/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/nonblocking-cntr.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-c7b2d19 [2022-03-15 16:18:38,401 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-15 16:18:38,402 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-15 16:18:38,428 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-15 16:18:38,478 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 [2022-03-15 16:18:38,490 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-15 16:18:38,491 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-15 16:18:38,491 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-15 16:18:38,491 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-15 16:18:38,494 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-15 16:18:38,495 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-15 16:18:38,495 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-15 16:18:38,495 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-15 16:18:38,495 INFO L138 SettingsManager]: * Use SBE=true [2022-03-15 16:18:38,495 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-15 16:18:38,496 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-15 16:18:38,496 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-15 16:18:38,496 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-15 16:18:38,496 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-15 16:18:38,496 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-15 16:18:38,496 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-15 16:18:38,496 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-15 16:18:38,496 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-15 16:18:38,497 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-15 16:18:38,497 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-15 16:18:38,497 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-15 16:18:38,497 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-15 16:18:38,497 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-15 16:18:38,497 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-15 16:18:38,497 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-15 16:18:38,497 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 16:18:38,497 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-15 16:18:38,498 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-15 16:18:38,498 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-15 16:18:38,498 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-15 16:18:38,498 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-15 16:18:38,498 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-15 16:18:38,498 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-15 16:18:38,498 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-15 16:18:38,667 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-15 16:18:38,691 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-15 16:18:38,692 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-15 16:18:38,693 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-15 16:18:38,703 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-15 16:18:38,704 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/nonblocking-cntr.wvr.bpl [2022-03-15 16:18:38,704 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/nonblocking-cntr.wvr.bpl' [2022-03-15 16:18:38,722 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-15 16:18:38,723 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-15 16:18:38,724 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-15 16:18:38,724 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-15 16:18:38,724 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-15 16:18:38,731 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:18:38" (1/1) ... [2022-03-15 16:18:38,735 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:18:38" (1/1) ... [2022-03-15 16:18:38,744 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-15 16:18:38,745 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-15 16:18:38,746 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-15 16:18:38,746 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-15 16:18:38,746 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-15 16:18:38,751 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:18:38" (1/1) ... [2022-03-15 16:18:38,751 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:18:38" (1/1) ... [2022-03-15 16:18:38,751 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:18:38" (1/1) ... [2022-03-15 16:18:38,754 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:18:38" (1/1) ... [2022-03-15 16:18:38,755 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:18:38" (1/1) ... [2022-03-15 16:18:38,757 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:18:38" (1/1) ... [2022-03-15 16:18:38,757 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:18:38" (1/1) ... [2022-03-15 16:18:38,758 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-15 16:18:38,758 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-15 16:18:38,758 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-15 16:18:38,758 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-15 16:18:38,759 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:18:38" (1/1) ... [2022-03-15 16:18:38,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 16:18:38,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:18:38,783 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-15 16:18:38,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-15 16:18:38,811 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-15 16:18:38,811 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-15 16:18:38,811 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-15 16:18:38,811 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-15 16:18:38,811 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-15 16:18:38,812 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-15 16:18:38,812 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-15 16:18:38,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-15 16:18:38,812 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-15 16:18:38,813 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-15 16:18:38,854 INFO L234 CfgBuilder]: Building ICFG [2022-03-15 16:18:38,855 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-15 16:18:38,944 INFO L275 CfgBuilder]: Performing block encoding [2022-03-15 16:18:38,967 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-15 16:18:38,967 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-15 16:18:38,971 INFO L202 PluginConnector]: Adding new model nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 04:18:38 BoogieIcfgContainer [2022-03-15 16:18:38,972 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-15 16:18:38,974 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-15 16:18:38,975 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-15 16:18:38,977 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-15 16:18:38,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:18:38" (1/2) ... [2022-03-15 16:18:38,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@640b145b and model type nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.03 04:18:38, skipping insertion in model container [2022-03-15 16:18:38,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 04:18:38" (2/2) ... [2022-03-15 16:18:38,979 INFO L111 eAbstractionObserver]: Analyzing ICFG nonblocking-cntr.wvr.bpl [2022-03-15 16:18:38,982 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-15 16:18:38,982 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-15 16:18:38,983 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-15 16:18:38,983 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-15 16:18:39,019 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-03-15 16:18:39,048 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-15 16:18:39,053 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-15 16:18:39,053 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-03-15 16:18:39,059 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 23 transitions, 62 flow [2022-03-15 16:18:39,079 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 33 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:39,081 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:39,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 16:18:39,087 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:18:39,087 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:18:39,087 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:18:39,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:18:39,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1631855703, now seen corresponding path program 1 times [2022-03-15 16:18:39,107 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:18:39,107 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516969891] [2022-03-15 16:18:39,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:18:39,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:18:39,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:18:39,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:39,229 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:18:39,229 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516969891] [2022-03-15 16:18:39,229 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516969891] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:18:39,229 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:18:39,230 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-15 16:18:39,231 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451754302] [2022-03-15 16:18:39,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:18:39,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 16:18:39,234 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:18:39,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 16:18:39,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-15 16:18:39,253 INFO L87 Difference]: Start difference. First operand has 33 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:39,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:18:39,319 INFO L93 Difference]: Finished difference Result 43 states and 77 transitions. [2022-03-15 16:18:39,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 16:18:39,321 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 16:18:39,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:18:39,326 INFO L225 Difference]: With dead ends: 43 [2022-03-15 16:18:39,326 INFO L226 Difference]: Without dead ends: 43 [2022-03-15 16:18:39,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-15 16:18:39,331 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 14 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:18:39,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 30 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:18:39,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-15 16:18:39,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2022-03-15 16:18:39,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 37 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:39,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 67 transitions. [2022-03-15 16:18:39,365 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 67 transitions. Word has length 15 [2022-03-15 16:18:39,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:18:39,366 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 67 transitions. [2022-03-15 16:18:39,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:39,366 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 67 transitions. [2022-03-15 16:18:39,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 16:18:39,367 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:18:39,367 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:18:39,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-15 16:18:39,368 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:18:39,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:18:39,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1473491929, now seen corresponding path program 1 times [2022-03-15 16:18:39,369 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:18:39,369 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252810028] [2022-03-15 16:18:39,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:18:39,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:18:39,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:18:39,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:18:39,455 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:18:39,455 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252810028] [2022-03-15 16:18:39,455 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252810028] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:18:39,456 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:18:39,456 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-15 16:18:39,456 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681346477] [2022-03-15 16:18:39,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:18:39,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 16:18:39,457 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:18:39,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 16:18:39,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-15 16:18:39,458 INFO L87 Difference]: Start difference. First operand 38 states and 67 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:39,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:18:39,512 INFO L93 Difference]: Finished difference Result 50 states and 91 transitions. [2022-03-15 16:18:39,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 16:18:39,513 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 16:18:39,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:18:39,514 INFO L225 Difference]: With dead ends: 50 [2022-03-15 16:18:39,514 INFO L226 Difference]: Without dead ends: 50 [2022-03-15 16:18:39,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-15 16:18:39,516 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 15 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:18:39,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 27 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:18:39,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-15 16:18:39,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2022-03-15 16:18:39,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 43 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:39,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 79 transitions. [2022-03-15 16:18:39,522 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 79 transitions. Word has length 17 [2022-03-15 16:18:39,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:18:39,522 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 79 transitions. [2022-03-15 16:18:39,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:39,523 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 79 transitions. [2022-03-15 16:18:39,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 16:18:39,523 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:18:39,523 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:18:39,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-15 16:18:39,524 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:18:39,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:18:39,524 INFO L85 PathProgramCache]: Analyzing trace with hash 917506533, now seen corresponding path program 1 times [2022-03-15 16:18:39,525 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:18:39,525 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081757150] [2022-03-15 16:18:39,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:18:39,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:18:39,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:18:39,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:39,599 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:18:39,599 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081757150] [2022-03-15 16:18:39,599 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081757150] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:18:39,600 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539223157] [2022-03-15 16:18:39,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:18:39,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:39,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:18:39,602 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:18:39,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-15 16:18:39,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:18:39,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:18:39,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:18:39,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:39,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:18:39,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:39,879 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539223157] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:18:39,879 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:18:39,880 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5] total 6 [2022-03-15 16:18:39,880 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587424873] [2022-03-15 16:18:39,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:18:39,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 16:18:39,880 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:18:39,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 16:18:39,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-15 16:18:39,881 INFO L87 Difference]: Start difference. First operand 44 states and 79 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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) [2022-03-15 16:18:39,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:18:39,916 INFO L93 Difference]: Finished difference Result 99 states and 185 transitions. [2022-03-15 16:18:39,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-15 16:18:39,916 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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 19 [2022-03-15 16:18:39,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:18:39,917 INFO L225 Difference]: With dead ends: 99 [2022-03-15 16:18:39,917 INFO L226 Difference]: Without dead ends: 78 [2022-03-15 16:18:39,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-15 16:18:39,918 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 21 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:18:39,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 58 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:18:39,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-03-15 16:18:39,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 59. [2022-03-15 16:18:39,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.9310344827586208) internal successors, (112), 58 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:39,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 112 transitions. [2022-03-15 16:18:39,928 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 112 transitions. Word has length 19 [2022-03-15 16:18:39,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:18:39,929 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 112 transitions. [2022-03-15 16:18:39,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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) [2022-03-15 16:18:39,929 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 112 transitions. [2022-03-15 16:18:39,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 16:18:39,930 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:18:39,930 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:18:39,948 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-15 16:18:40,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:40,147 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:18:40,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:18:40,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1069238711, now seen corresponding path program 2 times [2022-03-15 16:18:40,148 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:18:40,148 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569059004] [2022-03-15 16:18:40,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:18:40,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:18:40,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:18:40,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:40,214 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:18:40,214 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569059004] [2022-03-15 16:18:40,214 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569059004] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:18:40,214 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915981457] [2022-03-15 16:18:40,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:18:40,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:40,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:18:40,216 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:18:40,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-15 16:18:40,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:18:40,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:18:40,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-15 16:18:40,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:18:40,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:40,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:18:40,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:40,505 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915981457] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:18:40,506 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:18:40,506 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-03-15 16:18:40,507 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938331299] [2022-03-15 16:18:40,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:18:40,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 16:18:40,509 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:18:40,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 16:18:40,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-03-15 16:18:40,510 INFO L87 Difference]: Start difference. First operand 59 states and 112 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) [2022-03-15 16:18:40,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:18:40,562 INFO L93 Difference]: Finished difference Result 80 states and 151 transitions. [2022-03-15 16:18:40,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 16:18:40,562 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 19 [2022-03-15 16:18:40,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:18:40,563 INFO L225 Difference]: With dead ends: 80 [2022-03-15 16:18:40,563 INFO L226 Difference]: Without dead ends: 77 [2022-03-15 16:18:40,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-03-15 16:18:40,564 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 19 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:18:40,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 59 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:18:40,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-15 16:18:40,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2022-03-15 16:18:40,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.9333333333333333) internal successors, (116), 60 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:40,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 116 transitions. [2022-03-15 16:18:40,569 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 116 transitions. Word has length 19 [2022-03-15 16:18:40,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:18:40,569 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 116 transitions. [2022-03-15 16:18:40,570 INFO L471 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) [2022-03-15 16:18:40,570 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 116 transitions. [2022-03-15 16:18:40,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 16:18:40,570 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:18:40,570 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:18:40,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-15 16:18:40,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-15 16:18:40,787 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:18:40,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:18:40,787 INFO L85 PathProgramCache]: Analyzing trace with hash 859525155, now seen corresponding path program 3 times [2022-03-15 16:18:40,787 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:18:40,788 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592477757] [2022-03-15 16:18:40,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:18:40,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:18:40,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:18:40,852 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:40,852 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:18:40,855 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592477757] [2022-03-15 16:18:40,855 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592477757] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:18:40,855 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716307682] [2022-03-15 16:18:40,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:18:40,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:40,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:18:40,860 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:18:40,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-15 16:18:40,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:18:40,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:18:40,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-15 16:18:40,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:18:41,074 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:41,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:18:41,179 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:41,179 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716307682] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:18:41,179 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:18:41,179 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-03-15 16:18:41,180 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93714366] [2022-03-15 16:18:41,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:18:41,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 16:18:41,180 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:18:41,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 16:18:41,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2022-03-15 16:18:41,181 INFO L87 Difference]: Start difference. First operand 61 states and 116 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2022-03-15 16:18:41,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:18:41,541 INFO L93 Difference]: Finished difference Result 208 states and 386 transitions. [2022-03-15 16:18:41,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 16:18:41,542 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 21 [2022-03-15 16:18:41,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:18:41,543 INFO L225 Difference]: With dead ends: 208 [2022-03-15 16:18:41,543 INFO L226 Difference]: Without dead ends: 202 [2022-03-15 16:18:41,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=367, Invalid=893, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 16:18:41,544 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 213 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:18:41,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 93 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:18:41,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-03-15 16:18:41,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 90. [2022-03-15 16:18:41,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.033707865168539) internal successors, (181), 89 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:41,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 181 transitions. [2022-03-15 16:18:41,552 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 181 transitions. Word has length 21 [2022-03-15 16:18:41,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:18:41,552 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 181 transitions. [2022-03-15 16:18:41,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2022-03-15 16:18:41,552 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 181 transitions. [2022-03-15 16:18:41,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 16:18:41,553 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:18:41,553 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:18:41,595 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-15 16:18:41,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:41,779 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:18:41,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:18:41,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1109337493, now seen corresponding path program 4 times [2022-03-15 16:18:41,780 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:18:41,781 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244965523] [2022-03-15 16:18:41,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:18:41,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:18:41,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:18:41,829 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:41,830 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:18:41,830 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244965523] [2022-03-15 16:18:41,830 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244965523] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:18:41,830 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934023023] [2022-03-15 16:18:41,830 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:18:41,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:41,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:18:41,831 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:18:41,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-15 16:18:41,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:18:41,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:18:41,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 16:18:41,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:18:41,994 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:41,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:18:42,113 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:42,114 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934023023] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:18:42,114 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:18:42,114 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 15 [2022-03-15 16:18:42,114 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359178786] [2022-03-15 16:18:42,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:18:42,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 16:18:42,114 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:18:42,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 16:18:42,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2022-03-15 16:18:42,115 INFO L87 Difference]: Start difference. First operand 90 states and 181 transitions. Second operand has 16 states, 16 states have (on average 2.625) 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) [2022-03-15 16:18:42,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:18:42,364 INFO L93 Difference]: Finished difference Result 170 states and 325 transitions. [2022-03-15 16:18:42,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 16:18:42,365 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) 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 21 [2022-03-15 16:18:42,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:18:42,366 INFO L225 Difference]: With dead ends: 170 [2022-03-15 16:18:42,366 INFO L226 Difference]: Without dead ends: 166 [2022-03-15 16:18:42,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=268, Invalid=602, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:18:42,367 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 136 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:18:42,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 44 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:18:42,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-03-15 16:18:42,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 92. [2022-03-15 16:18:42,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.010989010989011) internal successors, (183), 91 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:42,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 183 transitions. [2022-03-15 16:18:42,372 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 183 transitions. Word has length 21 [2022-03-15 16:18:42,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:18:42,372 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 183 transitions. [2022-03-15 16:18:42,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) 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) [2022-03-15 16:18:42,372 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 183 transitions. [2022-03-15 16:18:42,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:18:42,373 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:18:42,373 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:18:42,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-15 16:18:42,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:42,584 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:18:42,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:18:42,584 INFO L85 PathProgramCache]: Analyzing trace with hash 446728737, now seen corresponding path program 5 times [2022-03-15 16:18:42,584 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:18:42,584 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936691299] [2022-03-15 16:18:42,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:18:42,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:18:42,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:18:42,657 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:42,657 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:18:42,657 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936691299] [2022-03-15 16:18:42,657 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936691299] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:18:42,657 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252838216] [2022-03-15 16:18:42,658 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:18:42,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:42,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:18:42,659 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:18:42,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-15 16:18:42,682 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:18:42,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:18:42,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 16:18:42,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:18:42,751 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:42,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:18:42,862 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:42,862 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252838216] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:18:42,862 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:18:42,862 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 7] total 9 [2022-03-15 16:18:42,862 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169393585] [2022-03-15 16:18:42,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:18:42,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 16:18:42,863 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:18:42,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 16:18:42,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-03-15 16:18:42,863 INFO L87 Difference]: Start difference. First operand 92 states and 183 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 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) [2022-03-15 16:18:42,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:18:42,897 INFO L93 Difference]: Finished difference Result 190 states and 376 transitions. [2022-03-15 16:18:42,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 16:18:42,897 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 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 23 [2022-03-15 16:18:42,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:18:42,898 INFO L225 Difference]: With dead ends: 190 [2022-03-15 16:18:42,898 INFO L226 Difference]: Without dead ends: 163 [2022-03-15 16:18:42,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-03-15 16:18:42,898 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 50 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:18:42,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 103 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:18:42,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-03-15 16:18:42,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 120. [2022-03-15 16:18:42,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.0840336134453783) internal successors, (248), 119 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:42,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 248 transitions. [2022-03-15 16:18:42,904 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 248 transitions. Word has length 23 [2022-03-15 16:18:42,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:18:42,904 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 248 transitions. [2022-03-15 16:18:42,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 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) [2022-03-15 16:18:42,904 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 248 transitions. [2022-03-15 16:18:42,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:18:42,905 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:18:42,905 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:18:42,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-15 16:18:43,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:43,121 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:18:43,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:18:43,122 INFO L85 PathProgramCache]: Analyzing trace with hash -948358029, now seen corresponding path program 6 times [2022-03-15 16:18:43,122 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:18:43,122 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668908842] [2022-03-15 16:18:43,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:18:43,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:18:43,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:18:43,242 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:43,243 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:18:43,243 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668908842] [2022-03-15 16:18:43,243 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668908842] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:18:43,243 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523982271] [2022-03-15 16:18:43,243 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:18:43,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:43,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:18:43,244 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:18:43,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-15 16:18:43,267 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 16:18:43,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:18:43,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 16:18:43,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:18:43,441 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:43,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:18:43,747 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:43,747 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523982271] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:18:43,747 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:18:43,747 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-03-15 16:18:43,747 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090531678] [2022-03-15 16:18:43,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:18:43,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 16:18:43,749 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:18:43,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 16:18:43,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2022-03-15 16:18:43,749 INFO L87 Difference]: Start difference. First operand 120 states and 248 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:45,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:18:45,251 INFO L93 Difference]: Finished difference Result 529 states and 1017 transitions. [2022-03-15 16:18:45,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-15 16:18:45,252 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:18:45,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:18:45,254 INFO L225 Difference]: With dead ends: 529 [2022-03-15 16:18:45,254 INFO L226 Difference]: Without dead ends: 493 [2022-03-15 16:18:45,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1180 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=948, Invalid=2834, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 16:18:45,255 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 324 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:18:45,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 130 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:18:45,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2022-03-15 16:18:45,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 207. [2022-03-15 16:18:45,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.150485436893204) internal successors, (443), 206 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:45,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 443 transitions. [2022-03-15 16:18:45,264 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 443 transitions. Word has length 23 [2022-03-15 16:18:45,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:18:45,264 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 443 transitions. [2022-03-15 16:18:45,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:45,265 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 443 transitions. [2022-03-15 16:18:45,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:18:45,265 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:18:45,265 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:18:45,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-15 16:18:45,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:45,479 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:18:45,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:18:45,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1017367007, now seen corresponding path program 7 times [2022-03-15 16:18:45,480 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:18:45,480 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715993763] [2022-03-15 16:18:45,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:18:45,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:18:45,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:18:45,541 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:45,541 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:18:45,542 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715993763] [2022-03-15 16:18:45,542 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715993763] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:18:45,542 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743887672] [2022-03-15 16:18:45,542 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:18:45,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:45,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:18:45,543 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:18:45,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-15 16:18:45,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:18:45,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-15 16:18:45,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:18:45,721 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:45,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:18:45,944 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:45,945 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743887672] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:18:45,945 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:18:45,945 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 20 [2022-03-15 16:18:45,945 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511499436] [2022-03-15 16:18:45,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:18:45,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:18:45,945 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:18:45,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:18:45,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:18:45,946 INFO L87 Difference]: Start difference. First operand 207 states and 443 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) [2022-03-15 16:18:46,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:18:46,244 INFO L93 Difference]: Finished difference Result 415 states and 857 transitions. [2022-03-15 16:18:46,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 16:18:46,244 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 23 [2022-03-15 16:18:46,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:18:46,246 INFO L225 Difference]: With dead ends: 415 [2022-03-15 16:18:46,246 INFO L226 Difference]: Without dead ends: 411 [2022-03-15 16:18:46,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=326, Invalid=864, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 16:18:46,246 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 229 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:18:46,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 67 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:18:46,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2022-03-15 16:18:46,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 259. [2022-03-15 16:18:46,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 2.197674418604651) internal successors, (567), 258 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:46,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 567 transitions. [2022-03-15 16:18:46,255 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 567 transitions. Word has length 23 [2022-03-15 16:18:46,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:18:46,255 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 567 transitions. [2022-03-15 16:18:46,255 INFO L471 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) [2022-03-15 16:18:46,255 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 567 transitions. [2022-03-15 16:18:46,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 16:18:46,256 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:18:46,256 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:18:46,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-15 16:18:46,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:46,461 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:18:46,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:18:46,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1216183969, now seen corresponding path program 8 times [2022-03-15 16:18:46,462 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:18:46,462 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827311888] [2022-03-15 16:18:46,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:18:46,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:18:46,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:18:46,534 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:46,535 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:18:46,535 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827311888] [2022-03-15 16:18:46,535 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827311888] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:18:46,535 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868016404] [2022-03-15 16:18:46,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:18:46,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:46,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:18:46,536 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:18:46,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-15 16:18:46,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:18:46,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:18:46,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-15 16:18:46,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:18:46,773 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:46,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:18:46,984 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:46,985 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868016404] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:18:46,985 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:18:46,985 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 24 [2022-03-15 16:18:46,985 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199937430] [2022-03-15 16:18:46,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:18:46,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:18:46,985 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:18:46,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:18:46,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=465, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:18:46,986 INFO L87 Difference]: Start difference. First operand 259 states and 567 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:47,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:18:47,620 INFO L93 Difference]: Finished difference Result 574 states and 1166 transitions. [2022-03-15 16:18:47,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 16:18:47,621 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 16:18:47,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:18:47,622 INFO L225 Difference]: With dead ends: 574 [2022-03-15 16:18:47,622 INFO L226 Difference]: Without dead ends: 553 [2022-03-15 16:18:47,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=769, Invalid=2201, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 16:18:47,624 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 199 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:18:47,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 132 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:18:47,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2022-03-15 16:18:47,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 235. [2022-03-15 16:18:47,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.1709401709401708) internal successors, (508), 234 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:47,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 508 transitions. [2022-03-15 16:18:47,629 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 508 transitions. Word has length 25 [2022-03-15 16:18:47,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:18:47,630 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 508 transitions. [2022-03-15 16:18:47,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:47,630 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 508 transitions. [2022-03-15 16:18:47,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 16:18:47,630 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:18:47,630 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:18:47,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-15 16:18:47,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-15 16:18:47,848 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:18:47,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:18:47,849 INFO L85 PathProgramCache]: Analyzing trace with hash -580006123, now seen corresponding path program 9 times [2022-03-15 16:18:47,849 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:18:47,849 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42672559] [2022-03-15 16:18:47,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:18:47,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:18:47,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:18:47,898 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:47,898 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:18:47,899 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42672559] [2022-03-15 16:18:47,899 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42672559] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:18:47,899 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316945371] [2022-03-15 16:18:47,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:18:47,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:47,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:18:47,900 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:18:47,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-15 16:18:47,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 16:18:47,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:18:47,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 16:18:47,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:18:48,093 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:48,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:18:48,282 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:48,283 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316945371] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:18:48,283 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:18:48,283 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 9] total 20 [2022-03-15 16:18:48,283 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041137229] [2022-03-15 16:18:48,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:18:48,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:18:48,283 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:18:48,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:18:48,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:18:48,284 INFO L87 Difference]: Start difference. First operand 235 states and 508 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:48,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:18:48,706 INFO L93 Difference]: Finished difference Result 389 states and 796 transitions. [2022-03-15 16:18:48,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 16:18:48,707 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 16:18:48,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:18:48,708 INFO L225 Difference]: With dead ends: 389 [2022-03-15 16:18:48,708 INFO L226 Difference]: Without dead ends: 385 [2022-03-15 16:18:48,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=549, Invalid=1343, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 16:18:48,709 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 212 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:18:48,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 43 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:18:48,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2022-03-15 16:18:48,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 235. [2022-03-15 16:18:48,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.1666666666666665) internal successors, (507), 234 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:48,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 507 transitions. [2022-03-15 16:18:48,714 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 507 transitions. Word has length 25 [2022-03-15 16:18:48,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:18:48,714 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 507 transitions. [2022-03-15 16:18:48,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:48,714 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 507 transitions. [2022-03-15 16:18:48,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:18:48,715 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:18:48,715 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:18:48,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-15 16:18:48,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:48,915 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:18:48,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:18:48,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1444914083, now seen corresponding path program 10 times [2022-03-15 16:18:48,916 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:18:48,916 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673218950] [2022-03-15 16:18:48,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:18:48,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:18:48,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:18:48,973 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:48,973 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:18:48,973 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673218950] [2022-03-15 16:18:48,973 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673218950] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:18:48,973 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454200056] [2022-03-15 16:18:48,973 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:18:48,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:48,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:18:48,974 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:18:48,997 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:18:48,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:18:48,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 16:18:48,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:18:48,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-15 16:18:49,060 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:49,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:18:49,196 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:49,196 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454200056] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:18:49,196 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:18:49,196 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 9] total 12 [2022-03-15 16:18:49,196 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056249033] [2022-03-15 16:18:49,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:18:49,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 16:18:49,196 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:18:49,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 16:18:49,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-03-15 16:18:49,197 INFO L87 Difference]: Start difference. First operand 235 states and 507 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 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) [2022-03-15 16:18:49,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:18:49,260 INFO L93 Difference]: Finished difference Result 428 states and 902 transitions. [2022-03-15 16:18:49,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-15 16:18:49,261 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 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 27 [2022-03-15 16:18:49,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:18:49,262 INFO L225 Difference]: With dead ends: 428 [2022-03-15 16:18:49,262 INFO L226 Difference]: Without dead ends: 395 [2022-03-15 16:18:49,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-03-15 16:18:49,263 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 101 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:18:49,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 151 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:18:49,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2022-03-15 16:18:49,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 313. [2022-03-15 16:18:49,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 2.217948717948718) internal successors, (692), 312 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:49,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 692 transitions. [2022-03-15 16:18:49,269 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 692 transitions. Word has length 27 [2022-03-15 16:18:49,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:18:49,269 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 692 transitions. [2022-03-15 16:18:49,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 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) [2022-03-15 16:18:49,269 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 692 transitions. [2022-03-15 16:18:49,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:18:49,270 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:18:49,270 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:18:49,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-15 16:18:49,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-15 16:18:49,483 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:18:49,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:18:49,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1020645679, now seen corresponding path program 11 times [2022-03-15 16:18:49,484 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:18:49,484 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953901648] [2022-03-15 16:18:49,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:18:49,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:18:49,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:18:49,604 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:49,604 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:18:49,604 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953901648] [2022-03-15 16:18:49,604 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953901648] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:18:49,604 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707645119] [2022-03-15 16:18:49,604 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:18:49,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:49,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:18:49,605 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:18:49,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-15 16:18:49,626 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 16:18:49,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:18:49,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 16:18:49,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:18:49,857 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:49,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:18:50,382 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:50,382 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707645119] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:18:50,383 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:18:50,383 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 28 [2022-03-15 16:18:50,383 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491576453] [2022-03-15 16:18:50,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:18:50,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:18:50,383 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:18:50,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:18:50,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=664, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:18:50,384 INFO L87 Difference]: Start difference. First operand 313 states and 692 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:53,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:18:53,200 INFO L93 Difference]: Finished difference Result 1070 states and 2162 transitions. [2022-03-15 16:18:53,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-15 16:18:53,200 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:18:53,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:18:53,203 INFO L225 Difference]: With dead ends: 1070 [2022-03-15 16:18:53,203 INFO L226 Difference]: Without dead ends: 989 [2022-03-15 16:18:53,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2262 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1613, Invalid=5193, Unknown=0, NotChecked=0, Total=6806 [2022-03-15 16:18:53,205 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 474 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:18:53,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [474 Valid, 209 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 736 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:18:53,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2022-03-15 16:18:53,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 448. [2022-03-15 16:18:53,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 447 states have (on average 2.1834451901565997) internal successors, (976), 447 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:53,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 976 transitions. [2022-03-15 16:18:53,216 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 976 transitions. Word has length 27 [2022-03-15 16:18:53,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:18:53,216 INFO L470 AbstractCegarLoop]: Abstraction has 448 states and 976 transitions. [2022-03-15 16:18:53,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:53,216 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 976 transitions. [2022-03-15 16:18:53,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:18:53,217 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:18:53,217 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:18:53,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-15 16:18:53,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-15 16:18:53,431 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:18:53,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:18:53,432 INFO L85 PathProgramCache]: Analyzing trace with hash 275669725, now seen corresponding path program 12 times [2022-03-15 16:18:53,432 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:18:53,432 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000598994] [2022-03-15 16:18:53,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:18:53,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:18:53,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:18:53,523 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:53,523 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:18:53,523 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000598994] [2022-03-15 16:18:53,523 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000598994] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:18:53,523 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888086227] [2022-03-15 16:18:53,523 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:18:53,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:53,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:18:53,525 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:18:53,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-15 16:18:53,545 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-15 16:18:53,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:18:53,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 16:18:53,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:18:53,750 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:53,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:18:54,101 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:54,102 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888086227] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:18:54,102 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:18:54,102 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 26 [2022-03-15 16:18:54,102 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838947245] [2022-03-15 16:18:54,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:18:54,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:18:54,102 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:18:54,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:18:54,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=531, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:18:54,103 INFO L87 Difference]: Start difference. First operand 448 states and 976 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:55,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:18:55,028 INFO L93 Difference]: Finished difference Result 1546 states and 3357 transitions. [2022-03-15 16:18:55,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-15 16:18:55,028 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:18:55,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:18:55,034 INFO L225 Difference]: With dead ends: 1546 [2022-03-15 16:18:55,034 INFO L226 Difference]: Without dead ends: 1536 [2022-03-15 16:18:55,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1244 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1059, Invalid=2973, Unknown=0, NotChecked=0, Total=4032 [2022-03-15 16:18:55,035 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 248 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:18:55,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 123 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:18:55,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1536 states. [2022-03-15 16:18:55,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1536 to 546. [2022-03-15 16:18:55,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 545 states have (on average 2.2605504587155965) internal successors, (1232), 545 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:55,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 1232 transitions. [2022-03-15 16:18:55,051 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 1232 transitions. Word has length 27 [2022-03-15 16:18:55,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:18:55,051 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 1232 transitions. [2022-03-15 16:18:55,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:55,052 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 1232 transitions. [2022-03-15 16:18:55,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 16:18:55,053 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:18:55,053 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:18:55,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-15 16:18:55,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-15 16:18:55,263 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:18:55,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:18:55,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1973910373, now seen corresponding path program 13 times [2022-03-15 16:18:55,263 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:18:55,263 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221222742] [2022-03-15 16:18:55,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:18:55,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:18:55,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:18:55,356 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:55,356 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:18:55,356 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221222742] [2022-03-15 16:18:55,356 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221222742] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:18:55,356 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546439422] [2022-03-15 16:18:55,356 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:18:55,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:55,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:18:55,357 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:18:55,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-15 16:18:55,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:18:55,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 16:18:55,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:18:55,620 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:55,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:18:55,879 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:55,880 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546439422] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:18:55,880 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:18:55,880 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 30 [2022-03-15 16:18:55,880 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755664779] [2022-03-15 16:18:55,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:18:55,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:18:55,880 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:18:55,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:18:55,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=731, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:18:55,881 INFO L87 Difference]: Start difference. First operand 546 states and 1232 transitions. Second operand has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:56,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:18:56,881 INFO L93 Difference]: Finished difference Result 1098 states and 2300 transitions. [2022-03-15 16:18:56,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-15 16:18:56,881 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-15 16:18:56,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:18:56,884 INFO L225 Difference]: With dead ends: 1098 [2022-03-15 16:18:56,884 INFO L226 Difference]: Without dead ends: 1035 [2022-03-15 16:18:56,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1623 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1432, Invalid=4268, Unknown=0, NotChecked=0, Total=5700 [2022-03-15 16:18:56,885 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 273 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:18:56,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 174 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 726 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:18:56,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2022-03-15 16:18:56,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 503. [2022-03-15 16:18:56,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 2.256972111553785) internal successors, (1133), 502 states have internal predecessors, (1133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:56,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 1133 transitions. [2022-03-15 16:18:56,895 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 1133 transitions. Word has length 29 [2022-03-15 16:18:56,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:18:56,895 INFO L470 AbstractCegarLoop]: Abstraction has 503 states and 1133 transitions. [2022-03-15 16:18:56,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:56,896 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 1133 transitions. [2022-03-15 16:18:56,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 16:18:56,896 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:18:56,896 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:18:56,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-15 16:18:57,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-15 16:18:57,111 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:18:57,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:18:57,111 INFO L85 PathProgramCache]: Analyzing trace with hash 592333205, now seen corresponding path program 14 times [2022-03-15 16:18:57,111 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:18:57,111 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350578745] [2022-03-15 16:18:57,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:18:57,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:18:57,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:18:57,183 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:57,183 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:18:57,183 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350578745] [2022-03-15 16:18:57,183 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350578745] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:18:57,183 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855749253] [2022-03-15 16:18:57,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:18:57,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:57,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:18:57,184 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:18:57,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-15 16:18:57,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:18:57,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:18:57,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 16:18:57,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:18:57,423 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:57,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:18:57,687 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:57,688 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855749253] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:18:57,688 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:18:57,688 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 11] total 25 [2022-03-15 16:18:57,688 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144862710] [2022-03-15 16:18:57,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:18:57,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:18:57,688 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:18:57,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:18:57,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:18:57,689 INFO L87 Difference]: Start difference. First operand 503 states and 1133 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:58,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:18:58,337 INFO L93 Difference]: Finished difference Result 753 states and 1609 transitions. [2022-03-15 16:18:58,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-15 16:18:58,338 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-15 16:18:58,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:18:58,340 INFO L225 Difference]: With dead ends: 753 [2022-03-15 16:18:58,340 INFO L226 Difference]: Without dead ends: 749 [2022-03-15 16:18:58,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=992, Invalid=2548, Unknown=0, NotChecked=0, Total=3540 [2022-03-15 16:18:58,341 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 175 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:18:58,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 84 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:18:58,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-03-15 16:18:58,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 503. [2022-03-15 16:18:58,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 2.254980079681275) internal successors, (1132), 502 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:58,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 1132 transitions. [2022-03-15 16:18:58,349 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 1132 transitions. Word has length 29 [2022-03-15 16:18:58,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:18:58,349 INFO L470 AbstractCegarLoop]: Abstraction has 503 states and 1132 transitions. [2022-03-15 16:18:58,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:58,350 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 1132 transitions. [2022-03-15 16:18:58,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 16:18:58,350 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:18:58,350 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:18:58,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-15 16:18:58,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:58,563 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:18:58,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:18:58,564 INFO L85 PathProgramCache]: Analyzing trace with hash -224049671, now seen corresponding path program 15 times [2022-03-15 16:18:58,564 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:18:58,564 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453795183] [2022-03-15 16:18:58,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:18:58,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:18:58,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:18:58,679 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:58,679 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:18:58,679 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453795183] [2022-03-15 16:18:58,679 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453795183] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:18:58,679 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643286993] [2022-03-15 16:18:58,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:18:58,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:58,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:18:58,681 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:18:58,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-15 16:18:58,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 16:18:58,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:18:58,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 16:18:58,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:18:58,972 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:58,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:18:59,330 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:59,331 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643286993] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:18:59,331 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:18:59,331 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 15] total 36 [2022-03-15 16:18:59,331 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618800288] [2022-03-15 16:18:59,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:18:59,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-15 16:18:59,331 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:18:59,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-15 16:18:59,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=1055, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 16:18:59,332 INFO L87 Difference]: Start difference. First operand 503 states and 1132 transitions. Second operand has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:01,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:19:01,604 INFO L93 Difference]: Finished difference Result 2242 states and 4712 transitions. [2022-03-15 16:19:01,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-03-15 16:19:01,605 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-15 16:19:01,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:19:01,611 INFO L225 Difference]: With dead ends: 2242 [2022-03-15 16:19:01,611 INFO L226 Difference]: Without dead ends: 2141 [2022-03-15 16:19:01,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6873 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3989, Invalid=13041, Unknown=0, NotChecked=0, Total=17030 [2022-03-15 16:19:01,615 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 779 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 1080 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 779 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 1237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:19:01,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [779 Valid, 354 Invalid, 1237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1080 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 16:19:01,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2141 states. [2022-03-15 16:19:01,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2141 to 828. [2022-03-15 16:19:01,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 827 states have (on average 2.2781136638452235) internal successors, (1884), 827 states have internal predecessors, (1884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:01,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1884 transitions. [2022-03-15 16:19:01,635 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1884 transitions. Word has length 29 [2022-03-15 16:19:01,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:19:01,635 INFO L470 AbstractCegarLoop]: Abstraction has 828 states and 1884 transitions. [2022-03-15 16:19:01,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:01,636 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1884 transitions. [2022-03-15 16:19:01,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:19:01,637 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:19:01,637 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:19:01,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-15 16:19:01,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-15 16:19:01,851 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:19:01,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:19:01,852 INFO L85 PathProgramCache]: Analyzing trace with hash 524451993, now seen corresponding path program 16 times [2022-03-15 16:19:01,852 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:19:01,852 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630391300] [2022-03-15 16:19:01,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:19:01,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:19:01,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:19:01,921 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:01,921 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:19:01,921 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630391300] [2022-03-15 16:19:01,921 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630391300] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:19:01,921 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886719354] [2022-03-15 16:19:01,921 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:19:01,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:01,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:19:01,923 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:19:01,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-15 16:19:01,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:19:01,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:19:01,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 16:19:01,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:19:02,042 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:02,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:19:02,361 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:02,361 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886719354] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:19:02,361 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:19:02,361 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 11] total 15 [2022-03-15 16:19:02,361 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453331082] [2022-03-15 16:19:02,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:19:02,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 16:19:02,361 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:19:02,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 16:19:02,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2022-03-15 16:19:02,362 INFO L87 Difference]: Start difference. First operand 828 states and 1884 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 15 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) [2022-03-15 16:19:02,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:19:02,460 INFO L93 Difference]: Finished difference Result 1335 states and 3045 transitions. [2022-03-15 16:19:02,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 16:19:02,460 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 15 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 31 [2022-03-15 16:19:02,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:19:02,464 INFO L225 Difference]: With dead ends: 1335 [2022-03-15 16:19:02,464 INFO L226 Difference]: Without dead ends: 1296 [2022-03-15 16:19:02,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 54 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2022-03-15 16:19:02,464 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 160 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:19:02,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 228 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:19:02,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1296 states. [2022-03-15 16:19:02,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1296 to 1137. [2022-03-15 16:19:02,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 1136 states have (on average 2.3107394366197185) internal successors, (2625), 1136 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:02,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 2625 transitions. [2022-03-15 16:19:02,482 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 2625 transitions. Word has length 31 [2022-03-15 16:19:02,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:19:02,482 INFO L470 AbstractCegarLoop]: Abstraction has 1137 states and 2625 transitions. [2022-03-15 16:19:02,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 15 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) [2022-03-15 16:19:02,482 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 2625 transitions. [2022-03-15 16:19:02,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:19:02,483 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:19:02,483 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:19:02,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-15 16:19:02,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-15 16:19:02,698 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:19:02,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:19:02,699 INFO L85 PathProgramCache]: Analyzing trace with hash -2075385877, now seen corresponding path program 17 times [2022-03-15 16:19:02,699 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:19:02,699 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104103023] [2022-03-15 16:19:02,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:19:02,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:19:02,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:19:02,849 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:02,849 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:19:02,849 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104103023] [2022-03-15 16:19:02,849 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104103023] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:19:02,849 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858331558] [2022-03-15 16:19:02,849 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:19:02,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:02,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:19:02,850 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:19:02,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-15 16:19:02,876 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 16:19:02,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:19:02,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:19:02,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:19:03,145 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:03,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:19:03,915 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:03,915 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858331558] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:19:03,915 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:19:03,915 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 34 [2022-03-15 16:19:03,915 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537001056] [2022-03-15 16:19:03,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:19:03,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-15 16:19:03,916 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:19:03,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-15 16:19:03,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=986, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 16:19:03,916 INFO L87 Difference]: Start difference. First operand 1137 states and 2625 transitions. Second operand has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 34 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:08,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:19:08,435 INFO L93 Difference]: Finished difference Result 2543 states and 5521 transitions. [2022-03-15 16:19:08,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-15 16:19:08,435 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 34 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 16:19:08,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:19:08,442 INFO L225 Difference]: With dead ends: 2543 [2022-03-15 16:19:08,442 INFO L226 Difference]: Without dead ends: 2402 [2022-03-15 16:19:08,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3588 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=2373, Invalid=8133, Unknown=0, NotChecked=0, Total=10506 [2022-03-15 16:19:08,444 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 560 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 1265 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 1474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 1265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:19:08,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [560 Valid, 339 Invalid, 1474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 1265 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 16:19:08,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2402 states. [2022-03-15 16:19:08,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2402 to 1423. [2022-03-15 16:19:08,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1423 states, 1422 states have (on average 2.2623066104078764) internal successors, (3217), 1422 states have internal predecessors, (3217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:08,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1423 states to 1423 states and 3217 transitions. [2022-03-15 16:19:08,471 INFO L78 Accepts]: Start accepts. Automaton has 1423 states and 3217 transitions. Word has length 31 [2022-03-15 16:19:08,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:19:08,471 INFO L470 AbstractCegarLoop]: Abstraction has 1423 states and 3217 transitions. [2022-03-15 16:19:08,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 34 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:08,471 INFO L276 IsEmpty]: Start isEmpty. Operand 1423 states and 3217 transitions. [2022-03-15 16:19:08,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:19:08,473 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:19:08,473 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:19:08,494 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-03-15 16:19:08,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:08,689 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:19:08,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:19:08,689 INFO L85 PathProgramCache]: Analyzing trace with hash 410403225, now seen corresponding path program 18 times [2022-03-15 16:19:08,689 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:19:08,689 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013596008] [2022-03-15 16:19:08,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:19:08,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:19:08,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:19:08,796 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:08,797 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:19:08,797 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013596008] [2022-03-15 16:19:08,797 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013596008] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:19:08,797 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643226577] [2022-03-15 16:19:08,797 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:19:08,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:08,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:19:08,798 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:19:08,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-15 16:19:08,819 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-15 16:19:08,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:19:08,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 16:19:08,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:19:09,103 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:09,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:19:09,619 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:09,619 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643226577] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:19:09,619 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:19:09,619 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 31 [2022-03-15 16:19:09,619 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317390103] [2022-03-15 16:19:09,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:19:09,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:19:09,620 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:19:09,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:19:09,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=756, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:19:09,620 INFO L87 Difference]: Start difference. First operand 1423 states and 3217 transitions. Second operand has 32 states, 32 states have (on average 2.28125) internal successors, (73), 31 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:11,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:19:11,198 INFO L93 Difference]: Finished difference Result 3227 states and 7200 transitions. [2022-03-15 16:19:11,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-15 16:19:11,198 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 31 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 16:19:11,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:19:11,213 INFO L225 Difference]: With dead ends: 3227 [2022-03-15 16:19:11,214 INFO L226 Difference]: Without dead ends: 3219 [2022-03-15 16:19:11,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2063 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1631, Invalid=4689, Unknown=0, NotChecked=0, Total=6320 [2022-03-15 16:19:11,215 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 447 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 1050 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 1250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 1050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:19:11,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [447 Valid, 165 Invalid, 1250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 1050 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:19:11,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3219 states. [2022-03-15 16:19:11,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3219 to 1442. [2022-03-15 16:19:11,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 2.2873004857737684) internal successors, (3296), 1441 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:11,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 3296 transitions. [2022-03-15 16:19:11,243 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 3296 transitions. Word has length 31 [2022-03-15 16:19:11,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:19:11,243 INFO L470 AbstractCegarLoop]: Abstraction has 1442 states and 3296 transitions. [2022-03-15 16:19:11,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 31 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:11,244 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 3296 transitions. [2022-03-15 16:19:11,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:19:11,245 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:19:11,245 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:19:11,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-15 16:19:11,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:11,451 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:19:11,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:19:11,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1802444585, now seen corresponding path program 19 times [2022-03-15 16:19:11,452 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:19:11,452 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628962919] [2022-03-15 16:19:11,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:19:11,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:19:11,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:19:11,538 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:11,538 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:19:11,538 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628962919] [2022-03-15 16:19:11,538 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628962919] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:19:11,539 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666602256] [2022-03-15 16:19:11,539 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:19:11,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:11,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:19:11,540 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:19:11,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-15 16:19:11,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:19:11,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 16:19:11,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:19:11,849 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:11,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:19:12,166 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:12,166 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666602256] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:19:12,166 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:19:12,166 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 14] total 32 [2022-03-15 16:19:12,167 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029058771] [2022-03-15 16:19:12,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:19:12,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-15 16:19:12,167 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:19:12,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-15 16:19:12,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=805, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 16:19:12,167 INFO L87 Difference]: Start difference. First operand 1442 states and 3296 transitions. Second operand has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:13,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:19:13,183 INFO L93 Difference]: Finished difference Result 2321 states and 5141 transitions. [2022-03-15 16:19:13,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-15 16:19:13,183 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 16:19:13,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:19:13,190 INFO L225 Difference]: With dead ends: 2321 [2022-03-15 16:19:13,190 INFO L226 Difference]: Without dead ends: 2313 [2022-03-15 16:19:13,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1957 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1719, Invalid=4761, Unknown=0, NotChecked=0, Total=6480 [2022-03-15 16:19:13,191 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 388 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:19:13,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [388 Valid, 126 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:19:13,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2313 states. [2022-03-15 16:19:13,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2313 to 1166. [2022-03-15 16:19:13,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1166 states, 1165 states have (on average 2.2643776824034334) internal successors, (2638), 1165 states have internal predecessors, (2638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:13,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1166 states to 1166 states and 2638 transitions. [2022-03-15 16:19:13,210 INFO L78 Accepts]: Start accepts. Automaton has 1166 states and 2638 transitions. Word has length 31 [2022-03-15 16:19:13,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:19:13,210 INFO L470 AbstractCegarLoop]: Abstraction has 1166 states and 2638 transitions. [2022-03-15 16:19:13,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:13,210 INFO L276 IsEmpty]: Start isEmpty. Operand 1166 states and 2638 transitions. [2022-03-15 16:19:13,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 16:19:13,213 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:19:13,213 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:19:13,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-15 16:19:13,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:13,429 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:19:13,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:19:13,429 INFO L85 PathProgramCache]: Analyzing trace with hash 986733015, now seen corresponding path program 20 times [2022-03-15 16:19:13,429 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:19:13,429 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253126471] [2022-03-15 16:19:13,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:19:13,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:19:13,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:19:13,529 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:13,529 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:19:13,529 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253126471] [2022-03-15 16:19:13,529 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253126471] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:19:13,530 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874095492] [2022-03-15 16:19:13,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:19:13,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:13,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:19:13,531 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:19:13,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-15 16:19:13,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:19:13,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:19:13,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 16:19:13,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:19:13,855 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:13,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:19:14,174 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:14,174 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874095492] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:19:14,174 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:19:14,174 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 36 [2022-03-15 16:19:14,175 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696386250] [2022-03-15 16:19:14,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:19:14,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-15 16:19:14,175 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:19:14,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-15 16:19:14,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=1057, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 16:19:14,176 INFO L87 Difference]: Start difference. First operand 1166 states and 2638 transitions. Second operand has 37 states, 37 states have (on average 2.324324324324324) internal successors, (86), 36 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:15,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:19:15,505 INFO L93 Difference]: Finished difference Result 2121 states and 4524 transitions. [2022-03-15 16:19:15,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-15 16:19:15,506 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.324324324324324) internal successors, (86), 36 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-15 16:19:15,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:19:15,511 INFO L225 Difference]: With dead ends: 2121 [2022-03-15 16:19:15,511 INFO L226 Difference]: Without dead ends: 1995 [2022-03-15 16:19:15,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2991 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2447, Invalid=7453, Unknown=0, NotChecked=0, Total=9900 [2022-03-15 16:19:15,513 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 359 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 912 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:19:15,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 174 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 912 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:19:15,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1995 states. [2022-03-15 16:19:15,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1995 to 1115. [2022-03-15 16:19:15,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1115 states, 1114 states have (on average 2.2594254937163374) internal successors, (2517), 1114 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:15,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1115 states to 1115 states and 2517 transitions. [2022-03-15 16:19:15,540 INFO L78 Accepts]: Start accepts. Automaton has 1115 states and 2517 transitions. Word has length 33 [2022-03-15 16:19:15,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:19:15,540 INFO L470 AbstractCegarLoop]: Abstraction has 1115 states and 2517 transitions. [2022-03-15 16:19:15,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.324324324324324) internal successors, (86), 36 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:15,540 INFO L276 IsEmpty]: Start isEmpty. Operand 1115 states and 2517 transitions. [2022-03-15 16:19:15,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 16:19:15,542 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:19:15,542 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:19:15,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-15 16:19:15,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-15 16:19:15,747 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:19:15,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:19:15,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1374694123, now seen corresponding path program 21 times [2022-03-15 16:19:15,748 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:19:15,748 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994494535] [2022-03-15 16:19:15,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:19:15,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:19:15,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:19:15,825 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:15,825 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:19:15,825 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994494535] [2022-03-15 16:19:15,825 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994494535] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:19:15,825 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394564009] [2022-03-15 16:19:15,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:19:15,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:15,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:19:15,826 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:19:15,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-15 16:19:15,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-03-15 16:19:15,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:19:15,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:19:15,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:19:16,161 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:16,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:19:16,473 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:16,473 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394564009] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:19:16,473 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:19:16,473 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15, 14] total 32 [2022-03-15 16:19:16,473 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840006591] [2022-03-15 16:19:16,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:19:16,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-15 16:19:16,474 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:19:16,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-15 16:19:16,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=789, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 16:19:16,474 INFO L87 Difference]: Start difference. First operand 1115 states and 2517 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:17,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:19:17,892 INFO L93 Difference]: Finished difference Result 1545 states and 3349 transitions. [2022-03-15 16:19:17,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-15 16:19:17,892 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-15 16:19:17,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:19:17,902 INFO L225 Difference]: With dead ends: 1545 [2022-03-15 16:19:17,902 INFO L226 Difference]: Without dead ends: 1541 [2022-03-15 16:19:17,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3225 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2764, Invalid=7538, Unknown=0, NotChecked=0, Total=10302 [2022-03-15 16:19:17,910 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 264 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:19:17,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 89 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:19:17,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1541 states. [2022-03-15 16:19:17,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1541 to 1115. [2022-03-15 16:19:17,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1115 states, 1114 states have (on average 2.258527827648115) internal successors, (2516), 1114 states have internal predecessors, (2516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:17,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1115 states to 1115 states and 2516 transitions. [2022-03-15 16:19:17,926 INFO L78 Accepts]: Start accepts. Automaton has 1115 states and 2516 transitions. Word has length 33 [2022-03-15 16:19:17,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:19:17,926 INFO L470 AbstractCegarLoop]: Abstraction has 1115 states and 2516 transitions. [2022-03-15 16:19:17,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:17,926 INFO L276 IsEmpty]: Start isEmpty. Operand 1115 states and 2516 transitions. [2022-03-15 16:19:17,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 16:19:17,928 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:19:17,928 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:19:17,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-15 16:19:18,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-03-15 16:19:18,145 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:19:18,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:19:18,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1860569387, now seen corresponding path program 22 times [2022-03-15 16:19:18,146 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:19:18,146 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611225654] [2022-03-15 16:19:18,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:19:18,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:19:18,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:19:18,212 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:18,213 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:19:18,213 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611225654] [2022-03-15 16:19:18,213 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611225654] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:19:18,213 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040920606] [2022-03-15 16:19:18,213 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:19:18,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:18,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:19:18,214 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:19:18,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-15 16:19:18,235 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:19:18,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:19:18,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 16:19:18,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:19:18,324 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:18,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:19:18,513 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:18,513 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040920606] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:19:18,513 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:19:18,513 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 13] total 18 [2022-03-15 16:19:18,513 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409076666] [2022-03-15 16:19:18,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:19:18,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 16:19:18,513 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:19:18,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 16:19:18,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2022-03-15 16:19:18,514 INFO L87 Difference]: Start difference. First operand 1115 states and 2516 transitions. Second operand has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:18,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:19:18,609 INFO L93 Difference]: Finished difference Result 1715 states and 3869 transitions. [2022-03-15 16:19:18,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 16:19:18,610 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-15 16:19:18,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:19:18,613 INFO L225 Difference]: With dead ends: 1715 [2022-03-15 16:19:18,613 INFO L226 Difference]: Without dead ends: 1670 [2022-03-15 16:19:18,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 61 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2022-03-15 16:19:18,616 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 129 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:19:18,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 349 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:19:18,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1670 states. [2022-03-15 16:19:18,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1670 to 1471. [2022-03-15 16:19:18,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1471 states, 1470 states have (on average 2.314965986394558) internal successors, (3403), 1470 states have internal predecessors, (3403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:18,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1471 states to 1471 states and 3403 transitions. [2022-03-15 16:19:18,646 INFO L78 Accepts]: Start accepts. Automaton has 1471 states and 3403 transitions. Word has length 35 [2022-03-15 16:19:18,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:19:18,646 INFO L470 AbstractCegarLoop]: Abstraction has 1471 states and 3403 transitions. [2022-03-15 16:19:18,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:18,647 INFO L276 IsEmpty]: Start isEmpty. Operand 1471 states and 3403 transitions. [2022-03-15 16:19:18,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 16:19:18,649 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:19:18,649 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:19:18,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-15 16:19:18,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:18,863 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:19:18,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:19:18,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1814617945, now seen corresponding path program 23 times [2022-03-15 16:19:18,864 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:19:18,864 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080227963] [2022-03-15 16:19:18,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:19:18,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:19:18,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:19:19,063 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:19,063 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:19:19,063 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080227963] [2022-03-15 16:19:19,063 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080227963] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:19:19,063 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383527414] [2022-03-15 16:19:19,063 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:19:19,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:19,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:19:19,065 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:19:19,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-15 16:19:19,087 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-15 16:19:19,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:19:19,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 16:19:19,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:19:19,447 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:19,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:19:20,585 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:20,586 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383527414] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:19:20,586 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:19:20,586 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-03-15 16:19:20,586 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261653626] [2022-03-15 16:19:20,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:19:20,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-15 16:19:20,586 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:19:20,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-15 16:19:20,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=1371, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 16:19:20,587 INFO L87 Difference]: Start difference. First operand 1471 states and 3403 transitions. Second operand has 41 states, 41 states have (on average 2.2195121951219514) internal successors, (91), 40 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:27,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:19:27,793 INFO L93 Difference]: Finished difference Result 3304 states and 7063 transitions. [2022-03-15 16:19:27,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-03-15 16:19:27,794 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.2195121951219514) internal successors, (91), 40 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-15 16:19:27,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:19:27,799 INFO L225 Difference]: With dead ends: 3304 [2022-03-15 16:19:27,799 INFO L226 Difference]: Without dead ends: 3031 [2022-03-15 16:19:27,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5150 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=3270, Invalid=11736, Unknown=0, NotChecked=0, Total=15006 [2022-03-15 16:19:27,800 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 669 mSDsluCounter, 768 mSDsCounter, 0 mSdLazyCounter, 1671 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 669 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 1958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 1671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:19:27,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [669 Valid, 435 Invalid, 1958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 1671 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 16:19:27,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3031 states. [2022-03-15 16:19:27,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3031 to 1747. [2022-03-15 16:19:27,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1747 states, 1746 states have (on average 2.2262313860252005) internal successors, (3887), 1746 states have internal predecessors, (3887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:27,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1747 states to 1747 states and 3887 transitions. [2022-03-15 16:19:27,830 INFO L78 Accepts]: Start accepts. Automaton has 1747 states and 3887 transitions. Word has length 35 [2022-03-15 16:19:27,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:19:27,830 INFO L470 AbstractCegarLoop]: Abstraction has 1747 states and 3887 transitions. [2022-03-15 16:19:27,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.2195121951219514) internal successors, (91), 40 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:27,831 INFO L276 IsEmpty]: Start isEmpty. Operand 1747 states and 3887 transitions. [2022-03-15 16:19:27,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 16:19:27,833 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:19:27,833 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:19:27,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-15 16:19:28,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:28,054 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:19:28,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:19:28,054 INFO L85 PathProgramCache]: Analyzing trace with hash 175034965, now seen corresponding path program 24 times [2022-03-15 16:19:28,054 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:19:28,054 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352908445] [2022-03-15 16:19:28,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:19:28,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:19:28,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:19:28,212 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:28,213 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:19:28,213 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352908445] [2022-03-15 16:19:28,213 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352908445] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:19:28,213 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700040940] [2022-03-15 16:19:28,213 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:19:28,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:28,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:19:28,214 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:19:28,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-15 16:19:28,237 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-15 16:19:28,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:19:28,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 16:19:28,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:19:28,600 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:28,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:19:29,479 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 13 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:29,479 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700040940] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:19:29,479 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:19:29,479 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 16] total 38 [2022-03-15 16:19:29,479 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942657349] [2022-03-15 16:19:29,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:19:29,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-15 16:19:29,479 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:19:29,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-15 16:19:29,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=1143, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 16:19:29,480 INFO L87 Difference]: Start difference. First operand 1747 states and 3887 transitions. Second operand has 39 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 38 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:32,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:19:32,450 INFO L93 Difference]: Finished difference Result 4310 states and 9592 transitions. [2022-03-15 16:19:32,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-15 16:19:32,451 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 38 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-15 16:19:32,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:19:32,458 INFO L225 Difference]: With dead ends: 4310 [2022-03-15 16:19:32,458 INFO L226 Difference]: Without dead ends: 4302 [2022-03-15 16:19:32,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3782 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2695, Invalid=8225, Unknown=0, NotChecked=0, Total=10920 [2022-03-15 16:19:32,459 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 593 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 1471 mSolverCounterSat, 349 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 593 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 1820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 349 IncrementalHoareTripleChecker+Valid, 1471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:19:32,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [593 Valid, 173 Invalid, 1820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [349 Valid, 1471 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 16:19:32,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4302 states. [2022-03-15 16:19:32,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4302 to 2269. [2022-03-15 16:19:32,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2269 states, 2268 states have (on average 2.2755731922398588) internal successors, (5161), 2268 states have internal predecessors, (5161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:32,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2269 states to 2269 states and 5161 transitions. [2022-03-15 16:19:32,495 INFO L78 Accepts]: Start accepts. Automaton has 2269 states and 5161 transitions. Word has length 35 [2022-03-15 16:19:32,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:19:32,495 INFO L470 AbstractCegarLoop]: Abstraction has 2269 states and 5161 transitions. [2022-03-15 16:19:32,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 38 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:32,495 INFO L276 IsEmpty]: Start isEmpty. Operand 2269 states and 5161 transitions. [2022-03-15 16:19:32,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 16:19:32,497 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:19:32,497 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:19:32,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-15 16:19:32,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-15 16:19:32,711 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:19:32,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:19:32,712 INFO L85 PathProgramCache]: Analyzing trace with hash 674574509, now seen corresponding path program 25 times [2022-03-15 16:19:32,712 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:19:32,712 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459400511] [2022-03-15 16:19:32,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:19:32,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:19:32,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:19:32,806 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:32,806 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:19:32,806 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459400511] [2022-03-15 16:19:32,806 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459400511] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:19:32,806 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870721552] [2022-03-15 16:19:32,806 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:19:32,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:32,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:19:32,808 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:19:32,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-15 16:19:32,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:19:32,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 16:19:32,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:19:33,235 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:33,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:19:33,601 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 22 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:33,601 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870721552] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:19:33,601 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:19:33,601 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16, 16] total 37 [2022-03-15 16:19:33,601 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896748600] [2022-03-15 16:19:33,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:19:33,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-15 16:19:33,602 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:19:33,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-15 16:19:33,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=1078, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 16:19:33,603 INFO L87 Difference]: Start difference. First operand 2269 states and 5161 transitions. Second operand has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 37 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:35,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:19:35,216 INFO L93 Difference]: Finished difference Result 4342 states and 9549 transitions. [2022-03-15 16:19:35,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-15 16:19:35,216 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 37 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-15 16:19:35,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:19:35,223 INFO L225 Difference]: With dead ends: 4342 [2022-03-15 16:19:35,223 INFO L226 Difference]: Without dead ends: 4334 [2022-03-15 16:19:35,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3769 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3075, Invalid=8697, Unknown=0, NotChecked=0, Total=11772 [2022-03-15 16:19:35,224 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 471 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 1035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:19:35,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [471 Valid, 209 Invalid, 1035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:19:35,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4334 states. [2022-03-15 16:19:35,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4334 to 2100. [2022-03-15 16:19:35,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2100 states, 2099 states have (on average 2.2725107193901857) internal successors, (4770), 2099 states have internal predecessors, (4770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:35,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2100 states to 2100 states and 4770 transitions. [2022-03-15 16:19:35,257 INFO L78 Accepts]: Start accepts. Automaton has 2100 states and 4770 transitions. Word has length 35 [2022-03-15 16:19:35,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:19:35,258 INFO L470 AbstractCegarLoop]: Abstraction has 2100 states and 4770 transitions. [2022-03-15 16:19:35,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 37 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:35,258 INFO L276 IsEmpty]: Start isEmpty. Operand 2100 states and 4770 transitions. [2022-03-15 16:19:35,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-15 16:19:35,260 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:19:35,260 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:19:35,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-15 16:19:35,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-15 16:19:35,476 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:19:35,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:19:35,477 INFO L85 PathProgramCache]: Analyzing trace with hash 326959379, now seen corresponding path program 26 times [2022-03-15 16:19:35,477 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:19:35,477 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367149467] [2022-03-15 16:19:35,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:19:35,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:19:35,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:19:35,596 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:35,597 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:19:35,597 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367149467] [2022-03-15 16:19:35,597 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367149467] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:19:35,597 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839250509] [2022-03-15 16:19:35,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:19:35,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:35,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:19:35,598 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:19:35,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-15 16:19:35,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:19:35,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:19:35,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 16:19:35,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:19:35,968 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:35,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:19:36,388 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 30 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:36,389 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839250509] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:19:36,389 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:19:36,389 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 16] total 42 [2022-03-15 16:19:36,389 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233362541] [2022-03-15 16:19:36,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:19:36,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 16:19:36,389 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:19:36,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 16:19:36,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=1443, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 16:19:36,390 INFO L87 Difference]: Start difference. First operand 2100 states and 4770 transitions. Second operand has 43 states, 43 states have (on average 2.2790697674418605) internal successors, (98), 42 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:38,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:19:38,337 INFO L93 Difference]: Finished difference Result 3300 states and 7116 transitions. [2022-03-15 16:19:38,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-03-15 16:19:38,337 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.2790697674418605) internal successors, (98), 42 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-15 16:19:38,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:19:38,342 INFO L225 Difference]: With dead ends: 3300 [2022-03-15 16:19:38,342 INFO L226 Difference]: Without dead ends: 3111 [2022-03-15 16:19:38,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5089 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3920, Invalid=12082, Unknown=0, NotChecked=0, Total=16002 [2022-03-15 16:19:38,344 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 478 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 1246 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 1339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:19:38,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [478 Valid, 225 Invalid, 1339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1246 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 16:19:38,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3111 states. [2022-03-15 16:19:38,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3111 to 2017. [2022-03-15 16:19:38,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2017 states, 2016 states have (on average 2.275297619047619) internal successors, (4587), 2016 states have internal predecessors, (4587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:38,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2017 states to 2017 states and 4587 transitions. [2022-03-15 16:19:38,370 INFO L78 Accepts]: Start accepts. Automaton has 2017 states and 4587 transitions. Word has length 37 [2022-03-15 16:19:38,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:19:38,370 INFO L470 AbstractCegarLoop]: Abstraction has 2017 states and 4587 transitions. [2022-03-15 16:19:38,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.2790697674418605) internal successors, (98), 42 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:38,371 INFO L276 IsEmpty]: Start isEmpty. Operand 2017 states and 4587 transitions. [2022-03-15 16:19:38,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-15 16:19:38,373 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:19:38,373 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:19:38,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-15 16:19:38,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-15 16:19:38,588 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:19:38,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:19:38,588 INFO L85 PathProgramCache]: Analyzing trace with hash -177098347, now seen corresponding path program 27 times [2022-03-15 16:19:38,588 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:19:38,588 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867994399] [2022-03-15 16:19:38,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:19:38,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:19:38,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:19:38,677 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:38,677 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:19:38,677 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867994399] [2022-03-15 16:19:38,677 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867994399] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:19:38,677 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964561984] [2022-03-15 16:19:38,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:19:38,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:38,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:19:38,679 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:19:38,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-15 16:19:38,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-03-15 16:19:38,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:19:38,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:19:38,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:19:39,072 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:39,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:19:39,457 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:39,457 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964561984] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:19:39,457 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:19:39,458 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 17, 16] total 37 [2022-03-15 16:19:39,458 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46821317] [2022-03-15 16:19:39,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:19:39,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-15 16:19:39,458 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:19:39,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-15 16:19:39,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=1057, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 16:19:39,458 INFO L87 Difference]: Start difference. First operand 2017 states and 4587 transitions. Second operand has 38 states, 38 states have (on average 2.3684210526315788) internal successors, (90), 37 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:41,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:19:41,670 INFO L93 Difference]: Finished difference Result 2617 states and 5755 transitions. [2022-03-15 16:19:41,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-03-15 16:19:41,671 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.3684210526315788) internal successors, (90), 37 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-15 16:19:41,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:19:41,674 INFO L225 Difference]: With dead ends: 2617 [2022-03-15 16:19:41,674 INFO L226 Difference]: Without dead ends: 2613 [2022-03-15 16:19:41,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5796 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=4528, Invalid=12764, Unknown=0, NotChecked=0, Total=17292 [2022-03-15 16:19:41,675 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 394 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 1027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:19:41,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [394 Valid, 128 Invalid, 1027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 921 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:19:41,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2613 states. [2022-03-15 16:19:41,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2613 to 2017. [2022-03-15 16:19:41,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2017 states, 2016 states have (on average 2.2748015873015874) internal successors, (4586), 2016 states have internal predecessors, (4586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:41,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2017 states to 2017 states and 4586 transitions. [2022-03-15 16:19:41,699 INFO L78 Accepts]: Start accepts. Automaton has 2017 states and 4586 transitions. Word has length 37 [2022-03-15 16:19:41,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:19:41,699 INFO L470 AbstractCegarLoop]: Abstraction has 2017 states and 4586 transitions. [2022-03-15 16:19:41,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.3684210526315788) internal successors, (90), 37 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:41,699 INFO L276 IsEmpty]: Start isEmpty. Operand 2017 states and 4586 transitions. [2022-03-15 16:19:41,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-15 16:19:41,701 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:19:41,701 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:19:41,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-15 16:19:41,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-15 16:19:41,902 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:19:41,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:19:41,902 INFO L85 PathProgramCache]: Analyzing trace with hash -35070279, now seen corresponding path program 28 times [2022-03-15 16:19:41,902 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:19:41,902 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980697914] [2022-03-15 16:19:41,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:19:41,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:19:41,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:19:41,995 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:19:41,995 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:19:41,996 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980697914] [2022-03-15 16:19:41,996 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980697914] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:19:41,996 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922543923] [2022-03-15 16:19:41,996 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:19:41,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:41,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:19:41,997 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:19:41,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-15 16:19:42,018 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:19:42,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:19:42,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 16:19:42,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:19:42,319 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 20 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:19:42,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:19:42,952 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 30 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:42,952 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922543923] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:19:42,952 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:19:42,952 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 17] total 41 [2022-03-15 16:19:42,952 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430005949] [2022-03-15 16:19:42,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:19:42,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-15 16:19:42,953 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:19:42,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-15 16:19:42,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=432, Invalid=1290, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 16:19:42,953 INFO L87 Difference]: Start difference. First operand 2017 states and 4586 transitions. Second operand has 42 states, 42 states have (on average 2.3333333333333335) internal successors, (98), 41 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:45,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:19:45,711 INFO L93 Difference]: Finished difference Result 6297 states and 13794 transitions. [2022-03-15 16:19:45,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-03-15 16:19:45,711 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.3333333333333335) internal successors, (98), 41 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-15 16:19:45,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:19:45,718 INFO L225 Difference]: With dead ends: 6297 [2022-03-15 16:19:45,718 INFO L226 Difference]: Without dead ends: 6192 [2022-03-15 16:19:45,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8663 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=5776, Invalid=13964, Unknown=0, NotChecked=0, Total=19740 [2022-03-15 16:19:45,720 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 755 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 1276 mSolverCounterSat, 250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 755 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 1526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 1276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:19:45,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [755 Valid, 321 Invalid, 1526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 1276 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 16:19:45,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6192 states. [2022-03-15 16:19:45,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6192 to 3061. [2022-03-15 16:19:45,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3061 states, 3060 states have (on average 2.2669934640522875) internal successors, (6937), 3060 states have internal predecessors, (6937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:45,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3061 states to 3061 states and 6937 transitions. [2022-03-15 16:19:45,778 INFO L78 Accepts]: Start accepts. Automaton has 3061 states and 6937 transitions. Word has length 37 [2022-03-15 16:19:45,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:19:45,779 INFO L470 AbstractCegarLoop]: Abstraction has 3061 states and 6937 transitions. [2022-03-15 16:19:45,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.3333333333333335) internal successors, (98), 41 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:45,779 INFO L276 IsEmpty]: Start isEmpty. Operand 3061 states and 6937 transitions. [2022-03-15 16:19:45,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-15 16:19:45,781 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:19:45,781 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:19:45,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-15 16:19:45,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:45,988 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:19:45,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:19:45,988 INFO L85 PathProgramCache]: Analyzing trace with hash -148555911, now seen corresponding path program 29 times [2022-03-15 16:19:45,988 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:19:45,988 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851874458] [2022-03-15 16:19:45,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:19:45,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:19:45,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:19:46,175 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:46,175 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:19:46,175 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851874458] [2022-03-15 16:19:46,175 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851874458] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:19:46,175 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475261706] [2022-03-15 16:19:46,175 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:19:46,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:46,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:19:46,176 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:19:46,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-15 16:19:46,199 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-15 16:19:46,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:19:46,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:19:46,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:19:46,559 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:46,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:19:47,014 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:47,014 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475261706] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:19:47,014 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:19:47,014 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 47 [2022-03-15 16:19:47,015 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276342792] [2022-03-15 16:19:47,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:19:47,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-15 16:19:47,015 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:19:47,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-15 16:19:47,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=1814, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 16:19:47,016 INFO L87 Difference]: Start difference. First operand 3061 states and 6937 transitions. Second operand has 48 states, 48 states have (on average 2.125) internal successors, (102), 47 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:49,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:19:49,886 INFO L93 Difference]: Finished difference Result 7660 states and 16591 transitions. [2022-03-15 16:19:49,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-03-15 16:19:49,887 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.125) internal successors, (102), 47 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-15 16:19:49,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:19:49,895 INFO L225 Difference]: With dead ends: 7660 [2022-03-15 16:19:49,895 INFO L226 Difference]: Without dead ends: 7474 [2022-03-15 16:19:49,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10600 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=6820, Invalid=18940, Unknown=0, NotChecked=0, Total=25760 [2022-03-15 16:19:49,897 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 798 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 1200 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 798 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 1376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 1200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:19:49,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [798 Valid, 300 Invalid, 1376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 1200 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 16:19:49,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7474 states. [2022-03-15 16:19:49,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7474 to 3144. [2022-03-15 16:19:49,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3144 states, 3143 states have (on average 2.2742602608972318) internal successors, (7148), 3143 states have internal predecessors, (7148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:49,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3144 states to 3144 states and 7148 transitions. [2022-03-15 16:19:49,955 INFO L78 Accepts]: Start accepts. Automaton has 3144 states and 7148 transitions. Word has length 37 [2022-03-15 16:19:49,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:19:49,955 INFO L470 AbstractCegarLoop]: Abstraction has 3144 states and 7148 transitions. [2022-03-15 16:19:49,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.125) internal successors, (102), 47 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:49,955 INFO L276 IsEmpty]: Start isEmpty. Operand 3144 states and 7148 transitions. [2022-03-15 16:19:49,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-15 16:19:49,958 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:19:49,958 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:19:49,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-15 16:19:50,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:50,171 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:19:50,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:19:50,172 INFO L85 PathProgramCache]: Analyzing trace with hash -247873775, now seen corresponding path program 30 times [2022-03-15 16:19:50,172 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:19:50,172 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271582272] [2022-03-15 16:19:50,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:19:50,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:19:50,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:19:50,263 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:50,263 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:19:50,263 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271582272] [2022-03-15 16:19:50,263 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271582272] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:19:50,263 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817202530] [2022-03-15 16:19:50,263 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:19:50,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:50,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:19:50,264 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:19:50,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-15 16:19:50,288 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-15 16:19:50,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:19:50,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 16:19:50,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:19:50,455 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:50,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:19:50,671 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:50,671 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817202530] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:19:50,671 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:19:50,672 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 21 [2022-03-15 16:19:50,672 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453171174] [2022-03-15 16:19:50,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:19:50,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:19:50,672 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:19:50,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:19:50,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:19:50,672 INFO L87 Difference]: Start difference. First operand 3144 states and 7148 transitions. Second operand has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:50,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:19:50,979 INFO L93 Difference]: Finished difference Result 5118 states and 11762 transitions. [2022-03-15 16:19:50,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 16:19:50,979 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-15 16:19:50,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:19:50,985 INFO L225 Difference]: With dead ends: 5118 [2022-03-15 16:19:50,985 INFO L226 Difference]: Without dead ends: 5048 [2022-03-15 16:19:50,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 68 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=195, Invalid=617, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:19:50,986 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 198 mSDsluCounter, 817 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:19:50,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 644 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 635 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:19:50,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5048 states. [2022-03-15 16:19:51,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5048 to 3958. [2022-03-15 16:19:51,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3958 states, 3957 states have (on average 2.3040181956027292) internal successors, (9117), 3957 states have internal predecessors, (9117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:51,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3958 states to 3958 states and 9117 transitions. [2022-03-15 16:19:51,047 INFO L78 Accepts]: Start accepts. Automaton has 3958 states and 9117 transitions. Word has length 39 [2022-03-15 16:19:51,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:19:51,047 INFO L470 AbstractCegarLoop]: Abstraction has 3958 states and 9117 transitions. [2022-03-15 16:19:51,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:51,047 INFO L276 IsEmpty]: Start isEmpty. Operand 3958 states and 9117 transitions. [2022-03-15 16:19:51,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-15 16:19:51,050 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:19:51,051 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:19:51,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-15 16:19:51,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-03-15 16:19:51,266 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:19:51,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:19:51,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1725109521, now seen corresponding path program 31 times [2022-03-15 16:19:51,267 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:19:51,267 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014612556] [2022-03-15 16:19:51,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:19:51,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:19:51,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:19:51,410 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:51,410 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:19:51,410 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014612556] [2022-03-15 16:19:51,410 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014612556] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:19:51,410 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056620704] [2022-03-15 16:19:51,410 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:19:51,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:51,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:19:51,412 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:19:51,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-15 16:19:51,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:19:51,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:19:51,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:19:51,845 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:51,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:19:53,072 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 16 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:53,072 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056620704] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:19:53,072 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:19:53,072 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18, 18] total 43 [2022-03-15 16:19:53,072 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507730355] [2022-03-15 16:19:53,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:19:53,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-15 16:19:53,072 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:19:53,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-15 16:19:53,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=433, Invalid=1459, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 16:19:53,073 INFO L87 Difference]: Start difference. First operand 3958 states and 9117 transitions. Second operand has 44 states, 44 states have (on average 2.2045454545454546) internal successors, (97), 43 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:57,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:19:57,251 INFO L93 Difference]: Finished difference Result 7185 states and 16496 transitions. [2022-03-15 16:19:57,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-03-15 16:19:57,252 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.2045454545454546) internal successors, (97), 43 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-15 16:19:57,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:19:57,261 INFO L225 Difference]: With dead ends: 7185 [2022-03-15 16:19:57,261 INFO L226 Difference]: Without dead ends: 7179 [2022-03-15 16:19:57,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5139 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3544, Invalid=10976, Unknown=0, NotChecked=0, Total=14520 [2022-03-15 16:19:57,263 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 773 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 1975 mSolverCounterSat, 448 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 773 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 2423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 448 IncrementalHoareTripleChecker+Valid, 1975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:19:57,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [773 Valid, 230 Invalid, 2423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [448 Valid, 1975 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 16:19:57,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7179 states. [2022-03-15 16:19:57,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7179 to 4213. [2022-03-15 16:19:57,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4213 states, 4212 states have (on average 2.3409306742640075) internal successors, (9860), 4212 states have internal predecessors, (9860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:57,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4213 states to 4213 states and 9860 transitions. [2022-03-15 16:19:57,347 INFO L78 Accepts]: Start accepts. Automaton has 4213 states and 9860 transitions. Word has length 39 [2022-03-15 16:19:57,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:19:57,347 INFO L470 AbstractCegarLoop]: Abstraction has 4213 states and 9860 transitions. [2022-03-15 16:19:57,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.2045454545454546) internal successors, (97), 43 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:57,347 INFO L276 IsEmpty]: Start isEmpty. Operand 4213 states and 9860 transitions. [2022-03-15 16:19:57,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-15 16:19:57,351 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:19:57,351 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:19:57,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-15 16:19:57,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:57,559 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:19:57,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:19:57,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1853554639, now seen corresponding path program 32 times [2022-03-15 16:19:57,560 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:19:57,560 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357377871] [2022-03-15 16:19:57,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:19:57,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:19:57,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:19:57,670 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 27 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:57,670 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:19:57,670 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357377871] [2022-03-15 16:19:57,670 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357377871] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:19:57,670 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612678250] [2022-03-15 16:19:57,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:19:57,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:57,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:19:57,671 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:19:57,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-15 16:19:57,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:19:57,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:19:57,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 16:19:57,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:19:58,142 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 27 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:58,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:19:58,569 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 32 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:58,569 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612678250] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:19:58,569 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:19:58,569 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18, 18] total 42 [2022-03-15 16:19:58,570 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993803511] [2022-03-15 16:19:58,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:19:58,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 16:19:58,570 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:19:58,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 16:19:58,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=1391, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 16:19:58,571 INFO L87 Difference]: Start difference. First operand 4213 states and 9860 transitions. Second operand has 43 states, 43 states have (on average 2.255813953488372) internal successors, (97), 42 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:00,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:20:00,788 INFO L93 Difference]: Finished difference Result 5916 states and 13505 transitions. [2022-03-15 16:20:00,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-03-15 16:20:00,788 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.255813953488372) internal successors, (97), 42 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-15 16:20:00,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:20:00,794 INFO L225 Difference]: With dead ends: 5916 [2022-03-15 16:20:00,795 INFO L226 Difference]: Without dead ends: 5912 [2022-03-15 16:20:00,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6354 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=4949, Invalid=13957, Unknown=0, NotChecked=0, Total=18906 [2022-03-15 16:20:00,796 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 416 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 947 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 1108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:20:00,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [416 Valid, 123 Invalid, 1108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 947 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:20:00,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5912 states. [2022-03-15 16:20:00,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5912 to 3527. [2022-03-15 16:20:00,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3527 states, 3526 states have (on average 2.356211003970505) internal successors, (8308), 3526 states have internal predecessors, (8308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:00,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3527 states to 3527 states and 8308 transitions. [2022-03-15 16:20:00,839 INFO L78 Accepts]: Start accepts. Automaton has 3527 states and 8308 transitions. Word has length 39 [2022-03-15 16:20:00,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:20:00,840 INFO L470 AbstractCegarLoop]: Abstraction has 3527 states and 8308 transitions. [2022-03-15 16:20:00,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.255813953488372) internal successors, (97), 42 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:00,840 INFO L276 IsEmpty]: Start isEmpty. Operand 3527 states and 8308 transitions. [2022-03-15 16:20:00,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-15 16:20:00,843 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:20:00,843 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:20:00,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-15 16:20:01,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:20:01,052 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:20:01,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:20:01,052 INFO L85 PathProgramCache]: Analyzing trace with hash 725410591, now seen corresponding path program 33 times [2022-03-15 16:20:01,052 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:20:01,052 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067522955] [2022-03-15 16:20:01,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:20:01,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:20:01,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:20:01,193 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 34 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:20:01,193 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:20:01,193 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067522955] [2022-03-15 16:20:01,193 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067522955] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:20:01,193 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158637315] [2022-03-15 16:20:01,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:20:01,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:20:01,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:20:01,194 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:20:01,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-15 16:20:01,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-03-15 16:20:01,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:20:01,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:20:01,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:20:01,709 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:01,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:20:02,256 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:02,256 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158637315] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:20:02,256 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:20:02,256 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 20] total 49 [2022-03-15 16:20:02,256 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470276592] [2022-03-15 16:20:02,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:20:02,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-15 16:20:02,257 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:20:02,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-15 16:20:02,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=2064, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 16:20:02,257 INFO L87 Difference]: Start difference. First operand 3527 states and 8308 transitions. Second operand has 50 states, 50 states have (on average 2.28) internal successors, (114), 49 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:09,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:20:09,228 INFO L93 Difference]: Finished difference Result 8303 states and 17604 transitions. [2022-03-15 16:20:09,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 228 states. [2022-03-15 16:20:09,229 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.28) internal successors, (114), 49 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-03-15 16:20:09,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:20:09,238 INFO L225 Difference]: With dead ends: 8303 [2022-03-15 16:20:09,238 INFO L226 Difference]: Without dead ends: 7946 [2022-03-15 16:20:09,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 272 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30616 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=18238, Invalid=56564, Unknown=0, NotChecked=0, Total=74802 [2022-03-15 16:20:09,241 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1008 mSDsluCounter, 837 mSDsCounter, 0 mSdLazyCounter, 2087 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1008 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 2363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 2087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:20:09,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1008 Valid, 424 Invalid, 2363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 2087 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-15 16:20:09,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7946 states. [2022-03-15 16:20:09,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7946 to 3824. [2022-03-15 16:20:09,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3824 states, 3823 states have (on average 2.3481558985090243) internal successors, (8977), 3823 states have internal predecessors, (8977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:09,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3824 states to 3824 states and 8977 transitions. [2022-03-15 16:20:09,314 INFO L78 Accepts]: Start accepts. Automaton has 3824 states and 8977 transitions. Word has length 41 [2022-03-15 16:20:09,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:20:09,314 INFO L470 AbstractCegarLoop]: Abstraction has 3824 states and 8977 transitions. [2022-03-15 16:20:09,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.28) internal successors, (114), 49 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:09,314 INFO L276 IsEmpty]: Start isEmpty. Operand 3824 states and 8977 transitions. [2022-03-15 16:20:09,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-15 16:20:09,317 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:20:09,317 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:20:09,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-15 16:20:09,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-15 16:20:09,517 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:20:09,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:20:09,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1834803435, now seen corresponding path program 34 times [2022-03-15 16:20:09,518 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:20:09,518 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037703610] [2022-03-15 16:20:09,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:20:09,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:20:09,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:20:09,609 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:09,609 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:20:09,609 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037703610] [2022-03-15 16:20:09,609 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037703610] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:20:09,609 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034384676] [2022-03-15 16:20:09,609 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:20:09,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:20:09,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:20:09,611 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:20:09,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-15 16:20:09,632 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:20:09,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:20:09,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 16:20:09,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:20:10,020 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:10,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:20:10,483 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:10,483 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034384676] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:20:10,483 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:20:10,483 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 18, 17] total 40 [2022-03-15 16:20:10,483 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999777714] [2022-03-15 16:20:10,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:20:10,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-15 16:20:10,483 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:20:10,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-15 16:20:10,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=1230, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 16:20:10,484 INFO L87 Difference]: Start difference. First operand 3824 states and 8977 transitions. Second operand has 41 states, 41 states have (on average 2.4878048780487805) internal successors, (102), 40 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:12,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:20:12,276 INFO L93 Difference]: Finished difference Result 5731 states and 13056 transitions. [2022-03-15 16:20:12,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-03-15 16:20:12,277 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.4878048780487805) internal successors, (102), 40 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-03-15 16:20:12,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:20:12,283 INFO L225 Difference]: With dead ends: 5731 [2022-03-15 16:20:12,283 INFO L226 Difference]: Without dead ends: 5727 [2022-03-15 16:20:12,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4451 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3813, Invalid=10467, Unknown=0, NotChecked=0, Total=14280 [2022-03-15 16:20:12,285 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 377 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 959 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 1042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:20:12,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 166 Invalid, 1042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 959 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:20:12,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5727 states. [2022-03-15 16:20:12,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5727 to 4625. [2022-03-15 16:20:12,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4625 states, 4624 states have (on average 2.343425605536332) internal successors, (10836), 4624 states have internal predecessors, (10836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:12,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4625 states to 4625 states and 10836 transitions. [2022-03-15 16:20:12,349 INFO L78 Accepts]: Start accepts. Automaton has 4625 states and 10836 transitions. Word has length 41 [2022-03-15 16:20:12,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:20:12,349 INFO L470 AbstractCegarLoop]: Abstraction has 4625 states and 10836 transitions. [2022-03-15 16:20:12,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.4878048780487805) internal successors, (102), 40 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:12,349 INFO L276 IsEmpty]: Start isEmpty. Operand 4625 states and 10836 transitions. [2022-03-15 16:20:12,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-15 16:20:12,354 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:20:12,354 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:20:12,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-15 16:20:12,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-15 16:20:12,569 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:20:12,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:20:12,569 INFO L85 PathProgramCache]: Analyzing trace with hash 217373005, now seen corresponding path program 35 times [2022-03-15 16:20:12,569 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:20:12,569 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456088225] [2022-03-15 16:20:12,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:20:12,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:20:12,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:20:12,685 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 1 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:12,685 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:20:12,685 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456088225] [2022-03-15 16:20:12,685 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456088225] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:20:12,685 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553850856] [2022-03-15 16:20:12,685 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:20:12,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:20:12,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:20:12,686 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:20:12,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-15 16:20:12,714 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-03-15 16:20:12,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:20:12,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 16:20:12,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:20:12,849 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:12,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:20:13,382 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:13,382 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553850856] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:20:13,383 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:20:13,383 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 17] total 24 [2022-03-15 16:20:13,383 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405945501] [2022-03-15 16:20:13,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:20:13,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 16:20:13,383 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:20:13,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 16:20:13,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2022-03-15 16:20:13,383 INFO L87 Difference]: Start difference. First operand 4625 states and 10836 transitions. Second operand has 24 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:13,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:20:13,601 INFO L93 Difference]: Finished difference Result 6487 states and 15374 transitions. [2022-03-15 16:20:13,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 16:20:13,609 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-03-15 16:20:13,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:20:13,618 INFO L225 Difference]: With dead ends: 6487 [2022-03-15 16:20:13,618 INFO L226 Difference]: Without dead ends: 6430 [2022-03-15 16:20:13,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 75 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2022-03-15 16:20:13,618 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 182 mSDsluCounter, 785 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:20:13,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 616 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:20:13,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6430 states. [2022-03-15 16:20:13,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6430 to 6189. [2022-03-15 16:20:13,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6189 states, 6188 states have (on average 2.397382029734971) internal successors, (14835), 6188 states have internal predecessors, (14835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:13,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6189 states to 6189 states and 14835 transitions. [2022-03-15 16:20:13,699 INFO L78 Accepts]: Start accepts. Automaton has 6189 states and 14835 transitions. Word has length 43 [2022-03-15 16:20:13,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:20:13,699 INFO L470 AbstractCegarLoop]: Abstraction has 6189 states and 14835 transitions. [2022-03-15 16:20:13,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:13,699 INFO L276 IsEmpty]: Start isEmpty. Operand 6189 states and 14835 transitions. [2022-03-15 16:20:13,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-15 16:20:13,704 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:20:13,704 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:20:13,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-15 16:20:13,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-15 16:20:13,905 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:20:13,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:20:13,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1423537757, now seen corresponding path program 36 times [2022-03-15 16:20:13,905 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:20:13,905 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94376509] [2022-03-15 16:20:13,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:20:13,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:20:13,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:20:14,081 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:14,082 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:20:14,082 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94376509] [2022-03-15 16:20:14,082 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94376509] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:20:14,082 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917966283] [2022-03-15 16:20:14,082 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:20:14,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:20:14,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:20:14,083 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:20:14,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-15 16:20:14,121 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-15 16:20:14,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:20:14,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-15 16:20:14,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:20:14,623 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:14,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:20:16,395 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 2 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:16,395 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917966283] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:20:16,395 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:20:16,396 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19, 20] total 48 [2022-03-15 16:20:16,396 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138354411] [2022-03-15 16:20:16,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:20:16,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-15 16:20:16,396 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:20:16,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-15 16:20:16,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=469, Invalid=1883, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 16:20:16,396 INFO L87 Difference]: Start difference. First operand 6189 states and 14835 transitions. Second operand has 49 states, 49 states have (on average 2.36734693877551) internal successors, (116), 48 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:26,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:20:26,019 INFO L93 Difference]: Finished difference Result 14113 states and 32350 transitions. [2022-03-15 16:20:26,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-03-15 16:20:26,020 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.36734693877551) internal successors, (116), 48 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-03-15 16:20:26,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:20:26,038 INFO L225 Difference]: With dead ends: 14113 [2022-03-15 16:20:26,038 INFO L226 Difference]: Without dead ends: 14074 [2022-03-15 16:20:26,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12397 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=6675, Invalid=25905, Unknown=0, NotChecked=0, Total=32580 [2022-03-15 16:20:26,039 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 1375 mSDsluCounter, 984 mSDsCounter, 0 mSdLazyCounter, 3756 mSolverCounterSat, 618 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1375 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 4374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 618 IncrementalHoareTripleChecker+Valid, 3756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:20:26,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1375 Valid, 505 Invalid, 4374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [618 Valid, 3756 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-15 16:20:26,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14074 states. [2022-03-15 16:20:26,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14074 to 7107. [2022-03-15 16:20:26,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7107 states, 7106 states have (on average 2.41345341964537) internal successors, (17150), 7106 states have internal predecessors, (17150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:26,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7107 states to 7107 states and 17150 transitions. [2022-03-15 16:20:26,210 INFO L78 Accepts]: Start accepts. Automaton has 7107 states and 17150 transitions. Word has length 43 [2022-03-15 16:20:26,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:20:26,210 INFO L470 AbstractCegarLoop]: Abstraction has 7107 states and 17150 transitions. [2022-03-15 16:20:26,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.36734693877551) internal successors, (116), 48 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:26,211 INFO L276 IsEmpty]: Start isEmpty. Operand 7107 states and 17150 transitions. [2022-03-15 16:20:26,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-15 16:20:26,216 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:20:26,216 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:20:26,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-15 16:20:26,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:20:26,426 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:20:26,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:20:26,426 INFO L85 PathProgramCache]: Analyzing trace with hash 2141063629, now seen corresponding path program 37 times [2022-03-15 16:20:26,426 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:20:26,426 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500232442] [2022-03-15 16:20:26,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:20:26,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:20:26,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:20:26,601 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 13 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:26,601 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:20:26,601 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500232442] [2022-03-15 16:20:26,602 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500232442] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:20:26,602 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502405992] [2022-03-15 16:20:26,602 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:20:26,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:20:26,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:20:26,603 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:20:26,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-15 16:20:26,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:20:26,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-15 16:20:26,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:20:27,107 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 13 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:27,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:20:28,728 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 19 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:28,728 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502405992] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:20:28,728 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:20:28,728 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 20, 20] total 48 [2022-03-15 16:20:28,728 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610774169] [2022-03-15 16:20:28,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:20:28,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-15 16:20:28,729 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:20:28,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-15 16:20:28,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=540, Invalid=1812, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 16:20:28,729 INFO L87 Difference]: Start difference. First operand 7107 states and 17150 transitions. Second operand has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 48 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:35,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:20:35,213 INFO L93 Difference]: Finished difference Result 11263 states and 26738 transitions. [2022-03-15 16:20:35,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-03-15 16:20:35,213 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 48 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-03-15 16:20:35,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:20:35,226 INFO L225 Difference]: With dead ends: 11263 [2022-03-15 16:20:35,226 INFO L226 Difference]: Without dead ends: 11257 [2022-03-15 16:20:35,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7749 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=5198, Invalid=16264, Unknown=0, NotChecked=0, Total=21462 [2022-03-15 16:20:35,227 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 695 mSDsluCounter, 836 mSDsCounter, 0 mSdLazyCounter, 3735 mSolverCounterSat, 423 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 695 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 4158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 423 IncrementalHoareTripleChecker+Valid, 3735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:20:35,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [695 Valid, 418 Invalid, 4158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [423 Valid, 3735 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-15 16:20:35,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11257 states. [2022-03-15 16:20:35,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11257 to 7121. [2022-03-15 16:20:35,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7121 states, 7120 states have (on average 2.3985955056179775) internal successors, (17078), 7120 states have internal predecessors, (17078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:35,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7121 states to 7121 states and 17078 transitions. [2022-03-15 16:20:35,337 INFO L78 Accepts]: Start accepts. Automaton has 7121 states and 17078 transitions. Word has length 43 [2022-03-15 16:20:35,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:20:35,337 INFO L470 AbstractCegarLoop]: Abstraction has 7121 states and 17078 transitions. [2022-03-15 16:20:35,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 48 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:35,337 INFO L276 IsEmpty]: Start isEmpty. Operand 7121 states and 17078 transitions. [2022-03-15 16:20:35,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-15 16:20:35,343 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:20:35,343 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:20:35,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-15 16:20:35,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-15 16:20:35,543 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:20:35,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:20:35,544 INFO L85 PathProgramCache]: Analyzing trace with hash -2112358153, now seen corresponding path program 38 times [2022-03-15 16:20:35,544 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:20:35,544 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590968067] [2022-03-15 16:20:35,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:20:35,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:20:35,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:20:35,764 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 19 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:20:35,764 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:20:35,764 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590968067] [2022-03-15 16:20:35,764 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590968067] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:20:35,764 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465942436] [2022-03-15 16:20:35,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:20:35,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:20:35,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:20:35,765 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:20:35,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-15 16:20:35,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:20:35,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:20:35,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:20:35,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:20:36,344 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 16 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:36,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:20:36,940 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 17 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:36,940 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465942436] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:20:36,940 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:20:36,940 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 20] total 51 [2022-03-15 16:20:36,940 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075409909] [2022-03-15 16:20:36,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:20:36,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-03-15 16:20:36,941 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:20:36,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-03-15 16:20:36,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=420, Invalid=2232, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 16:20:36,941 INFO L87 Difference]: Start difference. First operand 7121 states and 17078 transitions. Second operand has 52 states, 52 states have (on average 2.1923076923076925) internal successors, (114), 51 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:42,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:20:42,314 INFO L93 Difference]: Finished difference Result 23199 states and 51780 transitions. [2022-03-15 16:20:42,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2022-03-15 16:20:42,314 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.1923076923076925) internal successors, (114), 51 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-03-15 16:20:42,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:20:42,381 INFO L225 Difference]: With dead ends: 23199 [2022-03-15 16:20:42,381 INFO L226 Difference]: Without dead ends: 22782 [2022-03-15 16:20:42,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17718 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=10278, Invalid=36594, Unknown=0, NotChecked=0, Total=46872 [2022-03-15 16:20:42,383 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 870 mSDsluCounter, 718 mSDsCounter, 0 mSdLazyCounter, 2092 mSolverCounterSat, 281 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 870 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 2373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 281 IncrementalHoareTripleChecker+Valid, 2092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:20:42,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [870 Valid, 337 Invalid, 2373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [281 Valid, 2092 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-15 16:20:42,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22782 states. [2022-03-15 16:20:42,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22782 to 8676. [2022-03-15 16:20:42,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8676 states, 8675 states have (on average 2.400806916426513) internal successors, (20827), 8675 states have internal predecessors, (20827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:42,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8676 states to 8676 states and 20827 transitions. [2022-03-15 16:20:42,557 INFO L78 Accepts]: Start accepts. Automaton has 8676 states and 20827 transitions. Word has length 43 [2022-03-15 16:20:42,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:20:42,557 INFO L470 AbstractCegarLoop]: Abstraction has 8676 states and 20827 transitions. [2022-03-15 16:20:42,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.1923076923076925) internal successors, (114), 51 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:42,557 INFO L276 IsEmpty]: Start isEmpty. Operand 8676 states and 20827 transitions. [2022-03-15 16:20:42,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-15 16:20:42,565 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:20:42,565 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:20:42,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-15 16:20:42,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-15 16:20:42,779 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:20:42,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:20:42,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1531415989, now seen corresponding path program 39 times [2022-03-15 16:20:42,780 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:20:42,780 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799349784] [2022-03-15 16:20:42,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:20:42,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:20:42,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:20:42,924 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 38 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:42,924 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:20:42,924 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799349784] [2022-03-15 16:20:42,924 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799349784] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:20:42,924 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331608765] [2022-03-15 16:20:42,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:20:42,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:20:42,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:20:42,925 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:20:42,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-15 16:20:42,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-03-15 16:20:42,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:20:42,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 16:20:42,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:20:43,464 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 38 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:43,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:20:43,990 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 44 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:43,990 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331608765] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:20:43,990 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:20:43,990 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20, 20] total 47 [2022-03-15 16:20:43,991 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503963148] [2022-03-15 16:20:43,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:20:43,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-15 16:20:43,991 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:20:43,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-15 16:20:43,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=513, Invalid=1743, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 16:20:43,992 INFO L87 Difference]: Start difference. First operand 8676 states and 20827 transitions. Second operand has 48 states, 48 states have (on average 2.2708333333333335) internal successors, (109), 47 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:47,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:20:47,161 INFO L93 Difference]: Finished difference Result 12074 states and 28318 transitions. [2022-03-15 16:20:47,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-03-15 16:20:47,161 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.2708333333333335) internal successors, (109), 47 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-03-15 16:20:47,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:20:47,177 INFO L225 Difference]: With dead ends: 12074 [2022-03-15 16:20:47,177 INFO L226 Difference]: Without dead ends: 12070 [2022-03-15 16:20:47,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10473 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=7559, Invalid=21853, Unknown=0, NotChecked=0, Total=29412 [2022-03-15 16:20:47,179 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 692 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 1190 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 692 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 1389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 1190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:20:47,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [692 Valid, 190 Invalid, 1389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 1190 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 16:20:47,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12070 states. [2022-03-15 16:20:47,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12070 to 7183. [2022-03-15 16:20:47,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7183 states, 7182 states have (on average 2.404204956836536) internal successors, (17267), 7182 states have internal predecessors, (17267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:47,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7183 states to 7183 states and 17267 transitions. [2022-03-15 16:20:47,284 INFO L78 Accepts]: Start accepts. Automaton has 7183 states and 17267 transitions. Word has length 43 [2022-03-15 16:20:47,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:20:47,284 INFO L470 AbstractCegarLoop]: Abstraction has 7183 states and 17267 transitions. [2022-03-15 16:20:47,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.2708333333333335) internal successors, (109), 47 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:47,284 INFO L276 IsEmpty]: Start isEmpty. Operand 7183 states and 17267 transitions. [2022-03-15 16:20:47,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-15 16:20:47,290 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:20:47,290 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:20:47,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-15 16:20:47,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:20:47,499 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:20:47,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:20:47,500 INFO L85 PathProgramCache]: Analyzing trace with hash 289457547, now seen corresponding path program 40 times [2022-03-15 16:20:47,500 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:20:47,500 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034614034] [2022-03-15 16:20:47,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:20:47,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:20:47,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:20:47,686 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:47,686 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:20:47,686 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034614034] [2022-03-15 16:20:47,686 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034614034] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:20:47,686 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917788387] [2022-03-15 16:20:47,686 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:20:47,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:20:47,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:20:47,687 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:20:47,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-15 16:20:47,711 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:20:47,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:20:47,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:20:47,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:20:48,262 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:48,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:20:48,865 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 56 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:48,865 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917788387] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:20:48,865 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:20:48,865 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 20] total 54 [2022-03-15 16:20:48,865 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335678098] [2022-03-15 16:20:48,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:20:48,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-15 16:20:48,866 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:20:48,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-15 16:20:48,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=2395, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 16:20:48,868 INFO L87 Difference]: Start difference. First operand 7183 states and 17267 transitions. Second operand has 55 states, 55 states have (on average 2.2181818181818183) internal successors, (122), 54 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:52,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:20:52,501 INFO L93 Difference]: Finished difference Result 11408 states and 26181 transitions. [2022-03-15 16:20:52,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-03-15 16:20:52,501 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.2181818181818183) internal successors, (122), 54 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-03-15 16:20:52,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:20:52,514 INFO L225 Difference]: With dead ends: 11408 [2022-03-15 16:20:52,514 INFO L226 Difference]: Without dead ends: 10835 [2022-03-15 16:20:52,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12470 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=8734, Invalid=27176, Unknown=0, NotChecked=0, Total=35910 [2022-03-15 16:20:52,517 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 729 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 1683 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 729 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 1831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 1683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:20:52,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [729 Valid, 270 Invalid, 1831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 1683 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 16:20:52,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10835 states. [2022-03-15 16:20:52,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10835 to 7730. [2022-03-15 16:20:52,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7730 states, 7729 states have (on average 2.387631000129383) internal successors, (18454), 7729 states have internal predecessors, (18454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:52,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7730 states to 7730 states and 18454 transitions. [2022-03-15 16:20:52,618 INFO L78 Accepts]: Start accepts. Automaton has 7730 states and 18454 transitions. Word has length 45 [2022-03-15 16:20:52,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:20:52,619 INFO L470 AbstractCegarLoop]: Abstraction has 7730 states and 18454 transitions. [2022-03-15 16:20:52,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.2181818181818183) internal successors, (122), 54 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:52,619 INFO L276 IsEmpty]: Start isEmpty. Operand 7730 states and 18454 transitions. [2022-03-15 16:20:52,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-15 16:20:52,624 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:20:52,624 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:20:52,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-15 16:20:52,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-03-15 16:20:52,825 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:20:52,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:20:52,825 INFO L85 PathProgramCache]: Analyzing trace with hash -2075959915, now seen corresponding path program 41 times [2022-03-15 16:20:52,825 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:20:52,825 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691069593] [2022-03-15 16:20:52,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:20:52,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:20:52,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:20:52,979 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 57 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:52,979 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:20:52,979 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691069593] [2022-03-15 16:20:52,979 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691069593] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:20:52,979 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531910013] [2022-03-15 16:20:52,979 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:20:52,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:20:52,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:20:52,981 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:20:52,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-15 16:20:53,011 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-03-15 16:20:53,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:20:53,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:20:53,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:20:53,526 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 57 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:53,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:20:54,230 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:54,230 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531910013] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:20:54,230 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:20:54,230 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 21, 20] total 47 [2022-03-15 16:20:54,230 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452736945] [2022-03-15 16:20:54,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:20:54,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-15 16:20:54,231 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:20:54,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-15 16:20:54,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=543, Invalid=1713, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 16:20:54,231 INFO L87 Difference]: Start difference. First operand 7730 states and 18454 transitions. Second operand has 48 states, 48 states have (on average 2.375) internal successors, (114), 47 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:58,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:20:58,279 INFO L93 Difference]: Finished difference Result 8996 states and 21001 transitions. [2022-03-15 16:20:58,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2022-03-15 16:20:58,280 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.375) internal successors, (114), 47 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-03-15 16:20:58,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:20:58,291 INFO L225 Difference]: With dead ends: 8996 [2022-03-15 16:20:58,291 INFO L226 Difference]: Without dead ends: 8992 [2022-03-15 16:20:58,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15551 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=10580, Invalid=31240, Unknown=0, NotChecked=0, Total=41820 [2022-03-15 16:20:58,295 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 390 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 1274 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 1391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:20:58,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [390 Valid, 182 Invalid, 1391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1274 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 16:20:58,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8992 states. [2022-03-15 16:20:58,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8992 to 7730. [2022-03-15 16:20:58,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7730 states, 7729 states have (on average 2.387242851597878) internal successors, (18451), 7729 states have internal predecessors, (18451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:58,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7730 states to 7730 states and 18451 transitions. [2022-03-15 16:20:58,401 INFO L78 Accepts]: Start accepts. Automaton has 7730 states and 18451 transitions. Word has length 45 [2022-03-15 16:20:58,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:20:58,401 INFO L470 AbstractCegarLoop]: Abstraction has 7730 states and 18451 transitions. [2022-03-15 16:20:58,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.375) internal successors, (114), 47 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:58,401 INFO L276 IsEmpty]: Start isEmpty. Operand 7730 states and 18451 transitions. [2022-03-15 16:20:58,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-15 16:20:58,407 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:20:58,407 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:20:58,422 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-03-15 16:20:58,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:20:58,608 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:20:58,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:20:58,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1464272399, now seen corresponding path program 42 times [2022-03-15 16:20:58,608 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:20:58,608 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117807425] [2022-03-15 16:20:58,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:20:58,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:20:58,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:20:58,737 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 38 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-15 16:20:58,737 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:20:58,737 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117807425] [2022-03-15 16:20:58,737 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117807425] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:20:58,737 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868015186] [2022-03-15 16:20:58,737 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:20:58,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:20:58,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:20:58,740 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:20:58,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-15 16:20:58,767 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-03-15 16:20:58,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:20:58,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-15 16:20:58,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:20:59,279 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 20 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:59,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:21:00,037 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 25 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:00,037 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868015186] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:21:00,037 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:21:00,037 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 21, 22] total 52 [2022-03-15 16:21:00,037 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740751985] [2022-03-15 16:21:00,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:21:00,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-15 16:21:00,037 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:21:00,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-15 16:21:00,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=516, Invalid=2240, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 16:21:00,038 INFO L87 Difference]: Start difference. First operand 7730 states and 18451 transitions. Second operand has 53 states, 53 states have (on average 2.2452830188679247) internal successors, (119), 52 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:04,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:21:04,884 INFO L93 Difference]: Finished difference Result 27688 states and 62379 transitions. [2022-03-15 16:21:04,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2022-03-15 16:21:04,887 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.2452830188679247) internal successors, (119), 52 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-03-15 16:21:04,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:21:04,929 INFO L225 Difference]: With dead ends: 27688 [2022-03-15 16:21:04,929 INFO L226 Difference]: Without dead ends: 27340 [2022-03-15 16:21:04,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15186 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=9660, Invalid=28170, Unknown=0, NotChecked=0, Total=37830 [2022-03-15 16:21:04,931 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 995 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 1993 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 995 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 2325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 1993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:21:04,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [995 Valid, 254 Invalid, 2325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 1993 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 16:21:04,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27340 states. [2022-03-15 16:21:05,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27340 to 10468. [2022-03-15 16:21:05,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10468 states, 10467 states have (on average 2.3889366580682143) internal successors, (25005), 10467 states have internal predecessors, (25005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:05,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10468 states to 10468 states and 25005 transitions. [2022-03-15 16:21:05,178 INFO L78 Accepts]: Start accepts. Automaton has 10468 states and 25005 transitions. Word has length 45 [2022-03-15 16:21:05,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:21:05,178 INFO L470 AbstractCegarLoop]: Abstraction has 10468 states and 25005 transitions. [2022-03-15 16:21:05,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.2452830188679247) internal successors, (119), 52 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:05,179 INFO L276 IsEmpty]: Start isEmpty. Operand 10468 states and 25005 transitions. [2022-03-15 16:21:05,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-15 16:21:05,187 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:21:05,187 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:21:05,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-15 16:21:05,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:21:05,395 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:21:05,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:21:05,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1927395959, now seen corresponding path program 43 times [2022-03-15 16:21:05,396 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:21:05,396 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819257041] [2022-03-15 16:21:05,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:21:05,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:21:05,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:21:05,502 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 1 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:05,502 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:21:05,502 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819257041] [2022-03-15 16:21:05,502 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819257041] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:21:05,502 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648825322] [2022-03-15 16:21:05,502 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:21:05,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:21:05,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:21:05,503 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:21:05,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-15 16:21:05,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:21:05,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 16:21:05,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:21:05,688 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:05,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:21:06,362 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 64 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:06,362 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648825322] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:21:06,362 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:21:06,362 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 19] total 27 [2022-03-15 16:21:06,362 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545688944] [2022-03-15 16:21:06,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:21:06,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:21:06,363 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:21:06,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:21:06,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=515, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:21:06,363 INFO L87 Difference]: Start difference. First operand 10468 states and 25005 transitions. Second operand has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 27 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:06,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:21:06,609 INFO L93 Difference]: Finished difference Result 13463 states and 32382 transitions. [2022-03-15 16:21:06,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 16:21:06,610 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 27 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-03-15 16:21:06,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:21:06,628 INFO L225 Difference]: With dead ends: 13463 [2022-03-15 16:21:06,628 INFO L226 Difference]: Without dead ends: 13400 [2022-03-15 16:21:06,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 82 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=187, Invalid=515, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:21:06,628 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 290 mSDsluCounter, 896 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:21:06,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 700 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:21:06,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13400 states. [2022-03-15 16:21:06,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13400 to 12840. [2022-03-15 16:21:06,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12840 states, 12839 states have (on average 2.4131941740010903) internal successors, (30983), 12839 states have internal predecessors, (30983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:06,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12840 states to 12840 states and 30983 transitions. [2022-03-15 16:21:06,816 INFO L78 Accepts]: Start accepts. Automaton has 12840 states and 30983 transitions. Word has length 47 [2022-03-15 16:21:06,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:21:06,816 INFO L470 AbstractCegarLoop]: Abstraction has 12840 states and 30983 transitions. [2022-03-15 16:21:06,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 27 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:06,817 INFO L276 IsEmpty]: Start isEmpty. Operand 12840 states and 30983 transitions. [2022-03-15 16:21:06,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-15 16:21:06,826 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:21:06,826 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:21:06,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-15 16:21:07,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-03-15 16:21:07,027 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:21:07,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:21:07,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1790816549, now seen corresponding path program 44 times [2022-03-15 16:21:07,027 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:21:07,027 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014116442] [2022-03-15 16:21:07,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:21:07,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:21:07,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:21:07,335 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:07,335 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:21:07,335 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014116442] [2022-03-15 16:21:07,335 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014116442] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:21:07,335 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337899402] [2022-03-15 16:21:07,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:21:07,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:21:07,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:21:07,337 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:21:07,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-15 16:21:07,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:21:07,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:21:07,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-15 16:21:07,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:21:07,945 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:07,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:21:10,770 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:10,770 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337899402] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:21:10,770 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:21:10,770 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 58 [2022-03-15 16:21:10,770 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820595594] [2022-03-15 16:21:10,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:21:10,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-03-15 16:21:10,771 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:21:10,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-03-15 16:21:10,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=518, Invalid=2904, Unknown=0, NotChecked=0, Total=3422 [2022-03-15 16:21:10,771 INFO L87 Difference]: Start difference. First operand 12840 states and 30983 transitions. Second operand has 59 states, 59 states have (on average 2.152542372881356) internal successors, (127), 58 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:30,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:21:30,873 INFO L93 Difference]: Finished difference Result 20720 states and 47882 transitions. [2022-03-15 16:21:30,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-03-15 16:21:30,873 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.152542372881356) internal successors, (127), 58 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-03-15 16:21:30,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:21:30,899 INFO L225 Difference]: With dead ends: 20720 [2022-03-15 16:21:30,899 INFO L226 Difference]: Without dead ends: 19952 [2022-03-15 16:21:30,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11526 ImplicationChecksByTransitivity, 19.9s TimeCoverageRelationStatistics Valid=6771, Invalid=26535, Unknown=0, NotChecked=0, Total=33306 [2022-03-15 16:21:30,900 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 972 mSDsluCounter, 1532 mSDsCounter, 0 mSdLazyCounter, 3529 mSolverCounterSat, 421 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 972 SdHoareTripleChecker+Valid, 776 SdHoareTripleChecker+Invalid, 3950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 421 IncrementalHoareTripleChecker+Valid, 3529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:21:30,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [972 Valid, 776 Invalid, 3950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [421 Valid, 3529 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-15 16:21:30,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19952 states. [2022-03-15 16:21:31,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19952 to 14485. [2022-03-15 16:21:31,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14485 states, 14484 states have (on average 2.24081745374206) internal successors, (32456), 14484 states have internal predecessors, (32456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:31,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14485 states to 14485 states and 32456 transitions. [2022-03-15 16:21:31,132 INFO L78 Accepts]: Start accepts. Automaton has 14485 states and 32456 transitions. Word has length 47 [2022-03-15 16:21:31,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:21:31,133 INFO L470 AbstractCegarLoop]: Abstraction has 14485 states and 32456 transitions. [2022-03-15 16:21:31,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.152542372881356) internal successors, (127), 58 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:31,133 INFO L276 IsEmpty]: Start isEmpty. Operand 14485 states and 32456 transitions. [2022-03-15 16:21:31,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-15 16:21:31,141 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:21:31,142 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:21:31,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-15 16:21:31,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-03-15 16:21:31,342 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:21:31,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:21:31,342 INFO L85 PathProgramCache]: Analyzing trace with hash -129322871, now seen corresponding path program 45 times [2022-03-15 16:21:31,342 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:21:31,342 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938031406] [2022-03-15 16:21:31,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:21:31,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:21:31,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:21:31,541 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 15 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:31,541 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:21:31,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938031406] [2022-03-15 16:21:31,545 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938031406] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:21:31,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155927274] [2022-03-15 16:21:31,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:21:31,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:21:31,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:21:31,546 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:21:31,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-15 16:21:31,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-03-15 16:21:31,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:21:31,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-15 16:21:31,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:21:32,165 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 15 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:32,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:21:34,292 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 22 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:34,292 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155927274] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:21:34,292 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:21:34,293 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 22, 22] total 53 [2022-03-15 16:21:34,293 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127091919] [2022-03-15 16:21:34,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:21:34,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-03-15 16:21:34,293 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:21:34,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-03-15 16:21:34,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=660, Invalid=2202, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 16:21:34,293 INFO L87 Difference]: Start difference. First operand 14485 states and 32456 transitions. Second operand has 54 states, 54 states have (on average 2.240740740740741) internal successors, (121), 53 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:42,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:21:42,513 INFO L93 Difference]: Finished difference Result 24787 states and 56061 transitions. [2022-03-15 16:21:42,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-03-15 16:21:42,514 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.240740740740741) internal successors, (121), 53 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-03-15 16:21:42,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:21:42,546 INFO L225 Difference]: With dead ends: 24787 [2022-03-15 16:21:42,546 INFO L226 Difference]: Without dead ends: 24781 [2022-03-15 16:21:42,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8411 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=5603, Invalid=17653, Unknown=0, NotChecked=0, Total=23256 [2022-03-15 16:21:42,547 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 986 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 3687 mSolverCounterSat, 608 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 986 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 4295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 608 IncrementalHoareTripleChecker+Valid, 3687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:21:42,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [986 Valid, 283 Invalid, 4295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [608 Valid, 3687 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-15 16:21:42,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24781 states. [2022-03-15 16:21:42,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24781 to 18743. [2022-03-15 16:21:42,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18743 states, 18742 states have (on average 2.2557891366983247) internal successors, (42278), 18742 states have internal predecessors, (42278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:42,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18743 states to 18743 states and 42278 transitions. [2022-03-15 16:21:42,860 INFO L78 Accepts]: Start accepts. Automaton has 18743 states and 42278 transitions. Word has length 47 [2022-03-15 16:21:42,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:21:42,860 INFO L470 AbstractCegarLoop]: Abstraction has 18743 states and 42278 transitions. [2022-03-15 16:21:42,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.240740740740741) internal successors, (121), 53 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:42,861 INFO L276 IsEmpty]: Start isEmpty. Operand 18743 states and 42278 transitions. [2022-03-15 16:21:42,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-15 16:21:42,871 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:21:42,872 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:21:42,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-15 16:21:43,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-03-15 16:21:43,083 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:21:43,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:21:43,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1055250745, now seen corresponding path program 46 times [2022-03-15 16:21:43,084 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:21:43,084 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793952021] [2022-03-15 16:21:43,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:21:43,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:21:43,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:21:43,226 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 51 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:43,226 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:21:43,226 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793952021] [2022-03-15 16:21:43,226 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793952021] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:21:43,226 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801097752] [2022-03-15 16:21:43,226 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:21:43,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:21:43,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:21:43,227 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:21:43,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-15 16:21:43,255 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:21:43,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:21:43,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-15 16:21:43,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:21:43,924 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 51 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:43,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:21:44,487 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 58 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:44,487 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801097752] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:21:44,487 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:21:44,488 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 22, 22] total 52 [2022-03-15 16:21:44,488 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880254518] [2022-03-15 16:21:44,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:21:44,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-15 16:21:44,488 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:21:44,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-15 16:21:44,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=619, Invalid=2137, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 16:21:44,489 INFO L87 Difference]: Start difference. First operand 18743 states and 42278 transitions. Second operand has 53 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 52 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:48,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:21:48,914 INFO L93 Difference]: Finished difference Result 26020 states and 58276 transitions. [2022-03-15 16:21:48,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2022-03-15 16:21:48,914 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 52 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-03-15 16:21:48,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:21:48,954 INFO L225 Difference]: With dead ends: 26020 [2022-03-15 16:21:48,954 INFO L226 Difference]: Without dead ends: 26016 [2022-03-15 16:21:48,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16812 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=11497, Invalid=34085, Unknown=0, NotChecked=0, Total=45582 [2022-03-15 16:21:48,957 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 728 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 1552 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 1760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 1552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:21:48,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [728 Valid, 345 Invalid, 1760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 1552 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 16:21:48,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26016 states. [2022-03-15 16:21:49,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26016 to 18578. [2022-03-15 16:21:49,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18578 states, 18577 states have (on average 2.264143833772945) internal successors, (42061), 18577 states have internal predecessors, (42061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:49,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18578 states to 18578 states and 42061 transitions. [2022-03-15 16:21:49,267 INFO L78 Accepts]: Start accepts. Automaton has 18578 states and 42061 transitions. Word has length 47 [2022-03-15 16:21:49,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:21:49,268 INFO L470 AbstractCegarLoop]: Abstraction has 18578 states and 42061 transitions. [2022-03-15 16:21:49,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 52 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:49,268 INFO L276 IsEmpty]: Start isEmpty. Operand 18578 states and 42061 transitions. [2022-03-15 16:21:49,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-15 16:21:49,279 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:21:49,280 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:21:49,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-15 16:21:49,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:21:49,495 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:21:49,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:21:49,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1962795719, now seen corresponding path program 47 times [2022-03-15 16:21:49,495 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:21:49,495 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094187802] [2022-03-15 16:21:49,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:21:49,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:21:49,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:21:49,677 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:49,677 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:21:49,677 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094187802] [2022-03-15 16:21:49,677 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094187802] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:21:49,677 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140672503] [2022-03-15 16:21:49,677 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:21:49,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:21:49,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:21:49,678 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:21:49,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-15 16:21:49,706 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-03-15 16:21:49,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:21:49,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-15 16:21:49,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:21:50,262 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:50,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:21:50,991 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 72 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:50,991 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140672503] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:21:50,991 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:21:50,992 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 22] total 60 [2022-03-15 16:21:50,992 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18920546] [2022-03-15 16:21:50,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:21:50,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-03-15 16:21:50,992 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:21:50,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-03-15 16:21:50,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=699, Invalid=2961, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 16:21:50,993 INFO L87 Difference]: Start difference. First operand 18578 states and 42061 transitions. Second operand has 61 states, 61 states have (on average 2.19672131147541) internal successors, (134), 60 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:55,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:21:55,714 INFO L93 Difference]: Finished difference Result 21738 states and 48486 transitions. [2022-03-15 16:21:55,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2022-03-15 16:21:55,714 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.19672131147541) internal successors, (134), 60 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-03-15 16:21:55,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:21:55,742 INFO L225 Difference]: With dead ends: 21738 [2022-03-15 16:21:55,743 INFO L226 Difference]: Without dead ends: 21222 [2022-03-15 16:21:55,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18341 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=12357, Invalid=38493, Unknown=0, NotChecked=0, Total=50850 [2022-03-15 16:21:55,745 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 906 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 1845 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 906 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 2002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:21:55,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [906 Valid, 294 Invalid, 2002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1845 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 16:21:55,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21222 states. [2022-03-15 16:21:55,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21222 to 18290. [2022-03-15 16:21:56,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18290 states, 18289 states have (on average 2.263601071682432) internal successors, (41399), 18289 states have internal predecessors, (41399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:56,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18290 states to 18290 states and 41399 transitions. [2022-03-15 16:21:56,037 INFO L78 Accepts]: Start accepts. Automaton has 18290 states and 41399 transitions. Word has length 49 [2022-03-15 16:21:56,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:21:56,037 INFO L470 AbstractCegarLoop]: Abstraction has 18290 states and 41399 transitions. [2022-03-15 16:21:56,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.19672131147541) internal successors, (134), 60 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:56,037 INFO L276 IsEmpty]: Start isEmpty. Operand 18290 states and 41399 transitions. [2022-03-15 16:21:56,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-15 16:21:56,047 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:21:56,047 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:21:56,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-15 16:21:56,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-03-15 16:21:56,248 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:21:56,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:21:56,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1919003925, now seen corresponding path program 48 times [2022-03-15 16:21:56,299 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:21:56,299 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072328551] [2022-03-15 16:21:56,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:21:56,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:21:56,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:21:56,434 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:56,434 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:21:56,434 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072328551] [2022-03-15 16:21:56,434 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072328551] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:21:56,434 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190781578] [2022-03-15 16:21:56,434 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:21:56,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:21:56,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:21:56,435 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:21:56,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-15 16:21:56,464 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-03-15 16:21:56,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:21:56,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:21:56,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:21:57,016 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:57,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:21:57,724 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:57,724 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190781578] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:21:57,724 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:21:57,724 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 23, 22] total 52 [2022-03-15 16:21:57,725 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099279749] [2022-03-15 16:21:57,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:21:57,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-15 16:21:57,725 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:21:57,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-15 16:21:57,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=661, Invalid=2095, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 16:21:57,725 INFO L87 Difference]: Start difference. First operand 18290 states and 41399 transitions. Second operand has 53 states, 53 states have (on average 2.3773584905660377) internal successors, (126), 52 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:03,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:22:03,063 INFO L93 Difference]: Finished difference Result 19699 states and 44208 transitions. [2022-03-15 16:22:03,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2022-03-15 16:22:03,063 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.3773584905660377) internal successors, (126), 52 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-03-15 16:22:03,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:22:03,088 INFO L225 Difference]: With dead ends: 19699 [2022-03-15 16:22:03,088 INFO L226 Difference]: Without dead ends: 19695 [2022-03-15 16:22:03,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23346 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=14862, Invalid=44918, Unknown=0, NotChecked=0, Total=59780 [2022-03-15 16:22:03,094 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 482 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 1316 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 1433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:22:03,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [482 Valid, 167 Invalid, 1433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1316 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 16:22:03,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19695 states. [2022-03-15 16:22:03,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19695 to 18290. [2022-03-15 16:22:03,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18290 states, 18289 states have (on average 2.2634917163322217) internal successors, (41397), 18289 states have internal predecessors, (41397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:03,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18290 states to 18290 states and 41397 transitions. [2022-03-15 16:22:03,337 INFO L78 Accepts]: Start accepts. Automaton has 18290 states and 41397 transitions. Word has length 49 [2022-03-15 16:22:03,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:22:03,337 INFO L470 AbstractCegarLoop]: Abstraction has 18290 states and 41397 transitions. [2022-03-15 16:22:03,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.3773584905660377) internal successors, (126), 52 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:03,337 INFO L276 IsEmpty]: Start isEmpty. Operand 18290 states and 41397 transitions. [2022-03-15 16:22:03,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-15 16:22:03,349 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:22:03,349 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:22:03,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-15 16:22:03,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-15 16:22:03,549 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:22:03,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:22:03,550 INFO L85 PathProgramCache]: Analyzing trace with hash 736975417, now seen corresponding path program 49 times [2022-03-15 16:22:03,550 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:22:03,550 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799403912] [2022-03-15 16:22:03,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:22:03,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:22:03,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:22:03,751 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 56 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:03,751 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:22:03,751 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799403912] [2022-03-15 16:22:03,751 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799403912] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:22:03,751 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168388766] [2022-03-15 16:22:03,751 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:22:03,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:22:03,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:22:03,752 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:22:03,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-15 16:22:03,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:22:03,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:22:03,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:22:04,483 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 56 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:04,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:22:05,258 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 49 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:05,259 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168388766] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:22:05,259 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:22:05,259 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 24] total 65 [2022-03-15 16:22:05,259 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125837385] [2022-03-15 16:22:05,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:22:05,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-03-15 16:22:05,259 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:22:05,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-03-15 16:22:05,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=772, Invalid=3518, Unknown=0, NotChecked=0, Total=4290 [2022-03-15 16:22:05,260 INFO L87 Difference]: Start difference. First operand 18290 states and 41397 transitions. Second operand has 66 states, 66 states have (on average 2.121212121212121) internal successors, (140), 65 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:14,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:22:14,113 INFO L93 Difference]: Finished difference Result 43892 states and 98386 transitions. [2022-03-15 16:22:14,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 254 states. [2022-03-15 16:22:14,114 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.121212121212121) internal successors, (140), 65 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-03-15 16:22:14,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:22:14,178 INFO L225 Difference]: With dead ends: 43892 [2022-03-15 16:22:14,178 INFO L226 Difference]: Without dead ends: 43177 [2022-03-15 16:22:14,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 313 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42237 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=24395, Invalid=74515, Unknown=0, NotChecked=0, Total=98910 [2022-03-15 16:22:14,182 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 1531 mSDsluCounter, 1145 mSDsCounter, 0 mSdLazyCounter, 2707 mSolverCounterSat, 337 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1531 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 3044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 337 IncrementalHoareTripleChecker+Valid, 2707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:22:14,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1531 Valid, 665 Invalid, 3044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [337 Valid, 2707 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-15 16:22:14,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43177 states. [2022-03-15 16:22:14,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43177 to 21332. [2022-03-15 16:22:14,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21332 states, 21331 states have (on average 2.2915475130092355) internal successors, (48881), 21331 states have internal predecessors, (48881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:14,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21332 states to 21332 states and 48881 transitions. [2022-03-15 16:22:14,617 INFO L78 Accepts]: Start accepts. Automaton has 21332 states and 48881 transitions. Word has length 49 [2022-03-15 16:22:14,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:22:14,617 INFO L470 AbstractCegarLoop]: Abstraction has 21332 states and 48881 transitions. [2022-03-15 16:22:14,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.121212121212121) internal successors, (140), 65 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:14,617 INFO L276 IsEmpty]: Start isEmpty. Operand 21332 states and 48881 transitions. [2022-03-15 16:22:14,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-15 16:22:14,632 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:22:14,632 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:22:14,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-15 16:22:14,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:22:14,833 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:22:14,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:22:14,834 INFO L85 PathProgramCache]: Analyzing trace with hash -167181371, now seen corresponding path program 50 times [2022-03-15 16:22:14,834 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:22:14,834 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987369100] [2022-03-15 16:22:14,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:22:14,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:22:14,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:22:14,957 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 1 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:14,957 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:22:14,958 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987369100] [2022-03-15 16:22:14,958 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987369100] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:22:14,958 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105679478] [2022-03-15 16:22:14,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:22:14,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:22:14,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:22:14,968 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:22:14,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-15 16:22:14,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:22:14,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:22:14,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-15 16:22:14,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:22:15,258 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:15,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:22:15,658 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 81 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:15,658 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105679478] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:22:15,658 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:22:15,658 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 21] total 30 [2022-03-15 16:22:15,658 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626715340] [2022-03-15 16:22:15,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:22:15,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:22:15,659 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:22:15,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:22:15,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=642, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:22:15,659 INFO L87 Difference]: Start difference. First operand 21332 states and 48881 transitions. Second operand has 30 states, 30 states have (on average 3.2) internal successors, (96), 30 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:15,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:22:15,961 INFO L93 Difference]: Finished difference Result 26854 states and 62395 transitions. [2022-03-15 16:22:15,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 16:22:15,961 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.2) internal successors, (96), 30 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-03-15 16:22:15,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:22:16,002 INFO L225 Difference]: With dead ends: 26854 [2022-03-15 16:22:16,002 INFO L226 Difference]: Without dead ends: 26785 [2022-03-15 16:22:16,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 89 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=228, Invalid=642, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:22:16,002 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 309 mSDsluCounter, 1166 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 896 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:22:16,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 896 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 741 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:22:16,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26785 states. [2022-03-15 16:22:16,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26785 to 25947. [2022-03-15 16:22:16,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25947 states, 25946 states have (on average 2.3242503661450704) internal successors, (60305), 25946 states have internal predecessors, (60305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:16,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25947 states to 25947 states and 60305 transitions. [2022-03-15 16:22:16,443 INFO L78 Accepts]: Start accepts. Automaton has 25947 states and 60305 transitions. Word has length 51 [2022-03-15 16:22:16,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:22:16,443 INFO L470 AbstractCegarLoop]: Abstraction has 25947 states and 60305 transitions. [2022-03-15 16:22:16,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.2) internal successors, (96), 30 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:16,443 INFO L276 IsEmpty]: Start isEmpty. Operand 25947 states and 60305 transitions. [2022-03-15 16:22:16,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-15 16:22:16,463 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:22:16,463 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:22:16,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-03-15 16:22:16,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-03-15 16:22:16,663 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:22:16,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:22:16,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1055790999, now seen corresponding path program 51 times [2022-03-15 16:22:16,664 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:22:16,664 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902975555] [2022-03-15 16:22:16,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:22:16,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:22:16,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:22:17,008 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:17,008 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:22:17,008 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902975555] [2022-03-15 16:22:17,008 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902975555] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:22:17,008 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573364988] [2022-03-15 16:22:17,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:22:17,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:22:17,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:22:17,009 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:22:17,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-15 16:22:17,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-03-15 16:22:17,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:22:17,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-15 16:22:17,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:22:17,381 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 20 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:17,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:22:17,609 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:17,609 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573364988] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:22:17,609 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:22:17,609 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 18, 13] total 45 [2022-03-15 16:22:17,609 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327106750] [2022-03-15 16:22:17,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:22:17,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-15 16:22:17,610 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:22:17,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-15 16:22:17,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=1643, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 16:22:17,610 INFO L87 Difference]: Start difference. First operand 25947 states and 60305 transitions. Second operand has 45 states, 45 states have (on average 2.8444444444444446) internal successors, (128), 45 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:19,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:22:19,231 INFO L93 Difference]: Finished difference Result 36532 states and 85714 transitions. [2022-03-15 16:22:19,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-15 16:22:19,231 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.8444444444444446) internal successors, (128), 45 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-03-15 16:22:19,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:22:19,288 INFO L225 Difference]: With dead ends: 36532 [2022-03-15 16:22:19,288 INFO L226 Difference]: Without dead ends: 36520 [2022-03-15 16:22:19,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 77 SyntacticMatches, 4 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1438 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=946, Invalid=5534, Unknown=0, NotChecked=0, Total=6480 [2022-03-15 16:22:19,289 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 641 mSDsluCounter, 1530 mSDsCounter, 0 mSdLazyCounter, 2348 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 641 SdHoareTripleChecker+Valid, 838 SdHoareTripleChecker+Invalid, 2508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 2348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:22:19,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [641 Valid, 838 Invalid, 2508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 2348 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 16:22:19,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36520 states. [2022-03-15 16:22:19,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36520 to 25202. [2022-03-15 16:22:19,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25202 states, 25201 states have (on average 2.336097773897861) internal successors, (58872), 25201 states have internal predecessors, (58872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:19,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25202 states to 25202 states and 58872 transitions. [2022-03-15 16:22:19,753 INFO L78 Accepts]: Start accepts. Automaton has 25202 states and 58872 transitions. Word has length 51 [2022-03-15 16:22:19,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:22:19,753 INFO L470 AbstractCegarLoop]: Abstraction has 25202 states and 58872 transitions. [2022-03-15 16:22:19,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.8444444444444446) internal successors, (128), 45 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:19,754 INFO L276 IsEmpty]: Start isEmpty. Operand 25202 states and 58872 transitions. [2022-03-15 16:22:19,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-15 16:22:19,769 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:22:19,769 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:22:19,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-15 16:22:19,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:22:19,970 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:22:19,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:22:19,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1171523909, now seen corresponding path program 52 times [2022-03-15 16:22:19,970 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:22:19,970 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83041221] [2022-03-15 16:22:19,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:22:19,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:22:19,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:22:20,199 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 17 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:20,199 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:22:20,199 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83041221] [2022-03-15 16:22:20,199 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83041221] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:22:20,199 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435371785] [2022-03-15 16:22:20,199 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:22:20,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:22:20,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:22:20,201 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:22:20,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-15 16:22:20,226 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:22:20,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:22:20,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-15 16:22:20,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:22:20,869 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 17 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:20,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:22:24,111 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 25 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:24,111 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435371785] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:22:24,111 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:22:24,111 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 24, 24] total 58 [2022-03-15 16:22:24,111 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084998825] [2022-03-15 16:22:24,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:22:24,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-03-15 16:22:24,112 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:22:24,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-03-15 16:22:24,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=793, Invalid=2629, Unknown=0, NotChecked=0, Total=3422 [2022-03-15 16:22:24,112 INFO L87 Difference]: Start difference. First operand 25202 states and 58872 transitions. Second operand has 59 states, 59 states have (on average 2.2542372881355934) internal successors, (133), 58 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:35,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:22:35,781 INFO L93 Difference]: Finished difference Result 34543 states and 81614 transitions. [2022-03-15 16:22:35,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-03-15 16:22:35,782 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.2542372881355934) internal successors, (133), 58 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-03-15 16:22:35,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:22:35,848 INFO L225 Difference]: With dead ends: 34543 [2022-03-15 16:22:35,848 INFO L226 Difference]: Without dead ends: 34535 [2022-03-15 16:22:35,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10326 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=6811, Invalid=21581, Unknown=0, NotChecked=0, Total=28392 [2022-03-15 16:22:35,851 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 1051 mSDsluCounter, 735 mSDsCounter, 0 mSdLazyCounter, 4721 mSolverCounterSat, 691 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1051 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 5412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 691 IncrementalHoareTripleChecker+Valid, 4721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:22:35,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1051 Valid, 292 Invalid, 5412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [691 Valid, 4721 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-15 16:22:35,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34535 states. [2022-03-15 16:22:36,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34535 to 25675. [2022-03-15 16:22:36,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25675 states, 25674 states have (on average 2.361221469190621) internal successors, (60622), 25674 states have internal predecessors, (60622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:36,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25675 states to 25675 states and 60622 transitions. [2022-03-15 16:22:36,288 INFO L78 Accepts]: Start accepts. Automaton has 25675 states and 60622 transitions. Word has length 51 [2022-03-15 16:22:36,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:22:36,288 INFO L470 AbstractCegarLoop]: Abstraction has 25675 states and 60622 transitions. [2022-03-15 16:22:36,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.2542372881355934) internal successors, (133), 58 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:36,288 INFO L276 IsEmpty]: Start isEmpty. Operand 25675 states and 60622 transitions. [2022-03-15 16:22:36,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-15 16:22:36,307 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:22:36,307 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:22:36,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-15 16:22:36,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-03-15 16:22:36,507 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:22:36,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:22:36,508 INFO L85 PathProgramCache]: Analyzing trace with hash -697184709, now seen corresponding path program 53 times [2022-03-15 16:22:36,508 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:22:36,508 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757009371] [2022-03-15 16:22:36,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:22:36,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:22:36,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:22:36,677 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 79 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 16:22:36,677 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:22:36,677 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757009371] [2022-03-15 16:22:36,677 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757009371] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:22:36,678 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588194054] [2022-03-15 16:22:36,678 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:22:36,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:22:36,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:22:36,680 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:22:36,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-15 16:22:36,715 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-03-15 16:22:36,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:22:36,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-15 16:22:36,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:22:37,318 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 49 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:37,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:22:38,061 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 49 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:38,062 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588194054] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:22:38,062 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:22:38,062 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 24, 24] total 62 [2022-03-15 16:22:38,062 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958471218] [2022-03-15 16:22:38,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:22:38,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-03-15 16:22:38,062 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:22:38,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-03-15 16:22:38,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=745, Invalid=3161, Unknown=0, NotChecked=0, Total=3906 [2022-03-15 16:22:38,063 INFO L87 Difference]: Start difference. First operand 25675 states and 60622 transitions. Second operand has 63 states, 63 states have (on average 2.238095238095238) internal successors, (141), 62 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:47,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:22:47,965 INFO L93 Difference]: Finished difference Result 79019 states and 180082 transitions. [2022-03-15 16:22:47,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 272 states. [2022-03-15 16:22:47,965 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.238095238095238) internal successors, (141), 62 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-03-15 16:22:47,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:22:48,111 INFO L225 Difference]: With dead ends: 79019 [2022-03-15 16:22:48,112 INFO L226 Difference]: Without dead ends: 78230 [2022-03-15 16:22:48,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 328 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52482 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=27833, Invalid=80737, Unknown=0, NotChecked=0, Total=108570 [2022-03-15 16:22:48,117 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1246 mSDsluCounter, 911 mSDsCounter, 0 mSdLazyCounter, 2901 mSolverCounterSat, 324 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1246 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 3225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 2901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:22:48,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1246 Valid, 441 Invalid, 3225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [324 Valid, 2901 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-15 16:22:48,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78230 states. [2022-03-15 16:22:48,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78230 to 26716. [2022-03-15 16:22:48,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26716 states, 26715 states have (on average 2.348493355792626) internal successors, (62740), 26715 states have internal predecessors, (62740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:48,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26716 states to 26716 states and 62740 transitions. [2022-03-15 16:22:48,899 INFO L78 Accepts]: Start accepts. Automaton has 26716 states and 62740 transitions. Word has length 51 [2022-03-15 16:22:48,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:22:48,899 INFO L470 AbstractCegarLoop]: Abstraction has 26716 states and 62740 transitions. [2022-03-15 16:22:48,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.238095238095238) internal successors, (141), 62 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:48,899 INFO L276 IsEmpty]: Start isEmpty. Operand 26716 states and 62740 transitions. [2022-03-15 16:22:48,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-15 16:22:48,916 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:22:48,916 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:22:48,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-15 16:22:49,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-03-15 16:22:49,117 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:22:49,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:22:49,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1152851267, now seen corresponding path program 54 times [2022-03-15 16:22:49,117 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:22:49,117 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916327209] [2022-03-15 16:22:49,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:22:49,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:22:49,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:22:49,261 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 66 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:49,261 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:22:49,261 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916327209] [2022-03-15 16:22:49,261 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916327209] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:22:49,261 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200041258] [2022-03-15 16:22:49,261 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:22:49,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:22:49,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:22:49,262 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:22:49,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-15 16:22:49,291 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-03-15 16:22:49,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:22:49,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-15 16:22:49,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:22:49,964 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 66 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:49,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:22:50,628 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 74 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:50,628 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200041258] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:22:50,628 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:22:50,628 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 24, 24] total 57 [2022-03-15 16:22:50,628 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341037517] [2022-03-15 16:22:50,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:22:50,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-03-15 16:22:50,629 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:22:50,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-03-15 16:22:50,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=736, Invalid=2570, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 16:22:50,630 INFO L87 Difference]: Start difference. First operand 26716 states and 62740 transitions. Second operand has 58 states, 58 states have (on average 2.293103448275862) internal successors, (133), 57 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:56,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:22:56,356 INFO L93 Difference]: Finished difference Result 32210 states and 74811 transitions. [2022-03-15 16:22:56,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-03-15 16:22:56,357 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.293103448275862) internal successors, (133), 57 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-03-15 16:22:56,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:22:56,407 INFO L225 Difference]: With dead ends: 32210 [2022-03-15 16:22:56,407 INFO L226 Difference]: Without dead ends: 32204 [2022-03-15 16:22:56,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24859 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=16298, Invalid=48472, Unknown=0, NotChecked=0, Total=64770 [2022-03-15 16:22:56,413 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 646 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 1606 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 646 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 1812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 1606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:22:56,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [646 Valid, 199 Invalid, 1812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 1606 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 16:22:56,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32204 states. [2022-03-15 16:22:56,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32204 to 25976. [2022-03-15 16:22:56,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25976 states, 25975 states have (on average 2.3487584215591917) internal successors, (61009), 25975 states have internal predecessors, (61009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:56,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25976 states to 25976 states and 61009 transitions. [2022-03-15 16:22:56,836 INFO L78 Accepts]: Start accepts. Automaton has 25976 states and 61009 transitions. Word has length 51 [2022-03-15 16:22:56,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:22:56,836 INFO L470 AbstractCegarLoop]: Abstraction has 25976 states and 61009 transitions. [2022-03-15 16:22:56,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.293103448275862) internal successors, (133), 57 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:56,836 INFO L276 IsEmpty]: Start isEmpty. Operand 25976 states and 61009 transitions. [2022-03-15 16:22:56,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-15 16:22:56,854 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:22:56,854 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:22:56,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-03-15 16:22:57,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:22:57,054 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:22:57,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:22:57,055 INFO L85 PathProgramCache]: Analyzing trace with hash 2117849603, now seen corresponding path program 55 times [2022-03-15 16:22:57,055 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:22:57,055 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622271275] [2022-03-15 16:22:57,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:22:57,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:22:57,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:22:57,291 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:57,291 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:22:57,291 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622271275] [2022-03-15 16:22:57,292 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622271275] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:22:57,292 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638094425] [2022-03-15 16:22:57,292 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:22:57,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:22:57,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:22:57,293 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:22:57,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-15 16:22:57,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:22:57,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-15 16:22:57,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:22:57,932 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:57,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:22:58,667 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 90 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:58,667 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638094425] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:22:58,668 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:22:58,668 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 24] total 66 [2022-03-15 16:22:58,668 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189609588] [2022-03-15 16:22:58,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:22:58,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-03-15 16:22:58,668 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:22:58,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-03-15 16:22:58,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=835, Invalid=3587, Unknown=0, NotChecked=0, Total=4422 [2022-03-15 16:22:58,669 INFO L87 Difference]: Start difference. First operand 25976 states and 61009 transitions. Second operand has 67 states, 67 states have (on average 2.1791044776119404) internal successors, (146), 66 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:23:04,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:23:04,931 INFO L93 Difference]: Finished difference Result 31601 states and 72593 transitions. [2022-03-15 16:23:04,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 203 states. [2022-03-15 16:23:04,932 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.1791044776119404) internal successors, (146), 66 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-03-15 16:23:04,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:23:04,975 INFO L225 Difference]: With dead ends: 31601 [2022-03-15 16:23:04,976 INFO L226 Difference]: Without dead ends: 30794 [2022-03-15 16:23:04,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26120 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=17002, Invalid=52958, Unknown=0, NotChecked=0, Total=69960 [2022-03-15 16:23:04,979 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 765 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 2431 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 765 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 2583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 2431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:23:04,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [765 Valid, 338 Invalid, 2583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 2431 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-15 16:23:05,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30794 states. [2022-03-15 16:23:05,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30794 to 25945. [2022-03-15 16:23:05,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25945 states, 25944 states have (on average 2.3479031760715388) internal successors, (60914), 25944 states have internal predecessors, (60914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:23:05,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25945 states to 25945 states and 60914 transitions. [2022-03-15 16:23:05,360 INFO L78 Accepts]: Start accepts. Automaton has 25945 states and 60914 transitions. Word has length 53 [2022-03-15 16:23:05,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:23:05,360 INFO L470 AbstractCegarLoop]: Abstraction has 25945 states and 60914 transitions. [2022-03-15 16:23:05,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.1791044776119404) internal successors, (146), 66 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:23:05,360 INFO L276 IsEmpty]: Start isEmpty. Operand 25945 states and 60914 transitions. [2022-03-15 16:23:05,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-15 16:23:05,378 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:23:05,378 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:23:05,399 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-03-15 16:23:05,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:23:05,578 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:23:05,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:23:05,578 INFO L85 PathProgramCache]: Analyzing trace with hash -226669163, now seen corresponding path program 56 times [2022-03-15 16:23:05,578 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:23:05,579 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141937633] [2022-03-15 16:23:05,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:23:05,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:23:05,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:23:05,717 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:23:05,718 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:23:05,718 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141937633] [2022-03-15 16:23:05,718 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141937633] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:23:05,718 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878697302] [2022-03-15 16:23:05,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:23:05,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:23:05,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:23:05,719 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:23:05,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-15 16:23:05,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:23:05,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:23:05,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:23:05,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:23:06,354 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:23:06,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:23:07,196 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:23:07,197 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878697302] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:23:07,197 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:23:07,197 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 24, 23] total 55 [2022-03-15 16:23:07,197 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976315890] [2022-03-15 16:23:07,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:23:07,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-03-15 16:23:07,197 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:23:07,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-03-15 16:23:07,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=746, Invalid=2334, Unknown=0, NotChecked=0, Total=3080 [2022-03-15 16:23:07,198 INFO L87 Difference]: Start difference. First operand 25945 states and 60914 transitions. Second operand has 56 states, 56 states have (on average 2.4642857142857144) internal successors, (138), 55 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:23:10,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:23:10,912 INFO L93 Difference]: Finished difference Result 27616 states and 64299 transitions. [2022-03-15 16:23:10,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2022-03-15 16:23:10,912 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.4642857142857144) internal successors, (138), 55 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-03-15 16:23:10,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:23:10,957 INFO L225 Difference]: With dead ends: 27616 [2022-03-15 16:23:10,957 INFO L226 Difference]: Without dead ends: 27612 [2022-03-15 16:23:10,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13769 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=10216, Invalid=28790, Unknown=0, NotChecked=0, Total=39006 [2022-03-15 16:23:10,962 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 470 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 1173 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 1277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:23:10,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [470 Valid, 123 Invalid, 1277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1173 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 16:23:10,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27612 states. [2022-03-15 16:23:11,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27612 to 25945. [2022-03-15 16:23:11,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25945 states, 25944 states have (on average 2.347787542399013) internal successors, (60911), 25944 states have internal predecessors, (60911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:23:11,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25945 states to 25945 states and 60911 transitions. [2022-03-15 16:23:11,390 INFO L78 Accepts]: Start accepts. Automaton has 25945 states and 60911 transitions. Word has length 53 [2022-03-15 16:23:11,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:23:11,390 INFO L470 AbstractCegarLoop]: Abstraction has 25945 states and 60911 transitions. [2022-03-15 16:23:11,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.4642857142857144) internal successors, (138), 55 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:23:11,390 INFO L276 IsEmpty]: Start isEmpty. Operand 25945 states and 60911 transitions. [2022-03-15 16:23:11,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-15 16:23:11,410 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:23:11,410 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:23:11,427 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-03-15 16:23:11,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:23:11,610 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:23:11,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:23:11,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1484254207, now seen corresponding path program 57 times [2022-03-15 16:23:11,611 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:23:11,611 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834270961] [2022-03-15 16:23:11,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:23:11,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:23:11,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:23:11,743 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 1 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:23:11,743 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:23:11,744 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834270961] [2022-03-15 16:23:11,744 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834270961] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:23:11,744 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719319618] [2022-03-15 16:23:11,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:23:11,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:23:11,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:23:11,745 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:23:11,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-15 16:23:11,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-03-15 16:23:11,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:23:11,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:23:11,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:23:12,021 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 25 proven. 175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:23:12,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:23:12,266 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 81 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:23:12,266 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719319618] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:23:12,266 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:23:12,267 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 20, 16] total 29 [2022-03-15 16:23:12,267 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040963091] [2022-03-15 16:23:12,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:23:12,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:23:12,267 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:23:12,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:23:12,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=595, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:23:12,267 INFO L87 Difference]: Start difference. First operand 25945 states and 60911 transitions. Second operand has 29 states, 29 states have (on average 3.7241379310344827) internal successors, (108), 29 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:23:12,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:23:12,888 INFO L93 Difference]: Finished difference Result 36620 states and 86993 transitions. [2022-03-15 16:23:12,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 16:23:12,889 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.7241379310344827) internal successors, (108), 29 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-03-15 16:23:12,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:23:12,948 INFO L225 Difference]: With dead ends: 36620 [2022-03-15 16:23:12,948 INFO L226 Difference]: Without dead ends: 36529 [2022-03-15 16:23:12,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 100 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=1287, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 16:23:12,949 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 307 mSDsluCounter, 1637 mSDsCounter, 0 mSdLazyCounter, 1210 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 1263 SdHoareTripleChecker+Invalid, 1269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:23:12,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 1263 Invalid, 1269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1210 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:23:12,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36529 states. [2022-03-15 16:23:13,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36529 to 31629. [2022-03-15 16:23:13,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31629 states, 31628 states have (on average 2.3720753762488935) internal successors, (75024), 31628 states have internal predecessors, (75024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:23:13,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31629 states to 31629 states and 75024 transitions. [2022-03-15 16:23:13,524 INFO L78 Accepts]: Start accepts. Automaton has 31629 states and 75024 transitions. Word has length 55 [2022-03-15 16:23:13,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:23:13,524 INFO L470 AbstractCegarLoop]: Abstraction has 31629 states and 75024 transitions. [2022-03-15 16:23:13,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.7241379310344827) internal successors, (108), 29 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:23:13,524 INFO L276 IsEmpty]: Start isEmpty. Operand 31629 states and 75024 transitions. [2022-03-15 16:23:13,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-15 16:23:13,547 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:23:13,547 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:23:13,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-03-15 16:23:13,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-03-15 16:23:13,751 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:23:13,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:23:13,752 INFO L85 PathProgramCache]: Analyzing trace with hash 783619073, now seen corresponding path program 58 times [2022-03-15 16:23:13,752 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:23:13,752 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163814452] [2022-03-15 16:23:13,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:23:13,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:23:13,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:23:13,994 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 19 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:23:13,994 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:23:13,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163814452] [2022-03-15 16:23:13,994 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163814452] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:23:13,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439061504] [2022-03-15 16:23:13,994 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:23:13,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:23:13,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:23:13,995 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:23:13,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-15 16:23:14,022 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:23:14,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:23:14,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-15 16:23:14,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:23:14,767 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 19 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:23:14,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:23:18,580 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 28 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:23:18,580 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439061504] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:23:18,580 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:23:18,580 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 26, 26] total 63 [2022-03-15 16:23:18,580 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705326598] [2022-03-15 16:23:18,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:23:18,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-03-15 16:23:18,581 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:23:18,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-03-15 16:23:18,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=939, Invalid=3093, Unknown=0, NotChecked=0, Total=4032 [2022-03-15 16:23:18,581 INFO L87 Difference]: Start difference. First operand 31629 states and 75024 transitions. Second operand has 64 states, 64 states have (on average 2.265625) internal successors, (145), 63 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:23:34,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:23:34,614 INFO L93 Difference]: Finished difference Result 50046 states and 119428 transitions. [2022-03-15 16:23:34,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2022-03-15 16:23:34,615 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.265625) internal successors, (145), 63 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-03-15 16:23:34,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:23:34,698 INFO L225 Difference]: With dead ends: 50046 [2022-03-15 16:23:34,698 INFO L226 Difference]: Without dead ends: 50028 [2022-03-15 16:23:34,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15409 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=9978, Invalid=32252, Unknown=0, NotChecked=0, Total=42230 [2022-03-15 16:23:34,699 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 1173 mSDsluCounter, 1724 mSDsCounter, 0 mSdLazyCounter, 7514 mSolverCounterSat, 731 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1173 SdHoareTripleChecker+Valid, 874 SdHoareTripleChecker+Invalid, 8245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 731 IncrementalHoareTripleChecker+Valid, 7514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:23:34,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1173 Valid, 874 Invalid, 8245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [731 Valid, 7514 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-03-15 16:23:34,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50028 states. [2022-03-15 16:23:35,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50028 to 38544. [2022-03-15 16:23:35,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38544 states, 38543 states have (on average 2.3866850011675274) internal successors, (91990), 38543 states have internal predecessors, (91990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:23:35,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38544 states to 38544 states and 91990 transitions. [2022-03-15 16:23:35,508 INFO L78 Accepts]: Start accepts. Automaton has 38544 states and 91990 transitions. Word has length 55 [2022-03-15 16:23:35,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:23:35,508 INFO L470 AbstractCegarLoop]: Abstraction has 38544 states and 91990 transitions. [2022-03-15 16:23:35,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.265625) internal successors, (145), 63 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:23:35,508 INFO L276 IsEmpty]: Start isEmpty. Operand 38544 states and 91990 transitions. [2022-03-15 16:23:35,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-15 16:23:35,530 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:23:35,530 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:23:35,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-03-15 16:23:35,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-03-15 16:23:35,730 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:23:35,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:23:35,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1260759283, now seen corresponding path program 59 times [2022-03-15 16:23:35,731 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:23:35,731 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929192333] [2022-03-15 16:23:35,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:23:35,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:23:35,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:23:35,992 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 88 proven. 113 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-15 16:23:35,992 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:23:35,992 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929192333] [2022-03-15 16:23:35,992 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929192333] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:23:35,992 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771968841] [2022-03-15 16:23:35,992 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:23:35,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:23:35,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:23:35,994 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:23:35,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-15 16:23:36,029 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-03-15 16:23:36,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:23:36,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-15 16:23:36,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:23:36,704 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 56 proven. 146 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-15 16:23:36,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:23:38,400 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 64 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:23:38,401 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771968841] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:23:38,401 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:23:38,401 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 24, 26] total 63 [2022-03-15 16:23:38,401 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718558050] [2022-03-15 16:23:38,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:23:38,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-03-15 16:23:38,401 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:23:38,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-03-15 16:23:38,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=977, Invalid=3055, Unknown=0, NotChecked=0, Total=4032 [2022-03-15 16:23:38,402 INFO L87 Difference]: Start difference. First operand 38544 states and 91990 transitions. Second operand has 64 states, 64 states have (on average 2.28125) internal successors, (146), 63 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:23:54,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:23:54,435 INFO L93 Difference]: Finished difference Result 100699 states and 233716 transitions. [2022-03-15 16:23:54,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 247 states. [2022-03-15 16:23:54,435 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.28125) internal successors, (146), 63 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-03-15 16:23:54,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:23:54,652 INFO L225 Difference]: With dead ends: 100699 [2022-03-15 16:23:54,653 INFO L226 Difference]: Without dead ends: 100360 [2022-03-15 16:23:54,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 304 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48588 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=28862, Invalid=64468, Unknown=0, NotChecked=0, Total=93330 [2022-03-15 16:23:54,656 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 1349 mSDsluCounter, 1035 mSDsCounter, 0 mSdLazyCounter, 2823 mSolverCounterSat, 398 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1349 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 3221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 398 IncrementalHoareTripleChecker+Valid, 2823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:23:54,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1349 Valid, 559 Invalid, 3221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [398 Valid, 2823 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-15 16:23:54,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100360 states. [2022-03-15 16:23:55,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100360 to 50472. [2022-03-15 16:23:55,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50472 states, 50471 states have (on average 2.3793267420895168) internal successors, (120087), 50471 states have internal predecessors, (120087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:23:56,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50472 states to 50472 states and 120087 transitions. [2022-03-15 16:23:56,353 INFO L78 Accepts]: Start accepts. Automaton has 50472 states and 120087 transitions. Word has length 55 [2022-03-15 16:23:56,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:23:56,353 INFO L470 AbstractCegarLoop]: Abstraction has 50472 states and 120087 transitions. [2022-03-15 16:23:56,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.28125) internal successors, (146), 63 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:23:56,353 INFO L276 IsEmpty]: Start isEmpty. Operand 50472 states and 120087 transitions. [2022-03-15 16:23:56,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-15 16:23:56,387 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:23:56,387 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:23:56,403 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-03-15 16:23:56,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:23:56,588 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:23:56,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:23:56,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1501623287, now seen corresponding path program 60 times [2022-03-15 16:23:56,589 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:23:56,589 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491824168] [2022-03-15 16:23:56,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:23:56,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:23:56,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:23:56,852 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 72 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:23:56,852 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:23:56,852 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491824168] [2022-03-15 16:23:56,852 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491824168] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:23:56,852 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818172029] [2022-03-15 16:23:56,852 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:23:56,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:23:56,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:23:56,854 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:23:56,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-15 16:23:56,886 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-03-15 16:23:56,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:23:56,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-15 16:23:56,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:23:57,575 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 72 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:23:57,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:23:58,418 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 81 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:23:58,418 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818172029] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:23:58,418 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:23:58,418 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 71 [2022-03-15 16:23:58,418 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948713049] [2022-03-15 16:23:58,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:23:58,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-03-15 16:23:58,418 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:23:58,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-03-15 16:23:58,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=892, Invalid=4220, Unknown=0, NotChecked=0, Total=5112 [2022-03-15 16:23:58,419 INFO L87 Difference]: Start difference. First operand 50472 states and 120087 transitions. Second operand has 72 states, 72 states have (on average 2.125) internal successors, (153), 71 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:04,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:24:04,908 INFO L93 Difference]: Finished difference Result 64660 states and 150312 transitions. [2022-03-15 16:24:04,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 206 states. [2022-03-15 16:24:04,909 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.125) internal successors, (153), 71 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-03-15 16:24:04,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:24:05,091 INFO L225 Difference]: With dead ends: 64660 [2022-03-15 16:24:05,091 INFO L226 Difference]: Without dead ends: 63229 [2022-03-15 16:24:05,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 271 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28205 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=18014, Invalid=56242, Unknown=0, NotChecked=0, Total=74256 [2022-03-15 16:24:05,094 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1048 mSDsluCounter, 804 mSDsCounter, 0 mSdLazyCounter, 2383 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1048 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 2588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 2383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:24:05,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1048 Valid, 346 Invalid, 2588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 2383 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-15 16:24:05,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63229 states. [2022-03-15 16:24:05,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63229 to 49344. [2022-03-15 16:24:05,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49344 states, 49343 states have (on average 2.3726364428591693) internal successors, (117073), 49343 states have internal predecessors, (117073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:05,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49344 states to 49344 states and 117073 transitions. [2022-03-15 16:24:05,970 INFO L78 Accepts]: Start accepts. Automaton has 49344 states and 117073 transitions. Word has length 55 [2022-03-15 16:24:05,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:24:05,970 INFO L470 AbstractCegarLoop]: Abstraction has 49344 states and 117073 transitions. [2022-03-15 16:24:05,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.125) internal successors, (153), 71 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:05,970 INFO L276 IsEmpty]: Start isEmpty. Operand 49344 states and 117073 transitions. [2022-03-15 16:24:06,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-15 16:24:06,005 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:24:06,005 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:24:06,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-03-15 16:24:06,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:24:06,206 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:24:06,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:24:06,207 INFO L85 PathProgramCache]: Analyzing trace with hash -723932607, now seen corresponding path program 61 times [2022-03-15 16:24:06,207 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:24:06,207 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647745364] [2022-03-15 16:24:06,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:24:06,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:24:06,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:24:06,373 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 83 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:06,373 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:24:06,373 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647745364] [2022-03-15 16:24:06,374 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647745364] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:24:06,374 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553528373] [2022-03-15 16:24:06,374 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:24:06,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:24:06,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:24:06,375 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:24:06,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-15 16:24:06,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:24:06,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-15 16:24:06,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:24:07,451 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 83 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:07,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:24:08,205 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 92 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:08,205 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553528373] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:24:08,205 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:24:08,205 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 26, 26] total 62 [2022-03-15 16:24:08,205 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10614432] [2022-03-15 16:24:08,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:24:08,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-03-15 16:24:08,206 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:24:08,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-03-15 16:24:08,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=3043, Unknown=0, NotChecked=0, Total=3906 [2022-03-15 16:24:08,206 INFO L87 Difference]: Start difference. First operand 49344 states and 117073 transitions. Second operand has 63 states, 63 states have (on average 2.3015873015873014) internal successors, (145), 62 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:15,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:24:15,509 INFO L93 Difference]: Finished difference Result 55285 states and 130122 transitions. [2022-03-15 16:24:15,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 244 states. [2022-03-15 16:24:15,509 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.3015873015873014) internal successors, (145), 62 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-03-15 16:24:15,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:24:15,604 INFO L225 Difference]: With dead ends: 55285 [2022-03-15 16:24:15,604 INFO L226 Difference]: Without dead ends: 55281 [2022-03-15 16:24:15,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 300 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36086 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=22587, Invalid=68315, Unknown=0, NotChecked=0, Total=90902 [2022-03-15 16:24:15,607 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 610 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 1780 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 610 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 1976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 1780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:24:15,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [610 Valid, 198 Invalid, 1976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 1780 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 16:24:15,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55281 states. [2022-03-15 16:24:16,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55281 to 47161. [2022-03-15 16:24:16,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47161 states, 47160 states have (on average 2.378668363019508) internal successors, (112178), 47160 states have internal predecessors, (112178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:16,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47161 states to 47161 states and 112178 transitions. [2022-03-15 16:24:16,414 INFO L78 Accepts]: Start accepts. Automaton has 47161 states and 112178 transitions. Word has length 55 [2022-03-15 16:24:16,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:24:16,414 INFO L470 AbstractCegarLoop]: Abstraction has 47161 states and 112178 transitions. [2022-03-15 16:24:16,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.3015873015873014) internal successors, (145), 62 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:16,414 INFO L276 IsEmpty]: Start isEmpty. Operand 47161 states and 112178 transitions. [2022-03-15 16:24:16,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-15 16:24:16,448 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:24:16,449 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:24:16,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-03-15 16:24:16,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:24:16,664 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:24:16,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:24:16,664 INFO L85 PathProgramCache]: Analyzing trace with hash 554537791, now seen corresponding path program 62 times [2022-03-15 16:24:16,664 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:24:16,664 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135968832] [2022-03-15 16:24:16,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:24:16,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:24:16,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:24:16,910 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:16,910 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:24:16,910 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135968832] [2022-03-15 16:24:16,910 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135968832] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:24:16,910 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77156708] [2022-03-15 16:24:16,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:24:16,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:24:16,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:24:16,911 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:24:16,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-15 16:24:16,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:24:16,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:24:16,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-15 16:24:16,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:24:17,637 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:17,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:24:18,764 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 110 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:18,764 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77156708] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:24:18,764 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:24:18,765 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27, 26] total 72 [2022-03-15 16:24:18,765 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309924100] [2022-03-15 16:24:18,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:24:18,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-03-15 16:24:18,765 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:24:18,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-03-15 16:24:18,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=983, Invalid=4273, Unknown=0, NotChecked=0, Total=5256 [2022-03-15 16:24:18,766 INFO L87 Difference]: Start difference. First operand 47161 states and 112178 transitions. Second operand has 73 states, 73 states have (on average 2.164383561643836) internal successors, (158), 72 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:26,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:24:26,513 INFO L93 Difference]: Finished difference Result 54370 states and 127195 transitions. [2022-03-15 16:24:26,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 239 states. [2022-03-15 16:24:26,514 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.164383561643836) internal successors, (158), 72 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-03-15 16:24:26,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:24:26,602 INFO L225 Difference]: With dead ends: 54370 [2022-03-15 16:24:26,602 INFO L226 Difference]: Without dead ends: 53353 [2022-03-15 16:24:26,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 305 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36195 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=22845, Invalid=71097, Unknown=0, NotChecked=0, Total=93942 [2022-03-15 16:24:26,605 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1076 mSDsluCounter, 804 mSDsCounter, 0 mSdLazyCounter, 2461 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1076 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 2637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 2461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:24:26,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1076 Valid, 357 Invalid, 2637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 2461 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-15 16:24:26,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53353 states. [2022-03-15 16:24:27,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53353 to 48435. [2022-03-15 16:24:27,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48435 states, 48434 states have (on average 2.3723004500970393) internal successors, (114900), 48434 states have internal predecessors, (114900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:27,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48435 states to 48435 states and 114900 transitions. [2022-03-15 16:24:27,413 INFO L78 Accepts]: Start accepts. Automaton has 48435 states and 114900 transitions. Word has length 57 [2022-03-15 16:24:27,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:24:27,414 INFO L470 AbstractCegarLoop]: Abstraction has 48435 states and 114900 transitions. [2022-03-15 16:24:27,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.164383561643836) internal successors, (158), 72 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:27,414 INFO L276 IsEmpty]: Start isEmpty. Operand 48435 states and 114900 transitions. [2022-03-15 16:24:27,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-15 16:24:27,449 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:24:27,449 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:24:27,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-03-15 16:24:27,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:24:27,649 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:24:27,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:24:27,650 INFO L85 PathProgramCache]: Analyzing trace with hash -880443627, now seen corresponding path program 63 times [2022-03-15 16:24:27,650 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:24:27,650 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37825022] [2022-03-15 16:24:27,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:24:27,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:24:27,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:24:27,809 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 111 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:27,810 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:24:27,810 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37825022] [2022-03-15 16:24:27,810 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37825022] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:24:27,810 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540921827] [2022-03-15 16:24:27,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:24:27,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:24:27,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:24:27,811 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:24:27,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-15 16:24:27,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2022-03-15 16:24:27,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:24:27,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 62 conjunts are in the unsatisfiable core [2022-03-15 16:24:27,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:24:28,649 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 21 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:28,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:24:30,322 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 31 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:30,323 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540921827] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:24:30,323 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:24:30,323 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 27, 27] total 63 [2022-03-15 16:24:30,323 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690479918] [2022-03-15 16:24:30,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:24:30,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-03-15 16:24:30,323 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:24:30,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-03-15 16:24:30,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=852, Invalid=3180, Unknown=0, NotChecked=0, Total=4032 [2022-03-15 16:24:30,324 INFO L87 Difference]: Start difference. First operand 48435 states and 114900 transitions. Second operand has 64 states, 64 states have (on average 2.359375) internal successors, (151), 63 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:39,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:24:39,880 INFO L93 Difference]: Finished difference Result 53965 states and 126890 transitions. [2022-03-15 16:24:39,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 267 states. [2022-03-15 16:24:39,880 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.359375) internal successors, (151), 63 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-03-15 16:24:39,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:24:39,973 INFO L225 Difference]: With dead ends: 53965 [2022-03-15 16:24:39,973 INFO L226 Difference]: Without dead ends: 53961 [2022-03-15 16:24:39,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 324 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43971 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=26436, Invalid=79514, Unknown=0, NotChecked=0, Total=105950 [2022-03-15 16:24:39,977 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 987 mSDsluCounter, 972 mSDsCounter, 0 mSdLazyCounter, 2832 mSolverCounterSat, 358 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 987 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 3190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 358 IncrementalHoareTripleChecker+Valid, 2832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:24:39,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [987 Valid, 524 Invalid, 3190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [358 Valid, 2832 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-15 16:24:40,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53961 states. [2022-03-15 16:24:40,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53961 to 49427. [2022-03-15 16:24:40,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49427 states, 49426 states have (on average 2.379921498806296) internal successors, (117630), 49426 states have internal predecessors, (117630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:40,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49427 states to 49427 states and 117630 transitions. [2022-03-15 16:24:40,847 INFO L78 Accepts]: Start accepts. Automaton has 49427 states and 117630 transitions. Word has length 57 [2022-03-15 16:24:40,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:24:40,847 INFO L470 AbstractCegarLoop]: Abstraction has 49427 states and 117630 transitions. [2022-03-15 16:24:40,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.359375) internal successors, (151), 63 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:40,848 INFO L276 IsEmpty]: Start isEmpty. Operand 49427 states and 117630 transitions. [2022-03-15 16:24:40,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-15 16:24:40,883 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:24:40,883 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:24:40,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-03-15 16:24:41,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-03-15 16:24:41,084 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:24:41,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:24:41,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1275848881, now seen corresponding path program 64 times [2022-03-15 16:24:41,084 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:24:41,084 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824124589] [2022-03-15 16:24:41,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:24:41,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:24:41,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:24:41,272 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 89 proven. 127 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-15 16:24:41,272 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:24:41,272 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824124589] [2022-03-15 16:24:41,272 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824124589] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:24:41,272 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212452318] [2022-03-15 16:24:41,272 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:24:41,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:24:41,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:24:41,273 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:24:41,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-15 16:24:41,303 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:24:41,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:24:41,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-15 16:24:41,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:24:42,018 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 56 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:42,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:24:43,339 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 72 proven. 149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:43,340 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212452318] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:24:43,340 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:24:43,340 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 26, 28] total 71 [2022-03-15 16:24:43,340 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62886234] [2022-03-15 16:24:43,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:24:43,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-03-15 16:24:43,340 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:24:43,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-03-15 16:24:43,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=880, Invalid=4232, Unknown=0, NotChecked=0, Total=5112 [2022-03-15 16:24:43,341 INFO L87 Difference]: Start difference. First operand 49427 states and 117630 transitions. Second operand has 72 states, 72 states have (on average 2.1805555555555554) internal successors, (157), 71 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:53,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:24:53,853 INFO L93 Difference]: Finished difference Result 108881 states and 250108 transitions. [2022-03-15 16:24:53,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 259 states. [2022-03-15 16:24:53,853 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.1805555555555554) internal successors, (157), 71 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-03-15 16:24:53,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:24:54,065 INFO L225 Difference]: With dead ends: 108881 [2022-03-15 16:24:54,066 INFO L226 Difference]: Without dead ends: 107609 [2022-03-15 16:24:54,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 324 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44491 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=25610, Invalid=80340, Unknown=0, NotChecked=0, Total=105950 [2022-03-15 16:24:54,069 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1375 mSDsluCounter, 934 mSDsCounter, 0 mSdLazyCounter, 3254 mSolverCounterSat, 551 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1375 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 3805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 551 IncrementalHoareTripleChecker+Valid, 3254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:24:54,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1375 Valid, 453 Invalid, 3805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [551 Valid, 3254 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-15 16:24:54,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107609 states. [2022-03-15 16:24:55,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107609 to 50931. [2022-03-15 16:24:55,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50931 states, 50930 states have (on average 2.381170233654035) internal successors, (121273), 50930 states have internal predecessors, (121273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:55,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50931 states to 50931 states and 121273 transitions. [2022-03-15 16:24:55,390 INFO L78 Accepts]: Start accepts. Automaton has 50931 states and 121273 transitions. Word has length 57 [2022-03-15 16:24:55,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:24:55,390 INFO L470 AbstractCegarLoop]: Abstraction has 50931 states and 121273 transitions. [2022-03-15 16:24:55,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.1805555555555554) internal successors, (157), 71 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:55,391 INFO L276 IsEmpty]: Start isEmpty. Operand 50931 states and 121273 transitions. [2022-03-15 16:24:55,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-15 16:24:55,428 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:24:55,428 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:24:55,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-03-15 16:24:55,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:24:55,628 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:24:55,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:24:55,629 INFO L85 PathProgramCache]: Analyzing trace with hash 38084029, now seen corresponding path program 65 times [2022-03-15 16:24:55,629 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:24:55,629 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028372475] [2022-03-15 16:24:55,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:24:55,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:24:55,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:24:55,783 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 98 proven. 113 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-15 16:24:55,783 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:24:55,783 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028372475] [2022-03-15 16:24:55,783 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028372475] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:24:55,784 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173614119] [2022-03-15 16:24:55,784 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:24:55,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:24:55,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:24:55,785 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:24:55,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-15 16:24:55,820 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-03-15 16:24:55,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:24:55,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-15 16:24:55,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:24:56,661 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 49 proven. 170 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:24:56,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:24:58,028 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 49 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:58,028 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173614119] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:24:58,028 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:24:58,029 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 26, 27] total 66 [2022-03-15 16:24:58,029 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831322414] [2022-03-15 16:24:58,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:24:58,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-03-15 16:24:58,029 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:24:58,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-03-15 16:24:58,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=794, Invalid=3628, Unknown=0, NotChecked=0, Total=4422 [2022-03-15 16:24:58,030 INFO L87 Difference]: Start difference. First operand 50931 states and 121273 transitions. Second operand has 67 states, 67 states have (on average 2.283582089552239) internal successors, (153), 66 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:25:06,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:25:06,417 INFO L93 Difference]: Finished difference Result 144989 states and 332330 transitions. [2022-03-15 16:25:06,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 210 states. [2022-03-15 16:25:06,417 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.283582089552239) internal successors, (153), 66 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-03-15 16:25:06,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:25:06,752 INFO L225 Difference]: With dead ends: 144989 [2022-03-15 16:25:06,752 INFO L226 Difference]: Without dead ends: 144515 [2022-03-15 16:25:06,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 270 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31249 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=18217, Invalid=55495, Unknown=0, NotChecked=0, Total=73712 [2022-03-15 16:25:06,754 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 900 mSDsluCounter, 1338 mSDsCounter, 0 mSdLazyCounter, 3460 mSolverCounterSat, 311 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 900 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 3771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 311 IncrementalHoareTripleChecker+Valid, 3460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:25:06,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [900 Valid, 697 Invalid, 3771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [311 Valid, 3460 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-15 16:25:06,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144515 states. [2022-03-15 16:25:08,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144515 to 55928. [2022-03-15 16:25:08,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55928 states, 55927 states have (on average 2.371037244980063) internal successors, (132605), 55927 states have internal predecessors, (132605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:25:09,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55928 states to 55928 states and 132605 transitions. [2022-03-15 16:25:09,044 INFO L78 Accepts]: Start accepts. Automaton has 55928 states and 132605 transitions. Word has length 57 [2022-03-15 16:25:09,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:25:09,044 INFO L470 AbstractCegarLoop]: Abstraction has 55928 states and 132605 transitions. [2022-03-15 16:25:09,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.283582089552239) internal successors, (153), 66 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:25:09,044 INFO L276 IsEmpty]: Start isEmpty. Operand 55928 states and 132605 transitions. [2022-03-15 16:25:09,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-15 16:25:09,089 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:25:09,089 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:25:09,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-03-15 16:25:09,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-03-15 16:25:09,289 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:25:09,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:25:09,290 INFO L85 PathProgramCache]: Analyzing trace with hash -588351939, now seen corresponding path program 66 times [2022-03-15 16:25:09,290 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:25:09,290 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123126284] [2022-03-15 16:25:09,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:25:09,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:25:09,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:25:09,448 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 1 proven. 241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:25:09,449 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:25:09,449 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123126284] [2022-03-15 16:25:09,449 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123126284] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:25:09,449 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804107394] [2022-03-15 16:25:09,449 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:25:09,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:25:09,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:25:09,450 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:25:09,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-15 16:25:09,490 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-03-15 16:25:09,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:25:09,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-15 16:25:09,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:25:09,796 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 64 proven. 178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:25:09,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:25:10,082 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 100 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:25:10,082 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804107394] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:25:10,082 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:25:10,082 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 24, 17] total 31 [2022-03-15 16:25:10,082 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092865770] [2022-03-15 16:25:10,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:25:10,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:25:10,083 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:25:10,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:25:10,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=683, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:25:10,083 INFO L87 Difference]: Start difference. First operand 55928 states and 132605 transitions. Second operand has 31 states, 31 states have (on average 3.7419354838709675) internal successors, (116), 31 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:25:10,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:25:10,996 INFO L93 Difference]: Finished difference Result 75481 states and 180975 transitions. [2022-03-15 16:25:10,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 16:25:10,996 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.7419354838709675) internal successors, (116), 31 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-03-15 16:25:10,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:25:11,143 INFO L225 Difference]: With dead ends: 75481 [2022-03-15 16:25:11,143 INFO L226 Difference]: Without dead ends: 75387 [2022-03-15 16:25:11,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 108 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=400, Invalid=1492, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 16:25:11,143 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 325 mSDsluCounter, 2011 mSDsCounter, 0 mSdLazyCounter, 1467 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 1539 SdHoareTripleChecker+Invalid, 1530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:25:11,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 1539 Invalid, 1530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1467 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:25:11,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75387 states. [2022-03-15 16:25:12,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75387 to 66341. [2022-03-15 16:25:12,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66341 states, 66340 states have (on average 2.39784443774495) internal successors, (159073), 66340 states have internal predecessors, (159073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:25:12,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66341 states to 66341 states and 159073 transitions. [2022-03-15 16:25:12,636 INFO L78 Accepts]: Start accepts. Automaton has 66341 states and 159073 transitions. Word has length 59 [2022-03-15 16:25:12,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:25:12,636 INFO L470 AbstractCegarLoop]: Abstraction has 66341 states and 159073 transitions. [2022-03-15 16:25:12,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.7419354838709675) internal successors, (116), 31 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:25:12,636 INFO L276 IsEmpty]: Start isEmpty. Operand 66341 states and 159073 transitions. [2022-03-15 16:25:12,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-15 16:25:12,687 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:25:12,687 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:25:12,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-03-15 16:25:12,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-03-15 16:25:12,887 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:25:12,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:25:12,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1987137683, now seen corresponding path program 67 times [2022-03-15 16:25:12,888 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:25:12,888 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472023081] [2022-03-15 16:25:12,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:25:12,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:25:12,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:25:13,358 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:25:13,358 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:25:13,358 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472023081] [2022-03-15 16:25:13,358 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472023081] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:25:13,359 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351842757] [2022-03-15 16:25:13,359 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:25:13,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:25:13,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:25:13,360 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:25:13,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-15 16:25:13,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:25:13,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 64 conjunts are in the unsatisfiable core [2022-03-15 16:25:13,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:25:14,211 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:25:14,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:25:18,454 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 2 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:25:18,454 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351842757] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:25:18,454 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:25:18,454 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 27, 28] total 68 [2022-03-15 16:25:18,454 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418116944] [2022-03-15 16:25:18,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:25:18,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-03-15 16:25:18,455 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:25:18,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-03-15 16:25:18,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=987, Invalid=3705, Unknown=0, NotChecked=0, Total=4692 [2022-03-15 16:25:18,455 INFO L87 Difference]: Start difference. First operand 66341 states and 159073 transitions. Second operand has 69 states, 69 states have (on average 2.3768115942028984) internal successors, (164), 68 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:25:45,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:25:45,443 INFO L93 Difference]: Finished difference Result 117063 states and 276942 transitions. [2022-03-15 16:25:45,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 213 states. [2022-03-15 16:25:45,444 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.3768115942028984) internal successors, (164), 68 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-03-15 16:25:45,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:25:45,689 INFO L225 Difference]: With dead ends: 117063 [2022-03-15 16:25:45,689 INFO L226 Difference]: Without dead ends: 117021 [2022-03-15 16:25:45,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29336 ImplicationChecksByTransitivity, 23.4s TimeCoverageRelationStatistics Valid=14373, Invalid=62079, Unknown=0, NotChecked=0, Total=76452 [2022-03-15 16:25:45,691 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 1857 mSDsluCounter, 3915 mSDsCounter, 0 mSdLazyCounter, 12992 mSolverCounterSat, 953 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1857 SdHoareTripleChecker+Valid, 2108 SdHoareTripleChecker+Invalid, 13945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 953 IncrementalHoareTripleChecker+Valid, 12992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:25:45,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1857 Valid, 2108 Invalid, 13945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [953 Valid, 12992 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-03-15 16:25:45,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117021 states. [2022-03-15 16:25:47,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117021 to 81290. [2022-03-15 16:25:47,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81290 states, 81289 states have (on average 2.4182361697154597) internal successors, (196576), 81289 states have internal predecessors, (196576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:25:47,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81290 states to 81290 states and 196576 transitions. [2022-03-15 16:25:47,572 INFO L78 Accepts]: Start accepts. Automaton has 81290 states and 196576 transitions. Word has length 59 [2022-03-15 16:25:47,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:25:47,572 INFO L470 AbstractCegarLoop]: Abstraction has 81290 states and 196576 transitions. [2022-03-15 16:25:47,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.3768115942028984) internal successors, (164), 68 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:25:47,573 INFO L276 IsEmpty]: Start isEmpty. Operand 81290 states and 196576 transitions. [2022-03-15 16:25:47,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-15 16:25:47,627 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:25:47,627 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:25:47,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-03-15 16:25:47,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-03-15 16:25:47,827 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:25:47,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:25:47,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1256771773, now seen corresponding path program 68 times [2022-03-15 16:25:47,828 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:25:47,828 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711652107] [2022-03-15 16:25:47,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:25:47,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:25:47,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:25:48,106 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 21 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:25:48,106 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:25:48,106 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711652107] [2022-03-15 16:25:48,107 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711652107] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:25:48,107 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897861133] [2022-03-15 16:25:48,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:25:48,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:25:48,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:25:48,108 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:25:48,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-15 16:25:48,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:25:48,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:25:48,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 64 conjunts are in the unsatisfiable core [2022-03-15 16:25:48,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:25:48,985 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 21 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:25:48,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:25:53,905 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 31 proven. 211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:25:53,905 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897861133] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:25:53,905 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:25:53,905 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 28, 28] total 68 [2022-03-15 16:25:53,906 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882586787] [2022-03-15 16:25:53,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:25:53,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-03-15 16:25:53,906 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:25:53,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-03-15 16:25:53,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1098, Invalid=3594, Unknown=0, NotChecked=0, Total=4692 [2022-03-15 16:25:53,906 INFO L87 Difference]: Start difference. First operand 81290 states and 196576 transitions. Second operand has 69 states, 69 states have (on average 2.2753623188405796) internal successors, (157), 68 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:26:14,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:26:14,231 INFO L93 Difference]: Finished difference Result 94724 states and 228861 transitions. [2022-03-15 16:26:14,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2022-03-15 16:26:14,232 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.2753623188405796) internal successors, (157), 68 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-03-15 16:26:14,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:26:14,547 INFO L225 Difference]: With dead ends: 94724 [2022-03-15 16:26:14,547 INFO L226 Difference]: Without dead ends: 94704 [2022-03-15 16:26:14,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18272 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=11684, Invalid=37822, Unknown=0, NotChecked=0, Total=49506 [2022-03-15 16:26:14,550 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 1386 mSDsluCounter, 2078 mSDsCounter, 0 mSdLazyCounter, 8907 mSolverCounterSat, 829 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1386 SdHoareTripleChecker+Valid, 1017 SdHoareTripleChecker+Invalid, 9736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 829 IncrementalHoareTripleChecker+Valid, 8907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:26:14,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1386 Valid, 1017 Invalid, 9736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [829 Valid, 8907 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-03-15 16:26:14,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94704 states. [2022-03-15 16:26:15,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94704 to 67532. [2022-03-15 16:26:15,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67532 states, 67531 states have (on average 2.406183826687003) internal successors, (162492), 67531 states have internal predecessors, (162492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:26:16,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67532 states to 67532 states and 162492 transitions. [2022-03-15 16:26:16,165 INFO L78 Accepts]: Start accepts. Automaton has 67532 states and 162492 transitions. Word has length 59 [2022-03-15 16:26:16,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:26:16,165 INFO L470 AbstractCegarLoop]: Abstraction has 67532 states and 162492 transitions. [2022-03-15 16:26:16,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.2753623188405796) internal successors, (157), 68 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:26:16,165 INFO L276 IsEmpty]: Start isEmpty. Operand 67532 states and 162492 transitions. [2022-03-15 16:26:16,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-15 16:26:16,215 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:26:16,215 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:26:16,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-03-15 16:26:16,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-03-15 16:26:16,417 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:26:16,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:26:16,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1300336407, now seen corresponding path program 69 times [2022-03-15 16:26:16,418 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:26:16,418 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328748862] [2022-03-15 16:26:16,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:26:16,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:26:16,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:26:16,696 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 2 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:26:16,696 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:26:16,696 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328748862] [2022-03-15 16:26:16,696 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328748862] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:26:16,696 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613347362] [2022-03-15 16:26:16,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:26:16,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:26:16,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:26:16,697 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:26:16,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-15 16:26:16,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-03-15 16:26:16,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:26:16,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-15 16:26:16,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:26:17,538 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 2 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:26:17,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:26:21,541 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 6 proven. 236 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:26:21,541 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613347362] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:26:21,541 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:26:21,542 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 27, 28] total 69 [2022-03-15 16:26:21,542 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373382540] [2022-03-15 16:26:21,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:26:21,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-03-15 16:26:21,542 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:26:21,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-03-15 16:26:21,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=926, Invalid=3904, Unknown=0, NotChecked=0, Total=4830 [2022-03-15 16:26:21,543 INFO L87 Difference]: Start difference. First operand 67532 states and 162492 transitions. Second operand has 70 states, 70 states have (on average 2.3142857142857145) internal successors, (162), 69 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:26:53,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:26:53,562 INFO L93 Difference]: Finished difference Result 132124 states and 311334 transitions. [2022-03-15 16:26:53,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 277 states. [2022-03-15 16:26:53,562 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.3142857142857145) internal successors, (162), 69 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-03-15 16:26:53,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:26:53,888 INFO L225 Difference]: With dead ends: 132124 [2022-03-15 16:26:53,888 INFO L226 Difference]: Without dead ends: 132043 [2022-03-15 16:26:53,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 340 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47946 ImplicationChecksByTransitivity, 28.3s TimeCoverageRelationStatistics Valid=22207, Invalid=94415, Unknown=0, NotChecked=0, Total=116622 [2022-03-15 16:26:53,891 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 1981 mSDsluCounter, 2210 mSDsCounter, 0 mSdLazyCounter, 10770 mSolverCounterSat, 1053 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1981 SdHoareTripleChecker+Valid, 1101 SdHoareTripleChecker+Invalid, 11823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1053 IncrementalHoareTripleChecker+Valid, 10770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:26:53,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1981 Valid, 1101 Invalid, 11823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1053 Valid, 10770 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-03-15 16:26:54,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132043 states. [2022-03-15 16:26:55,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132043 to 82340. [2022-03-15 16:26:55,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82340 states, 82339 states have (on average 2.4267843913576796) internal successors, (199819), 82339 states have internal predecessors, (199819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:26:56,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82340 states to 82340 states and 199819 transitions. [2022-03-15 16:26:56,128 INFO L78 Accepts]: Start accepts. Automaton has 82340 states and 199819 transitions. Word has length 59 [2022-03-15 16:26:56,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:26:56,128 INFO L470 AbstractCegarLoop]: Abstraction has 82340 states and 199819 transitions. [2022-03-15 16:26:56,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.3142857142857145) internal successors, (162), 69 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:26:56,128 INFO L276 IsEmpty]: Start isEmpty. Operand 82340 states and 199819 transitions. [2022-03-15 16:26:56,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-15 16:26:56,189 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:26:56,189 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:26:56,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-03-15 16:26:56,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:26:56,389 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:26:56,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:26:56,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1468394253, now seen corresponding path program 70 times [2022-03-15 16:26:56,390 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:26:56,390 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592283266] [2022-03-15 16:26:56,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:26:56,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:26:56,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:26:56,537 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 81 proven. 152 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-15 16:26:56,537 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:26:56,537 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592283266] [2022-03-15 16:26:56,537 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592283266] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:26:56,537 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158564124] [2022-03-15 16:26:56,537 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:26:56,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:26:56,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:26:56,539 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:26:56,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-15 16:26:56,568 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:26:56,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:26:56,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-15 16:26:56,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:26:57,230 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 56 proven. 176 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-15 16:26:57,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:26:59,590 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 72 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:26:59,591 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158564124] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:26:59,591 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:26:59,591 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 24, 29] total 66 [2022-03-15 16:26:59,591 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966666149] [2022-03-15 16:26:59,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:26:59,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-03-15 16:26:59,591 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:26:59,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-03-15 16:26:59,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=950, Invalid=3472, Unknown=0, NotChecked=0, Total=4422 [2022-03-15 16:26:59,592 INFO L87 Difference]: Start difference. First operand 82340 states and 199819 transitions. Second operand has 67 states, 67 states have (on average 2.328358208955224) internal successors, (156), 66 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:27:21,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:27:21,148 INFO L93 Difference]: Finished difference Result 215111 states and 512154 transitions. [2022-03-15 16:27:21,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 279 states. [2022-03-15 16:27:21,149 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.328358208955224) internal successors, (156), 66 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-03-15 16:27:21,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:27:21,785 INFO L225 Difference]: With dead ends: 215111 [2022-03-15 16:27:21,785 INFO L226 Difference]: Without dead ends: 214588 [2022-03-15 16:27:21,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 339 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57235 ImplicationChecksByTransitivity, 19.5s TimeCoverageRelationStatistics Valid=31204, Invalid=84736, Unknown=0, NotChecked=0, Total=115940 [2022-03-15 16:27:21,791 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 1888 mSDsluCounter, 1313 mSDsCounter, 0 mSdLazyCounter, 3374 mSolverCounterSat, 526 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1888 SdHoareTripleChecker+Valid, 746 SdHoareTripleChecker+Invalid, 3900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 526 IncrementalHoareTripleChecker+Valid, 3374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:27:21,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1888 Valid, 746 Invalid, 3900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [526 Valid, 3374 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-15 16:27:22,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214588 states. [2022-03-15 16:27:25,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214588 to 129224. [2022-03-15 16:27:25,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129224 states, 129223 states have (on average 2.422873637046037) internal successors, (313091), 129223 states have internal predecessors, (313091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:27:26,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129224 states to 129224 states and 313091 transitions. [2022-03-15 16:27:26,243 INFO L78 Accepts]: Start accepts. Automaton has 129224 states and 313091 transitions. Word has length 59 [2022-03-15 16:27:26,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:27:26,243 INFO L470 AbstractCegarLoop]: Abstraction has 129224 states and 313091 transitions. [2022-03-15 16:27:26,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.328358208955224) internal successors, (156), 66 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:27:26,243 INFO L276 IsEmpty]: Start isEmpty. Operand 129224 states and 313091 transitions. [2022-03-15 16:27:26,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-15 16:27:26,330 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:27:26,330 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:27:26,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-03-15 16:27:26,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:27:26,530 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:27:26,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:27:26,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1511239347, now seen corresponding path program 71 times [2022-03-15 16:27:26,531 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:27:26,531 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30787344] [2022-03-15 16:27:26,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:27:26,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:27:26,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:27:26,937 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 56 proven. 182 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 16:27:26,937 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:27:26,937 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30787344] [2022-03-15 16:27:26,937 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30787344] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:27:26,937 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634322650] [2022-03-15 16:27:26,937 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:27:26,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:27:26,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:27:26,938 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:27:26,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-15 16:27:26,971 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-03-15 16:27:26,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:27:26,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-15 16:27:26,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:27:27,718 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 56 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:27:27,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:27:28,886 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 64 proven. 178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:27:28,886 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634322650] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:27:28,886 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:27:28,886 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 28, 28] total 75 [2022-03-15 16:27:28,886 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512851784] [2022-03-15 16:27:28,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:27:28,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-03-15 16:27:28,887 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:27:28,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-03-15 16:27:28,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=897, Invalid=4803, Unknown=0, NotChecked=0, Total=5700 [2022-03-15 16:27:28,887 INFO L87 Difference]: Start difference. First operand 129224 states and 313091 transitions. Second operand has 76 states, 76 states have (on average 2.1315789473684212) internal successors, (162), 75 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:27:38,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:27:38,428 INFO L93 Difference]: Finished difference Result 233874 states and 555428 transitions. [2022-03-15 16:27:38,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 247 states. [2022-03-15 16:27:38,428 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.1315789473684212) internal successors, (162), 75 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-03-15 16:27:38,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:27:39,299 INFO L225 Difference]: With dead ends: 233874 [2022-03-15 16:27:39,300 INFO L226 Difference]: Without dead ends: 232080 [2022-03-15 16:27:39,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 316 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40179 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=21412, Invalid=79394, Unknown=0, NotChecked=0, Total=100806 [2022-03-15 16:27:39,303 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1186 mSDsluCounter, 1002 mSDsCounter, 0 mSdLazyCounter, 3513 mSolverCounterSat, 363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1186 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 3876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 363 IncrementalHoareTripleChecker+Valid, 3513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:27:39,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1186 Valid, 430 Invalid, 3876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [363 Valid, 3513 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-15 16:27:39,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232080 states. [2022-03-15 16:27:42,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232080 to 119339. [2022-03-15 16:27:42,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119339 states, 119338 states have (on average 2.4176540582211867) internal successors, (288518), 119338 states have internal predecessors, (288518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:27:43,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119339 states to 119339 states and 288518 transitions. [2022-03-15 16:27:43,079 INFO L78 Accepts]: Start accepts. Automaton has 119339 states and 288518 transitions. Word has length 59 [2022-03-15 16:27:43,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:27:43,079 INFO L470 AbstractCegarLoop]: Abstraction has 119339 states and 288518 transitions. [2022-03-15 16:27:43,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.1315789473684212) internal successors, (162), 75 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:27:43,080 INFO L276 IsEmpty]: Start isEmpty. Operand 119339 states and 288518 transitions. [2022-03-15 16:27:43,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-15 16:27:43,169 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:27:43,169 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:27:43,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-03-15 16:27:43,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:27:43,369 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:27:43,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:27:43,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1565601971, now seen corresponding path program 72 times [2022-03-15 16:27:43,370 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:27:43,370 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448110810] [2022-03-15 16:27:43,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:27:43,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:27:43,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:27:43,825 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 72 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:27:43,825 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:27:43,825 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448110810] [2022-03-15 16:27:43,825 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448110810] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:27:43,825 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368783200] [2022-03-15 16:27:43,825 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:27:43,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:27:43,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:27:43,826 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:27:43,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-15 16:27:43,861 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-03-15 16:27:43,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:27:43,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 16:27:43,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:27:44,617 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 72 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:27:44,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:27:45,669 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 81 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:27:45,670 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368783200] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:27:45,670 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:27:45,670 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 77 [2022-03-15 16:27:45,670 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584795517] [2022-03-15 16:27:45,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:27:45,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-03-15 16:27:45,670 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:27:45,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-03-15 16:27:45,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=968, Invalid=5038, Unknown=0, NotChecked=0, Total=6006 [2022-03-15 16:27:45,671 INFO L87 Difference]: Start difference. First operand 119339 states and 288518 transitions. Second operand has 78 states, 78 states have (on average 2.1153846153846154) internal successors, (165), 77 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:27:55,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:27:55,126 INFO L93 Difference]: Finished difference Result 158204 states and 376205 transitions. [2022-03-15 16:27:55,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 257 states. [2022-03-15 16:27:55,126 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.1153846153846154) internal successors, (165), 77 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-03-15 16:27:55,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:27:55,612 INFO L225 Difference]: With dead ends: 158204 [2022-03-15 16:27:55,612 INFO L226 Difference]: Without dead ends: 156650 [2022-03-15 16:27:55,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 328 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43255 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=23503, Invalid=85067, Unknown=0, NotChecked=0, Total=108570 [2022-03-15 16:27:55,616 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1118 mSDsluCounter, 1093 mSDsCounter, 0 mSdLazyCounter, 3540 mSolverCounterSat, 313 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1118 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 3853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 313 IncrementalHoareTripleChecker+Valid, 3540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:27:55,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1118 Valid, 462 Invalid, 3853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [313 Valid, 3540 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-15 16:27:55,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156650 states. [2022-03-15 16:27:57,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156650 to 109578. [2022-03-15 16:27:58,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109578 states, 109577 states have (on average 2.4051306387289304) internal successors, (263547), 109577 states have internal predecessors, (263547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:27:58,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109578 states to 109578 states and 263547 transitions. [2022-03-15 16:27:58,549 INFO L78 Accepts]: Start accepts. Automaton has 109578 states and 263547 transitions. Word has length 59 [2022-03-15 16:27:58,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:27:58,549 INFO L470 AbstractCegarLoop]: Abstraction has 109578 states and 263547 transitions. [2022-03-15 16:27:58,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.1153846153846154) internal successors, (165), 77 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:27:58,550 INFO L276 IsEmpty]: Start isEmpty. Operand 109578 states and 263547 transitions. [2022-03-15 16:27:58,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-15 16:27:58,853 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:27:58,853 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:27:58,871 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-03-15 16:27:59,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2022-03-15 16:27:59,069 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:27:59,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:27:59,071 INFO L85 PathProgramCache]: Analyzing trace with hash 218506875, now seen corresponding path program 73 times [2022-03-15 16:27:59,071 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:27:59,071 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19462536] [2022-03-15 16:27:59,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:27:59,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:27:59,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:27:59,396 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:27:59,396 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:27:59,396 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19462536] [2022-03-15 16:27:59,396 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19462536] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:27:59,396 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190674391] [2022-03-15 16:27:59,396 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:27:59,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:27:59,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:27:59,397 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:27:59,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-15 16:27:59,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:27:59,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 50 conjunts are in the unsatisfiable core [2022-03-15 16:27:59,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:28:00,210 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:28:00,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:28:01,275 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 132 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:28:01,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190674391] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:28:01,276 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:28:01,276 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29, 28] total 78 [2022-03-15 16:28:01,276 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538456122] [2022-03-15 16:28:01,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:28:01,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-03-15 16:28:01,276 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:28:01,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-03-15 16:28:01,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1143, Invalid=5019, Unknown=0, NotChecked=0, Total=6162 [2022-03-15 16:28:01,277 INFO L87 Difference]: Start difference. First operand 109578 states and 263547 transitions. Second operand has 79 states, 79 states have (on average 2.151898734177215) internal successors, (170), 78 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:28:11,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:28:11,357 INFO L93 Difference]: Finished difference Result 115472 states and 275268 transitions. [2022-03-15 16:28:11,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 278 states. [2022-03-15 16:28:11,357 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.151898734177215) internal successors, (170), 78 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-03-15 16:28:11,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:28:11,620 INFO L225 Difference]: With dead ends: 115472 [2022-03-15 16:28:11,620 INFO L226 Difference]: Without dead ends: 114281 [2022-03-15 16:28:11,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 350 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48991 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=30076, Invalid=93476, Unknown=0, NotChecked=0, Total=123552 [2022-03-15 16:28:11,625 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1278 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 2531 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1278 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 2749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 2531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:28:11,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1278 Valid, 376 Invalid, 2749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 2531 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-15 16:28:11,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114281 states. [2022-03-15 16:28:13,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114281 to 109425. [2022-03-15 16:28:13,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109425 states, 109424 states have (on average 2.404646147097529) internal successors, (263126), 109424 states have internal predecessors, (263126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:28:14,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109425 states to 109425 states and 263126 transitions. [2022-03-15 16:28:14,152 INFO L78 Accepts]: Start accepts. Automaton has 109425 states and 263126 transitions. Word has length 61 [2022-03-15 16:28:14,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:28:14,152 INFO L470 AbstractCegarLoop]: Abstraction has 109425 states and 263126 transitions. [2022-03-15 16:28:14,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.151898734177215) internal successors, (170), 78 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:28:14,153 INFO L276 IsEmpty]: Start isEmpty. Operand 109425 states and 263126 transitions. [2022-03-15 16:28:14,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-15 16:28:14,412 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:28:14,412 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:28:14,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-03-15 16:28:14,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:28:14,612 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:28:14,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:28:14,613 INFO L85 PathProgramCache]: Analyzing trace with hash 970555797, now seen corresponding path program 74 times [2022-03-15 16:28:14,613 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:28:14,613 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470681809] [2022-03-15 16:28:14,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:28:14,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:28:14,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:28:14,779 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 133 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:28:14,779 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:28:14,779 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470681809] [2022-03-15 16:28:14,779 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470681809] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:28:14,779 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886119077] [2022-03-15 16:28:14,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:28:14,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:28:14,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:28:14,780 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:28:14,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-15 16:28:14,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:28:14,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:28:14,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-15 16:28:14,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:28:15,567 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 133 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:28:15,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:28:16,601 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 144 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:28:16,602 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886119077] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:28:16,602 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:28:16,602 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 28, 27] total 65 [2022-03-15 16:28:16,602 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990719636] [2022-03-15 16:28:16,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:28:16,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-03-15 16:28:16,602 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:28:16,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-03-15 16:28:16,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1025, Invalid=3265, Unknown=0, NotChecked=0, Total=4290 [2022-03-15 16:28:16,603 INFO L87 Difference]: Start difference. First operand 109425 states and 263126 transitions. Second operand has 66 states, 66 states have (on average 2.4545454545454546) internal successors, (162), 65 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:28:22,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:28:22,729 INFO L93 Difference]: Finished difference Result 111886 states and 268149 transitions. [2022-03-15 16:28:22,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 199 states. [2022-03-15 16:28:22,730 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.4545454545454546) internal successors, (162), 65 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-03-15 16:28:22,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:28:22,959 INFO L225 Difference]: With dead ends: 111886 [2022-03-15 16:28:22,959 INFO L226 Difference]: Without dead ends: 111882 [2022-03-15 16:28:22,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 258 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25401 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=17508, Invalid=49832, Unknown=0, NotChecked=0, Total=67340 [2022-03-15 16:28:22,961 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 523 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 1825 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 1929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:28:22,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [523 Valid, 192 Invalid, 1929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1825 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 16:28:23,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111882 states. [2022-03-15 16:28:24,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111882 to 109293. [2022-03-15 16:28:24,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109293 states, 109292 states have (on average 2.405107418658273) internal successors, (262859), 109292 states have internal predecessors, (262859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:28:25,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109293 states to 109293 states and 262859 transitions. [2022-03-15 16:28:25,389 INFO L78 Accepts]: Start accepts. Automaton has 109293 states and 262859 transitions. Word has length 61 [2022-03-15 16:28:25,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:28:25,389 INFO L470 AbstractCegarLoop]: Abstraction has 109293 states and 262859 transitions. [2022-03-15 16:28:25,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.4545454545454546) internal successors, (162), 65 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:28:25,389 INFO L276 IsEmpty]: Start isEmpty. Operand 109293 states and 262859 transitions. [2022-03-15 16:28:25,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-15 16:28:25,472 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:28:25,473 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:28:25,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-03-15 16:28:25,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:28:25,673 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:28:25,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:28:25,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1163558027, now seen corresponding path program 75 times [2022-03-15 16:28:25,673 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:28:25,673 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520440456] [2022-03-15 16:28:25,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:28:25,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:28:25,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:28:26,085 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 99 proven. 155 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-15 16:28:26,085 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:28:26,085 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520440456] [2022-03-15 16:28:26,085 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520440456] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:28:26,085 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553994532] [2022-03-15 16:28:26,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:28:26,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:28:26,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:28:26,086 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:28:26,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-15 16:28:26,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-03-15 16:28:26,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:28:26,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 50 conjunts are in the unsatisfiable core [2022-03-15 16:28:26,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:28:26,890 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 56 proven. 207 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:28:26,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:28:28,489 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 72 proven. 193 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:28:28,490 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553994532] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:28:28,490 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:28:28,490 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 27, 30] total 73 [2022-03-15 16:28:28,490 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874475504] [2022-03-15 16:28:28,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:28:28,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-03-15 16:28:28,490 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:28:28,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-03-15 16:28:28,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=971, Invalid=4431, Unknown=0, NotChecked=0, Total=5402 [2022-03-15 16:28:28,491 INFO L87 Difference]: Start difference. First operand 109293 states and 262859 transitions. Second operand has 74 states, 74 states have (on average 2.2162162162162162) internal successors, (164), 73 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:28:41,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:28:41,447 INFO L93 Difference]: Finished difference Result 249967 states and 589663 transitions. [2022-03-15 16:28:41,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 247 states. [2022-03-15 16:28:41,447 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.2162162162162162) internal successors, (164), 73 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-03-15 16:28:41,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:28:42,336 INFO L225 Difference]: With dead ends: 249967 [2022-03-15 16:28:42,336 INFO L226 Difference]: Without dead ends: 249514 [2022-03-15 16:28:42,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 314 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42883 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=23732, Invalid=75808, Unknown=0, NotChecked=0, Total=99540 [2022-03-15 16:28:42,340 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1137 mSDsluCounter, 972 mSDsCounter, 0 mSdLazyCounter, 3928 mSolverCounterSat, 465 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1137 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 4393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 465 IncrementalHoareTripleChecker+Valid, 3928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:28:42,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1137 Valid, 491 Invalid, 4393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [465 Valid, 3928 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-15 16:28:42,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249514 states. [2022-03-15 16:28:45,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249514 to 110936. [2022-03-15 16:28:45,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110936 states, 110935 states have (on average 2.4123856312254923) internal successors, (267618), 110935 states have internal predecessors, (267618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:28:45,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110936 states to 110936 states and 267618 transitions. [2022-03-15 16:28:45,978 INFO L78 Accepts]: Start accepts. Automaton has 110936 states and 267618 transitions. Word has length 61 [2022-03-15 16:28:45,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:28:45,978 INFO L470 AbstractCegarLoop]: Abstraction has 110936 states and 267618 transitions. [2022-03-15 16:28:45,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.2162162162162162) internal successors, (164), 73 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:28:45,978 INFO L276 IsEmpty]: Start isEmpty. Operand 110936 states and 267618 transitions. [2022-03-15 16:28:46,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-15 16:28:46,301 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:28:46,301 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:28:46,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-03-15 16:28:46,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-03-15 16:28:46,502 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:28:46,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:28:46,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1391515015, now seen corresponding path program 76 times [2022-03-15 16:28:46,502 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:28:46,502 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553053964] [2022-03-15 16:28:46,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:28:46,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:28:46,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:28:46,660 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 1 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:28:46,660 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:28:46,660 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553053964] [2022-03-15 16:28:46,660 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553053964] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:28:46,660 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081765704] [2022-03-15 16:28:46,660 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:28:46,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:28:46,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:28:46,661 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:28:46,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-15 16:28:46,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:28:46,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:28:46,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 16:28:46,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:28:46,862 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:28:46,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:28:48,010 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 144 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:28:48,010 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081765704] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:28:48,010 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:28:48,010 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 27] total 39 [2022-03-15 16:28:48,010 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489094690] [2022-03-15 16:28:48,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:28:48,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-15 16:28:48,011 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:28:48,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-15 16:28:48,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=1107, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 16:28:48,011 INFO L87 Difference]: Start difference. First operand 110936 states and 267618 transitions. Second operand has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 39 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:28:49,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:28:49,041 INFO L93 Difference]: Finished difference Result 130966 states and 318689 transitions. [2022-03-15 16:28:49,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 16:28:49,041 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 39 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-03-15 16:28:49,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:28:49,367 INFO L225 Difference]: With dead ends: 130966 [2022-03-15 16:28:49,367 INFO L226 Difference]: Without dead ends: 130879 [2022-03-15 16:28:49,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 110 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=375, Invalid=1107, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 16:28:49,367 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 667 mSDsluCounter, 1826 mSDsCounter, 0 mSdLazyCounter, 1153 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 667 SdHoareTripleChecker+Valid, 1378 SdHoareTripleChecker+Invalid, 1302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 1153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:28:49,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [667 Valid, 1378 Invalid, 1302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 1153 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:28:49,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130879 states. [2022-03-15 16:28:51,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130879 to 130255. [2022-03-15 16:28:51,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130255 states, 130254 states have (on average 2.4369232422804674) internal successors, (317419), 130254 states have internal predecessors, (317419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:28:52,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130255 states to 130255 states and 317419 transitions. [2022-03-15 16:28:52,240 INFO L78 Accepts]: Start accepts. Automaton has 130255 states and 317419 transitions. Word has length 63 [2022-03-15 16:28:52,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:28:52,240 INFO L470 AbstractCegarLoop]: Abstraction has 130255 states and 317419 transitions. [2022-03-15 16:28:52,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 39 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:28:52,240 INFO L276 IsEmpty]: Start isEmpty. Operand 130255 states and 317419 transitions. [2022-03-15 16:28:52,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-15 16:28:52,601 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:28:52,601 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:28:52,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-03-15 16:28:52,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-03-15 16:28:52,801 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:28:52,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:28:52,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1351434417, now seen corresponding path program 77 times [2022-03-15 16:28:52,802 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:28:52,802 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494743272] [2022-03-15 16:28:52,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:28:52,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:28:52,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:28:53,124 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:28:53,124 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:28:53,124 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494743272] [2022-03-15 16:28:53,124 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494743272] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:28:53,124 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550851585] [2022-03-15 16:28:53,124 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:28:53,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:28:53,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:28:53,125 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:28:53,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-15 16:28:53,160 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2022-03-15 16:28:53,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:28:53,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 73 conjunts are in the unsatisfiable core [2022-03-15 16:28:53,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:28:54,111 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:28:54,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:28:59,950 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 1 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:28:59,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550851585] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:28:59,950 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:28:59,950 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 30, 30] total 74 [2022-03-15 16:28:59,950 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631492865] [2022-03-15 16:28:59,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:28:59,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-03-15 16:28:59,951 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:28:59,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-03-15 16:28:59,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1158, Invalid=4392, Unknown=0, NotChecked=0, Total=5550 [2022-03-15 16:28:59,951 INFO L87 Difference]: Start difference. First operand 130255 states and 317419 transitions. Second operand has 75 states, 75 states have (on average 2.36) internal successors, (177), 74 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:29:38,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:29:38,216 INFO L93 Difference]: Finished difference Result 225731 states and 540537 transitions. [2022-03-15 16:29:38,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 227 states. [2022-03-15 16:29:38,217 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.36) internal successors, (177), 74 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-03-15 16:29:38,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:29:38,836 INFO L225 Difference]: With dead ends: 225731 [2022-03-15 16:29:38,837 INFO L226 Difference]: Without dead ends: 225686 [2022-03-15 16:29:38,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 295 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34219 ImplicationChecksByTransitivity, 34.3s TimeCoverageRelationStatistics Valid=16938, Invalid=70974, Unknown=0, NotChecked=0, Total=87912 [2022-03-15 16:29:38,840 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 2250 mSDsluCounter, 3693 mSDsCounter, 0 mSdLazyCounter, 13273 mSolverCounterSat, 1010 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2250 SdHoareTripleChecker+Valid, 1952 SdHoareTripleChecker+Invalid, 14283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1010 IncrementalHoareTripleChecker+Valid, 13273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:29:38,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2250 Valid, 1952 Invalid, 14283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1010 Valid, 13273 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-03-15 16:29:39,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225686 states. [2022-03-15 16:29:43,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225686 to 162327. [2022-03-15 16:29:43,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162327 states, 162326 states have (on average 2.4435087416680012) internal successors, (396645), 162326 states have internal predecessors, (396645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:29:43,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162327 states to 162327 states and 396645 transitions. [2022-03-15 16:29:43,684 INFO L78 Accepts]: Start accepts. Automaton has 162327 states and 396645 transitions. Word has length 63 [2022-03-15 16:29:43,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:29:43,684 INFO L470 AbstractCegarLoop]: Abstraction has 162327 states and 396645 transitions. [2022-03-15 16:29:43,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.36) internal successors, (177), 74 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:29:43,685 INFO L276 IsEmpty]: Start isEmpty. Operand 162327 states and 396645 transitions. [2022-03-15 16:29:44,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-15 16:29:44,087 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:29:44,087 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:29:44,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-03-15 16:29:44,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:29:44,288 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:29:44,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:29:44,288 INFO L85 PathProgramCache]: Analyzing trace with hash -2081800327, now seen corresponding path program 78 times [2022-03-15 16:29:44,288 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:29:44,288 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395710058] [2022-03-15 16:29:44,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:29:44,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:29:44,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:29:44,611 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 23 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:29:44,611 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:29:44,611 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395710058] [2022-03-15 16:29:44,611 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395710058] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:29:44,611 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629219150] [2022-03-15 16:29:44,612 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:29:44,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:29:44,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:29:44,613 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:29:44,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-15 16:29:44,650 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-03-15 16:29:44,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:29:44,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 70 conjunts are in the unsatisfiable core [2022-03-15 16:29:44,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:29:45,611 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 23 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:29:45,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:29:51,296 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 34 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:29:51,296 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629219150] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:29:51,296 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:29:51,296 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 30, 30] total 73 [2022-03-15 16:29:51,296 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402739453] [2022-03-15 16:29:51,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:29:51,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-03-15 16:29:51,297 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:29:51,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-03-15 16:29:51,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1270, Invalid=4132, Unknown=0, NotChecked=0, Total=5402 [2022-03-15 16:29:51,297 INFO L87 Difference]: Start difference. First operand 162327 states and 396645 transitions. Second operand has 74 states, 74 states have (on average 2.2837837837837838) internal successors, (169), 73 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:30:17,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:30:17,946 INFO L93 Difference]: Finished difference Result 184500 states and 451193 transitions. [2022-03-15 16:30:17,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2022-03-15 16:30:17,946 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.2837837837837838) internal successors, (169), 73 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-03-15 16:30:17,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:30:18,598 INFO L225 Difference]: With dead ends: 184500 [2022-03-15 16:30:18,598 INFO L226 Difference]: Without dead ends: 184476 [2022-03-15 16:30:18,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21664 ImplicationChecksByTransitivity, 23.6s TimeCoverageRelationStatistics Valid=13703, Invalid=44619, Unknown=0, NotChecked=0, Total=58322 [2022-03-15 16:30:18,600 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 1746 mSDsluCounter, 2518 mSDsCounter, 0 mSdLazyCounter, 11370 mSolverCounterSat, 858 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1746 SdHoareTripleChecker+Valid, 1259 SdHoareTripleChecker+Invalid, 12228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 858 IncrementalHoareTripleChecker+Valid, 11370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:30:18,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1746 Valid, 1259 Invalid, 12228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [858 Valid, 11370 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-03-15 16:30:18,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184476 states. [2022-03-15 16:30:21,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184476 to 140233. [2022-03-15 16:30:21,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140233 states, 140232 states have (on average 2.4315776712875805) internal successors, (340985), 140232 states have internal predecessors, (340985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:30:22,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140233 states to 140233 states and 340985 transitions. [2022-03-15 16:30:22,244 INFO L78 Accepts]: Start accepts. Automaton has 140233 states and 340985 transitions. Word has length 63 [2022-03-15 16:30:22,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:30:22,244 INFO L470 AbstractCegarLoop]: Abstraction has 140233 states and 340985 transitions. [2022-03-15 16:30:22,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.2837837837837838) internal successors, (169), 73 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:30:22,245 INFO L276 IsEmpty]: Start isEmpty. Operand 140233 states and 340985 transitions. [2022-03-15 16:30:22,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-15 16:30:22,644 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:30:22,644 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:30:22,659 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-03-15 16:30:22,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:30:22,844 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:30:22,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:30:22,845 INFO L85 PathProgramCache]: Analyzing trace with hash 2077265363, now seen corresponding path program 79 times [2022-03-15 16:30:22,845 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:30:22,845 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243260707] [2022-03-15 16:30:22,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:30:22,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:30:22,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:30:23,156 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 2 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:30:23,157 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:30:23,157 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243260707] [2022-03-15 16:30:23,157 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243260707] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:30:23,157 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421746235] [2022-03-15 16:30:23,157 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:30:23,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:30:23,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:30:23,158 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:30:23,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-15 16:30:23,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:30:23,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 70 conjunts are in the unsatisfiable core [2022-03-15 16:30:23,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:30:24,131 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 2 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:30:24,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:30:28,712 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 6 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:30:28,712 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421746235] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:30:28,713 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:30:28,713 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 29, 31] total 76 [2022-03-15 16:30:28,713 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951880193] [2022-03-15 16:30:28,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:30:28,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-03-15 16:30:28,713 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:30:28,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-03-15 16:30:28,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1110, Invalid=4742, Unknown=0, NotChecked=0, Total=5852 [2022-03-15 16:30:28,714 INFO L87 Difference]: Start difference. First operand 140233 states and 340985 transitions. Second operand has 77 states, 77 states have (on average 2.311688311688312) internal successors, (178), 76 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2022-03-15 16:30:50,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 237 states. [2022-03-15 16:30:50,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 307 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36640 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=18270, Invalid=76902, Unknown=0, NotChecked=0, Total=95172 [2022-03-15 16:30:50,912 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 1728 mSDsluCounter, 742 mSDsCounter, 0 mSdLazyCounter, 8871 mSolverCounterSat, 1090 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1728 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 9961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1090 IncrementalHoareTripleChecker+Valid, 8871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:30:50,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1728 Valid, 180 Invalid, 9961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1090 Valid, 8871 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-03-15 16:30:50,913 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-03-15 16:30:50,922 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-15 16:30:50,922 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-15 16:30:50,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-03-15 16:30:51,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:30:51,125 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (140233states) and FLOYD_HOARE automaton (currently 237 states, 77 states before enhancement),while ReachableStatesComputation was computing reachable states (28170 states constructed, input type IntersectNwa). [2022-03-15 16:30:51,127 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-03-15 16:30:51,127 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-03-15 16:30:51,129 INFO L732 BasicCegarLoop]: Path program histogram: [79, 1, 1] [2022-03-15 16:30:51,130 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-15 16:30:51,130 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-15 16:30:51,131 INFO L202 PluginConnector]: Adding new model nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.03 04:30:51 BasicIcfg [2022-03-15 16:30:51,131 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-15 16:30:51,131 INFO L158 Benchmark]: Toolchain (without parser) took 732408.35ms. Allocated memory was 205.5MB in the beginning and 6.1GB in the end (delta: 5.9GB). Free memory was 162.7MB in the beginning and 1.8GB in the end (delta: -1.6GB). Peak memory consumption was 4.3GB. Max. memory is 8.0GB. [2022-03-15 16:30:51,131 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.11ms. Allocated memory is still 205.5MB. Free memory is still 163.8MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 16:30:51,132 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.43ms. Allocated memory is still 205.5MB. Free memory was 162.7MB in the beginning and 161.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-15 16:30:51,132 INFO L158 Benchmark]: Boogie Preprocessor took 11.97ms. Allocated memory is still 205.5MB. Free memory was 161.1MB in the beginning and 160.2MB in the end (delta: 909.8kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-15 16:30:51,132 INFO L158 Benchmark]: RCFGBuilder took 213.51ms. Allocated memory is still 205.5MB. Free memory was 160.2MB in the beginning and 151.5MB in the end (delta: 8.7MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. [2022-03-15 16:30:51,132 INFO L158 Benchmark]: TraceAbstraction took 732157.72ms. Allocated memory was 205.5MB in the beginning and 6.1GB in the end (delta: 5.9GB). Free memory was 150.9MB in the beginning and 1.8GB in the end (delta: -1.6GB). Peak memory consumption was 4.3GB. Max. memory is 8.0GB. [2022-03-15 16:30:51,132 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11ms. Allocated memory is still 205.5MB. Free memory is still 163.8MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 21.43ms. Allocated memory is still 205.5MB. Free memory was 162.7MB in the beginning and 161.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 11.97ms. Allocated memory is still 205.5MB. Free memory was 161.1MB in the beginning and 160.2MB in the end (delta: 909.8kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 213.51ms. Allocated memory is still 205.5MB. Free memory was 160.2MB in the beginning and 151.5MB in the end (delta: 8.7MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. * TraceAbstraction took 732157.72ms. Allocated memory was 205.5MB in the beginning and 6.1GB in the end (delta: 5.9GB). Free memory was 150.9MB in the beginning and 1.8GB in the end (delta: -1.6GB). Peak memory consumption was 4.3GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 50]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (140233states) and FLOYD_HOARE automaton (currently 237 states, 77 states before enhancement),while ReachableStatesComputation was computing reachable states (28170 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 45]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (140233states) and FLOYD_HOARE automaton (currently 237 states, 77 states before enhancement),while ReachableStatesComputation was computing reachable states (28170 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 45]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (140233states) and FLOYD_HOARE automaton (currently 237 states, 77 states before enhancement),while ReachableStatesComputation was computing reachable states (28170 states constructed, input type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 32 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 732.1s, OverallIterations: 81, TraceHistogramMax: 12, PathProgramHistogramMax: 79, EmptinessCheckTime: 3.1s, AutomataDifference: 516.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 57565 SdHoareTripleChecker+Valid, 76.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 57565 mSDsluCounter, 34360 SdHoareTripleChecker+Invalid, 64.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 62119 mSDsCounter, 20895 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 188711 IncrementalHoareTripleChecker+Invalid, 209606 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 20895 mSolverCounterUnsat, 2164 mSDtfsCounter, 188711 mSolverCounterSat, 0.5s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 17458 GetRequests, 4631 SyntacticMatches, 115 SemanticMatches, 12712 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1191870 ImplicationChecksByTransitivity, 455.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=162327occurred in iteration=79, InterpolantAutomatonStates: 9438, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 55.7s AutomataMinimizationTime, 80 MinimizatonAttempts, 1083426 StatesRemovedByMinimization, 80 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 137.0s InterpolantComputationTime, 6914 NumberOfCodeBlocks, 6914 NumberOfCodeBlocksAsserted, 502 NumberOfCheckSat, 10116 ConstructedInterpolants, 0 QuantifiedInterpolants, 148532 SizeOfPredicates, 585 NumberOfNonLiveVariables, 7931 ConjunctsInSsa, 2785 ConjunctsInUnsatCore, 239 InterpolantComputations, 2 PerfectInterpolantSequences, 7825/29167 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown