42,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:42,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:47:42,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199271509] [2021-07-13 20:47:42,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:47:42,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:42,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:47:42,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:47:42,930 INFO L87 Difference]: Start difference. First operand 37388 states and 145240 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 20:47:44,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:44,351 INFO L93 Difference]: Finished difference Result 67327 states and 248511 transitions. [2021-07-13 20:47:44,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-13 20:47:44,351 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 20:47:44,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:44,572 INFO L225 Difference]: With dead ends: 67327 [2021-07-13 20:47:44,572 INFO L226 Difference]: Without dead ends: 67327 [2021-07-13 20:47:44,572 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1802 ImplicationChecksByTransitivity, 598.1ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-07-13 20:47:44,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67327 states. [2021-07-13 20:47:46,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67327 to 37385. [2021-07-13 20:47:46,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37385 states, 37384 states have (on average 3.8847100363791998) internal successors, (145226), 37384 states have internal predecessors, (145226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:46,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37385 states to 37385 states and 145226 transitions. [2021-07-13 20:47:46,410 INFO L78 Accepts]: Start accepts. Automaton has 37385 states and 145226 transitions. Word has length 28 [2021-07-13 20:47:46,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:46,410 INFO L482 AbstractCegarLoop]: Abstraction has 37385 states and 145226 transitions. [2021-07-13 20:47:46,410 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 20:47:46,410 INFO L276 IsEmpty]: Start isEmpty. Operand 37385 states and 145226 transitions. [2021-07-13 20:47:46,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:47:46,483 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:46,483 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 20:47:46,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3611,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:46,697 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:46,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:46,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1038046775, now seen corresponding path program 141 times [2021-07-13 20:47:46,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:46,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854605021] [2021-07-13 20:47:46,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:46,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:46,725 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 20:47:46,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:46,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854605021] [2021-07-13 20:47:46,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854605021] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:46,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755880704] [2021-07-13 20:47:46,725 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 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 20:47:46,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:47:46,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:46,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:47:46,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:46,846 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 20:47:46,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755880704] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:46,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:46,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-13 20:47:46,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479274136] [2021-07-13 20:47:46,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:47:46,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:46,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:47:46,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:47:46,847 INFO L87 Difference]: Start difference. First operand 37385 states and 145226 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 20:47:48,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:48,392 INFO L93 Difference]: Finished difference Result 62746 states and 233002 transitions. [2021-07-13 20:47:48,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-13 20:47:48,392 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 20:47:48,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:48,627 INFO L225 Difference]: With dead ends: 62746 [2021-07-13 20:47:48,627 INFO L226 Difference]: Without dead ends: 62746 [2021-07-13 20:47:48,627 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 568.4ms TimeCoverageRelationStatistics Valid=944, Invalid=3216, Unknown=0, NotChecked=0, Total=4160 [2021-07-13 20:47:48,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62746 states. [2021-07-13 20:47:50,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62746 to 37407. [2021-07-13 20:47:50,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37407 states, 37406 states have (on average 3.8850184462385715) internal successors, (145323), 37406 states have internal predecessors, (145323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:50,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37407 states to 37407 states and 145323 transitions. [2021-07-13 20:47:50,260 INFO L78 Accepts]: Start accepts. Automaton has 37407 states and 145323 transitions. Word has length 28 [2021-07-13 20:47:50,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:50,260 INFO L482 AbstractCegarLoop]: Abstraction has 37407 states and 145323 transitions. [2021-07-13 20:47:50,260 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 20:47:50,260 INFO L276 IsEmpty]: Start isEmpty. Operand 37407 states and 145323 transitions. [2021-07-13 20:47:50,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:47:50,529 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:50,529 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 20:47:50,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3612 [2021-07-13 20:47:50,745 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:50,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:50,745 INFO L82 PathProgramCache]: Analyzing trace with hash 2110363749, now seen corresponding path program 142 times [2021-07-13 20:47:50,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:50,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093538224] [2021-07-13 20:47:50,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:50,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:50,773 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 20:47:50,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:50,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093538224] [2021-07-13 20:47:50,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093538224] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:50,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124703827] [2021-07-13 20:47:50,774 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 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 20:47:50,798 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:47:50,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:50,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:47:50,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:50,879 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 20:47:50,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124703827] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:50,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:50,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-13 20:47:50,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737150718] [2021-07-13 20:47:50,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:47:50,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:50,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:47:50,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:47:50,879 INFO L87 Difference]: Start difference. First operand 37407 states and 145323 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 20:47:52,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:52,146 INFO L93 Difference]: Finished difference Result 61875 states and 230752 transitions. [2021-07-13 20:47:52,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-13 20:47:52,146 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 20:47:52,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:52,365 INFO L225 Difference]: With dead ends: 61875 [2021-07-13 20:47:52,365 INFO L226 Difference]: Without dead ends: 61867 [2021-07-13 20:47:52,365 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 482.1ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 20:47:52,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61867 states. [2021-07-13 20:47:53,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61867 to 37407. [2021-07-13 20:47:53,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37407 states, 37406 states have (on average 3.8848580441640377) internal successors, (145317), 37406 states have internal predecessors, (145317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:54,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37407 states to 37407 states and 145317 transitions. [2021-07-13 20:47:54,272 INFO L78 Accepts]: Start accepts. Automaton has 37407 states and 145317 transitions. Word has length 28 [2021-07-13 20:47:54,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:54,272 INFO L482 AbstractCegarLoop]: Abstraction has 37407 states and 145317 transitions. [2021-07-13 20:47:54,272 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 20:47:54,272 INFO L276 IsEmpty]: Start isEmpty. Operand 37407 states and 145317 transitions. [2021-07-13 20:47:54,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:47:54,349 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:54,349 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 20:47:54,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3613,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:54,564 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:54,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:54,565 INFO L82 PathProgramCache]: Analyzing trace with hash 104546025, now seen corresponding path program 143 times [2021-07-13 20:47:54,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:54,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10341170] [2021-07-13 20:47:54,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:54,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:54,592 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 20:47:54,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:54,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10341170] [2021-07-13 20:47:54,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10341170] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:54,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469177882] [2021-07-13 20:47:54,592 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 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 20:47:54,621 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:47:54,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:54,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:47:54,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:54,721 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 20:47:54,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469177882] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:54,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:54,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:47:54,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031381904] [2021-07-13 20:47:54,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:47:54,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:54,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:47:54,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:47:54,722 INFO L87 Difference]: Start difference. First operand 37407 states and 145317 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 20:47:55,746 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2021-07-13 20:47:56,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:56,147 INFO L93 Difference]: Finished difference Result 61558 states and 229893 transitions. [2021-07-13 20:47:56,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-13 20:47:56,147 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 28 [2021-07-13 20:47:56,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:56,376 INFO L225 Difference]: With dead ends: 61558 [2021-07-13 20:47:56,376 INFO L226 Difference]: Without dead ends: 61558 [2021-07-13 20:47:56,376 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1363 ImplicationChecksByTransitivity, 798.5ms TimeCoverageRelationStatistics Valid=872, Invalid=3034, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 20:47:56,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61558 states. [2021-07-13 20:47:58,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61558 to 37415. [2021-07-13 20:47:58,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37415 states, 37414 states have (on average 3.8849361201689208) internal successors, (145351), 37414 states have internal predecessors, (145351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:58,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37415 states to 37415 states and 145351 transitions. [2021-07-13 20:47:58,173 INFO L78 Accepts]: Start accepts. Automaton has 37415 states and 145351 transitions. Word has length 28 [2021-07-13 20:47:58,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:58,173 INFO L482 AbstractCegarLoop]: Abstraction has 37415 states and 145351 transitions. [2021-07-13 20:47:58,173 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 20:47:58,173 INFO L276 IsEmpty]: Start isEmpty. Operand 37415 states and 145351 transitions. [2021-07-13 20:47:58,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:47:58,252 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:58,253 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 20:47:58,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3614 [2021-07-13 20:47:58,469 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:58,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:58,469 INFO L82 PathProgramCache]: Analyzing trace with hash -950831369, now seen corresponding path program 144 times [2021-07-13 20:47:58,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:58,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618606964] [2021-07-13 20:47:58,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:58,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:58,524 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 20:47:58,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:58,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618606964] [2021-07-13 20:47:58,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618606964] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:58,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886701495] [2021-07-13 20:47:58,525 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 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 20:47:58,553 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:47:58,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:58,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:47:58,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:58,629 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 20:47:58,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886701495] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:58,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:58,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:47:58,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725663871] [2021-07-13 20:47:58,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:47:58,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:58,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:47:58,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:47:58,630 INFO L87 Difference]: Start difference. First operand 37415 states and 145351 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 20:47:59,321 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2021-07-13 20:47:59,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:59,811 INFO L93 Difference]: Finished difference Result 61347 states and 229367 transitions. [2021-07-13 20:47:59,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-13 20:47:59,812 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 28 [2021-07-13 20:47:59,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:00,050 INFO L225 Difference]: With dead ends: 61347 [2021-07-13 20:48:00,050 INFO L226 Difference]: Without dead ends: 61339 [2021-07-13 20:48:00,051 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1131 ImplicationChecksByTransitivity, 604.6ms TimeCoverageRelationStatistics Valid=767, Invalid=2539, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:48:00,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61339 states. [2021-07-13 20:48:01,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61339 to 37415. [2021-07-13 20:48:01,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37415 states, 37414 states have (on average 3.884882664243331) internal successors, (145349), 37414 states have internal predecessors, (145349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:01,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37415 states to 37415 states and 145349 transitions. [2021-07-13 20:48:01,813 INFO L78 Accepts]: Start accepts. Automaton has 37415 states and 145349 transitions. Word has length 28 [2021-07-13 20:48:01,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:01,813 INFO L482 AbstractCegarLoop]: Abstraction has 37415 states and 145349 transitions. [2021-07-13 20:48:01,813 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 20:48:01,813 INFO L276 IsEmpty]: Start isEmpty. Operand 37415 states and 145349 transitions. [2021-07-13 20:48:01,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:48:01,886 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:01,886 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 20:48:02,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3615,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:02,101 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:02,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:02,101 INFO L82 PathProgramCache]: Analyzing trace with hash 401579921, now seen corresponding path program 145 times [2021-07-13 20:48:02,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:02,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830149461] [2021-07-13 20:48:02,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:02,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:02,130 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 20:48:02,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:02,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830149461] [2021-07-13 20:48:02,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830149461] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:02,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752818075] [2021-07-13 20:48:02,131 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 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 20:48:02,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:02,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:48:02,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:02,225 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 20:48:02,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752818075] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:02,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:02,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-07-13 20:48:02,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312988146] [2021-07-13 20:48:02,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:48:02,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:02,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:48:02,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:48:02,226 INFO L87 Difference]: Start difference. First operand 37415 states and 145349 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 20:48:03,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:03,633 INFO L93 Difference]: Finished difference Result 60787 states and 225952 transitions. [2021-07-13 20:48:03,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-13 20:48:03,634 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 20:48:03,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:04,163 INFO L225 Difference]: With dead ends: 60787 [2021-07-13 20:48:04,163 INFO L226 Difference]: Without dead ends: 60787 [2021-07-13 20:48:04,163 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 580.7ms TimeCoverageRelationStatistics Valid=978, Invalid=3714, Unknown=0, NotChecked=0, Total=4692 [2021-07-13 20:48:04,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60787 states. [2021-07-13 20:48:05,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60787 to 40214. [2021-07-13 20:48:05,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40214 states, 40213 states have (on average 3.8890159898540273) internal successors, (156389), 40213 states have internal predecessors, (156389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:05,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40214 states to 40214 states and 156389 transitions. [2021-07-13 20:48:05,762 INFO L78 Accepts]: Start accepts. Automaton has 40214 states and 156389 transitions. Word has length 28 [2021-07-13 20:48:05,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:05,762 INFO L482 AbstractCegarLoop]: Abstraction has 40214 states and 156389 transitions. [2021-07-13 20:48:05,762 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 20:48:05,762 INFO L276 IsEmpty]: Start isEmpty. Operand 40214 states and 156389 transitions. [2021-07-13 20:48:05,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:48:05,852 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:05,852 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 20:48:06,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3616 [2021-07-13 20:48:06,068 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:06,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:06,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1473896895, now seen corresponding path program 146 times [2021-07-13 20:48:06,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:06,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316006692] [2021-07-13 20:48:06,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:06,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:06,098 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 20:48:06,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:06,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316006692] [2021-07-13 20:48:06,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316006692] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:06,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729624545] [2021-07-13 20:48:06,099 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 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 20:48:06,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:48:06,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:06,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:48:06,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:06,196 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 20:48:06,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729624545] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:06,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:06,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-07-13 20:48:06,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381021805] [2021-07-13 20:48:06,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:48:06,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:06,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:48:06,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:48:06,197 INFO L87 Difference]: Start difference. First operand 40214 states and 156389 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 20:48:07,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:07,447 INFO L93 Difference]: Finished difference Result 60310 states and 224694 transitions. [2021-07-13 20:48:07,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-13 20:48:07,448 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 20:48:07,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:08,014 INFO L225 Difference]: With dead ends: 60310 [2021-07-13 20:48:08,014 INFO L226 Difference]: Without dead ends: 60302 [2021-07-13 20:48:08,015 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 465.4ms TimeCoverageRelationStatistics Valid=736, Invalid=2804, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:48:08,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60302 states. [2021-07-13 20:48:10,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60302 to 39928. [2021-07-13 20:48:10,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39928 states, 39927 states have (on average 3.8946577503944697) internal successors, (155502), 39927 states have internal predecessors, (155502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:10,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39928 states to 39928 states and 155502 transitions. [2021-07-13 20:48:10,194 INFO L78 Accepts]: Start accepts. Automaton has 39928 states and 155502 transitions. Word has length 28 [2021-07-13 20:48:10,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:10,194 INFO L482 AbstractCegarLoop]: Abstraction has 39928 states and 155502 transitions. [2021-07-13 20:48:10,194 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 20:48:10,194 INFO L276 IsEmpty]: Start isEmpty. Operand 39928 states and 155502 transitions. [2021-07-13 20:48:10,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:48:10,269 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:10,269 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 20:48:10,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3617,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:10,485 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:10,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:10,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1560233875, now seen corresponding path program 147 times [2021-07-13 20:48:10,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:10,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014929150] [2021-07-13 20:48:10,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:10,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:10,517 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 20:48:10,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:10,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014929150] [2021-07-13 20:48:10,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014929150] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:10,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925413431] [2021-07-13 20:48:10,517 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 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 20:48:10,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:48:10,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:10,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:48:10,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:10,621 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 20:48:10,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925413431] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:10,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:10,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-07-13 20:48:10,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069036616] [2021-07-13 20:48:10,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:48:10,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:10,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:48:10,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:48:10,623 INFO L87 Difference]: Start difference. First operand 39928 states and 155502 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 20:48:11,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:11,763 INFO L93 Difference]: Finished difference Result 58857 states and 220695 transitions. [2021-07-13 20:48:11,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:48:11,763 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 20:48:11,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:11,988 INFO L225 Difference]: With dead ends: 58857 [2021-07-13 20:48:11,988 INFO L226 Difference]: Without dead ends: 58833 [2021-07-13 20:48:11,989 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 564.6ms TimeCoverageRelationStatistics Valid=498, Invalid=1758, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:48:12,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58833 states. [2021-07-13 20:48:13,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58833 to 39834. [2021-07-13 20:48:13,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39834 states, 39833 states have (on average 3.894635101548967) internal successors, (155135), 39833 states have internal predecessors, (155135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:13,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39834 states to 39834 states and 155135 transitions. [2021-07-13 20:48:13,889 INFO L78 Accepts]: Start accepts. Automaton has 39834 states and 155135 transitions. Word has length 28 [2021-07-13 20:48:13,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:13,889 INFO L482 AbstractCegarLoop]: Abstraction has 39834 states and 155135 transitions. [2021-07-13 20:48:13,889 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 20:48:13,889 INFO L276 IsEmpty]: Start isEmpty. Operand 39834 states and 155135 transitions. [2021-07-13 20:48:14,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:48:14,061 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:14,061 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 20:48:14,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3618,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:14,282 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:14,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:14,283 INFO L82 PathProgramCache]: Analyzing trace with hash -887947539, now seen corresponding path program 148 times [2021-07-13 20:48:14,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:14,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145298963] [2021-07-13 20:48:14,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:14,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:14,313 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 20:48:14,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:14,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145298963] [2021-07-13 20:48:14,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145298963] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:14,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419599330] [2021-07-13 20:48:14,313 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 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 20:48:14,337 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:48:14,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:14,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:48:14,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:14,442 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 20:48:14,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419599330] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:14,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:14,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:48:14,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344225851] [2021-07-13 20:48:14,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:48:14,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:14,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:48:14,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:48:14,443 INFO L87 Difference]: Start difference. First operand 39834 states and 155135 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 20:48:15,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:15,900 INFO L93 Difference]: Finished difference Result 60084 states and 224060 transitions. [2021-07-13 20:48:15,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-07-13 20:48:15,900 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 28 [2021-07-13 20:48:15,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:16,317 INFO L225 Difference]: With dead ends: 60084 [2021-07-13 20:48:16,317 INFO L226 Difference]: Without dead ends: 60084 [2021-07-13 20:48:16,318 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 598.5ms TimeCoverageRelationStatistics Valid=878, Invalid=3412, Unknown=0, NotChecked=0, Total=4290 [2021-07-13 20:48:16,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60084 states. [2021-07-13 20:48:17,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60084 to 39930. [2021-07-13 20:48:17,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39930 states, 39929 states have (on average 3.8931353151844523) internal successors, (155449), 39929 states have internal predecessors, (155449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:17,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39930 states to 39930 states and 155449 transitions. [2021-07-13 20:48:17,901 INFO L78 Accepts]: Start accepts. Automaton has 39930 states and 155449 transitions. Word has length 28 [2021-07-13 20:48:17,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:17,901 INFO L482 AbstractCegarLoop]: Abstraction has 39930 states and 155449 transitions. [2021-07-13 20:48:17,901 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 20:48:17,901 INFO L276 IsEmpty]: Start isEmpty. Operand 39930 states and 155449 transitions. [2021-07-13 20:48:17,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:48:17,988 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:17,988 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 20:48:18,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3619 [2021-07-13 20:48:18,205 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:18,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:18,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1943324933, now seen corresponding path program 149 times [2021-07-13 20:48:18,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:18,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574124462] [2021-07-13 20:48:18,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:18,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:18,235 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 20:48:18,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:18,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574124462] [2021-07-13 20:48:18,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574124462] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:18,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498583098] [2021-07-13 20:48:18,235 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 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 20:48:18,259 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:48:18,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:18,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:48:18,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:18,357 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 20:48:18,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498583098] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:18,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:18,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:48:18,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55024644] [2021-07-13 20:48:18,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:48:18,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:18,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:48:18,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:48:18,358 INFO L87 Difference]: Start difference. First operand 39930 states and 155449 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 20:48:19,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:19,574 INFO L93 Difference]: Finished difference Result 59771 states and 223172 transitions. [2021-07-13 20:48:19,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 20:48:19,575 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 28 [2021-07-13 20:48:19,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:20,117 INFO L225 Difference]: With dead ends: 59771 [2021-07-13 20:48:20,117 INFO L226 Difference]: Without dead ends: 59763 [2021-07-13 20:48:20,118 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 658.2ms TimeCoverageRelationStatistics Valid=716, Invalid=2590, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:48:20,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59763 states. [2021-07-13 20:48:21,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59763 to 39858. [2021-07-13 20:48:21,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39858 states, 39857 states have (on average 3.894598188523973) internal successors, (155227), 39857 states have internal predecessors, (155227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:21,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39858 states to 39858 states and 155227 transitions. [2021-07-13 20:48:21,700 INFO L78 Accepts]: Start accepts. Automaton has 39858 states and 155227 transitions. Word has length 28 [2021-07-13 20:48:21,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:21,700 INFO L482 AbstractCegarLoop]: Abstraction has 39858 states and 155227 transitions. [2021-07-13 20:48:21,700 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 20:48:21,700 INFO L276 IsEmpty]: Start isEmpty. Operand 39858 states and 155227 transitions. [2021-07-13 20:48:21,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:48:21,777 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:21,777 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 20:48:21,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3620,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:21,993 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:21,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:21,993 INFO L82 PathProgramCache]: Analyzing trace with hash -460189995, now seen corresponding path program 150 times [2021-07-13 20:48:21,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:21,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086294393] [2021-07-13 20:48:21,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:21,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:22,023 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 20:48:22,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:22,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086294393] [2021-07-13 20:48:22,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086294393] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:22,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473974074] [2021-07-13 20:48:22,023 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 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 20:48:22,045 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:48:22,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:22,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:48:22,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:22,122 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 20:48:22,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473974074] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:22,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:22,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-13 20:48:22,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503544961] [2021-07-13 20:48:22,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:48:22,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:22,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:48:22,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:48:22,123 INFO L87 Difference]: Start difference. First operand 39858 states and 155227 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 20:48:23,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:23,216 INFO L93 Difference]: Finished difference Result 58502 states and 219661 transitions. [2021-07-13 20:48:23,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:48:23,217 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 20:48:23,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:23,440 INFO L225 Difference]: With dead ends: 58502 [2021-07-13 20:48:23,440 INFO L226 Difference]: Without dead ends: 58478 [2021-07-13 20:48:23,441 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 554.9ms TimeCoverageRelationStatistics Valid=487, Invalid=1675, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:48:23,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58478 states. [2021-07-13 20:48:25,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58478 to 39834. [2021-07-13 20:48:25,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39834 states, 39833 states have (on average 3.8947355207993373) internal successors, (155139), 39833 states have internal predecessors, (155139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:25,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39834 states to 39834 states and 155139 transitions. [2021-07-13 20:48:25,312 INFO L78 Accepts]: Start accepts. Automaton has 39834 states and 155139 transitions. Word has length 28 [2021-07-13 20:48:25,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:25,312 INFO L482 AbstractCegarLoop]: Abstraction has 39834 states and 155139 transitions. [2021-07-13 20:48:25,312 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 20:48:25,312 INFO L276 IsEmpty]: Start isEmpty. Operand 39834 states and 155139 transitions. [2021-07-13 20:48:25,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:48:25,379 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:25,379 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 20:48:25,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3621 [2021-07-13 20:48:25,593 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:25,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:25,594 INFO L82 PathProgramCache]: Analyzing trace with hash 117906837, now seen corresponding path program 151 times [2021-07-13 20:48:25,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:25,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131776064] [2021-07-13 20:48:25,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:25,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:25,630 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 20:48:25,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:25,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131776064] [2021-07-13 20:48:25,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131776064] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:25,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281407538] [2021-07-13 20:48:25,631 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 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 20:48:25,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:25,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:48:25,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:25,729 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 20:48:25,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281407538] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:25,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:25,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 20:48:25,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955641847] [2021-07-13 20:48:25,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:48:25,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:25,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:48:25,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:48:25,729 INFO L87 Difference]: Start difference. First operand 39834 states and 155139 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 20:48:27,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:27,306 INFO L93 Difference]: Finished difference Result 61684 states and 228711 transitions. [2021-07-13 20:48:27,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-07-13 20:48:27,306 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 20:48:27,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:27,527 INFO L225 Difference]: With dead ends: 61684 [2021-07-13 20:48:27,527 INFO L226 Difference]: Without dead ends: 61684 [2021-07-13 20:48:27,528 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2861 ImplicationChecksByTransitivity, 662.2ms TimeCoverageRelationStatistics Valid=1421, Invalid=5889, Unknown=0, NotChecked=0, Total=7310 [2021-07-13 20:48:27,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61684 states. [2021-07-13 20:48:28,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61684 to 44178. [2021-07-13 20:48:29,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44178 states, 44177 states have (on average 3.844376032777237) internal successors, (169833), 44177 states have internal predecessors, (169833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:29,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44178 states to 44178 states and 169833 transitions. [2021-07-13 20:48:29,468 INFO L78 Accepts]: Start accepts. Automaton has 44178 states and 169833 transitions. Word has length 28 [2021-07-13 20:48:29,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:29,468 INFO L482 AbstractCegarLoop]: Abstraction has 44178 states and 169833 transitions. [2021-07-13 20:48:29,468 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 20:48:29,468 INFO L276 IsEmpty]: Start isEmpty. Operand 44178 states and 169833 transitions. [2021-07-13 20:48:29,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:48:29,565 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:29,565 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 20:48:29,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3622,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:29,768 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:29,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:29,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1190223811, now seen corresponding path program 152 times [2021-07-13 20:48:29,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:29,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480743006] [2021-07-13 20:48:29,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:29,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:29,800 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 20:48:29,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:29,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480743006] [2021-07-13 20:48:29,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480743006] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:29,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496439025] [2021-07-13 20:48:29,801 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 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 20:48:29,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:48:29,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:29,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:48:29,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:29,876 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 20:48:29,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496439025] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:29,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:29,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 20:48:29,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152693988] [2021-07-13 20:48:29,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:48:29,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:29,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:48:29,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:48:29,877 INFO L87 Difference]: Start difference. First operand 44178 states and 169833 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 20:48:31,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:31,184 INFO L93 Difference]: Finished difference Result 60908 states and 226590 transitions. [2021-07-13 20:48:31,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-13 20:48:31,184 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 20:48:31,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:31,385 INFO L225 Difference]: With dead ends: 60908 [2021-07-13 20:48:31,385 INFO L226 Difference]: Without dead ends: 60900 [2021-07-13 20:48:31,385 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1934 ImplicationChecksByTransitivity, 557.5ms TimeCoverageRelationStatistics Valid=1035, Invalid=4221, Unknown=0, NotChecked=0, Total=5256 [2021-07-13 20:48:31,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60900 states. [2021-07-13 20:48:33,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60900 to 43034. [2021-07-13 20:48:33,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43034 states, 43033 states have (on average 3.86408105407478) internal successors, (166283), 43033 states have internal predecessors, (166283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:33,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43034 states to 43034 states and 166283 transitions. [2021-07-13 20:48:33,225 INFO L78 Accepts]: Start accepts. Automaton has 43034 states and 166283 transitions. Word has length 28 [2021-07-13 20:48:33,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:33,225 INFO L482 AbstractCegarLoop]: Abstraction has 43034 states and 166283 transitions. [2021-07-13 20:48:33,226 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 20:48:33,226 INFO L276 IsEmpty]: Start isEmpty. Operand 43034 states and 166283 transitions. [2021-07-13 20:48:33,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:48:33,311 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:33,311 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 20:48:33,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3623 [2021-07-13 20:48:33,525 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:33,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:33,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1843906959, now seen corresponding path program 153 times [2021-07-13 20:48:33,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:33,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953991511] [2021-07-13 20:48:33,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:33,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:33,559 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 20:48:33,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:33,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953991511] [2021-07-13 20:48:33,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953991511] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:33,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429952465] [2021-07-13 20:48:33,560 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 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 20:48:33,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:48:33,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:33,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:48:33,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:33,641 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 20:48:33,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429952465] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:33,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:33,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 20:48:33,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120577003] [2021-07-13 20:48:33,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:48:33,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:33,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:48:33,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:48:33,642 INFO L87 Difference]: Start difference. First operand 43034 states and 166283 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 20:48:34,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:34,991 INFO L93 Difference]: Finished difference Result 59247 states and 221971 transitions. [2021-07-13 20:48:34,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-13 20:48:34,991 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 20:48:35,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:35,214 INFO L225 Difference]: With dead ends: 59247 [2021-07-13 20:48:35,214 INFO L226 Difference]: Without dead ends: 59223 [2021-07-13 20:48:35,215 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1368 ImplicationChecksByTransitivity, 808.4ms TimeCoverageRelationStatistics Valid=814, Invalid=3218, Unknown=0, NotChecked=0, Total=4032 [2021-07-13 20:48:35,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59223 states. [2021-07-13 20:48:36,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59223 to 43046. [2021-07-13 20:48:36,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43046 states, 43045 states have (on average 3.8619351841096528) internal successors, (166237), 43045 states have internal predecessors, (166237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:36,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43046 states to 43046 states and 166237 transitions. [2021-07-13 20:48:36,985 INFO L78 Accepts]: Start accepts. Automaton has 43046 states and 166237 transitions. Word has length 28 [2021-07-13 20:48:36,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:36,985 INFO L482 AbstractCegarLoop]: Abstraction has 43046 states and 166237 transitions. [2021-07-13 20:48:36,985 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 20:48:36,985 INFO L276 IsEmpty]: Start isEmpty. Operand 43046 states and 166237 transitions. [2021-07-13 20:48:37,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:48:37,066 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:37,066 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 20:48:37,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3624,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:37,282 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:37,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:37,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1653229165, now seen corresponding path program 154 times [2021-07-13 20:48:37,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:37,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862321727] [2021-07-13 20:48:37,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:37,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:37,318 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 20:48:37,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:37,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862321727] [2021-07-13 20:48:37,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862321727] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:37,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347202591] [2021-07-13 20:48:37,318 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 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 20:48:37,342 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:48:37,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:37,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:48:37,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:37,398 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 20:48:37,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347202591] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:37,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:37,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 20:48:37,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957456739] [2021-07-13 20:48:37,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:48:37,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:37,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:48:37,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:48:37,399 INFO L87 Difference]: Start difference. First operand 43046 states and 166237 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 20:48:38,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:38,736 INFO L93 Difference]: Finished difference Result 60535 states and 225583 transitions. [2021-07-13 20:48:38,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-13 20:48:38,737 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 20:48:38,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:39,182 INFO L225 Difference]: With dead ends: 60535 [2021-07-13 20:48:39,182 INFO L226 Difference]: Without dead ends: 60495 [2021-07-13 20:48:39,183 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1158 ImplicationChecksByTransitivity, 522.2ms TimeCoverageRelationStatistics Valid=722, Invalid=2818, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:48:39,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60495 states. [2021-07-13 20:48:40,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60495 to 43178. [2021-07-13 20:48:40,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43178 states, 43177 states have (on average 3.861245570558399) internal successors, (166717), 43177 states have internal predecessors, (166717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:40,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43178 states to 43178 states and 166717 transitions. [2021-07-13 20:48:40,713 INFO L78 Accepts]: Start accepts. Automaton has 43178 states and 166717 transitions. Word has length 28 [2021-07-13 20:48:40,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:40,714 INFO L482 AbstractCegarLoop]: Abstraction has 43178 states and 166717 transitions. [2021-07-13 20:48:40,714 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 20:48:40,714 INFO L276 IsEmpty]: Start isEmpty. Operand 43178 states and 166717 transitions. [2021-07-13 20:48:40,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:48:40,797 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:40,797 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 20:48:41,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3625 [2021-07-13 20:48:41,013 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:41,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:41,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1707857389, now seen corresponding path program 155 times [2021-07-13 20:48:41,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:41,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724892335] [2021-07-13 20:48:41,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:41,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:41,050 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 20:48:41,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:41,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724892335] [2021-07-13 20:48:41,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724892335] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:41,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398350080] [2021-07-13 20:48:41,050 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 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 20:48:41,075 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:48:41,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:41,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:48:41,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:41,189 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 20:48:41,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398350080] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:41,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:41,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 20:48:41,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783013981] [2021-07-13 20:48:41,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:48:41,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:41,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:48:41,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:48:41,190 INFO L87 Difference]: Start difference. First operand 43178 states and 166717 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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 20:48:41,667 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 9 [2021-07-13 20:48:43,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:43,123 INFO L93 Difference]: Finished difference Result 59754 states and 223244 transitions. [2021-07-13 20:48:43,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-07-13 20:48:43,123 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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 20:48:43,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:43,340 INFO L225 Difference]: With dead ends: 59754 [2021-07-13 20:48:43,340 INFO L226 Difference]: Without dead ends: 59754 [2021-07-13 20:48:43,340 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2488 ImplicationChecksByTransitivity, 1139.8ms TimeCoverageRelationStatistics Valid=1250, Invalid=5392, Unknown=0, NotChecked=0, Total=6642 [2021-07-13 20:48:43,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59754 states. [2021-07-13 20:48:44,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59754 to 44087. [2021-07-13 20:48:44,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44087 states, 44086 states have (on average 3.851517488545116) internal successors, (169798), 44086 states have internal predecessors, (169798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:45,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44087 states to 44087 states and 169798 transitions. [2021-07-13 20:48:45,139 INFO L78 Accepts]: Start accepts. Automaton has 44087 states and 169798 transitions. Word has length 28 [2021-07-13 20:48:45,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:45,139 INFO L482 AbstractCegarLoop]: Abstraction has 44087 states and 169798 transitions. [2021-07-13 20:48:45,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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 20:48:45,139 INFO L276 IsEmpty]: Start isEmpty. Operand 44087 states and 169798 transitions. [2021-07-13 20:48:45,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:48:45,253 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:45,253 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 20:48:45,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3626,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:45,465 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:45,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:45,465 INFO L82 PathProgramCache]: Analyzing trace with hash 652479995, now seen corresponding path program 156 times [2021-07-13 20:48:45,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:45,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337666952] [2021-07-13 20:48:45,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:45,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:45,506 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 20:48:45,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:45,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337666952] [2021-07-13 20:48:45,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337666952] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:45,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374312646] [2021-07-13 20:48:45,506 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 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 20:48:45,532 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:48:45,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:45,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:48:45,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:45,639 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 20:48:45,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374312646] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:45,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:45,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 20:48:45,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930688167] [2021-07-13 20:48:45,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:48:45,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:45,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:48:45,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:48:45,640 INFO L87 Difference]: Start difference. First operand 44087 states and 169798 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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 20:48:47,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:47,019 INFO L93 Difference]: Finished difference Result 59256 states and 221849 transitions. [2021-07-13 20:48:47,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-13 20:48:47,019 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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 20:48:47,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:47,227 INFO L225 Difference]: With dead ends: 59256 [2021-07-13 20:48:47,227 INFO L226 Difference]: Without dead ends: 59248 [2021-07-13 20:48:47,227 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1724 ImplicationChecksByTransitivity, 621.0ms TimeCoverageRelationStatistics Valid=973, Invalid=3857, Unknown=0, NotChecked=0, Total=4830 [2021-07-13 20:48:47,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59248 states. [2021-07-13 20:48:48,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59248 to 44011. [2021-07-13 20:48:48,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44011 states, 44010 states have (on average 3.8528061804135425) internal successors, (169562), 44010 states have internal predecessors, (169562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:49,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44011 states to 44011 states and 169562 transitions. [2021-07-13 20:48:49,269 INFO L78 Accepts]: Start accepts. Automaton has 44011 states and 169562 transitions. Word has length 28 [2021-07-13 20:48:49,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:49,269 INFO L482 AbstractCegarLoop]: Abstraction has 44011 states and 169562 transitions. [2021-07-13 20:48:49,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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 20:48:49,269 INFO L276 IsEmpty]: Start isEmpty. Operand 44011 states and 169562 transitions. [2021-07-13 20:48:49,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:48:49,353 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:49,353 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 20:48:49,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3627 [2021-07-13 20:48:49,569 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:49,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:49,569 INFO L82 PathProgramCache]: Analyzing trace with hash 2135614933, now seen corresponding path program 157 times [2021-07-13 20:48:49,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:49,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873288260] [2021-07-13 20:48:49,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:49,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:49,603 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 20:48:49,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:49,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873288260] [2021-07-13 20:48:49,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873288260] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:49,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623447976] [2021-07-13 20:48:49,603 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 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 20:48:49,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:49,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:48:49,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:49,712 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 20:48:49,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623447976] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:49,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:49,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:48:49,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171314105] [2021-07-13 20:48:49,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:48:49,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:49,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:48:49,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:48:49,713 INFO L87 Difference]: Start difference. First operand 44011 states and 169562 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 20:48:51,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:51,065 INFO L93 Difference]: Finished difference Result 58733 states and 220603 transitions. [2021-07-13 20:48:51,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-13 20:48:51,065 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 20:48:51,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:51,281 INFO L225 Difference]: With dead ends: 58733 [2021-07-13 20:48:51,281 INFO L226 Difference]: Without dead ends: 58709 [2021-07-13 20:48:51,282 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1248 ImplicationChecksByTransitivity, 791.5ms TimeCoverageRelationStatistics Valid=750, Invalid=3032, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 20:48:51,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58709 states. [2021-07-13 20:48:53,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58709 to 43997. [2021-07-13 20:48:53,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43997 states, 43996 states have (on average 3.8527820710973724) internal successors, (169507), 43996 states have internal predecessors, (169507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:53,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43997 states to 43997 states and 169507 transitions. [2021-07-13 20:48:53,259 INFO L78 Accepts]: Start accepts. Automaton has 43997 states and 169507 transitions. Word has length 28 [2021-07-13 20:48:53,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:53,259 INFO L482 AbstractCegarLoop]: Abstraction has 43997 states and 169507 transitions. [2021-07-13 20:48:53,259 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 20:48:53,259 INFO L276 IsEmpty]: Start isEmpty. Operand 43997 states and 169507 transitions. [2021-07-13 20:48:53,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:48:53,345 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:53,345 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 20:48:53,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3628,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:53,561 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:53,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:53,561 INFO L82 PathProgramCache]: Analyzing trace with hash -613280551, now seen corresponding path program 158 times [2021-07-13 20:48:53,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:53,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214911925] [2021-07-13 20:48:53,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:53,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:53,598 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 20:48:53,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:53,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214911925] [2021-07-13 20:48:53,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214911925] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:53,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679065131] [2021-07-13 20:48:53,598 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 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 20:48:53,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:48:53,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:53,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:48:53,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:53,687 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 20:48:53,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679065131] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:53,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:53,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-13 20:48:53,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842096389] [2021-07-13 20:48:53,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:48:53,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:53,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:48:53,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:48:53,687 INFO L87 Difference]: Start difference. First operand 43997 states and 169507 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 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 20:48:54,338 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2021-07-13 20:48:54,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:54,913 INFO L93 Difference]: Finished difference Result 58515 states and 219910 transitions. [2021-07-13 20:48:54,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-13 20:48:54,913 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 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 20:48:54,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:55,123 INFO L225 Difference]: With dead ends: 58515 [2021-07-13 20:48:55,123 INFO L226 Difference]: Without dead ends: 58475 [2021-07-13 20:48:55,123 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 646.0ms TimeCoverageRelationStatistics Valid=696, Invalid=2726, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 20:48:55,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58475 states. [2021-07-13 20:48:56,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58475 to 44346. [2021-07-13 20:48:56,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44346 states, 44345 states have (on average 3.854684857368362) internal successors, (170936), 44345 states have internal predecessors, (170936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:56,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44346 states to 44346 states and 170936 transitions. [2021-07-13 20:48:56,808 INFO L78 Accepts]: Start accepts. Automaton has 44346 states and 170936 transitions. Word has length 28 [2021-07-13 20:48:56,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:56,808 INFO L482 AbstractCegarLoop]: Abstraction has 44346 states and 170936 transitions. [2021-07-13 20:48:56,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 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 20:48:56,808 INFO L276 IsEmpty]: Start isEmpty. Operand 44346 states and 170936 transitions. [2021-07-13 20:48:56,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:48:56,903 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:56,903 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 20:48:57,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3629 [2021-07-13 20:48:57,120 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:57,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:57,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1767766801, now seen corresponding path program 159 times [2021-07-13 20:48:57,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:57,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410426117] [2021-07-13 20:48:57,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:57,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:57,157 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 20:48:57,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:57,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410426117] [2021-07-13 20:48:57,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410426117] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:57,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444203282] [2021-07-13 20:48:57,157 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 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 20:48:57,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:48:57,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:57,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:48:57,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:57,255 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 20:48:57,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444203282] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:57,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:57,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:48:57,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801017295] [2021-07-13 20:48:57,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:48:57,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:57,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:48:57,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:48:57,256 INFO L87 Difference]: Start difference. First operand 44346 states and 170936 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 20:48:57,623 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 16 [2021-07-13 20:48:58,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:58,857 INFO L93 Difference]: Finished difference Result 71060 states and 264453 transitions. [2021-07-13 20:48:58,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-13 20:48:58,857 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 20:48:58,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:59,115 INFO L225 Difference]: With dead ends: 71060 [2021-07-13 20:48:59,115 INFO L226 Difference]: Without dead ends: 71060 [2021-07-13 20:48:59,115 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 721.6ms TimeCoverageRelationStatistics Valid=901, Invalid=3131, Unknown=0, NotChecked=0, Total=4032 [2021-07-13 20:48:59,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71060 states. [2021-07-13 20:49:00,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71060 to 45512. [2021-07-13 20:49:00,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45512 states, 45511 states have (on average 3.869196457999165) internal successors, (176091), 45511 states have internal predecessors, (176091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:01,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45512 states to 45512 states and 176091 transitions. [2021-07-13 20:49:01,201 INFO L78 Accepts]: Start accepts. Automaton has 45512 states and 176091 transitions. Word has length 28 [2021-07-13 20:49:01,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:01,201 INFO L482 AbstractCegarLoop]: Abstraction has 45512 states and 176091 transitions. [2021-07-13 20:49:01,201 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 20:49:01,201 INFO L276 IsEmpty]: Start isEmpty. Operand 45512 states and 176091 transitions. [2021-07-13 20:49:01,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:49:01,314 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:01,315 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 20:49:01,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3630,240 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:01,530 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:01,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:01,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1155272981, now seen corresponding path program 160 times [2021-07-13 20:49:01,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:01,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332934014] [2021-07-13 20:49:01,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:01,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:01,594 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 20:49:01,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:01,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332934014] [2021-07-13 20:49:01,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332934014] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:01,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389505083] [2021-07-13 20:49:01,594 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 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 20:49:01,704 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:49:01,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:01,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:49:01,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:01,794 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 20:49:01,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389505083] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:01,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:01,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:49:01,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368241439] [2021-07-13 20:49:01,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:49:01,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:01,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:49:01,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:49:01,795 INFO L87 Difference]: Start difference. First operand 45512 states and 176091 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 20:49:03,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:03,161 INFO L93 Difference]: Finished difference Result 65145 states and 245703 transitions. [2021-07-13 20:49:03,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-13 20:49:03,161 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 20:49:03,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:03,409 INFO L225 Difference]: With dead ends: 65145 [2021-07-13 20:49:03,409 INFO L226 Difference]: Without dead ends: 65145 [2021-07-13 20:49:03,410 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1173 ImplicationChecksByTransitivity, 521.2ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 20:49:03,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65145 states. [2021-07-13 20:49:05,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65145 to 45542. [2021-07-13 20:49:05,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45542 states, 45541 states have (on average 3.868997167387629) internal successors, (176198), 45541 states have internal predecessors, (176198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:05,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45542 states to 45542 states and 176198 transitions. [2021-07-13 20:49:05,370 INFO L78 Accepts]: Start accepts. Automaton has 45542 states and 176198 transitions. Word has length 28 [2021-07-13 20:49:05,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:05,370 INFO L482 AbstractCegarLoop]: Abstraction has 45542 states and 176198 transitions. [2021-07-13 20:49:05,370 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 20:49:05,370 INFO L276 IsEmpty]: Start isEmpty. Operand 45542 states and 176198 transitions. [2021-07-13 20:49:05,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:49:05,459 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:05,459 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 20:49:05,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3631,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:05,676 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:05,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:05,676 INFO L82 PathProgramCache]: Analyzing trace with hash 2039891173, now seen corresponding path program 161 times [2021-07-13 20:49:05,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:05,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553570502] [2021-07-13 20:49:05,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:05,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:05,708 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 20:49:05,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:05,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553570502] [2021-07-13 20:49:05,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553570502] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:05,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428767144] [2021-07-13 20:49:05,708 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 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 20:49:05,729 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:49:05,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:05,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:49:05,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:05,811 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 20:49:05,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428767144] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:05,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:05,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 20:49:05,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577155340] [2021-07-13 20:49:05,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:49:05,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:05,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:49:05,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:49:05,825 INFO L87 Difference]: Start difference. First operand 45542 states and 176198 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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 20:49:07,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:07,882 INFO L93 Difference]: Finished difference Result 66003 states and 248139 transitions. [2021-07-13 20:49:07,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-07-13 20:49:07,882 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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 20:49:07,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:08,168 INFO L225 Difference]: With dead ends: 66003 [2021-07-13 20:49:08,168 INFO L226 Difference]: Without dead ends: 66003 [2021-07-13 20:49:08,169 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2900 ImplicationChecksByTransitivity, 1152.7ms TimeCoverageRelationStatistics Valid=1557, Invalid=5925, Unknown=0, NotChecked=0, Total=7482 [2021-07-13 20:49:08,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66003 states. [2021-07-13 20:49:09,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66003 to 45806. [2021-07-13 20:49:09,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45806 states, 45805 states have (on average 3.8654295382600155) internal successors, (177056), 45805 states have internal predecessors, (177056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:10,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45806 states to 45806 states and 177056 transitions. [2021-07-13 20:49:10,146 INFO L78 Accepts]: Start accepts. Automaton has 45806 states and 177056 transitions. Word has length 28 [2021-07-13 20:49:10,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:10,147 INFO L482 AbstractCegarLoop]: Abstraction has 45806 states and 177056 transitions. [2021-07-13 20:49:10,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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 20:49:10,147 INFO L276 IsEmpty]: Start isEmpty. Operand 45806 states and 177056 transitions. [2021-07-13 20:49:10,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:49:10,237 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:10,237 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 20:49:10,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3632,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:10,445 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:10,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:10,445 INFO L82 PathProgramCache]: Analyzing trace with hash 984513779, now seen corresponding path program 162 times [2021-07-13 20:49:10,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:10,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952448013] [2021-07-13 20:49:10,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:10,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:10,481 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 20:49:10,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:10,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952448013] [2021-07-13 20:49:10,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952448013] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:10,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734369438] [2021-07-13 20:49:10,481 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 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 20:49:10,506 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:49:10,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:10,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:49:10,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:10,609 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 20:49:10,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734369438] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:10,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:10,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 20:49:10,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529919486] [2021-07-13 20:49:10,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:49:10,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:10,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:49:10,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:49:10,610 INFO L87 Difference]: Start difference. First operand 45806 states and 177056 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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 20:49:12,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:12,159 INFO L93 Difference]: Finished difference Result 65215 states and 245904 transitions. [2021-07-13 20:49:12,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-13 20:49:12,160 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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 20:49:12,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:12,610 INFO L225 Difference]: With dead ends: 65215 [2021-07-13 20:49:12,610 INFO L226 Difference]: Without dead ends: 65211 [2021-07-13 20:49:12,611 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1770 ImplicationChecksByTransitivity, 706.6ms TimeCoverageRelationStatistics Valid=1139, Invalid=3831, Unknown=0, NotChecked=0, Total=4970 [2021-07-13 20:49:12,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65211 states. [2021-07-13 20:49:14,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65211 to 45442. [2021-07-13 20:49:14,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45442 states, 45441 states have (on average 3.869193019519817) internal successors, (175820), 45441 states have internal predecessors, (175820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:14,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45442 states to 45442 states and 175820 transitions. [2021-07-13 20:49:14,409 INFO L78 Accepts]: Start accepts. Automaton has 45442 states and 175820 transitions. Word has length 28 [2021-07-13 20:49:14,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:14,409 INFO L482 AbstractCegarLoop]: Abstraction has 45442 states and 175820 transitions. [2021-07-13 20:49:14,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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 20:49:14,409 INFO L276 IsEmpty]: Start isEmpty. Operand 45442 states and 175820 transitions. [2021-07-13 20:49:14,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:49:14,512 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:14,512 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 20:49:14,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3633 [2021-07-13 20:49:14,728 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:14,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:14,728 INFO L82 PathProgramCache]: Analyzing trace with hash 452743569, now seen corresponding path program 163 times [2021-07-13 20:49:14,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:14,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186957877] [2021-07-13 20:49:14,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:14,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:14,763 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 20:49:14,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:14,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186957877] [2021-07-13 20:49:14,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186957877] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:14,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065370242] [2021-07-13 20:49:14,764 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 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 20:49:14,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:14,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:49:14,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:15,191 WARN L205 SmtUtils]: Spent 387.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-07-13 20:49:15,260 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 20:49:15,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065370242] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:15,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:15,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:49:15,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296018805] [2021-07-13 20:49:15,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:49:15,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:15,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:49:15,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:49:15,261 INFO L87 Difference]: Start difference. First operand 45442 states and 175820 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 20:49:16,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:16,523 INFO L93 Difference]: Finished difference Result 59545 states and 226305 transitions. [2021-07-13 20:49:16,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 20:49:16,524 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 20:49:16,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:16,764 INFO L225 Difference]: With dead ends: 59545 [2021-07-13 20:49:16,764 INFO L226 Difference]: Without dead ends: 59545 [2021-07-13 20:49:16,764 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 921 ImplicationChecksByTransitivity, 845.1ms TimeCoverageRelationStatistics Valid=608, Invalid=2148, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 20:49:16,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59545 states. [2021-07-13 20:49:18,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59545 to 45458. [2021-07-13 20:49:18,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45458 states, 45457 states have (on average 3.8710869613040897) internal successors, (175968), 45457 states have internal predecessors, (175968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:18,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45458 states to 45458 states and 175968 transitions. [2021-07-13 20:49:18,379 INFO L78 Accepts]: Start accepts. Automaton has 45458 states and 175968 transitions. Word has length 28 [2021-07-13 20:49:18,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:18,379 INFO L482 AbstractCegarLoop]: Abstraction has 45458 states and 175968 transitions. [2021-07-13 20:49:18,380 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 20:49:18,380 INFO L276 IsEmpty]: Start isEmpty. Operand 45458 states and 175968 transitions. [2021-07-13 20:49:18,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:49:18,472 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:18,472 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 20:49:18,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3634,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:18,675 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:18,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:18,675 INFO L82 PathProgramCache]: Analyzing trace with hash 75176401, now seen corresponding path program 164 times [2021-07-13 20:49:18,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:18,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960731538] [2021-07-13 20:49:18,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:18,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:18,710 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 20:49:18,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:18,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960731538] [2021-07-13 20:49:18,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960731538] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:18,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876169428] [2021-07-13 20:49:18,710 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 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 20:49:18,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:49:18,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:18,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:49:18,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:19,214 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 20:49:19,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876169428] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:19,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:19,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:49:19,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083620011] [2021-07-13 20:49:19,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:49:19,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:19,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:49:19,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:49:19,215 INFO L87 Difference]: Start difference. First operand 45458 states and 175968 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 20:49:20,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:20,100 INFO L93 Difference]: Finished difference Result 58859 states and 224430 transitions. [2021-07-13 20:49:20,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:49:20,100 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 20:49:20,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:20,665 INFO L225 Difference]: With dead ends: 58859 [2021-07-13 20:49:20,666 INFO L226 Difference]: Without dead ends: 58847 [2021-07-13 20:49:20,666 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 759.5ms TimeCoverageRelationStatistics Valid=448, Invalid=1532, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:49:20,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58847 states. [2021-07-13 20:49:22,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58847 to 45392. [2021-07-13 20:49:22,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45392 states, 45391 states have (on average 3.8722433962679825) internal successors, (175765), 45391 states have internal predecessors, (175765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:22,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45392 states to 45392 states and 175765 transitions. [2021-07-13 20:49:22,289 INFO L78 Accepts]: Start accepts. Automaton has 45392 states and 175765 transitions. Word has length 28 [2021-07-13 20:49:22,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:22,289 INFO L482 AbstractCegarLoop]: Abstraction has 45392 states and 175765 transitions. [2021-07-13 20:49:22,289 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 20:49:22,289 INFO L276 IsEmpty]: Start isEmpty. Operand 45392 states and 175765 transitions. [2021-07-13 20:49:22,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:49:22,379 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:22,379 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 20:49:22,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3635 [2021-07-13 20:49:22,594 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:22,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:22,595 INFO L82 PathProgramCache]: Analyzing trace with hash -681682287, now seen corresponding path program 165 times [2021-07-13 20:49:22,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:22,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461395738] [2021-07-13 20:49:22,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:22,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:22,634 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 20:49:22,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:22,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461395738] [2021-07-13 20:49:22,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461395738] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:22,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369198739] [2021-07-13 20:49:22,634 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 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 20:49:22,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:49:22,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:22,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:49:22,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:22,757 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 20:49:22,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369198739] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:22,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:22,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:49:22,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48937071] [2021-07-13 20:49:22,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:49:22,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:22,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:49:22,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:49:22,758 INFO L87 Difference]: Start difference. First operand 45392 states and 175765 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 20:49:23,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:23,793 INFO L93 Difference]: Finished difference Result 49879 states and 190563 transitions. [2021-07-13 20:49:23,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:49:23,793 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 20:49:23,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:23,973 INFO L225 Difference]: With dead ends: 49879 [2021-07-13 20:49:23,973 INFO L226 Difference]: Without dead ends: 49879 [2021-07-13 20:49:23,973 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 639.7ms TimeCoverageRelationStatistics Valid=323, Invalid=1159, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:49:24,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49879 states. [2021-07-13 20:49:25,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49879 to 45600. [2021-07-13 20:49:25,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45600 states, 45599 states have (on average 3.8697559156999057) internal successors, (176457), 45599 states have internal predecessors, (176457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:25,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45600 states to 45600 states and 176457 transitions. [2021-07-13 20:49:25,710 INFO L78 Accepts]: Start accepts. Automaton has 45600 states and 176457 transitions. Word has length 28 [2021-07-13 20:49:25,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:25,710 INFO L482 AbstractCegarLoop]: Abstraction has 45600 states and 176457 transitions. [2021-07-13 20:49:25,710 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 20:49:25,710 INFO L276 IsEmpty]: Start isEmpty. Operand 45600 states and 176457 transitions. [2021-07-13 20:49:25,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:49:25,800 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:25,800 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 20:49:26,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3636,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:26,016 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:26,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:26,016 INFO L82 PathProgramCache]: Analyzing trace with hash -852441489, now seen corresponding path program 166 times [2021-07-13 20:49:26,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:26,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219728056] [2021-07-13 20:49:26,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:26,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:26,048 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 20:49:26,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:26,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219728056] [2021-07-13 20:49:26,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219728056] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:26,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786035869] [2021-07-13 20:49:26,048 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 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 20:49:26,072 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:49:26,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:26,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:49:26,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:26,157 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 20:49:26,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786035869] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:26,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:26,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 20:49:26,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417743034] [2021-07-13 20:49:26,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:49:26,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:26,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:49:26,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:49:26,158 INFO L87 Difference]: Start difference. First operand 45600 states and 176457 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 20:49:27,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:27,005 INFO L93 Difference]: Finished difference Result 49726 states and 190165 transitions. [2021-07-13 20:49:27,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:49:27,005 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 20:49:27,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:27,197 INFO L225 Difference]: With dead ends: 49726 [2021-07-13 20:49:27,197 INFO L226 Difference]: Without dead ends: 49722 [2021-07-13 20:49:27,197 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 227.7ms TimeCoverageRelationStatistics Valid=247, Invalid=809, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:49:27,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49722 states. [2021-07-13 20:49:28,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49722 to 45540. [2021-07-13 20:49:28,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45540 states, 45539 states have (on average 3.8706383539383826) internal successors, (176265), 45539 states have internal predecessors, (176265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:28,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45540 states to 45540 states and 176265 transitions. [2021-07-13 20:49:28,842 INFO L78 Accepts]: Start accepts. Automaton has 45540 states and 176265 transitions. Word has length 28 [2021-07-13 20:49:28,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:28,842 INFO L482 AbstractCegarLoop]: Abstraction has 45540 states and 176265 transitions. [2021-07-13 20:49:28,842 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 20:49:28,842 INFO L276 IsEmpty]: Start isEmpty. Operand 45540 states and 176265 transitions. [2021-07-13 20:49:28,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:49:28,945 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:28,945 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 20:49:29,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3637 [2021-07-13 20:49:29,147 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:29,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:29,147 INFO L82 PathProgramCache]: Analyzing trace with hash -492872947, now seen corresponding path program 81 times [2021-07-13 20:49:29,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:29,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833524687] [2021-07-13 20:49:29,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:29,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:29,183 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 20:49:29,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:29,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833524687] [2021-07-13 20:49:29,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833524687] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:29,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248082764] [2021-07-13 20:49:29,183 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 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 20:49:29,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:49:29,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:29,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:49:29,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:29,250 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 20:49:29,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248082764] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:29,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:29,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-07-13 20:49:29,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035287380] [2021-07-13 20:49:29,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:49:29,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:29,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:49:29,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:49:29,251 INFO L87 Difference]: Start difference. First operand 45540 states and 176265 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 20:49:30,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:30,028 INFO L93 Difference]: Finished difference Result 49767 states and 190248 transitions. [2021-07-13 20:49:30,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:49:30,029 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 20:49:30,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:30,210 INFO L225 Difference]: With dead ends: 49767 [2021-07-13 20:49:30,210 INFO L226 Difference]: Without dead ends: 49767 [2021-07-13 20:49:30,210 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 206.5ms TimeCoverageRelationStatistics Valid=275, Invalid=781, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:49:30,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49767 states. [2021-07-13 20:49:31,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49767 to 45644. [2021-07-13 20:49:31,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45644 states, 45643 states have (on average 3.8689174681769383) internal successors, (176589), 45643 states have internal predecessors, (176589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:31,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45644 states to 45644 states and 176589 transitions. [2021-07-13 20:49:31,814 INFO L78 Accepts]: Start accepts. Automaton has 45644 states and 176589 transitions. Word has length 28 [2021-07-13 20:49:31,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:31,814 INFO L482 AbstractCegarLoop]: Abstraction has 45644 states and 176589 transitions. [2021-07-13 20:49:31,814 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 20:49:31,814 INFO L276 IsEmpty]: Start isEmpty. Operand 45644 states and 176589 transitions. [2021-07-13 20:49:32,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:49:32,268 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:32,268 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 20:49:32,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3638,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:32,484 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:32,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:32,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1753160091, now seen corresponding path program 82 times [2021-07-13 20:49:32,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:32,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375702156] [2021-07-13 20:49:32,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:32,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:32,521 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 20:49:32,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:32,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375702156] [2021-07-13 20:49:32,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375702156] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:32,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629651885] [2021-07-13 20:49:32,521 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 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 20:49:32,544 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:49:32,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:32,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:49:32,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:32,637 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 20:49:32,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629651885] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:32,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:32,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 20:49:32,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120018990] [2021-07-13 20:49:32,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:49:32,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:32,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:49:32,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:49:32,638 INFO L87 Difference]: Start difference. First operand 45644 states and 176589 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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 20:49:33,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:33,642 INFO L93 Difference]: Finished difference Result 56748 states and 216058 transitions. [2021-07-13 20:49:33,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:49:33,643 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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 20:49:33,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:33,871 INFO L225 Difference]: With dead ends: 56748 [2021-07-13 20:49:33,871 INFO L226 Difference]: Without dead ends: 56658 [2021-07-13 20:49:33,871 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 259.0ms TimeCoverageRelationStatistics Valid=306, Invalid=954, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:49:33,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56658 states. [2021-07-13 20:49:35,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56658 to 45467. [2021-07-13 20:49:35,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45467 states, 45466 states have (on average 3.8675713720142526) internal successors, (175843), 45466 states have internal predecessors, (175843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:35,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45467 states to 45467 states and 175843 transitions. [2021-07-13 20:49:35,477 INFO L78 Accepts]: Start accepts. Automaton has 45467 states and 175843 transitions. Word has length 28 [2021-07-13 20:49:35,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:35,477 INFO L482 AbstractCegarLoop]: Abstraction has 45467 states and 175843 transitions. [2021-07-13 20:49:35,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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 20:49:35,477 INFO L276 IsEmpty]: Start isEmpty. Operand 45467 states and 175843 transitions. [2021-07-13 20:49:35,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:49:35,573 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:35,574 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 20:49:35,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3639 [2021-07-13 20:49:35,789 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:35,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:35,790 INFO L82 PathProgramCache]: Analyzing trace with hash -115621907, now seen corresponding path program 83 times [2021-07-13 20:49:35,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:35,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220410615] [2021-07-13 20:49:35,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:35,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:35,839 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 20:49:35,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:35,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220410615] [2021-07-13 20:49:35,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220410615] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:35,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741133036] [2021-07-13 20:49:35,839 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 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 20:49:35,863 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:49:35,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:35,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:49:35,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:35,907 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 20:49:35,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741133036] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:35,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:35,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 20:49:35,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709984784] [2021-07-13 20:49:35,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:49:35,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:35,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:49:35,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:49:35,908 INFO L87 Difference]: Start difference. First operand 45467 states and 175843 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 20:49:36,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:36,800 INFO L93 Difference]: Finished difference Result 49946 states and 190806 transitions. [2021-07-13 20:49:36,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:49:36,801 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 20:49:36,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:36,977 INFO L225 Difference]: With dead ends: 49946 [2021-07-13 20:49:36,977 INFO L226 Difference]: Without dead ends: 49934 [2021-07-13 20:49:36,978 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 139.6ms TimeCoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:49:37,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49934 states. [2021-07-13 20:49:38,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49934 to 45605. [2021-07-13 20:49:38,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45605 states, 45604 states have (on average 3.865713533900535) internal successors, (176292), 45604 states have internal predecessors, (176292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:38,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45605 states to 45605 states and 176292 transitions. [2021-07-13 20:49:38,429 INFO L78 Accepts]: Start accepts. Automaton has 45605 states and 176292 transitions. Word has length 28 [2021-07-13 20:49:38,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:38,429 INFO L482 AbstractCegarLoop]: Abstraction has 45605 states and 176292 transitions. [2021-07-13 20:49:38,429 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 20:49:38,429 INFO L276 IsEmpty]: Start isEmpty. Operand 45605 states and 176292 transitions. [2021-07-13 20:49:38,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:49:38,517 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:38,517 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 20:49:38,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3640,250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:38,732 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:38,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:38,732 INFO L82 PathProgramCache]: Analyzing trace with hash -903981331, now seen corresponding path program 84 times [2021-07-13 20:49:38,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:38,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056795487] [2021-07-13 20:49:38,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:38,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:38,964 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 20:49:38,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:38,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056795487] [2021-07-13 20:49:38,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056795487] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:38,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918842192] [2021-07-13 20:49:38,964 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) [2021-07-13 20:49:39,025 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:49:39,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:39,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:49:39,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:39,069 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 20:49:39,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918842192] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:39,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:39,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-07-13 20:49:39,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798979819] [2021-07-13 20:49:39,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:49:39,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:39,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:49:39,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:49:39,070 INFO L87 Difference]: Start difference. First operand 45605 states and 176292 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 20:49:39,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:39,600 INFO L93 Difference]: Finished difference Result 49910 states and 190722 transitions. [2021-07-13 20:49:39,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:49:39,600 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 20:49:39,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:39,783 INFO L225 Difference]: With dead ends: 49910 [2021-07-13 20:49:39,783 INFO L226 Difference]: Without dead ends: 49890 [2021-07-13 20:49:39,783 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 346.9ms TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:49:40,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49890 states. [2021-07-13 20:49:41,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49890 to 45605. [2021-07-13 20:49:41,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45605 states, 45604 states have (on average 3.86562582229629) internal successors, (176288), 45604 states have internal predecessors, (176288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:41,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45605 states to 45605 states and 176288 transitions. [2021-07-13 20:49:41,614 INFO L78 Accepts]: Start accepts. Automaton has 45605 states and 176288 transitions. Word has length 28 [2021-07-13 20:49:41,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:41,614 INFO L482 AbstractCegarLoop]: Abstraction has 45605 states and 176288 transitions. [2021-07-13 20:49:41,614 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 20:49:41,614 INFO L276 IsEmpty]: Start isEmpty. Operand 45605 states and 176288 transitions. [2021-07-13 20:49:41,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:49:41,699 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:41,699 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 20:49:41,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3641,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:41,915 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:41,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:41,915 INFO L82 PathProgramCache]: Analyzing trace with hash 987543313, now seen corresponding path program 167 times [2021-07-13 20:49:41,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:41,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782443792] [2021-07-13 20:49:41,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:41,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:41,947 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 20:49:41,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:41,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782443792] [2021-07-13 20:49:41,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782443792] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:41,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528731925] [2021-07-13 20:49:41,947 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:41,972 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:49:41,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:41,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:49:41,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:42,032 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 20:49:42,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528731925] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:42,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:42,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:49:42,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851229022] [2021-07-13 20:49:42,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:49:42,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:42,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:49:42,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:49:42,033 INFO L87 Difference]: Start difference. First operand 45605 states and 176288 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 20:49:42,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:42,860 INFO L93 Difference]: Finished difference Result 50572 states and 193874 transitions. [2021-07-13 20:49:42,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:49:42,860 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 20:49:42,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:43,047 INFO L225 Difference]: With dead ends: 50572 [2021-07-13 20:49:43,047 INFO L226 Difference]: Without dead ends: 50559 [2021-07-13 20:49:43,047 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 128.1ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:49:43,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50559 states. [2021-07-13 20:49:44,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50559 to 48338. [2021-07-13 20:49:44,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48338 states, 48337 states have (on average 3.8743819434387734) internal successors, (187276), 48337 states have internal predecessors, (187276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:44,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48338 states to 48338 states and 187276 transitions. [2021-07-13 20:49:44,615 INFO L78 Accepts]: Start accepts. Automaton has 48338 states and 187276 transitions. Word has length 28 [2021-07-13 20:49:44,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:44,615 INFO L482 AbstractCegarLoop]: Abstraction has 48338 states and 187276 transitions. [2021-07-13 20:49:44,616 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 20:49:44,616 INFO L276 IsEmpty]: Start isEmpty. Operand 48338 states and 187276 transitions. [2021-07-13 20:49:44,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:49:44,706 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:44,706 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 20:49:44,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3642 [2021-07-13 20:49:44,918 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:44,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:44,918 INFO L82 PathProgramCache]: Analyzing trace with hash 304798983, now seen corresponding path program 168 times [2021-07-13 20:49:44,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:44,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968560311] [2021-07-13 20:49:44,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:44,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:44,948 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 20:49:44,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:44,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968560311] [2021-07-13 20:49:44,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968560311] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:44,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933612651] [2021-07-13 20:49:44,948 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:44,974 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:49:44,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:44,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:49:44,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:45,024 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 20:49:45,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933612651] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:45,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:45,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:49:45,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450406407] [2021-07-13 20:49:45,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:49:45,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:45,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:49:45,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:49:45,026 INFO L87 Difference]: Start difference. First operand 48338 states and 187276 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 20:49:45,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:45,926 INFO L93 Difference]: Finished difference Result 53920 states and 205320 transitions. [2021-07-13 20:49:45,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:49:45,927 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 20:49:45,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:46,186 INFO L225 Difference]: With dead ends: 53920 [2021-07-13 20:49:46,187 INFO L226 Difference]: Without dead ends: 53920 [2021-07-13 20:49:46,187 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 333.6ms TimeCoverageRelationStatistics Valid=202, Invalid=500, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:49:46,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53920 states. [2021-07-13 20:49:47,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53920 to 42878. [2021-07-13 20:49:47,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42878 states, 42877 states have (on average 3.8613708981505237) internal successors, (165564), 42877 states have internal predecessors, (165564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:47,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42878 states to 42878 states and 165564 transitions. [2021-07-13 20:49:47,658 INFO L78 Accepts]: Start accepts. Automaton has 42878 states and 165564 transitions. Word has length 28 [2021-07-13 20:49:47,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:47,658 INFO L482 AbstractCegarLoop]: Abstraction has 42878 states and 165564 transitions. [2021-07-13 20:49:47,658 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 20:49:47,658 INFO L276 IsEmpty]: Start isEmpty. Operand 42878 states and 165564 transitions. [2021-07-13 20:49:47,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:49:47,745 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:47,745 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 20:49:47,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3643,253 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:47,961 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:47,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:47,962 INFO L82 PathProgramCache]: Analyzing trace with hash -15319481, now seen corresponding path program 169 times [2021-07-13 20:49:47,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:47,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112581629] [2021-07-13 20:49:47,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:47,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:48,012 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 20:49:48,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:48,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112581629] [2021-07-13 20:49:48,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112581629] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:48,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515757343] [2021-07-13 20:49:48,012 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:48,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:48,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:49:48,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:48,102 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 20:49:48,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515757343] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:48,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:48,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:49:48,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885735703] [2021-07-13 20:49:48,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:49:48,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:48,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:49:48,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:49:48,103 INFO L87 Difference]: Start difference. First operand 42878 states and 165564 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 20:49:48,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:48,835 INFO L93 Difference]: Finished difference Result 47758 states and 181995 transitions. [2021-07-13 20:49:48,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:49:48,836 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 20:49:48,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:48,982 INFO L225 Difference]: With dead ends: 47758 [2021-07-13 20:49:48,982 INFO L226 Difference]: Without dead ends: 47758 [2021-07-13 20:49:48,983 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 212.3ms TimeCoverageRelationStatistics Valid=270, Invalid=722, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:49:49,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47758 states. [2021-07-13 20:49:50,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47758 to 43711. [2021-07-13 20:49:50,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43711 states, 43710 states have (on average 3.8600320292839165) internal successors, (168722), 43710 states have internal predecessors, (168722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:50,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43711 states to 43711 states and 168722 transitions. [2021-07-13 20:49:50,298 INFO L78 Accepts]: Start accepts. Automaton has 43711 states and 168722 transitions. Word has length 28 [2021-07-13 20:49:50,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:50,298 INFO L482 AbstractCegarLoop]: Abstraction has 43711 states and 168722 transitions. [2021-07-13 20:49:50,298 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 20:49:50,298 INFO L276 IsEmpty]: Start isEmpty. Operand 43711 states and 168722 transitions. [2021-07-13 20:49:50,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:49:50,386 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:50,386 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 20:49:50,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3644,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:50,602 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:50,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:50,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1024489657, now seen corresponding path program 170 times [2021-07-13 20:49:50,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:50,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706725149] [2021-07-13 20:49:50,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:50,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:50,638 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 20:49:50,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:50,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706725149] [2021-07-13 20:49:50,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706725149] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:50,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932764959] [2021-07-13 20:49:50,638 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 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 20:49:50,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:49:50,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:50,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:49:50,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:50,729 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 20:49:50,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932764959] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:50,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:50,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-07-13 20:49:50,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239987178] [2021-07-13 20:49:50,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:49:50,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:50,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:49:50,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:49:50,729 INFO L87 Difference]: Start difference. First operand 43711 states and 168722 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 20:49:51,202 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2021-07-13 20:49:51,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:51,562 INFO L93 Difference]: Finished difference Result 45468 states and 174583 transitions. [2021-07-13 20:49:51,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:49:51,567 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 20:49:51,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:51,725 INFO L225 Difference]: With dead ends: 45468 [2021-07-13 20:49:51,725 INFO L226 Difference]: Without dead ends: 45468 [2021-07-13 20:49:51,727 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 479.7ms TimeCoverageRelationStatistics Valid=160, Invalid=392, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:49:51,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45468 states. [2021-07-13 20:49:52,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45468 to 43719. [2021-07-13 20:49:53,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43719 states, 43718 states have (on average 3.85987465117343) internal successors, (168746), 43718 states have internal predecessors, (168746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:53,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43719 states to 43719 states and 168746 transitions. [2021-07-13 20:49:53,185 INFO L78 Accepts]: Start accepts. Automaton has 43719 states and 168746 transitions. Word has length 28 [2021-07-13 20:49:53,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:53,185 INFO L482 AbstractCegarLoop]: Abstraction has 43719 states and 168746 transitions. [2021-07-13 20:49:53,185 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 20:49:53,185 INFO L276 IsEmpty]: Start isEmpty. Operand 43719 states and 168746 transitions. [2021-07-13 20:49:53,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:49:53,270 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:53,270 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 20:49:53,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3645,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:53,486 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:53,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:53,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1121758121, now seen corresponding path program 171 times [2021-07-13 20:49:53,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:53,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796169196] [2021-07-13 20:49:53,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:53,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:53,529 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 20:49:53,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:53,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796169196] [2021-07-13 20:49:53,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796169196] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:53,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722330822] [2021-07-13 20:49:53,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:53,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:49:53,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:53,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:49:53,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:53,626 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 20:49:53,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722330822] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:53,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:53,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 20:49:53,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317235874] [2021-07-13 20:49:53,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:49:53,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:53,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:49:53,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:49:53,628 INFO L87 Difference]: Start difference. First operand 43719 states and 168746 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 20:49:54,057 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2021-07-13 20:49:54,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:54,404 INFO L93 Difference]: Finished difference Result 45188 states and 173661 transitions. [2021-07-13 20:49:54,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:49:54,405 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 20:49:54,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:54,563 INFO L225 Difference]: With dead ends: 45188 [2021-07-13 20:49:54,563 INFO L226 Difference]: Without dead ends: 45188 [2021-07-13 20:49:54,563 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 440.6ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:49:54,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45188 states. [2021-07-13 20:49:55,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45188 to 43613. [2021-07-13 20:49:55,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43613 states, 43612 states have (on average 3.859534073190865) internal successors, (168322), 43612 states have internal predecessors, (168322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:56,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43613 states to 43613 states and 168322 transitions. [2021-07-13 20:49:56,005 INFO L78 Accepts]: Start accepts. Automaton has 43613 states and 168322 transitions. Word has length 28 [2021-07-13 20:49:56,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:56,006 INFO L482 AbstractCegarLoop]: Abstraction has 43613 states and 168322 transitions. [2021-07-13 20:49:56,006 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 20:49:56,006 INFO L276 IsEmpty]: Start isEmpty. Operand 43613 states and 168322 transitions. [2021-07-13 20:49:56,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:49:56,091 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:56,091 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 20:49:56,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3646,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:56,305 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:56,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:56,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1358211129, now seen corresponding path program 172 times [2021-07-13 20:49:56,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:56,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862831117] [2021-07-13 20:49:56,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:56,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:56,646 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 97 [2021-07-13 20:49:56,821 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 73 [2021-07-13 20:49:56,965 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 71 [2021-07-13 20:49:57,100 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 66 [2021-07-13 20:49:57,347 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 20:49:57,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:57,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862831117] [2021-07-13 20:49:57,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862831117] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:57,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106731942] [2021-07-13 20:49:57,348 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:57,376 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:49:57,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:57,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-13 20:49:57,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:57,737 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-07-13 20:49:57,907 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 99 [2021-07-13 20:49:58,091 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-07-13 20:49:58,579 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 103 [2021-07-13 20:49:58,792 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-07-13 20:49:58,993 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-07-13 20:49:59,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:49:59,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:49:59,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:49:59,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:49:59,252 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 49 treesize of output 29 [2021-07-13 20:49:59,253 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:49:59,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:49:59,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:49:59,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:49:59,263 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 44 treesize of output 26 [2021-07-13 20:49:59,264 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:49:59,761 WARN L205 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 147 [2021-07-13 20:49:59,761 INFO L628 ElimStorePlain]: treesize reduction 364, result has 54.9 percent of original size [2021-07-13 20:49:59,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:49:59,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:49:59,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:49:59,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:49:59,774 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 49 treesize of output 27 [2021-07-13 20:49:59,775 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:49:59,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:49:59,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:49:59,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:49:59,784 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 29 [2021-07-13 20:49:59,785 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:49:59,949 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2021-07-13 20:49:59,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:49:59,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:49:59,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:49:59,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:49:59,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 21 [2021-07-13 20:49:59,960 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:50:00,114 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2021-07-13 20:50:00,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:50:00,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:00,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:00,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:50:00,122 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-07-13 20:50:00,123 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:50:00,264 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-07-13 20:50:00,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:50:00,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:50:00,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:00,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:00,272 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 31 treesize of output 19 [2021-07-13 20:50:00,273 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:50:00,410 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-07-13 20:50:00,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:50:00,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:00,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:00,418 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 25 treesize of output 15 [2021-07-13 20:50:00,419 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:50:00,550 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-07-13 20:50:00,550 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:50:00,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:00,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:00,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:50:00,558 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:50:00,679 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-07-13 20:50:00,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:50:00,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:00,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:00,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:50:00,685 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 41 treesize of output 23 [2021-07-13 20:50:00,686 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:50:00,788 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-07-13 20:50:00,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:50:00,793 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-07-13 20:50:00,793 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 24 variables, input treesize:867, output treesize:87 [2021-07-13 20:50:00,866 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 20:50:00,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106731942] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:00,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:50:00,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-13 20:50:00,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753648893] [2021-07-13 20:50:00,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:50:00,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:50:00,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:50:00,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:50:00,867 INFO L87 Difference]: Start difference. First operand 43613 states and 168322 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 20:50:01,054 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 55 [2021-07-13 20:50:01,272 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 77 [2021-07-13 20:50:01,751 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 117 [2021-07-13 20:50:02,033 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 86 [2021-07-13 20:50:02,479 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 81 [2021-07-13 20:50:03,136 WARN L205 SmtUtils]: Spent 558.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 135 [2021-07-13 20:50:03,851 WARN L205 SmtUtils]: Spent 630.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 127 [2021-07-13 20:50:05,030 WARN L205 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 163 DAG size of output: 146 [2021-07-13 20:50:05,247 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2021-07-13 20:50:05,470 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-07-13 20:50:05,912 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 108 [2021-07-13 20:50:06,382 WARN L205 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 131 [2021-07-13 20:50:06,824 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 128 [2021-07-13 20:50:07,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:50:07,380 INFO L93 Difference]: Finished difference Result 46436 states and 176472 transitions. [2021-07-13 20:50:07,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:50:07,380 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 20:50:07,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:50:07,536 INFO L225 Difference]: With dead ends: 46436 [2021-07-13 20:50:07,536 INFO L226 Difference]: Without dead ends: 46376 [2021-07-13 20:50:07,536 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 7316.7ms TimeCoverageRelationStatistics Valid=297, Invalid=1595, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:50:07,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46376 states. [2021-07-13 20:50:08,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46376 to 43670. [2021-07-13 20:50:08,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43670 states, 43669 states have (on average 3.858686940392498) internal successors, (168505), 43669 states have internal predecessors, (168505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:08,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43670 states to 43670 states and 168505 transitions. [2021-07-13 20:50:08,989 INFO L78 Accepts]: Start accepts. Automaton has 43670 states and 168505 transitions. Word has length 30 [2021-07-13 20:50:08,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:50:08,989 INFO L482 AbstractCegarLoop]: Abstraction has 43670 states and 168505 transitions. [2021-07-13 20:50:08,989 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 20:50:08,990 INFO L276 IsEmpty]: Start isEmpty. Operand 43670 states and 168505 transitions. [2021-07-13 20:50:09,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:50:09,084 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:50:09,084 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 20:50:09,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3647 [2021-07-13 20:50:09,301 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:50:09,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:50:09,302 INFO L82 PathProgramCache]: Analyzing trace with hash 908358151, now seen corresponding path program 173 times [2021-07-13 20:50:09,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:50:09,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726843945] [2021-07-13 20:50:09,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:50:09,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:50:09,641 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 67 [2021-07-13 20:50:09,845 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 68 [2021-07-13 20:50:10,022 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 60 [2021-07-13 20:50:10,178 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 64 [2021-07-13 20:50:10,441 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 20:50:10,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:50:10,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726843945] [2021-07-13 20:50:10,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726843945] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:10,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009140707] [2021-07-13 20:50:10,441 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 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 20:50:10,473 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:50:10,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:50:10,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-13 20:50:10,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:50:10,855 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-07-13 20:50:11,095 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-07-13 20:50:11,483 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-07-13 20:50:11,726 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-07-13 20:50:12,763 WARN L205 SmtUtils]: Spent 748.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 124 [2021-07-13 20:50:12,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:50:12,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:12,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:12,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:50:12,937 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 58 treesize of output 32 [2021-07-13 20:50:12,938 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:50:12,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:50:12,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:12,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:12,948 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 27 [2021-07-13 20:50:12,949 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:50:13,410 WARN L205 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 154 [2021-07-13 20:50:13,410 INFO L628 ElimStorePlain]: treesize reduction 149, result has 75.5 percent of original size [2021-07-13 20:50:13,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:13,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:13,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:13,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:50:13,421 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 24 [2021-07-13 20:50:13,422 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:50:13,628 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2021-07-13 20:50:13,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:50:13,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:13,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:50:13,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:13,638 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 31 treesize of output 19 [2021-07-13 20:50:13,639 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:50:13,831 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2021-07-13 20:50:13,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:50:13,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:13,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:50:13,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:13,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:50:13,845 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 30 treesize of output 18 [2021-07-13 20:50:13,846 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:50:13,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:13,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:13,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:50:13,857 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:50:14,177 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 124 [2021-07-13 20:50:14,177 INFO L628 ElimStorePlain]: treesize reduction 22, result has 94.1 percent of original size [2021-07-13 20:50:14,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:50:14,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:14,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:14,185 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 51 treesize of output 29 [2021-07-13 20:50:14,186 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:50:14,333 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-07-13 20:50:14,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:50:14,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:14,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:14,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-07-13 20:50:14,345 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:50:14,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:50:14,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:14,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:14,353 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 41 treesize of output 23 [2021-07-13 20:50:14,354 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:50:14,641 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 96 [2021-07-13 20:50:14,642 INFO L628 ElimStorePlain]: treesize reduction 22, result has 91.7 percent of original size [2021-07-13 20:50:14,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:14,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:14,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:50:14,649 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 39 treesize of output 23 [2021-07-13 20:50:14,650 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:50:14,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:50:14,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:50:14,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:14,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:14,756 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 21 [2021-07-13 20:50:14,757 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:50:14,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:50:14,853 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-07-13 20:50:14,853 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 24 variables, input treesize:689, output treesize:93 [2021-07-13 20:50:14,940 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 20:50:14,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009140707] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:14,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:50:14,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-13 20:50:14,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745961030] [2021-07-13 20:50:14,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:50:14,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:50:14,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:50:14,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:50:14,941 INFO L87 Difference]: Start difference. First operand 43670 states and 168505 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 20:50:15,128 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 56 [2021-07-13 20:50:15,344 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 71 [2021-07-13 20:50:15,672 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 84 [2021-07-13 20:50:16,551 WARN L205 SmtUtils]: Spent 679.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 138 [2021-07-13 20:50:17,233 WARN L205 SmtUtils]: Spent 610.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 120 [2021-07-13 20:50:18,336 WARN L205 SmtUtils]: Spent 986.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 142 [2021-07-13 20:50:18,658 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-07-13 20:50:19,107 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 107 [2021-07-13 20:50:19,569 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-13 20:50:19,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:50:19,938 INFO L93 Difference]: Finished difference Result 43954 states and 169226 transitions. [2021-07-13 20:50:19,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:50:19,939 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 20:50:19,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:50:20,087 INFO L225 Difference]: With dead ends: 43954 [2021-07-13 20:50:20,087 INFO L226 Difference]: Without dead ends: 43924 [2021-07-13 20:50:20,088 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 6592.7ms TimeCoverageRelationStatistics Valid=194, Invalid=1066, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:50:20,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43924 states. [2021-07-13 20:50:21,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43924 to 43662. [2021-07-13 20:50:21,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43662 states, 43661 states have (on average 3.8589129887084583) internal successors, (168484), 43661 states have internal predecessors, (168484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:21,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43662 states to 43662 states and 168484 transitions. [2021-07-13 20:50:21,469 INFO L78 Accepts]: Start accepts. Automaton has 43662 states and 168484 transitions. Word has length 30 [2021-07-13 20:50:21,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:50:21,470 INFO L482 AbstractCegarLoop]: Abstraction has 43662 states and 168484 transitions. [2021-07-13 20:50:21,470 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 20:50:21,470 INFO L276 IsEmpty]: Start isEmpty. Operand 43662 states and 168484 transitions. [2021-07-13 20:50:21,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:50:21,560 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:50:21,560 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 20:50:21,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3688,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:50:21,776 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:50:21,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:50:21,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1795179837, now seen corresponding path program 174 times [2021-07-13 20:50:21,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:50:21,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667600950] [2021-07-13 20:50:21,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:50:21,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:50:22,580 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 87 [2021-07-13 20:50:22,733 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 54 [2021-07-13 20:50:22,873 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 46 [2021-07-13 20:50:23,089 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 20:50:23,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:50:23,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667600950] [2021-07-13 20:50:23,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667600950] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:23,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35796310] [2021-07-13 20:50:23,090 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:50:23,123 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:50:23,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:50:23,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-13 20:50:23,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:50:23,866 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-07-13 20:50:24,245 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2021-07-13 20:50:24,739 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2021-07-13 20:50:25,386 WARN L205 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 147 [2021-07-13 20:50:27,878 WARN L205 SmtUtils]: Spent 1.94 s on a formula simplification that was a NOOP. DAG size: 175 [2021-07-13 20:50:29,677 WARN L205 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 477 DAG size of output: 310 [2021-07-13 20:50:29,951 INFO L446 ElimStorePlain]: Different costs {10=[v_prenex_605, v_prenex_591, v_prenex_595, v_prenex_601], 15=[A, v_prenex_603, v_prenex_608, v_prenex_593, v_prenex_597, v_prenex_599]} [2021-07-13 20:50:29,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:29,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:30,007 INFO L354 Elim1Store]: treesize reduction 64, result has 1.5 percent of original size [2021-07-13 20:50:30,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 60 treesize of output 1 [2021-07-13 20:50:30,008 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:50:30,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:30,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:30,058 INFO L354 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2021-07-13 20:50:30,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 60 treesize of output 45 [2021-07-13 20:50:30,060 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:50:31,370 WARN L205 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 362 DAG size of output: 333 [2021-07-13 20:50:31,371 INFO L628 ElimStorePlain]: treesize reduction 1119, result has 53.3 percent of original size [2021-07-13 20:50:31,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:31,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:31,417 INFO L354 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2021-07-13 20:50:31,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 69 treesize of output 50 [2021-07-13 20:50:31,420 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:50:31,847 WARN L205 SmtUtils]: Spent 426.00 ms on a formula simplification that was a NOOP. DAG size: 317 [2021-07-13 20:50:31,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:50:31,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:31,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:31,891 INFO L354 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2021-07-13 20:50:31,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 66 treesize of output 49 [2021-07-13 20:50:31,893 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:50:32,312 WARN L205 SmtUtils]: Spent 418.00 ms on a formula simplification that was a NOOP. DAG size: 302 [2021-07-13 20:50:32,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:50:32,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:32,345 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-07-13 20:50:32,345 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 5 new quantified variables, introduced 5 case distinctions, treesize of input 56 treesize of output 40 [2021-07-13 20:50:32,347 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:50:32,730 WARN L205 SmtUtils]: Spent 383.00 ms on a formula simplification that was a NOOP. DAG size: 288 [2021-07-13 20:50:32,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:50:32,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:32,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:32,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:32,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:32,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:32,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:32,786 INFO L354 Elim1Store]: treesize reduction 63, result has 13.7 percent of original size [2021-07-13 20:50:32,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 9 case distinctions, treesize of input 98 treesize of output 61 [2021-07-13 20:50:32,788 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:50:33,159 WARN L205 SmtUtils]: Spent 370.00 ms on a formula simplification that was a NOOP. DAG size: 270 [2021-07-13 20:50:33,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:50:33,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:33,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:33,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:33,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:33,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:33,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:33,240 INFO L354 Elim1Store]: treesize reduction 63, result has 13.7 percent of original size [2021-07-13 20:50:33,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 9 case distinctions, treesize of input 109 treesize of output 68 [2021-07-13 20:50:33,242 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:50:33,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:33,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:33,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:33,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:33,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:33,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:33,274 INFO L354 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2021-07-13 20:50:33,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 9 case distinctions, treesize of input 107 treesize of output 1 [2021-07-13 20:50:33,274 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:50:33,566 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 245 [2021-07-13 20:50:33,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:50:33,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:33,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:33,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:33,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:33,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:33,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:33,615 INFO L354 Elim1Store]: treesize reduction 63, result has 13.7 percent of original size [2021-07-13 20:50:33,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 9 case distinctions, treesize of input 92 treesize of output 59 [2021-07-13 20:50:33,617 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:50:33,896 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 227 [2021-07-13 20:50:33,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:50:33,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:33,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:33,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:33,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:33,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:33,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:33,965 INFO L354 Elim1Store]: treesize reduction 63, result has 13.7 percent of original size [2021-07-13 20:50:33,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 9 case distinctions, treesize of input 102 treesize of output 63 [2021-07-13 20:50:33,967 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:50:33,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:33,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:33,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:33,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:33,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:33,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:34,014 INFO L354 Elim1Store]: treesize reduction 63, result has 13.7 percent of original size [2021-07-13 20:50:34,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 9 case distinctions, treesize of input 96 treesize of output 61 [2021-07-13 20:50:34,016 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:50:34,255 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2021-07-13 20:50:34,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:50:34,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:34,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:34,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:34,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:34,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:34,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:34,302 INFO L354 Elim1Store]: treesize reduction 63, result has 13.7 percent of original size [2021-07-13 20:50:34,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 9 case distinctions, treesize of input 95 treesize of output 60 [2021-07-13 20:50:34,303 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:50:34,522 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2021-07-13 20:50:34,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:50:34,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:34,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:34,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:34,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:34,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:34,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:50:34,566 INFO L354 Elim1Store]: treesize reduction 63, result has 13.7 percent of original size [2021-07-13 20:50:34,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 9 case distinctions, treesize of input 102 treesize of output 65 [2021-07-13 20:50:34,567 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:50:34,757 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-07-13 20:50:34,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:50:34,766 INFO L550 ElimStorePlain]: Start of recursive call 1: 40 dim-0 vars, 10 dim-1 vars, End of recursive call: and 11 xjuncts. [2021-07-13 20:50:34,767 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 50 variables, input treesize:2541, output treesize:167 [2021-07-13 20:50:34,896 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 20:50:34,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35796310] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:34,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:50:34,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 20:50:34,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193347776] [2021-07-13 20:50:34,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:50:34,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:50:34,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:50:34,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:50:34,897 INFO L87 Difference]: Start difference. First operand 43662 states and 168484 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 20:50:35,740 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 56 [2021-07-13 20:50:36,332 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 64 [2021-07-13 20:50:36,893 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 66 [2021-07-13 20:50:37,208 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 74 [2021-07-13 20:50:37,364 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2021-07-13 20:50:39,050 WARN L205 SmtUtils]: Spent 1.49 s on a formula simplification. DAG size of input: 183 DAG size of output: 155 [2021-07-13 20:50:39,323 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 61 [2021-07-13 20:50:40,165 WARN L205 SmtUtils]: Spent 633.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 105 [2021-07-13 20:50:40,696 WARN L205 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 82 [2021-07-13 20:50:42,354 WARN L205 SmtUtils]: Spent 1.53 s on a formula simplification. DAG size of input: 190 DAG size of output: 155 [2021-07-13 20:50:46,548 WARN L205 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 281 DAG size of output: 228 [2021-07-13 20:50:47,035 WARN L205 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 68 [2021-07-13 20:50:47,363 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 70 [2021-07-13 20:50:47,732 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 78 [2021-07-13 20:50:49,782 WARN L205 SmtUtils]: Spent 1.69 s on a formula simplification. DAG size of input: 227 DAG size of output: 167 [2021-07-13 20:50:51,815 WARN L205 SmtUtils]: Spent 1.80 s on a formula simplification. DAG size of input: 208 DAG size of output: 166 [2021-07-13 20:50:52,103 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-07-13 20:50:53,976 WARN L205 SmtUtils]: Spent 1.68 s on a formula simplification. DAG size of input: 194 DAG size of output: 159 [2021-07-13 20:50:54,730 WARN L205 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 85 [2021-07-13 20:50:57,833 WARN L205 SmtUtils]: Spent 2.58 s on a formula simplification. DAG size of input: 291 DAG size of output: 227 [2021-07-13 20:51:01,090 WARN L205 SmtUtils]: Spent 2.91 s on a formula simplification. DAG size of input: 325 DAG size of output: 233 [2021-07-13 20:51:03,042 WARN L205 SmtUtils]: Spent 1.67 s on a formula simplification. DAG size of input: 215 DAG size of output: 166 [2021-07-13 20:51:07,494 WARN L205 SmtUtils]: Spent 2.30 s on a formula simplification. DAG size of input: 306 DAG size of output: 239 [2021-07-13 20:51:07,922 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 88 [2021-07-13 20:51:09,873 WARN L205 SmtUtils]: Spent 1.75 s on a formula simplification. DAG size of input: 201 DAG size of output: 159 [2021-07-13 20:51:12,695 WARN L205 SmtUtils]: Spent 2.26 s on a formula simplification. DAG size of input: 292 DAG size of output: 232 [2021-07-13 20:51:13,518 WARN L205 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 117 [2021-07-13 20:51:13,973 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-07-13 20:51:14,739 WARN L205 SmtUtils]: Spent 554.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 157 [2021-07-13 20:51:15,153 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-07-13 20:51:19,197 WARN L205 SmtUtils]: Spent 3.45 s on a formula simplification. DAG size of input: 302 DAG size of output: 231 [2021-07-13 20:51:20,441 WARN L205 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 114 [2021-07-13 20:51:21,257 WARN L205 SmtUtils]: Spent 619.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 156 [2021-07-13 20:51:21,577 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 108 [2021-07-13 20:51:22,060 WARN L205 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 99 [2021-07-13 20:51:22,838 WARN L205 SmtUtils]: Spent 563.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 162