/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/parray-copy.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-4b0ab11 [2022-03-01 18:39:09,287 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-01 18:39:09,288 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-01 18:39:09,332 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-01 18:39:09,372 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 [2022-03-01 18:39:09,396 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-01 18:39:09,396 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-01 18:39:09,396 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-01 18:39:09,396 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-01 18:39:09,396 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-01 18:39:09,397 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-01 18:39:09,397 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-01 18:39:09,397 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-01 18:39:09,397 INFO L138 SettingsManager]: * Use SBE=true [2022-03-01 18:39:09,397 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-01 18:39:09,397 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-01 18:39:09,397 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-01 18:39:09,397 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-01 18:39:09,397 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-01 18:39:09,398 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-01 18:39:09,398 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-01 18:39:09,398 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-01 18:39:09,398 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-01 18:39:09,398 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-01 18:39:09,398 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-01 18:39:09,398 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-01 18:39:09,398 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-01 18:39:09,398 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-01 18:39:09,398 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-01 18:39:09,398 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-01 18:39:09,398 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-01 18:39:09,399 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-01 18:39:09,399 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-01 18:39:09,399 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-01 18:39:09,399 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-01 18:39:09,399 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-01 18:39:09,399 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-01 18:39:09,399 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-01 18:39:09,399 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-01 18:39:09,575 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-01 18:39:09,591 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-01 18:39:09,592 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-01 18:39:09,593 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-01 18:39:09,594 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-01 18:39:09,595 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/parray-copy.wvr.bpl [2022-03-01 18:39:09,595 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/parray-copy.wvr.bpl' [2022-03-01 18:39:09,614 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-01 18:39:09,616 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-01 18:39:09,616 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-01 18:39:09,616 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-01 18:39:09,616 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-01 18:39:09,628 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:39:09" (1/1) ... [2022-03-01 18:39:09,638 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:39:09" (1/1) ... [2022-03-01 18:39:09,644 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-01 18:39:09,645 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-01 18:39:09,646 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-01 18:39:09,646 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-01 18:39:09,646 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-01 18:39:09,651 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:39:09" (1/1) ... [2022-03-01 18:39:09,651 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:39:09" (1/1) ... [2022-03-01 18:39:09,652 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:39:09" (1/1) ... [2022-03-01 18:39:09,652 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:39:09" (1/1) ... [2022-03-01 18:39:09,655 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:39:09" (1/1) ... [2022-03-01 18:39:09,659 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:39:09" (1/1) ... [2022-03-01 18:39:09,659 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:39:09" (1/1) ... [2022-03-01 18:39:09,661 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-01 18:39:09,663 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-01 18:39:09,663 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-01 18:39:09,663 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-01 18:39:09,664 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:39:09" (1/1) ... [2022-03-01 18:39:09,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-01 18:39:09,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:39:09,691 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) [2022-03-01 18:39:09,696 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 [2022-03-01 18:39:09,726 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-01 18:39:09,727 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-01 18:39:09,727 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-01 18:39:09,727 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-01 18:39:09,727 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-01 18:39:09,727 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-01 18:39:09,727 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-01 18:39:09,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-01 18:39:09,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-01 18:39:09,727 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-03-01 18:39:09,727 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-03-01 18:39:09,727 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-03-01 18:39:09,728 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-01 18:39:09,760 INFO L234 CfgBuilder]: Building ICFG [2022-03-01 18:39:09,761 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-01 18:39:09,831 INFO L275 CfgBuilder]: Performing block encoding [2022-03-01 18:39:09,841 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-01 18:39:09,842 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-01 18:39:09,843 INFO L202 PluginConnector]: Adding new model parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.03 06:39:09 BoogieIcfgContainer [2022-03-01 18:39:09,843 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-01 18:39:09,845 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-01 18:39:09,845 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-01 18:39:09,847 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-01 18:39:09,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:39:09" (1/2) ... [2022-03-01 18:39:09,848 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c541d1d and model type parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.03 06:39:09, skipping insertion in model container [2022-03-01 18:39:09,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.03 06:39:09" (2/2) ... [2022-03-01 18:39:09,849 INFO L111 eAbstractionObserver]: Analyzing ICFG parray-copy.wvr.bpl [2022-03-01 18:39:09,852 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-01 18:39:09,852 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-01 18:39:09,852 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-01 18:39:09,852 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-01 18:39:09,879 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-03-01 18:39:09,919 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-01 18:39:09,924 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 [2022-03-01 18:39:09,924 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-03-01 18:39:09,936 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 38 places, 31 transitions, 86 flow [2022-03-01 18:39:10,008 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 114 states, 113 states have (on average 2.7787610619469025) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:10,010 INFO L276 IsEmpty]: Start isEmpty. Operand has 114 states, 113 states have (on average 2.7787610619469025) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:10,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 18:39:10,018 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:39:10,018 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:39:10,018 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:39:10,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:39:10,022 INFO L85 PathProgramCache]: Analyzing trace with hash 599746223, now seen corresponding path program 1 times [2022-03-01 18:39:10,027 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:39:10,028 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360570180] [2022-03-01 18:39:10,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:39:10,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:39:10,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:39:10,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:10,211 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:39:10,211 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360570180] [2022-03-01 18:39:10,212 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360570180] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 18:39:10,212 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 18:39:10,212 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-01 18:39:10,213 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396398590] [2022-03-01 18:39:10,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:39:10,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 18:39:10,216 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:39:10,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 18:39:10,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-01 18:39:10,271 INFO L87 Difference]: Start difference. First operand has 114 states, 113 states have (on average 2.7787610619469025) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:10,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:39:10,330 INFO L93 Difference]: Finished difference Result 156 states and 438 transitions. [2022-03-01 18:39:10,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 18:39:10,334 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-01 18:39:10,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:39:10,341 INFO L225 Difference]: With dead ends: 156 [2022-03-01 18:39:10,341 INFO L226 Difference]: Without dead ends: 156 [2022-03-01 18:39:10,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-01 18:39:10,344 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 81 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:39:10,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 14 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 18:39:10,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-03-01 18:39:10,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 135. [2022-03-01 18:39:10,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.8059701492537314) internal successors, (376), 134 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:10,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 376 transitions. [2022-03-01 18:39:10,449 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 376 transitions. Word has length 20 [2022-03-01 18:39:10,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:39:10,450 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 376 transitions. [2022-03-01 18:39:10,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:10,450 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 376 transitions. [2022-03-01 18:39:10,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-01 18:39:10,452 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:39:10,452 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:39:10,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-01 18:39:10,452 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:39:10,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:39:10,453 INFO L85 PathProgramCache]: Analyzing trace with hash -530635729, now seen corresponding path program 1 times [2022-03-01 18:39:10,453 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:39:10,453 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560611295] [2022-03-01 18:39:10,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:39:10,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:39:10,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:39:10,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:10,486 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:39:10,486 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560611295] [2022-03-01 18:39:10,486 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560611295] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 18:39:10,486 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 18:39:10,486 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-01 18:39:10,486 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556337093] [2022-03-01 18:39:10,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:39:10,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-01 18:39:10,487 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:39:10,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-01 18:39:10,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-01 18:39:10,488 INFO L87 Difference]: Start difference. First operand 135 states and 376 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:10,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:39:10,522 INFO L93 Difference]: Finished difference Result 160 states and 450 transitions. [2022-03-01 18:39:10,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-01 18:39:10,523 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-01 18:39:10,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:39:10,525 INFO L225 Difference]: With dead ends: 160 [2022-03-01 18:39:10,525 INFO L226 Difference]: Without dead ends: 160 [2022-03-01 18:39:10,525 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 [2022-03-01 18:39:10,526 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 43 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:39:10,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 16 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 18:39:10,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-03-01 18:39:10,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2022-03-01 18:39:10,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.830188679245283) internal successors, (450), 159 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:10,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 450 transitions. [2022-03-01 18:39:10,540 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 450 transitions. Word has length 22 [2022-03-01 18:39:10,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:39:10,540 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 450 transitions. [2022-03-01 18:39:10,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:10,540 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 450 transitions. [2022-03-01 18:39:10,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:39:10,541 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:39:10,541 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:39:10,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-01 18:39:10,542 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:39:10,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:39:10,542 INFO L85 PathProgramCache]: Analyzing trace with hash 247610633, now seen corresponding path program 1 times [2022-03-01 18:39:10,542 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:39:10,542 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804316683] [2022-03-01 18:39:10,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:39:10,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:39:10,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:39:10,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:10,783 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:39:10,783 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804316683] [2022-03-01 18:39:10,783 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804316683] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:39:10,783 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628888777] [2022-03-01 18:39:10,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:39:10,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:39:10,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:39:10,786 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) [2022-03-01 18:39:10,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-01 18:39:10,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:39:10,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-01 18:39:10,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:39:11,127 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-01 18:39:11,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:11,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:39:11,187 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 18:39:11,190 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-03-01 18:39:11,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:11,439 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628888777] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:39:11,439 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:39:11,440 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 24 [2022-03-01 18:39:11,440 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926788027] [2022-03-01 18:39:11,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:39:11,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 18:39:11,442 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:39:11,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 18:39:11,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2022-03-01 18:39:11,443 INFO L87 Difference]: Start difference. First operand 160 states and 450 transitions. Second operand has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:12,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:39:12,006 INFO L93 Difference]: Finished difference Result 480 states and 1349 transitions. [2022-03-01 18:39:12,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 18:39:12,007 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 18:39:12,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:39:12,009 INFO L225 Difference]: With dead ends: 480 [2022-03-01 18:39:12,009 INFO L226 Difference]: Without dead ends: 312 [2022-03-01 18:39:12,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=262, Invalid=1144, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 18:39:12,010 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 335 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:39:12,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 121 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:39:12,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-03-01 18:39:12,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 194. [2022-03-01 18:39:12,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.8911917098445596) internal successors, (558), 193 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:12,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 558 transitions. [2022-03-01 18:39:12,019 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 558 transitions. Word has length 24 [2022-03-01 18:39:12,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:39:12,019 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 558 transitions. [2022-03-01 18:39:12,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:12,020 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 558 transitions. [2022-03-01 18:39:12,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:39:12,021 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:39:12,021 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:39:12,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-01 18:39:12,240 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 [2022-03-01 18:39:12,241 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:39:12,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:39:12,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1205438725, now seen corresponding path program 2 times [2022-03-01 18:39:12,241 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:39:12,242 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722862881] [2022-03-01 18:39:12,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:39:12,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:39:12,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:39:12,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:12,429 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:39:12,429 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722862881] [2022-03-01 18:39:12,429 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722862881] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:39:12,433 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999464742] [2022-03-01 18:39:12,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:39:12,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:39:12,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:39:12,435 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) [2022-03-01 18:39:12,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-01 18:39:12,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:39:12,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:39:12,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-01 18:39:12,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:39:12,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-01 18:39:12,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:12,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:39:12,872 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 18:39:12,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-03-01 18:39:13,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:13,099 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999464742] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:39:13,099 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:39:13,099 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 24 [2022-03-01 18:39:13,099 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073376350] [2022-03-01 18:39:13,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:39:13,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 18:39:13,099 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:39:13,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 18:39:13,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-03-01 18:39:13,100 INFO L87 Difference]: Start difference. First operand 194 states and 558 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:14,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:39:14,005 INFO L93 Difference]: Finished difference Result 598 states and 1797 transitions. [2022-03-01 18:39:14,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-01 18:39:14,005 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 18:39:14,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:39:14,008 INFO L225 Difference]: With dead ends: 598 [2022-03-01 18:39:14,008 INFO L226 Difference]: Without dead ends: 571 [2022-03-01 18:39:14,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=460, Invalid=1990, Unknown=0, NotChecked=0, Total=2450 [2022-03-01 18:39:14,010 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 307 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:39:14,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 219 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 477 Invalid, 0 Unknown, 101 Unchecked, 0.3s Time] [2022-03-01 18:39:14,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2022-03-01 18:39:14,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 287. [2022-03-01 18:39:14,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 2.944055944055944) internal successors, (842), 286 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:14,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 842 transitions. [2022-03-01 18:39:14,020 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 842 transitions. Word has length 24 [2022-03-01 18:39:14,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:39:14,021 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 842 transitions. [2022-03-01 18:39:14,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:14,021 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 842 transitions. [2022-03-01 18:39:14,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:39:14,022 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:39:14,022 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:39:14,040 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-01 18:39:14,240 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 [2022-03-01 18:39:14,240 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:39:14,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:39:14,241 INFO L85 PathProgramCache]: Analyzing trace with hash -695052013, now seen corresponding path program 3 times [2022-03-01 18:39:14,241 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:39:14,241 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278869168] [2022-03-01 18:39:14,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:39:14,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:39:14,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:39:14,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:14,438 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:39:14,439 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278869168] [2022-03-01 18:39:14,439 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278869168] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:39:14,439 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469880905] [2022-03-01 18:39:14,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:39:14,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:39:14,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:39:14,440 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) [2022-03-01 18:39:14,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:39:14,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:39:14,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-01 18:39:14,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-01 18:39:14,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:39:14,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-01 18:39:14,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:14,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:39:14,910 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 18:39:14,911 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-03-01 18:39:15,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:15,089 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469880905] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:39:15,089 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:39:15,089 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 24 [2022-03-01 18:39:15,089 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038216031] [2022-03-01 18:39:15,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:39:15,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 18:39:15,090 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:39:15,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 18:39:15,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-03-01 18:39:15,091 INFO L87 Difference]: Start difference. First operand 287 states and 842 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) [2022-03-01 18:39:16,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:39:16,945 INFO L93 Difference]: Finished difference Result 935 states and 2785 transitions. [2022-03-01 18:39:16,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-01 18:39:16,945 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 24 [2022-03-01 18:39:16,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:39:16,950 INFO L225 Difference]: With dead ends: 935 [2022-03-01 18:39:16,950 INFO L226 Difference]: Without dead ends: 832 [2022-03-01 18:39:16,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1427 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=817, Invalid=3875, Unknown=0, NotChecked=0, Total=4692 [2022-03-01 18:39:16,952 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 429 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 1154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 453 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:39:16,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [429 Valid, 299 Invalid, 1154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 606 Invalid, 0 Unknown, 453 Unchecked, 0.4s Time] [2022-03-01 18:39:16,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2022-03-01 18:39:16,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 321. [2022-03-01 18:39:16,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 3.003125) internal successors, (961), 320 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:16,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 961 transitions. [2022-03-01 18:39:16,990 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 961 transitions. Word has length 24 [2022-03-01 18:39:16,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:39:16,990 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 961 transitions. [2022-03-01 18:39:16,990 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) [2022-03-01 18:39:16,990 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 961 transitions. [2022-03-01 18:39:16,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:39:16,991 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:39:16,991 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:39:17,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-01 18:39:17,207 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 [2022-03-01 18:39:17,208 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:39:17,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:39:17,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1991715119, now seen corresponding path program 4 times [2022-03-01 18:39:17,208 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:39:17,209 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96534522] [2022-03-01 18:39:17,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:39:17,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:39:17,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:39:17,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:17,426 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:39:17,426 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96534522] [2022-03-01 18:39:17,426 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96534522] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:39:17,427 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763975524] [2022-03-01 18:39:17,427 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:39:17,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:39:17,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:39:17,430 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) [2022-03-01 18:39:17,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-01 18:39:17,486 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:39:17,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:39:17,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-01 18:39:17,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:39:17,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-01 18:39:17,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:17,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:39:17,755 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 18:39:17,755 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-03-01 18:39:17,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:17,972 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763975524] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:39:17,973 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:39:17,973 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 18:39:17,973 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105938576] [2022-03-01 18:39:17,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:39:17,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 18:39:17,973 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:39:17,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 18:39:17,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2022-03-01 18:39:17,974 INFO L87 Difference]: Start difference. First operand 321 states and 961 transitions. Second operand has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:18,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:39:18,502 INFO L93 Difference]: Finished difference Result 517 states and 1513 transitions. [2022-03-01 18:39:18,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 18:39:18,502 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 18:39:18,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:39:18,505 INFO L225 Difference]: With dead ends: 517 [2022-03-01 18:39:18,505 INFO L226 Difference]: Without dead ends: 486 [2022-03-01 18:39:18,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=245, Invalid=945, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 18:39:18,506 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 156 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:39:18,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 228 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:39:18,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2022-03-01 18:39:18,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 325. [2022-03-01 18:39:18,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.996913580246914) internal successors, (971), 324 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:18,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 971 transitions. [2022-03-01 18:39:18,519 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 971 transitions. Word has length 24 [2022-03-01 18:39:18,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:39:18,520 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 971 transitions. [2022-03-01 18:39:18,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:18,520 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 971 transitions. [2022-03-01 18:39:18,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:39:18,520 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:39:18,521 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:39:18,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-01 18:39:18,743 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 [2022-03-01 18:39:18,744 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:39:18,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:39:18,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1504212173, now seen corresponding path program 5 times [2022-03-01 18:39:18,744 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:39:18,744 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368138874] [2022-03-01 18:39:18,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:39:18,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:39:18,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:39:18,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:18,905 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:39:18,905 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368138874] [2022-03-01 18:39:18,905 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368138874] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:39:18,905 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764967944] [2022-03-01 18:39:18,906 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:39:18,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:39:18,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:39:18,907 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) [2022-03-01 18:39:18,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-01 18:39:18,940 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:39:18,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:39:18,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-01 18:39:18,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:39:19,142 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-01 18:39:19,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:19,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:39:19,305 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 18:39:19,306 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-03-01 18:39:19,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:19,444 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764967944] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:39:19,444 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:39:19,444 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 18:39:19,444 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345149531] [2022-03-01 18:39:19,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:39:19,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 18:39:19,444 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:39:19,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 18:39:19,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2022-03-01 18:39:19,445 INFO L87 Difference]: Start difference. First operand 325 states and 971 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:20,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:39:20,111 INFO L93 Difference]: Finished difference Result 556 states and 1609 transitions. [2022-03-01 18:39:20,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 18:39:20,112 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 18:39:20,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:39:20,115 INFO L225 Difference]: With dead ends: 556 [2022-03-01 18:39:20,115 INFO L226 Difference]: Without dead ends: 510 [2022-03-01 18:39:20,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=266, Invalid=1216, Unknown=0, NotChecked=0, Total=1482 [2022-03-01 18:39:20,116 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 148 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:39:20,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 265 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 718 Invalid, 0 Unknown, 78 Unchecked, 0.3s Time] [2022-03-01 18:39:20,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2022-03-01 18:39:20,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 327. [2022-03-01 18:39:20,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.9938650306748467) internal successors, (976), 326 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) [2022-03-01 18:39:20,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 976 transitions. [2022-03-01 18:39:20,124 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 976 transitions. Word has length 24 [2022-03-01 18:39:20,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:39:20,124 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 976 transitions. [2022-03-01 18:39:20,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:20,125 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 976 transitions. [2022-03-01 18:39:20,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:39:20,127 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:39:20,127 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:39:20,161 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-01 18:39:20,343 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 [2022-03-01 18:39:20,344 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:39:20,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:39:20,344 INFO L85 PathProgramCache]: Analyzing trace with hash 206371921, now seen corresponding path program 6 times [2022-03-01 18:39:20,344 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:39:20,344 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915490194] [2022-03-01 18:39:20,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:39:20,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:39:20,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:39:20,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:39:20,422 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:39:20,423 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915490194] [2022-03-01 18:39:20,423 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915490194] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:39:20,423 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325975078] [2022-03-01 18:39:20,423 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:39:20,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:39:20,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:39:20,424 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) [2022-03-01 18:39:20,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-01 18:39:20,448 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:39:20,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:39:20,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-01 18:39:20,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:39:20,598 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-01 18:39:20,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:20,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:39:20,730 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 18:39:20,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-03-01 18:39:20,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:20,889 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325975078] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:39:20,889 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:39:20,889 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 22 [2022-03-01 18:39:20,889 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488753347] [2022-03-01 18:39:20,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:39:20,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 18:39:20,890 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:39:20,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 18:39:20,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-03-01 18:39:20,891 INFO L87 Difference]: Start difference. First operand 327 states and 976 transitions. Second operand has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 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) [2022-03-01 18:39:22,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:39:22,276 INFO L93 Difference]: Finished difference Result 827 states and 2341 transitions. [2022-03-01 18:39:22,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-01 18:39:22,276 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 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 24 [2022-03-01 18:39:22,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:39:22,279 INFO L225 Difference]: With dead ends: 827 [2022-03-01 18:39:22,279 INFO L226 Difference]: Without dead ends: 785 [2022-03-01 18:39:22,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 829 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=585, Invalid=2495, Unknown=0, NotChecked=0, Total=3080 [2022-03-01 18:39:22,280 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 287 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 1119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 313 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:39:22,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 313 Invalid, 1119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 737 Invalid, 0 Unknown, 313 Unchecked, 0.4s Time] [2022-03-01 18:39:22,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2022-03-01 18:39:22,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 353. [2022-03-01 18:39:22,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 3.022727272727273) internal successors, (1064), 352 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:22,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 1064 transitions. [2022-03-01 18:39:22,290 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 1064 transitions. Word has length 24 [2022-03-01 18:39:22,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:39:22,290 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 1064 transitions. [2022-03-01 18:39:22,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 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) [2022-03-01 18:39:22,290 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 1064 transitions. [2022-03-01 18:39:22,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:39:22,291 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:39:22,291 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:39:22,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-01 18:39:22,507 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 [2022-03-01 18:39:22,508 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:39:22,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:39:22,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1282993899, now seen corresponding path program 7 times [2022-03-01 18:39:22,508 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:39:22,508 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142127341] [2022-03-01 18:39:22,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:39:22,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:39:22,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:39:22,589 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:22,590 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:39:22,590 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142127341] [2022-03-01 18:39:22,590 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142127341] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:39:22,590 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196300785] [2022-03-01 18:39:22,590 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:39:22,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:39:22,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:39:22,607 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) [2022-03-01 18:39:22,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-01 18:39:22,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:39:22,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:39:22,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:39:22,719 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:22,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:39:22,833 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:22,833 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196300785] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:39:22,834 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:39:22,834 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-01 18:39:22,834 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243278126] [2022-03-01 18:39:22,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:39:22,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 18:39:22,834 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:39:22,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 18:39:22,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-03-01 18:39:22,835 INFO L87 Difference]: Start difference. First operand 353 states and 1064 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:24,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:39:24,508 INFO L93 Difference]: Finished difference Result 2020 states and 5811 transitions. [2022-03-01 18:39:24,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-03-01 18:39:24,509 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 18:39:24,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:39:24,516 INFO L225 Difference]: With dead ends: 2020 [2022-03-01 18:39:24,517 INFO L226 Difference]: Without dead ends: 2020 [2022-03-01 18:39:24,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4273 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2378, Invalid=8752, Unknown=0, NotChecked=0, Total=11130 [2022-03-01 18:39:24,519 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 434 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 1278 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 1380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:39:24,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [434 Valid, 389 Invalid, 1380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1278 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 18:39:24,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2020 states. [2022-03-01 18:39:24,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2020 to 426. [2022-03-01 18:39:24,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 3.2188235294117646) internal successors, (1368), 425 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:24,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 1368 transitions. [2022-03-01 18:39:24,539 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 1368 transitions. Word has length 26 [2022-03-01 18:39:24,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:39:24,540 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 1368 transitions. [2022-03-01 18:39:24,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:24,540 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 1368 transitions. [2022-03-01 18:39:24,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:39:24,541 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:39:24,541 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:39:24,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-01 18:39:24,770 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 [2022-03-01 18:39:24,770 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:39:24,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:39:24,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1524378449, now seen corresponding path program 8 times [2022-03-01 18:39:24,771 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:39:24,771 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122616227] [2022-03-01 18:39:24,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:39:24,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:39:24,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:39:24,811 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:24,811 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:39:24,811 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122616227] [2022-03-01 18:39:24,811 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122616227] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:39:24,811 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558544796] [2022-03-01 18:39:24,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:39:24,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:39:24,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:39:24,832 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) [2022-03-01 18:39:24,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-01 18:39:24,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:39:24,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:39:24,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:39:24,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:39:24,947 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:24,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:39:25,045 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:25,045 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558544796] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:39:25,045 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:39:25,046 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-01 18:39:25,046 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146211350] [2022-03-01 18:39:25,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:39:25,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 18:39:25,046 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:39:25,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 18:39:25,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-03-01 18:39:25,047 INFO L87 Difference]: Start difference. First operand 426 states and 1368 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:25,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:39:25,762 INFO L93 Difference]: Finished difference Result 1467 states and 4213 transitions. [2022-03-01 18:39:25,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-01 18:39:25,762 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 18:39:25,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:39:25,767 INFO L225 Difference]: With dead ends: 1467 [2022-03-01 18:39:25,768 INFO L226 Difference]: Without dead ends: 1467 [2022-03-01 18:39:25,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=714, Invalid=2148, Unknown=0, NotChecked=0, Total=2862 [2022-03-01 18:39:25,769 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 344 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:39:25,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 186 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:39:25,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1467 states. [2022-03-01 18:39:25,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1467 to 438. [2022-03-01 18:39:25,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 3.2128146453089244) internal successors, (1404), 437 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:25,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 1404 transitions. [2022-03-01 18:39:25,782 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 1404 transitions. Word has length 26 [2022-03-01 18:39:25,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:39:25,782 INFO L470 AbstractCegarLoop]: Abstraction has 438 states and 1404 transitions. [2022-03-01 18:39:25,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:25,782 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 1404 transitions. [2022-03-01 18:39:25,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:39:25,783 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:39:25,783 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:39:25,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-01 18:39:25,999 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 [2022-03-01 18:39:25,999 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:39:26,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:39:26,000 INFO L85 PathProgramCache]: Analyzing trace with hash 673708591, now seen corresponding path program 9 times [2022-03-01 18:39:26,000 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:39:26,000 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301884396] [2022-03-01 18:39:26,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:39:26,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:39:26,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:39:26,072 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:26,072 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:39:26,072 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301884396] [2022-03-01 18:39:26,072 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301884396] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:39:26,072 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80088609] [2022-03-01 18:39:26,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:39:26,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:39:26,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:39:26,074 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) [2022-03-01 18:39:26,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-01 18:39:26,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 18:39:26,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:39:26,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-01 18:39:26,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:39:26,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-01 18:39:26,428 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:39:26,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:39:26,511 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 18:39:26,512 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-03-01 18:39:26,737 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:39:26,737 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80088609] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:39:26,737 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:39:26,737 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 27 [2022-03-01 18:39:26,738 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332937692] [2022-03-01 18:39:26,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:39:26,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 18:39:26,738 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:39:26,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 18:39:26,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2022-03-01 18:39:26,739 INFO L87 Difference]: Start difference. First operand 438 states and 1404 transitions. Second operand has 27 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:28,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:39:28,146 INFO L93 Difference]: Finished difference Result 1576 states and 4704 transitions. [2022-03-01 18:39:28,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-01 18:39:28,147 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 18:39:28,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:39:28,153 INFO L225 Difference]: With dead ends: 1576 [2022-03-01 18:39:28,153 INFO L226 Difference]: Without dead ends: 1576 [2022-03-01 18:39:28,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2258 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1436, Invalid=5704, Unknown=0, NotChecked=0, Total=7140 [2022-03-01 18:39:28,155 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 550 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 871 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 1484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 513 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:39:28,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [550 Valid, 418 Invalid, 1484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 871 Invalid, 0 Unknown, 513 Unchecked, 0.4s Time] [2022-03-01 18:39:28,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1576 states. [2022-03-01 18:39:28,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1576 to 431. [2022-03-01 18:39:28,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 3.2093023255813953) internal successors, (1380), 430 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:28,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 1380 transitions. [2022-03-01 18:39:28,169 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 1380 transitions. Word has length 26 [2022-03-01 18:39:28,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:39:28,169 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 1380 transitions. [2022-03-01 18:39:28,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:28,169 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 1380 transitions. [2022-03-01 18:39:28,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:39:28,170 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:39:28,170 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:39:28,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-01 18:39:28,386 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 [2022-03-01 18:39:28,386 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:39:28,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:39:28,387 INFO L85 PathProgramCache]: Analyzing trace with hash -48760871, now seen corresponding path program 10 times [2022-03-01 18:39:28,387 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:39:28,387 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503034525] [2022-03-01 18:39:28,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:39:28,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:39:28,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:39:28,425 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:28,426 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:39:28,426 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503034525] [2022-03-01 18:39:28,426 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503034525] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:39:28,426 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266543612] [2022-03-01 18:39:28,426 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:39:28,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:39:28,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:39:28,427 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) [2022-03-01 18:39:28,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-01 18:39:28,451 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:39:28,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:39:28,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:39:28,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:39:28,542 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:28,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:39:28,612 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:28,612 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266543612] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:39:28,612 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:39:28,612 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-01 18:39:28,612 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089805303] [2022-03-01 18:39:28,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:39:28,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 18:39:28,613 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:39:28,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 18:39:28,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-03-01 18:39:28,613 INFO L87 Difference]: Start difference. First operand 431 states and 1380 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:29,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:39:29,104 INFO L93 Difference]: Finished difference Result 1470 states and 4175 transitions. [2022-03-01 18:39:29,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-01 18:39:29,104 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 18:39:29,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:39:29,109 INFO L225 Difference]: With dead ends: 1470 [2022-03-01 18:39:29,110 INFO L226 Difference]: Without dead ends: 1470 [2022-03-01 18:39:29,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=449, Invalid=1357, Unknown=0, NotChecked=0, Total=1806 [2022-03-01 18:39:29,110 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 276 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:39:29,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 174 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:39:29,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2022-03-01 18:39:29,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 443. [2022-03-01 18:39:29,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 3.2036199095022626) internal successors, (1416), 442 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:29,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 1416 transitions. [2022-03-01 18:39:29,124 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 1416 transitions. Word has length 26 [2022-03-01 18:39:29,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:39:29,124 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 1416 transitions. [2022-03-01 18:39:29,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:29,124 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 1416 transitions. [2022-03-01 18:39:29,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:39:29,125 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:39:29,125 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:39:29,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-01 18:39:29,341 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 [2022-03-01 18:39:29,342 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:39:29,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:39:29,342 INFO L85 PathProgramCache]: Analyzing trace with hash 483145443, now seen corresponding path program 11 times [2022-03-01 18:39:29,342 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:39:29,342 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489882111] [2022-03-01 18:39:29,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:39:29,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:39:29,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:39:29,388 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:29,388 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:39:29,388 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489882111] [2022-03-01 18:39:29,388 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489882111] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:39:29,388 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578707927] [2022-03-01 18:39:29,388 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:39:29,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:39:29,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:39:29,404 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) [2022-03-01 18:39:29,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-01 18:39:29,436 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 18:39:29,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:39:29,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:39:29,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:39:29,515 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:29,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:39:29,568 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:29,569 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578707927] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:39:29,569 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:39:29,569 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-01 18:39:29,569 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649021540] [2022-03-01 18:39:29,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:39:29,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 18:39:29,569 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:39:29,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 18:39:29,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-03-01 18:39:29,570 INFO L87 Difference]: Start difference. First operand 443 states and 1416 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:29,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:39:29,993 INFO L93 Difference]: Finished difference Result 1271 states and 3742 transitions. [2022-03-01 18:39:29,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-01 18:39:29,993 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 18:39:29,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:39:29,998 INFO L225 Difference]: With dead ends: 1271 [2022-03-01 18:39:29,998 INFO L226 Difference]: Without dead ends: 1267 [2022-03-01 18:39:29,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=453, Invalid=1439, Unknown=0, NotChecked=0, Total=1892 [2022-03-01 18:39:29,999 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 283 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:39:29,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 164 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:39:30,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2022-03-01 18:39:30,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 491. [2022-03-01 18:39:30,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 3.1714285714285713) internal successors, (1554), 490 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:30,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 1554 transitions. [2022-03-01 18:39:30,036 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 1554 transitions. Word has length 26 [2022-03-01 18:39:30,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:39:30,036 INFO L470 AbstractCegarLoop]: Abstraction has 491 states and 1554 transitions. [2022-03-01 18:39:30,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:30,037 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 1554 transitions. [2022-03-01 18:39:30,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:39:30,038 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:39:30,038 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:39:30,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-01 18:39:30,251 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 [2022-03-01 18:39:30,251 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:39:30,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:39:30,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1461702887, now seen corresponding path program 12 times [2022-03-01 18:39:30,252 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:39:30,252 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147695950] [2022-03-01 18:39:30,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:39:30,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:39:30,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:39:30,294 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:30,295 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:39:30,295 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147695950] [2022-03-01 18:39:30,295 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147695950] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:39:30,295 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623006410] [2022-03-01 18:39:30,295 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:39:30,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:39:30,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:39:30,296 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) [2022-03-01 18:39:30,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-01 18:39:30,321 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 18:39:30,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:39:30,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:39:30,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:39:30,397 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:30,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:39:30,468 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:30,468 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623006410] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:39:30,468 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:39:30,468 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-01 18:39:30,468 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451655426] [2022-03-01 18:39:30,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:39:30,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 18:39:30,468 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:39:30,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 18:39:30,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-03-01 18:39:30,469 INFO L87 Difference]: Start difference. First operand 491 states and 1554 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:31,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:39:31,104 INFO L93 Difference]: Finished difference Result 1396 states and 4042 transitions. [2022-03-01 18:39:31,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-01 18:39:31,105 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 18:39:31,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:39:31,109 INFO L225 Difference]: With dead ends: 1396 [2022-03-01 18:39:31,109 INFO L226 Difference]: Without dead ends: 1396 [2022-03-01 18:39:31,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=584, Invalid=2068, Unknown=0, NotChecked=0, Total=2652 [2022-03-01 18:39:31,111 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 269 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:39:31,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 197 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:39:31,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1396 states. [2022-03-01 18:39:31,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1396 to 485. [2022-03-01 18:39:31,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 3.1714876033057853) internal successors, (1535), 484 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:31,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 1535 transitions. [2022-03-01 18:39:31,124 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 1535 transitions. Word has length 26 [2022-03-01 18:39:31,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:39:31,124 INFO L470 AbstractCegarLoop]: Abstraction has 485 states and 1535 transitions. [2022-03-01 18:39:31,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:31,124 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 1535 transitions. [2022-03-01 18:39:31,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:39:31,125 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:39:31,125 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:39:31,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-01 18:39:31,341 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 [2022-03-01 18:39:31,341 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:39:31,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:39:31,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1976268135, now seen corresponding path program 13 times [2022-03-01 18:39:31,342 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:39:31,342 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758205724] [2022-03-01 18:39:31,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:39:31,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:39:31,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:39:31,393 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:31,393 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:39:31,393 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758205724] [2022-03-01 18:39:31,393 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758205724] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:39:31,393 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675547018] [2022-03-01 18:39:31,393 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:39:31,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:39:31,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:39:31,394 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) [2022-03-01 18:39:31,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-01 18:39:31,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:39:31,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:39:31,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:39:31,523 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:31,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:39:31,595 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:31,595 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675547018] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:39:31,595 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:39:31,595 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-01 18:39:31,596 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117088478] [2022-03-01 18:39:31,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:39:31,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 18:39:31,596 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:39:31,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 18:39:31,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-03-01 18:39:31,597 INFO L87 Difference]: Start difference. First operand 485 states and 1535 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:32,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:39:32,617 INFO L93 Difference]: Finished difference Result 2177 states and 6037 transitions. [2022-03-01 18:39:32,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-01 18:39:32,617 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 18:39:32,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:39:32,624 INFO L225 Difference]: With dead ends: 2177 [2022-03-01 18:39:32,625 INFO L226 Difference]: Without dead ends: 2177 [2022-03-01 18:39:32,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1571 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1091, Invalid=3199, Unknown=0, NotChecked=0, Total=4290 [2022-03-01 18:39:32,626 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 427 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:39:32,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 306 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 737 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:39:32,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2177 states. [2022-03-01 18:39:32,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2177 to 509. [2022-03-01 18:39:32,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 508 states have (on average 3.22244094488189) internal successors, (1637), 508 states have internal predecessors, (1637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:32,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 1637 transitions. [2022-03-01 18:39:32,642 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 1637 transitions. Word has length 26 [2022-03-01 18:39:32,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:39:32,643 INFO L470 AbstractCegarLoop]: Abstraction has 509 states and 1637 transitions. [2022-03-01 18:39:32,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:32,643 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 1637 transitions. [2022-03-01 18:39:32,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:39:32,644 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:39:32,644 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:39:32,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-01 18:39:32,860 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 [2022-03-01 18:39:32,860 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:39:32,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:39:32,861 INFO L85 PathProgramCache]: Analyzing trace with hash 845077903, now seen corresponding path program 1 times [2022-03-01 18:39:32,861 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:39:32,861 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787070569] [2022-03-01 18:39:32,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:39:32,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:39:32,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:39:32,895 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:39:32,895 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:39:32,895 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787070569] [2022-03-01 18:39:32,895 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787070569] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:39:32,895 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427538247] [2022-03-01 18:39:32,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:39:32,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:39:32,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:39:32,903 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) [2022-03-01 18:39:32,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-01 18:39:32,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:39:32,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-01 18:39:32,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:39:33,013 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:39:33,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:39:33,071 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:39:33,072 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427538247] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:39:33,072 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:39:33,072 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2022-03-01 18:39:33,072 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567272162] [2022-03-01 18:39:33,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:39:33,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 18:39:33,072 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:39:33,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 18:39:33,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-03-01 18:39:33,073 INFO L87 Difference]: Start difference. First operand 509 states and 1637 transitions. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 9 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) [2022-03-01 18:39:33,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:39:33,147 INFO L93 Difference]: Finished difference Result 734 states and 2247 transitions. [2022-03-01 18:39:33,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 18:39:33,148 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 18:39:33,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:39:33,150 INFO L225 Difference]: With dead ends: 734 [2022-03-01 18:39:33,150 INFO L226 Difference]: Without dead ends: 734 [2022-03-01 18:39:33,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2022-03-01 18:39:33,151 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 99 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:39:33,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 52 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 18:39:33,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2022-03-01 18:39:33,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 529. [2022-03-01 18:39:33,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 528 states have (on average 3.234848484848485) internal successors, (1708), 528 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:33,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 1708 transitions. [2022-03-01 18:39:33,160 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 1708 transitions. Word has length 26 [2022-03-01 18:39:33,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:39:33,161 INFO L470 AbstractCegarLoop]: Abstraction has 529 states and 1708 transitions. [2022-03-01 18:39:33,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 9 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) [2022-03-01 18:39:33,161 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 1708 transitions. [2022-03-01 18:39:33,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:39:33,162 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:39:33,162 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:39:33,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-01 18:39:33,378 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 [2022-03-01 18:39:33,378 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:39:33,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:39:33,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1808051533, now seen corresponding path program 14 times [2022-03-01 18:39:33,379 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:39:33,379 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179992352] [2022-03-01 18:39:33,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:39:33,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:39:33,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:39:33,412 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:33,412 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:39:33,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179992352] [2022-03-01 18:39:33,412 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179992352] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:39:33,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143656945] [2022-03-01 18:39:33,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:39:33,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:39:33,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:39:33,413 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) [2022-03-01 18:39:33,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-01 18:39:33,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:39:33,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:39:33,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:39:33,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:39:33,476 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:33,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:39:33,535 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:33,535 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143656945] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:39:33,536 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:39:33,536 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-03-01 18:39:33,536 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810457257] [2022-03-01 18:39:33,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:39:33,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 18:39:33,536 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:39:33,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 18:39:33,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-03-01 18:39:33,537 INFO L87 Difference]: Start difference. First operand 529 states and 1708 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:33,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:39:33,877 INFO L93 Difference]: Finished difference Result 1299 states and 3870 transitions. [2022-03-01 18:39:33,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-01 18:39:33,877 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 18:39:33,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:39:33,880 INFO L225 Difference]: With dead ends: 1299 [2022-03-01 18:39:33,881 INFO L226 Difference]: Without dead ends: 1299 [2022-03-01 18:39:33,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=282, Invalid=774, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 18:39:33,881 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 190 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:39:33,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 160 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:39:33,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1299 states. [2022-03-01 18:39:33,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1299 to 559. [2022-03-01 18:39:33,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 558 states have (on average 3.227598566308244) internal successors, (1801), 558 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:33,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 1801 transitions. [2022-03-01 18:39:33,893 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 1801 transitions. Word has length 26 [2022-03-01 18:39:33,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:39:33,894 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 1801 transitions. [2022-03-01 18:39:33,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:33,894 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 1801 transitions. [2022-03-01 18:39:33,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:39:33,895 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:39:33,895 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:39:33,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-01 18:39:34,112 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 [2022-03-01 18:39:34,112 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:39:34,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:39:34,112 INFO L85 PathProgramCache]: Analyzing trace with hash -957947885, now seen corresponding path program 15 times [2022-03-01 18:39:34,113 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:39:34,113 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788585893] [2022-03-01 18:39:34,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:39:34,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:39:34,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:39:34,165 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:34,166 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:39:34,166 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788585893] [2022-03-01 18:39:34,166 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788585893] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:39:34,166 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151933850] [2022-03-01 18:39:34,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:39:34,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:39:34,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:39:34,180 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) [2022-03-01 18:39:34,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-01 18:39:34,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:39:34,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:39:34,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:39:34,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:39:34,306 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:34,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:39:34,400 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:34,401 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151933850] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:39:34,401 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:39:34,401 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-01 18:39:34,401 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110662890] [2022-03-01 18:39:34,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:39:34,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 18:39:34,401 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:39:34,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 18:39:34,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-03-01 18:39:34,402 INFO L87 Difference]: Start difference. First operand 559 states and 1801 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:35,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:39:35,003 INFO L93 Difference]: Finished difference Result 2205 states and 6353 transitions. [2022-03-01 18:39:35,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-01 18:39:35,003 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 18:39:35,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:39:35,010 INFO L225 Difference]: With dead ends: 2205 [2022-03-01 18:39:35,010 INFO L226 Difference]: Without dead ends: 2205 [2022-03-01 18:39:35,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=678, Invalid=1772, Unknown=0, NotChecked=0, Total=2450 [2022-03-01 18:39:35,011 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 472 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:39:35,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [472 Valid, 247 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:39:35,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2205 states. [2022-03-01 18:39:35,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2205 to 652. [2022-03-01 18:39:35,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 651 states have (on average 3.3179723502304146) internal successors, (2160), 651 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:35,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 2160 transitions. [2022-03-01 18:39:35,039 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 2160 transitions. Word has length 26 [2022-03-01 18:39:35,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:39:35,040 INFO L470 AbstractCegarLoop]: Abstraction has 652 states and 2160 transitions. [2022-03-01 18:39:35,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:35,040 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 2160 transitions. [2022-03-01 18:39:35,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:39:35,041 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:39:35,041 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:39:35,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-01 18:39:35,255 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 [2022-03-01 18:39:35,255 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:39:35,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:39:35,256 INFO L85 PathProgramCache]: Analyzing trace with hash 2007423219, now seen corresponding path program 2 times [2022-03-01 18:39:35,256 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:39:35,256 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907501800] [2022-03-01 18:39:35,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:39:35,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:39:35,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:39:35,294 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:39:35,294 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:39:35,294 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907501800] [2022-03-01 18:39:35,294 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907501800] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:39:35,294 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980124291] [2022-03-01 18:39:35,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:39:35,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:39:35,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:39:35,295 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) [2022-03-01 18:39:35,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-01 18:39:35,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:39:35,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:39:35,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-01 18:39:35,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:39:35,397 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:39:35,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:39:35,474 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:39:35,474 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980124291] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:39:35,474 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:39:35,474 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-03-01 18:39:35,474 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997960978] [2022-03-01 18:39:35,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:39:35,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 18:39:35,474 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:39:35,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 18:39:35,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-03-01 18:39:35,476 INFO L87 Difference]: Start difference. First operand 652 states and 2160 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 10 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) [2022-03-01 18:39:35,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:39:35,620 INFO L93 Difference]: Finished difference Result 1170 states and 3661 transitions. [2022-03-01 18:39:35,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 18:39:35,620 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 10 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 26 [2022-03-01 18:39:35,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:39:35,623 INFO L225 Difference]: With dead ends: 1170 [2022-03-01 18:39:35,623 INFO L226 Difference]: Without dead ends: 1146 [2022-03-01 18:39:35,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=143, Unknown=0, NotChecked=0, Total=240 [2022-03-01 18:39:35,626 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 167 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:39:35,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 58 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:39:35,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1146 states. [2022-03-01 18:39:35,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1146 to 757. [2022-03-01 18:39:35,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 756 states have (on average 3.3465608465608465) internal successors, (2530), 756 states have internal predecessors, (2530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:35,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 2530 transitions. [2022-03-01 18:39:35,644 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 2530 transitions. Word has length 26 [2022-03-01 18:39:35,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:39:35,644 INFO L470 AbstractCegarLoop]: Abstraction has 757 states and 2530 transitions. [2022-03-01 18:39:35,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 10 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) [2022-03-01 18:39:35,644 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 2530 transitions. [2022-03-01 18:39:35,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:39:35,646 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:39:35,646 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:39:35,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-01 18:39:35,848 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 [2022-03-01 18:39:35,849 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:39:35,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:39:35,849 INFO L85 PathProgramCache]: Analyzing trace with hash -370202563, now seen corresponding path program 16 times [2022-03-01 18:39:35,849 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:39:35,849 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705904800] [2022-03-01 18:39:35,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:39:35,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:39:35,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:39:35,903 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:35,903 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:39:35,903 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705904800] [2022-03-01 18:39:35,903 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705904800] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:39:35,903 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601611092] [2022-03-01 18:39:35,903 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:39:35,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:39:35,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:39:35,919 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) [2022-03-01 18:39:35,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-01 18:39:35,945 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:39:35,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:39:35,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:39:35,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:39:36,025 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:36,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:39:36,108 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:36,108 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601611092] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:39:36,108 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:39:36,108 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-01 18:39:36,108 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816552818] [2022-03-01 18:39:36,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:39:36,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 18:39:36,109 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:39:36,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 18:39:36,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-03-01 18:39:36,109 INFO L87 Difference]: Start difference. First operand 757 states and 2530 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:36,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:39:36,889 INFO L93 Difference]: Finished difference Result 2137 states and 6442 transitions. [2022-03-01 18:39:36,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-01 18:39:36,889 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 18:39:36,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:39:36,896 INFO L225 Difference]: With dead ends: 2137 [2022-03-01 18:39:36,896 INFO L226 Difference]: Without dead ends: 2129 [2022-03-01 18:39:36,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1213 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=880, Invalid=2780, Unknown=0, NotChecked=0, Total=3660 [2022-03-01 18:39:36,897 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 312 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:39:36,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 223 Invalid, 789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:39:36,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2129 states. [2022-03-01 18:39:36,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2129 to 804. [2022-03-01 18:39:36,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 803 states have (on average 3.415940224159402) internal successors, (2743), 803 states have internal predecessors, (2743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:36,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 2743 transitions. [2022-03-01 18:39:36,949 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 2743 transitions. Word has length 26 [2022-03-01 18:39:36,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:39:36,949 INFO L470 AbstractCegarLoop]: Abstraction has 804 states and 2743 transitions. [2022-03-01 18:39:36,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:36,949 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 2743 transitions. [2022-03-01 18:39:36,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:39:36,951 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:39:36,951 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:39:36,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-01 18:39:37,168 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 [2022-03-01 18:39:37,168 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:39:37,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:39:37,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1473534255, now seen corresponding path program 17 times [2022-03-01 18:39:37,169 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:39:37,169 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147092884] [2022-03-01 18:39:37,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:39:37,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:39:37,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:39:37,205 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:37,205 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:39:37,205 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147092884] [2022-03-01 18:39:37,205 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147092884] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:39:37,205 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239642477] [2022-03-01 18:39:37,205 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:39:37,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:39:37,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:39:37,206 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) [2022-03-01 18:39:37,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-01 18:39:37,233 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:39:37,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:39:37,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:39:37,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:39:37,312 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:37,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:39:37,398 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:39:37,399 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239642477] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:39:37,399 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:39:37,399 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-01 18:39:37,399 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874329886] [2022-03-01 18:39:37,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:39:37,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 18:39:37,399 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:39:37,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 18:39:37,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-03-01 18:39:37,400 INFO L87 Difference]: Start difference. First operand 804 states and 2743 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:37,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:39:37,977 INFO L93 Difference]: Finished difference Result 2884 states and 8879 transitions. [2022-03-01 18:39:37,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-01 18:39:37,977 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 18:39:37,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:39:37,983 INFO L225 Difference]: With dead ends: 2884 [2022-03-01 18:39:37,984 INFO L226 Difference]: Without dead ends: 2884 [2022-03-01 18:39:37,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=860, Invalid=2220, Unknown=0, NotChecked=0, Total=3080 [2022-03-01 18:39:37,985 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 362 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:39:37,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 223 Invalid, 747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:39:37,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2884 states. [2022-03-01 18:39:38,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2884 to 926. [2022-03-01 18:39:38,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 3.5945945945945947) internal successors, (3325), 925 states have internal predecessors, (3325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:38,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 3325 transitions. [2022-03-01 18:39:38,031 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 3325 transitions. Word has length 26 [2022-03-01 18:39:38,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:39:38,031 INFO L470 AbstractCegarLoop]: Abstraction has 926 states and 3325 transitions. [2022-03-01 18:39:38,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:38,031 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 3325 transitions. [2022-03-01 18:39:38,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:39:38,034 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:39:38,035 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:39:38,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-01 18:39:38,250 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 [2022-03-01 18:39:38,251 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:39:38,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:39:38,251 INFO L85 PathProgramCache]: Analyzing trace with hash 465961067, now seen corresponding path program 18 times [2022-03-01 18:39:38,251 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:39:38,251 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754544268] [2022-03-01 18:39:38,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:39:38,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:39:38,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:39:38,280 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:38,280 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:39:38,280 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754544268] [2022-03-01 18:39:38,280 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754544268] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:39:38,280 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459030470] [2022-03-01 18:39:38,280 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:39:38,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:39:38,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:39:38,282 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) [2022-03-01 18:39:38,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-01 18:39:38,312 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:39:38,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:39:38,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:39:38,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:39:38,371 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:38,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:39:38,444 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:39:38,444 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459030470] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:39:38,444 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:39:38,444 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-01 18:39:38,445 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287265527] [2022-03-01 18:39:38,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:39:38,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 18:39:38,445 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:39:38,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 18:39:38,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-03-01 18:39:38,445 INFO L87 Difference]: Start difference. First operand 926 states and 3325 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:39,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:39:39,132 INFO L93 Difference]: Finished difference Result 3162 states and 9670 transitions. [2022-03-01 18:39:39,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-01 18:39:39,133 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 18:39:39,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:39:39,170 INFO L225 Difference]: With dead ends: 3162 [2022-03-01 18:39:39,170 INFO L226 Difference]: Without dead ends: 3162 [2022-03-01 18:39:39,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1240 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=926, Invalid=2734, Unknown=0, NotChecked=0, Total=3660 [2022-03-01 18:39:39,172 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 412 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:39:39,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 241 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 755 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:39:39,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3162 states. [2022-03-01 18:39:39,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3162 to 923. [2022-03-01 18:39:39,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 922 states have (on average 3.5911062906724514) internal successors, (3311), 922 states have internal predecessors, (3311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:39,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 3311 transitions. [2022-03-01 18:39:39,238 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 3311 transitions. Word has length 26 [2022-03-01 18:39:39,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:39:39,238 INFO L470 AbstractCegarLoop]: Abstraction has 923 states and 3311 transitions. [2022-03-01 18:39:39,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:39,239 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 3311 transitions. [2022-03-01 18:39:39,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:39:39,249 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:39:39,249 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:39:39,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-01 18:39:39,463 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 [2022-03-01 18:39:39,463 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:39:39,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:39:39,464 INFO L85 PathProgramCache]: Analyzing trace with hash -654035971, now seen corresponding path program 19 times [2022-03-01 18:39:39,464 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:39:39,464 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556487753] [2022-03-01 18:39:39,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:39:39,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:39:39,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:39:39,516 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:39,517 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:39:39,517 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556487753] [2022-03-01 18:39:39,517 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556487753] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:39:39,517 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186884373] [2022-03-01 18:39:39,517 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:39:39,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:39:39,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:39:39,518 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) [2022-03-01 18:39:39,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-01 18:39:39,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:39:39,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:39:39,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:39:39,626 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:39,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:39:39,726 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:39,726 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186884373] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:39:39,726 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:39:39,726 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2022-03-01 18:39:39,726 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785341336] [2022-03-01 18:39:39,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:39:39,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 18:39:39,727 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:39:39,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 18:39:39,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-03-01 18:39:39,727 INFO L87 Difference]: Start difference. First operand 923 states and 3311 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 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) [2022-03-01 18:39:40,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:39:40,291 INFO L93 Difference]: Finished difference Result 2838 states and 8728 transitions. [2022-03-01 18:39:40,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-01 18:39:40,291 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 18:39:40,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:39:40,308 INFO L225 Difference]: With dead ends: 2838 [2022-03-01 18:39:40,308 INFO L226 Difference]: Without dead ends: 2834 [2022-03-01 18:39:40,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=514, Invalid=1466, Unknown=0, NotChecked=0, Total=1980 [2022-03-01 18:39:40,309 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 327 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:39:40,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 198 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:39:40,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2834 states. [2022-03-01 18:39:40,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2834 to 929. [2022-03-01 18:39:40,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 928 states have (on average 3.5905172413793105) internal successors, (3332), 928 states have internal predecessors, (3332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:40,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 3332 transitions. [2022-03-01 18:39:40,341 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 3332 transitions. Word has length 26 [2022-03-01 18:39:40,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:39:40,341 INFO L470 AbstractCegarLoop]: Abstraction has 929 states and 3332 transitions. [2022-03-01 18:39:40,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 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) [2022-03-01 18:39:40,341 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 3332 transitions. [2022-03-01 18:39:40,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:39:40,343 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:39:40,343 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:39:40,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-01 18:39:40,560 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 [2022-03-01 18:39:40,560 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:39:40,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:39:40,560 INFO L85 PathProgramCache]: Analyzing trace with hash -383526279, now seen corresponding path program 20 times [2022-03-01 18:39:40,560 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:39:40,560 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965734765] [2022-03-01 18:39:40,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:39:40,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:39:40,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:39:40,604 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:40,604 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:39:40,604 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965734765] [2022-03-01 18:39:40,605 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965734765] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:39:40,605 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632362236] [2022-03-01 18:39:40,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:39:40,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:39:40,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:39:40,616 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) [2022-03-01 18:39:40,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-01 18:39:40,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:39:40,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:39:40,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:39:40,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:39:40,730 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:40,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:39:40,804 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:40,804 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632362236] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:39:40,804 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:39:40,804 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2022-03-01 18:39:40,804 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985501710] [2022-03-01 18:39:40,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:39:40,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 18:39:40,805 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:39:40,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 18:39:40,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-03-01 18:39:40,805 INFO L87 Difference]: Start difference. First operand 929 states and 3332 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 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) [2022-03-01 18:39:41,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:39:41,301 INFO L93 Difference]: Finished difference Result 3029 states and 9169 transitions. [2022-03-01 18:39:41,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-01 18:39:41,301 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 18:39:41,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:39:41,307 INFO L225 Difference]: With dead ends: 3029 [2022-03-01 18:39:41,307 INFO L226 Difference]: Without dead ends: 3029 [2022-03-01 18:39:41,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=666, Invalid=1986, Unknown=0, NotChecked=0, Total=2652 [2022-03-01 18:39:41,308 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 440 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:39:41,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [440 Valid, 223 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:39:41,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3029 states. [2022-03-01 18:39:41,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3029 to 925. [2022-03-01 18:39:41,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 925 states, 924 states have (on average 3.593073593073593) internal successors, (3320), 924 states have internal predecessors, (3320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:41,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 3320 transitions. [2022-03-01 18:39:41,337 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 3320 transitions. Word has length 26 [2022-03-01 18:39:41,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:39:41,337 INFO L470 AbstractCegarLoop]: Abstraction has 925 states and 3320 transitions. [2022-03-01 18:39:41,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 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) [2022-03-01 18:39:41,337 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 3320 transitions. [2022-03-01 18:39:41,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:39:41,339 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:39:41,339 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:39:41,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-01 18:39:41,555 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 [2022-03-01 18:39:41,555 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:39:41,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:39:41,555 INFO L85 PathProgramCache]: Analyzing trace with hash 201501907, now seen corresponding path program 21 times [2022-03-01 18:39:41,555 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:39:41,556 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595834865] [2022-03-01 18:39:41,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:39:41,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:39:41,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:39:41,596 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:41,596 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:39:41,596 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595834865] [2022-03-01 18:39:41,596 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595834865] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:39:41,596 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635520829] [2022-03-01 18:39:41,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:39:41,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:39:41,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:39:41,598 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) [2022-03-01 18:39:41,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-01 18:39:41,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:39:41,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:39:41,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:39:41,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:39:41,696 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:41,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:39:41,763 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:41,763 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635520829] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:39:41,763 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:39:41,764 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-01 18:39:41,764 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223277003] [2022-03-01 18:39:41,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:39:41,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 18:39:41,765 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:39:41,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 18:39:41,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-03-01 18:39:41,765 INFO L87 Difference]: Start difference. First operand 925 states and 3320 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 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) [2022-03-01 18:39:42,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:39:42,206 INFO L93 Difference]: Finished difference Result 2778 states and 8527 transitions. [2022-03-01 18:39:42,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-01 18:39:42,207 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 18:39:42,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:39:42,212 INFO L225 Difference]: With dead ends: 2778 [2022-03-01 18:39:42,212 INFO L226 Difference]: Without dead ends: 2766 [2022-03-01 18:39:42,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=508, Invalid=1748, Unknown=0, NotChecked=0, Total=2256 [2022-03-01 18:39:42,213 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 274 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:39:42,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 206 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:39:42,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2766 states. [2022-03-01 18:39:42,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2766 to 943. [2022-03-01 18:39:42,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 943 states, 942 states have (on average 3.58067940552017) internal successors, (3373), 942 states have internal predecessors, (3373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:42,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 943 states to 943 states and 3373 transitions. [2022-03-01 18:39:42,241 INFO L78 Accepts]: Start accepts. Automaton has 943 states and 3373 transitions. Word has length 26 [2022-03-01 18:39:42,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:39:42,241 INFO L470 AbstractCegarLoop]: Abstraction has 943 states and 3373 transitions. [2022-03-01 18:39:42,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 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) [2022-03-01 18:39:42,241 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states and 3373 transitions. [2022-03-01 18:39:42,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:39:42,243 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:39:42,243 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:39:42,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-01 18:39:42,454 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 [2022-03-01 18:39:42,454 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:39:42,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:39:42,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1290502825, now seen corresponding path program 22 times [2022-03-01 18:39:42,454 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:39:42,454 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656453933] [2022-03-01 18:39:42,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:39:42,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:39:42,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:39:42,488 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:42,488 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:39:42,489 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656453933] [2022-03-01 18:39:42,489 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656453933] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:39:42,489 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374465100] [2022-03-01 18:39:42,489 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:39:42,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:39:42,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:39:42,490 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) [2022-03-01 18:39:42,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-01 18:39:42,523 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:39:42,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:39:42,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:39:42,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:39:42,588 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:42,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:39:42,643 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:42,644 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374465100] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:39:42,644 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:39:42,644 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-01 18:39:42,644 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658581973] [2022-03-01 18:39:42,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:39:42,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 18:39:42,644 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:39:42,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 18:39:42,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-03-01 18:39:42,644 INFO L87 Difference]: Start difference. First operand 943 states and 3373 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 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) [2022-03-01 18:39:42,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:39:42,969 INFO L93 Difference]: Finished difference Result 2518 states and 7974 transitions. [2022-03-01 18:39:42,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-01 18:39:42,970 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 18:39:42,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:39:42,974 INFO L225 Difference]: With dead ends: 2518 [2022-03-01 18:39:42,974 INFO L226 Difference]: Without dead ends: 2514 [2022-03-01 18:39:42,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=457, Invalid=1435, Unknown=0, NotChecked=0, Total=1892 [2022-03-01 18:39:42,975 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 309 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:39:42,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 147 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:39:42,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2022-03-01 18:39:43,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 993. [2022-03-01 18:39:43,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 993 states, 992 states have (on average 3.5524193548387095) internal successors, (3524), 992 states have internal predecessors, (3524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:43,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 993 states to 993 states and 3524 transitions. [2022-03-01 18:39:43,011 INFO L78 Accepts]: Start accepts. Automaton has 993 states and 3524 transitions. Word has length 26 [2022-03-01 18:39:43,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:39:43,011 INFO L470 AbstractCegarLoop]: Abstraction has 993 states and 3524 transitions. [2022-03-01 18:39:43,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 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) [2022-03-01 18:39:43,011 INFO L276 IsEmpty]: Start isEmpty. Operand 993 states and 3524 transitions. [2022-03-01 18:39:43,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:39:43,013 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:39:43,013 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:39:43,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-01 18:39:43,228 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 [2022-03-01 18:39:43,229 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:39:43,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:39:43,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1019993133, now seen corresponding path program 23 times [2022-03-01 18:39:43,229 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:39:43,229 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6675919] [2022-03-01 18:39:43,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:39:43,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:39:43,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:39:43,261 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:43,261 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:39:43,261 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6675919] [2022-03-01 18:39:43,261 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6675919] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:39:43,261 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808710107] [2022-03-01 18:39:43,261 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:39:43,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:39:43,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:39:43,262 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) [2022-03-01 18:39:43,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-01 18:39:43,289 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:39:43,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:39:43,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:39:43,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:39:43,334 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:43,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:39:43,375 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:43,375 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808710107] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:39:43,375 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:39:43,375 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-01 18:39:43,375 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541744547] [2022-03-01 18:39:43,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:39:43,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 18:39:43,376 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:39:43,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 18:39:43,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-03-01 18:39:43,376 INFO L87 Difference]: Start difference. First operand 993 states and 3524 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 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) [2022-03-01 18:39:43,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:39:43,852 INFO L93 Difference]: Finished difference Result 2664 states and 8331 transitions. [2022-03-01 18:39:43,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-01 18:39:43,853 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 18:39:43,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:39:43,857 INFO L225 Difference]: With dead ends: 2664 [2022-03-01 18:39:43,857 INFO L226 Difference]: Without dead ends: 2664 [2022-03-01 18:39:43,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=699, Invalid=2271, Unknown=0, NotChecked=0, Total=2970 [2022-03-01 18:39:43,859 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 297 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:39:43,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 164 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:39:43,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2664 states. [2022-03-01 18:39:43,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2664 to 983. [2022-03-01 18:39:43,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 983 states, 982 states have (on average 3.5570264765784114) internal successors, (3493), 982 states have internal predecessors, (3493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:43,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 983 states to 983 states and 3493 transitions. [2022-03-01 18:39:43,881 INFO L78 Accepts]: Start accepts. Automaton has 983 states and 3493 transitions. Word has length 26 [2022-03-01 18:39:43,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:39:43,881 INFO L470 AbstractCegarLoop]: Abstraction has 983 states and 3493 transitions. [2022-03-01 18:39:43,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 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) [2022-03-01 18:39:43,881 INFO L276 IsEmpty]: Start isEmpty. Operand 983 states and 3493 transitions. [2022-03-01 18:39:43,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:39:43,883 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:39:43,883 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:39:43,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-01 18:39:44,099 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 [2022-03-01 18:39:44,099 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:39:44,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:39:44,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1735381837, now seen corresponding path program 24 times [2022-03-01 18:39:44,099 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:39:44,099 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910417925] [2022-03-01 18:39:44,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:39:44,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:39:44,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:39:44,144 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:44,144 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:39:44,144 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910417925] [2022-03-01 18:39:44,144 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910417925] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:39:44,144 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92474737] [2022-03-01 18:39:44,144 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:39:44,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:39:44,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:39:44,145 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) [2022-03-01 18:39:44,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-01 18:39:44,172 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:39:44,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:39:44,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:39:44,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:39:44,251 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:44,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:39:44,332 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:44,332 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92474737] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:39:44,332 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:39:44,332 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-01 18:39:44,333 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099062717] [2022-03-01 18:39:44,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:39:44,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 18:39:44,333 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:39:44,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 18:39:44,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-03-01 18:39:44,333 INFO L87 Difference]: Start difference. First operand 983 states and 3493 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:44,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:39:44,782 INFO L93 Difference]: Finished difference Result 2141 states and 6857 transitions. [2022-03-01 18:39:44,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-01 18:39:44,782 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 18:39:44,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:39:44,787 INFO L225 Difference]: With dead ends: 2141 [2022-03-01 18:39:44,787 INFO L226 Difference]: Without dead ends: 2133 [2022-03-01 18:39:44,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=558, Invalid=1794, Unknown=0, NotChecked=0, Total=2352 [2022-03-01 18:39:44,788 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 263 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:39:44,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 178 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:39:44,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2133 states. [2022-03-01 18:39:44,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2133 to 984. [2022-03-01 18:39:44,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 984 states, 983 states have (on average 3.5595116988809767) internal successors, (3499), 983 states have internal predecessors, (3499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:44,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 3499 transitions. [2022-03-01 18:39:44,840 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 3499 transitions. Word has length 26 [2022-03-01 18:39:44,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:39:44,841 INFO L470 AbstractCegarLoop]: Abstraction has 984 states and 3499 transitions. [2022-03-01 18:39:44,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:44,841 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 3499 transitions. [2022-03-01 18:39:44,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:39:44,842 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:39:44,842 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:39:44,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-01 18:39:45,043 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 [2022-03-01 18:39:45,043 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:39:45,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:39:45,044 INFO L85 PathProgramCache]: Analyzing trace with hash -619306999, now seen corresponding path program 3 times [2022-03-01 18:39:45,044 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:39:45,044 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114935866] [2022-03-01 18:39:45,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:39:45,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:39:45,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:39:45,264 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:45,264 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:39:45,264 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114935866] [2022-03-01 18:39:45,265 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114935866] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:39:45,265 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869837644] [2022-03-01 18:39:45,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:39:45,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:39:45,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:39:45,267 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) [2022-03-01 18:39:45,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-01 18:39:45,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 18:39:45,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:39:45,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-01 18:39:45,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:39:45,383 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-01 18:39:45,524 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-03-01 18:39:45,524 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-03-01 18:39:45,681 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-01 18:39:45,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:39:45,777 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-03-01 18:39:45,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 26 [2022-03-01 18:39:45,916 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-01 18:39:45,916 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869837644] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:39:45,916 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:39:45,916 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 27 [2022-03-01 18:39:45,916 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958003921] [2022-03-01 18:39:45,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:39:45,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 18:39:45,916 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:39:45,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 18:39:45,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2022-03-01 18:39:45,917 INFO L87 Difference]: Start difference. First operand 984 states and 3499 transitions. Second operand has 27 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:47,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:39:47,189 INFO L93 Difference]: Finished difference Result 2741 states and 8807 transitions. [2022-03-01 18:39:47,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-01 18:39:47,189 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 18:39:47,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:39:47,196 INFO L225 Difference]: With dead ends: 2741 [2022-03-01 18:39:47,196 INFO L226 Difference]: Without dead ends: 2584 [2022-03-01 18:39:47,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1498 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=821, Invalid=4149, Unknown=0, NotChecked=0, Total=4970 [2022-03-01 18:39:47,198 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 560 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 1306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 495 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:39:47,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [560 Valid, 367 Invalid, 1306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 722 Invalid, 0 Unknown, 495 Unchecked, 0.3s Time] [2022-03-01 18:39:47,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2584 states. [2022-03-01 18:39:47,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2584 to 1171. [2022-03-01 18:39:47,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1171 states, 1170 states have (on average 3.4752136752136753) internal successors, (4066), 1170 states have internal predecessors, (4066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:47,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1171 states to 1171 states and 4066 transitions. [2022-03-01 18:39:47,233 INFO L78 Accepts]: Start accepts. Automaton has 1171 states and 4066 transitions. Word has length 28 [2022-03-01 18:39:47,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:39:47,234 INFO L470 AbstractCegarLoop]: Abstraction has 1171 states and 4066 transitions. [2022-03-01 18:39:47,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:47,234 INFO L276 IsEmpty]: Start isEmpty. Operand 1171 states and 4066 transitions. [2022-03-01 18:39:47,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:39:47,236 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:39:47,236 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:39:47,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-01 18:39:47,451 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 [2022-03-01 18:39:47,451 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:39:47,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:39:47,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1096873097, now seen corresponding path program 4 times [2022-03-01 18:39:47,452 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:39:47,452 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813532159] [2022-03-01 18:39:47,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:39:47,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:39:47,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:39:47,793 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:47,793 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:39:47,794 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813532159] [2022-03-01 18:39:47,794 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813532159] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:39:47,794 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853766811] [2022-03-01 18:39:47,794 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:39:47,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:39:47,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:39:47,804 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) [2022-03-01 18:39:47,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-01 18:39:47,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:39:47,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:39:47,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-01 18:39:47,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:39:48,129 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-01 18:39:48,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:39:48,194 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-03-01 18:39:48,271 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:48,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:39:48,309 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-03-01 18:39:48,309 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 26 [2022-03-01 18:39:48,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:48,583 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853766811] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:39:48,584 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:39:48,584 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2022-03-01 18:39:48,584 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362516182] [2022-03-01 18:39:48,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:39:48,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 18:39:48,584 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:39:48,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 18:39:48,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=801, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:39:48,585 INFO L87 Difference]: Start difference. First operand 1171 states and 4066 transitions. Second operand has 32 states, 32 states have (on average 2.28125) 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) [2022-03-01 18:39:50,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:39:50,265 INFO L93 Difference]: Finished difference Result 2434 states and 7660 transitions. [2022-03-01 18:39:50,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-01 18:39:50,266 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.28125) 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 28 [2022-03-01 18:39:50,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:39:50,271 INFO L225 Difference]: With dead ends: 2434 [2022-03-01 18:39:50,271 INFO L226 Difference]: Without dead ends: 2420 [2022-03-01 18:39:50,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1291 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=783, Invalid=3249, Unknown=0, NotChecked=0, Total=4032 [2022-03-01 18:39:50,272 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 531 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:39:50,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [531 Valid, 278 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 550 Invalid, 0 Unknown, 135 Unchecked, 0.3s Time] [2022-03-01 18:39:50,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2420 states. [2022-03-01 18:39:50,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2420 to 1228. [2022-03-01 18:39:50,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1228 states, 1227 states have (on average 3.493072534637327) internal successors, (4286), 1227 states have internal predecessors, (4286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:50,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 4286 transitions. [2022-03-01 18:39:50,299 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 4286 transitions. Word has length 28 [2022-03-01 18:39:50,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:39:50,299 INFO L470 AbstractCegarLoop]: Abstraction has 1228 states and 4286 transitions. [2022-03-01 18:39:50,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.28125) 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) [2022-03-01 18:39:50,299 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 4286 transitions. [2022-03-01 18:39:50,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:39:50,301 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:39:50,302 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:39:50,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-01 18:39:50,519 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 [2022-03-01 18:39:50,519 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:39:50,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:39:50,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1118800371, now seen corresponding path program 5 times [2022-03-01 18:39:50,520 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:39:50,520 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099732109] [2022-03-01 18:39:50,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:39:50,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:39:50,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:39:50,839 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:50,839 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:39:50,840 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099732109] [2022-03-01 18:39:50,840 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099732109] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:39:50,840 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199869026] [2022-03-01 18:39:50,840 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:39:50,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:39:50,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:39:50,841 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) [2022-03-01 18:39:50,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-01 18:39:50,879 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:39:50,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:39:50,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-01 18:39:50,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:39:51,120 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-01 18:39:51,175 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-03-01 18:39:51,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-03-01 18:39:51,319 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:51,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:39:51,384 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-03-01 18:39:51,384 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 26 [2022-03-01 18:39:51,593 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:51,593 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199869026] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:39:51,593 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:39:51,593 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 32 [2022-03-01 18:39:51,593 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277655678] [2022-03-01 18:39:51,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:39:51,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 18:39:51,594 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:39:51,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 18:39:51,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=846, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:39:51,594 INFO L87 Difference]: Start difference. First operand 1228 states and 4286 transitions. Second operand has 32 states, 32 states have (on average 2.28125) 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) [2022-03-01 18:39:54,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:39:54,556 INFO L93 Difference]: Finished difference Result 3044 states and 9116 transitions. [2022-03-01 18:39:54,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-03-01 18:39:54,556 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.28125) 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 28 [2022-03-01 18:39:54,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:39:54,562 INFO L225 Difference]: With dead ends: 3044 [2022-03-01 18:39:54,562 INFO L226 Difference]: Without dead ends: 3010 [2022-03-01 18:39:54,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 46 SyntacticMatches, 6 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5332 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2250, Invalid=11556, Unknown=0, NotChecked=0, Total=13806 [2022-03-01 18:39:54,564 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 806 mSDsluCounter, 934 mSDsCounter, 0 mSdLazyCounter, 870 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 806 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 1753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 732 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:39:54,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [806 Valid, 531 Invalid, 1753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 870 Invalid, 0 Unknown, 732 Unchecked, 0.4s Time] [2022-03-01 18:39:54,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3010 states. [2022-03-01 18:39:54,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3010 to 1385. [2022-03-01 18:39:54,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1385 states, 1384 states have (on average 3.538294797687861) internal successors, (4897), 1384 states have internal predecessors, (4897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:54,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1385 states to 1385 states and 4897 transitions. [2022-03-01 18:39:54,599 INFO L78 Accepts]: Start accepts. Automaton has 1385 states and 4897 transitions. Word has length 28 [2022-03-01 18:39:54,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:39:54,599 INFO L470 AbstractCegarLoop]: Abstraction has 1385 states and 4897 transitions. [2022-03-01 18:39:54,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.28125) 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) [2022-03-01 18:39:54,599 INFO L276 IsEmpty]: Start isEmpty. Operand 1385 states and 4897 transitions. [2022-03-01 18:39:54,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:39:54,601 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:39:54,601 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:39:54,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-01 18:39:54,817 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 [2022-03-01 18:39:54,817 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:39:54,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:39:54,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1056275707, now seen corresponding path program 25 times [2022-03-01 18:39:54,818 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:39:54,818 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144175088] [2022-03-01 18:39:54,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:39:54,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:39:54,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:39:55,160 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:55,161 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:39:55,161 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144175088] [2022-03-01 18:39:55,161 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144175088] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:39:55,161 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298598759] [2022-03-01 18:39:55,161 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:39:55,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:39:55,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:39:55,162 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) [2022-03-01 18:39:55,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-01 18:39:55,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:39:55,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-01 18:39:55,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:39:55,512 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:39:55,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:39:55,555 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-03-01 18:39:55,638 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:55,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:39:55,673 INFO L353 Elim1Store]: treesize reduction 20, result has 31.0 percent of original size [2022-03-01 18:39:55,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 22 [2022-03-01 18:39:55,954 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:55,954 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298598759] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:39:55,954 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:39:55,954 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 34 [2022-03-01 18:39:55,955 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385438165] [2022-03-01 18:39:55,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:39:55,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-01 18:39:55,955 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:39:55,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-01 18:39:55,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=982, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 18:39:55,955 INFO L87 Difference]: Start difference. First operand 1385 states and 4897 transitions. Second operand has 34 states, 34 states have (on average 2.264705882352941) internal successors, (77), 34 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:59,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:39:59,276 INFO L93 Difference]: Finished difference Result 2663 states and 8706 transitions. [2022-03-01 18:39:59,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-01 18:39:59,276 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.264705882352941) internal successors, (77), 34 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 18:39:59,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:39:59,281 INFO L225 Difference]: With dead ends: 2663 [2022-03-01 18:39:59,281 INFO L226 Difference]: Without dead ends: 2636 [2022-03-01 18:39:59,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4309 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1806, Invalid=11304, Unknown=0, NotChecked=0, Total=13110 [2022-03-01 18:39:59,283 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 564 mSDsluCounter, 783 mSDsCounter, 0 mSdLazyCounter, 1923 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 2128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 18:39:59,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [564 Valid, 419 Invalid, 2128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1923 Invalid, 0 Unknown, 68 Unchecked, 0.8s Time] [2022-03-01 18:39:59,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2636 states. [2022-03-01 18:39:59,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2636 to 1620. [2022-03-01 18:39:59,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1620 states, 1619 states have (on average 3.449042618900556) internal successors, (5584), 1619 states have internal predecessors, (5584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:59,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1620 states to 1620 states and 5584 transitions. [2022-03-01 18:39:59,322 INFO L78 Accepts]: Start accepts. Automaton has 1620 states and 5584 transitions. Word has length 28 [2022-03-01 18:39:59,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:39:59,322 INFO L470 AbstractCegarLoop]: Abstraction has 1620 states and 5584 transitions. [2022-03-01 18:39:59,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.264705882352941) internal successors, (77), 34 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:59,322 INFO L276 IsEmpty]: Start isEmpty. Operand 1620 states and 5584 transitions. [2022-03-01 18:39:59,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:39:59,325 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:39:59,325 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:39:59,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-01 18:39:59,541 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 [2022-03-01 18:39:59,541 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:39:59,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:39:59,542 INFO L85 PathProgramCache]: Analyzing trace with hash -418897327, now seen corresponding path program 6 times [2022-03-01 18:39:59,542 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:39:59,542 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195216487] [2022-03-01 18:39:59,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:39:59,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:39:59,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:39:59,822 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:59,823 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:39:59,823 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195216487] [2022-03-01 18:39:59,823 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195216487] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:39:59,823 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594423453] [2022-03-01 18:39:59,823 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:39:59,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:39:59,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:39:59,824 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) [2022-03-01 18:39:59,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-01 18:39:59,855 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:39:59,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:39:59,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 18:39:59,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:40:00,001 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-01 18:40:00,089 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-03-01 18:40:00,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-03-01 18:40:00,178 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-01 18:40:00,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:40:00,271 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-03-01 18:40:00,272 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 26 [2022-03-01 18:40:00,454 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-01 18:40:00,454 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594423453] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:40:00,454 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:40:00,454 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 28 [2022-03-01 18:40:00,454 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385104192] [2022-03-01 18:40:00,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:40:00,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 18:40:00,454 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:40:00,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 18:40:00,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2022-03-01 18:40:00,455 INFO L87 Difference]: Start difference. First operand 1620 states and 5584 transitions. Second operand has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:40:01,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:40:01,882 INFO L93 Difference]: Finished difference Result 2371 states and 7702 transitions. [2022-03-01 18:40:01,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-01 18:40:01,883 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 18:40:01,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:40:01,887 INFO L225 Difference]: With dead ends: 2371 [2022-03-01 18:40:01,887 INFO L226 Difference]: Without dead ends: 2357 [2022-03-01 18:40:01,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=576, Invalid=2846, Unknown=0, NotChecked=0, Total=3422 [2022-03-01 18:40:01,888 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 375 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 1203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 530 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:40:01,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [375 Valid, 353 Invalid, 1203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 609 Invalid, 0 Unknown, 530 Unchecked, 0.3s Time] [2022-03-01 18:40:01,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2357 states. [2022-03-01 18:40:01,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2357 to 1669. [2022-03-01 18:40:01,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1669 states, 1668 states have (on average 3.4502398081534773) internal successors, (5755), 1668 states have internal predecessors, (5755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:40:01,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1669 states to 1669 states and 5755 transitions. [2022-03-01 18:40:01,915 INFO L78 Accepts]: Start accepts. Automaton has 1669 states and 5755 transitions. Word has length 28 [2022-03-01 18:40:01,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:40:01,915 INFO L470 AbstractCegarLoop]: Abstraction has 1669 states and 5755 transitions. [2022-03-01 18:40:01,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:40:01,916 INFO L276 IsEmpty]: Start isEmpty. Operand 1669 states and 5755 transitions. [2022-03-01 18:40:01,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:40:01,919 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:40:01,919 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:40:01,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-01 18:40:02,135 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 [2022-03-01 18:40:02,135 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:40:02,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:40:02,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1851738833, now seen corresponding path program 26 times [2022-03-01 18:40:02,136 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:40:02,136 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427242903] [2022-03-01 18:40:02,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:40:02,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:40:02,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:40:02,453 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:40:02,453 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:40:02,453 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427242903] [2022-03-01 18:40:02,453 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427242903] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:40:02,453 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120040944] [2022-03-01 18:40:02,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:40:02,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:40:02,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:40:02,468 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) [2022-03-01 18:40:02,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-01 18:40:02,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:40:02,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:40:02,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-01 18:40:02,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:40:02,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-01 18:40:02,682 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-03-01 18:40:02,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-03-01 18:40:02,885 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-01 18:40:02,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:40:02,953 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-03-01 18:40:02,953 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 26 [2022-03-01 18:40:03,149 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-01 18:40:03,149 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120040944] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:40:03,149 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:40:03,149 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 27 [2022-03-01 18:40:03,149 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187805905] [2022-03-01 18:40:03,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:40:03,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 18:40:03,150 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:40:03,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 18:40:03,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2022-03-01 18:40:03,150 INFO L87 Difference]: Start difference. First operand 1669 states and 5755 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:40:13,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:40:13,502 INFO L93 Difference]: Finished difference Result 5759 states and 17999 transitions. [2022-03-01 18:40:13,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 227 states. [2022-03-01 18:40:13,507 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 18:40:13,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:40:13,519 INFO L225 Difference]: With dead ends: 5759 [2022-03-01 18:40:13,519 INFO L226 Difference]: Without dead ends: 5521 [2022-03-01 18:40:13,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24477 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=6244, Invalid=49688, Unknown=0, NotChecked=0, Total=55932 [2022-03-01 18:40:13,522 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 891 mSDsluCounter, 1625 mSDsCounter, 0 mSdLazyCounter, 1475 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 891 SdHoareTripleChecker+Valid, 919 SdHoareTripleChecker+Invalid, 5007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 1475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3320 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 18:40:13,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [891 Valid, 919 Invalid, 5007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 1475 Invalid, 0 Unknown, 3320 Unchecked, 0.8s Time] [2022-03-01 18:40:13,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5521 states. [2022-03-01 18:40:13,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5521 to 2289. [2022-03-01 18:40:13,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2289 states, 2288 states have (on average 3.513986013986014) internal successors, (8040), 2288 states have internal predecessors, (8040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:40:13,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2289 states to 2289 states and 8040 transitions. [2022-03-01 18:40:13,602 INFO L78 Accepts]: Start accepts. Automaton has 2289 states and 8040 transitions. Word has length 28 [2022-03-01 18:40:13,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:40:13,602 INFO L470 AbstractCegarLoop]: Abstraction has 2289 states and 8040 transitions. [2022-03-01 18:40:13,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:40:13,602 INFO L276 IsEmpty]: Start isEmpty. Operand 2289 states and 8040 transitions. [2022-03-01 18:40:13,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:40:13,608 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:40:13,608 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:40:13,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-01 18:40:13,831 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 [2022-03-01 18:40:13,832 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:40:13,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:40:13,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1976681611, now seen corresponding path program 7 times [2022-03-01 18:40:13,832 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:40:13,832 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563841710] [2022-03-01 18:40:13,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:40:13,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:40:13,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:40:14,078 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:40:14,078 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:40:14,078 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563841710] [2022-03-01 18:40:14,078 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563841710] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:40:14,078 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814866281] [2022-03-01 18:40:14,078 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:40:14,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:40:14,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:40:14,079 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) [2022-03-01 18:40:14,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-01 18:40:14,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:40:14,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-01 18:40:14,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:40:14,339 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-01 18:40:14,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:40:14,387 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-03-01 18:40:14,444 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:40:14,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:40:14,474 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-03-01 18:40:14,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 26 [2022-03-01 18:40:14,721 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:40:14,721 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814866281] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:40:14,721 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:40:14,721 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2022-03-01 18:40:14,722 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752262852] [2022-03-01 18:40:14,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:40:14,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 18:40:14,722 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:40:14,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 18:40:14,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=801, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:40:14,722 INFO L87 Difference]: Start difference. First operand 2289 states and 8040 transitions. Second operand has 32 states, 32 states have (on average 2.28125) 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) [2022-03-01 18:40:16,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:40:16,290 INFO L93 Difference]: Finished difference Result 4514 states and 14306 transitions. [2022-03-01 18:40:16,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-01 18:40:16,291 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.28125) 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 28 [2022-03-01 18:40:16,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:40:16,298 INFO L225 Difference]: With dead ends: 4514 [2022-03-01 18:40:16,298 INFO L226 Difference]: Without dead ends: 3964 [2022-03-01 18:40:16,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1339 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=802, Invalid=3358, Unknown=0, NotChecked=0, Total=4160 [2022-03-01 18:40:16,299 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 542 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 1276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 328 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:40:16,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [542 Valid, 291 Invalid, 1276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 794 Invalid, 0 Unknown, 328 Unchecked, 0.4s Time] [2022-03-01 18:40:16,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3964 states. [2022-03-01 18:40:16,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3964 to 2294. [2022-03-01 18:40:16,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2294 states, 2293 states have (on average 3.4888791975577846) internal successors, (8000), 2293 states have internal predecessors, (8000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:40:16,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2294 states to 2294 states and 8000 transitions. [2022-03-01 18:40:16,348 INFO L78 Accepts]: Start accepts. Automaton has 2294 states and 8000 transitions. Word has length 28 [2022-03-01 18:40:16,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:40:16,348 INFO L470 AbstractCegarLoop]: Abstraction has 2294 states and 8000 transitions. [2022-03-01 18:40:16,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.28125) 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) [2022-03-01 18:40:16,348 INFO L276 IsEmpty]: Start isEmpty. Operand 2294 states and 8000 transitions. [2022-03-01 18:40:16,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:40:16,352 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:40:16,352 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:40:16,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-01 18:40:16,568 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 [2022-03-01 18:40:16,568 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:40:16,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:40:16,569 INFO L85 PathProgramCache]: Analyzing trace with hash 114975881, now seen corresponding path program 8 times [2022-03-01 18:40:16,569 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:40:16,569 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209230428] [2022-03-01 18:40:16,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:40:16,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:40:16,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:40:16,939 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:40:16,940 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:40:16,940 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209230428] [2022-03-01 18:40:16,940 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209230428] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:40:16,940 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617466138] [2022-03-01 18:40:16,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:40:16,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:40:16,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:40:16,941 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) [2022-03-01 18:40:16,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-01 18:40:16,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:40:16,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:40:16,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 18:40:16,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:40:17,120 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-01 18:40:17,225 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-03-01 18:40:17,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-03-01 18:40:17,318 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-01 18:40:17,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:40:17,412 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-03-01 18:40:17,413 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 26 [2022-03-01 18:40:17,590 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-01 18:40:17,590 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617466138] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:40:17,590 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:40:17,590 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 28 [2022-03-01 18:40:17,590 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172235548] [2022-03-01 18:40:17,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:40:17,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 18:40:17,591 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:40:17,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 18:40:17,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2022-03-01 18:40:17,591 INFO L87 Difference]: Start difference. First operand 2294 states and 8000 transitions. Second operand has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:40:18,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:40:18,981 INFO L93 Difference]: Finished difference Result 3130 states and 10228 transitions. [2022-03-01 18:40:18,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-01 18:40:18,982 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 18:40:18,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:40:18,988 INFO L225 Difference]: With dead ends: 3130 [2022-03-01 18:40:18,988 INFO L226 Difference]: Without dead ends: 3112 [2022-03-01 18:40:18,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 833 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=586, Invalid=2954, Unknown=0, NotChecked=0, Total=3540 [2022-03-01 18:40:18,989 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 408 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 1201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 552 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:40:18,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [408 Valid, 354 Invalid, 1201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 582 Invalid, 0 Unknown, 552 Unchecked, 0.3s Time] [2022-03-01 18:40:18,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3112 states. [2022-03-01 18:40:19,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3112 to 2324. [2022-03-01 18:40:19,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2324 states, 2323 states have (on average 3.484287559190702) internal successors, (8094), 2323 states have internal predecessors, (8094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:40:19,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2324 states to 2324 states and 8094 transitions. [2022-03-01 18:40:19,035 INFO L78 Accepts]: Start accepts. Automaton has 2324 states and 8094 transitions. Word has length 28 [2022-03-01 18:40:19,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:40:19,035 INFO L470 AbstractCegarLoop]: Abstraction has 2324 states and 8094 transitions. [2022-03-01 18:40:19,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:40:19,035 INFO L276 IsEmpty]: Start isEmpty. Operand 2324 states and 8094 transitions. [2022-03-01 18:40:19,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:40:19,039 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:40:19,040 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:40:19,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-01 18:40:19,255 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 [2022-03-01 18:40:19,255 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:40:19,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:40:19,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1675136757, now seen corresponding path program 9 times [2022-03-01 18:40:19,256 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:40:19,256 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290445286] [2022-03-01 18:40:19,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:40:19,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:40:19,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:40:19,537 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:40:19,537 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:40:19,537 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290445286] [2022-03-01 18:40:19,537 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290445286] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:40:19,537 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923493849] [2022-03-01 18:40:19,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:40:19,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:40:19,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:40:19,548 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) [2022-03-01 18:40:19,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-01 18:40:19,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 18:40:19,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:40:19,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-01 18:40:19,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:40:19,751 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-01 18:40:19,876 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-03-01 18:40:19,877 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-03-01 18:40:20,039 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-01 18:40:20,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:40:20,134 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-03-01 18:40:20,134 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 26 [2022-03-01 18:40:20,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-01 18:40:20,297 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923493849] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:40:20,297 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:40:20,297 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 27 [2022-03-01 18:40:20,297 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808346473] [2022-03-01 18:40:20,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:40:20,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 18:40:20,297 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:40:20,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 18:40:20,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2022-03-01 18:40:20,299 INFO L87 Difference]: Start difference. First operand 2324 states and 8094 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:40:21,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:40:21,984 INFO L93 Difference]: Finished difference Result 3157 states and 10316 transitions. [2022-03-01 18:40:21,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-01 18:40:21,985 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 18:40:21,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:40:22,011 INFO L225 Difference]: With dead ends: 3157 [2022-03-01 18:40:22,011 INFO L226 Difference]: Without dead ends: 3121 [2022-03-01 18:40:22,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=540, Invalid=2766, Unknown=0, NotChecked=0, Total=3306 [2022-03-01 18:40:22,011 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 389 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 1606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 947 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:40:22,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [389 Valid, 359 Invalid, 1606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 595 Invalid, 0 Unknown, 947 Unchecked, 0.3s Time] [2022-03-01 18:40:22,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3121 states. [2022-03-01 18:40:22,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3121 to 2355. [2022-03-01 18:40:22,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2355 states, 2354 states have (on average 3.4766355140186915) internal successors, (8184), 2354 states have internal predecessors, (8184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:40:22,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2355 states to 2355 states and 8184 transitions. [2022-03-01 18:40:22,048 INFO L78 Accepts]: Start accepts. Automaton has 2355 states and 8184 transitions. Word has length 28 [2022-03-01 18:40:22,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:40:22,049 INFO L470 AbstractCegarLoop]: Abstraction has 2355 states and 8184 transitions. [2022-03-01 18:40:22,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:40:22,049 INFO L276 IsEmpty]: Start isEmpty. Operand 2355 states and 8184 transitions. [2022-03-01 18:40:22,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:40:22,053 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:40:22,053 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:40:22,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-01 18:40:22,269 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 [2022-03-01 18:40:22,270 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:40:22,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:40:22,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1315804659, now seen corresponding path program 10 times [2022-03-01 18:40:22,270 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:40:22,270 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289902090] [2022-03-01 18:40:22,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:40:22,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:40:22,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:40:22,527 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:40:22,527 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:40:22,527 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289902090] [2022-03-01 18:40:22,527 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289902090] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:40:22,527 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607561778] [2022-03-01 18:40:22,528 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:40:22,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:40:22,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:40:22,529 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) [2022-03-01 18:40:22,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-01 18:40:22,561 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:40:22,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:40:22,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-01 18:40:22,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:40:22,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-01 18:40:22,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:40:22,855 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-03-01 18:40:22,951 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:40:22,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:40:23,010 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-03-01 18:40:23,010 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 26 [2022-03-01 18:40:23,327 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:40:23,327 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607561778] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:40:23,327 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:40:23,327 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2022-03-01 18:40:23,328 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279341314] [2022-03-01 18:40:23,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:40:23,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 18:40:23,328 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:40:23,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 18:40:23,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:40:23,329 INFO L87 Difference]: Start difference. First operand 2355 states and 8184 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:40:25,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:40:25,801 INFO L93 Difference]: Finished difference Result 5240 states and 16371 transitions. [2022-03-01 18:40:25,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-01 18:40:25,801 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 18:40:25,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:40:25,811 INFO L225 Difference]: With dead ends: 5240 [2022-03-01 18:40:25,811 INFO L226 Difference]: Without dead ends: 5044 [2022-03-01 18:40:25,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1726 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1015, Invalid=4241, Unknown=0, NotChecked=0, Total=5256 [2022-03-01 18:40:25,812 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 707 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 707 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 1265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 171 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:40:25,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [707 Valid, 309 Invalid, 1265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 888 Invalid, 0 Unknown, 171 Unchecked, 0.5s Time] [2022-03-01 18:40:25,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5044 states. [2022-03-01 18:40:25,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5044 to 2447. [2022-03-01 18:40:25,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2447 states, 2446 states have (on average 3.4603434178250203) internal successors, (8464), 2446 states have internal predecessors, (8464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:40:25,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2447 states to 2447 states and 8464 transitions. [2022-03-01 18:40:25,892 INFO L78 Accepts]: Start accepts. Automaton has 2447 states and 8464 transitions. Word has length 28 [2022-03-01 18:40:25,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:40:25,892 INFO L470 AbstractCegarLoop]: Abstraction has 2447 states and 8464 transitions. [2022-03-01 18:40:25,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:40:25,892 INFO L276 IsEmpty]: Start isEmpty. Operand 2447 states and 8464 transitions. [2022-03-01 18:40:25,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:40:25,897 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:40:25,897 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:40:25,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-01 18:40:26,113 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 [2022-03-01 18:40:26,113 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:40:26,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:40:26,113 INFO L85 PathProgramCache]: Analyzing trace with hash 114198423, now seen corresponding path program 11 times [2022-03-01 18:40:26,114 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:40:26,114 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967168639] [2022-03-01 18:40:26,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:40:26,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:40:26,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:40:26,320 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:40:26,321 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:40:26,321 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967168639] [2022-03-01 18:40:26,321 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967168639] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:40:26,321 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455305692] [2022-03-01 18:40:26,321 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:40:26,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:40:26,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:40:26,322 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) [2022-03-01 18:40:26,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-01 18:40:26,354 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:40:26,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:40:26,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 18:40:26,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:40:26,499 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-01 18:40:26,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:40:26,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-03-01 18:40:26,603 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:40:26,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:40:26,647 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-03-01 18:40:26,648 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 26 [2022-03-01 18:40:26,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:40:26,891 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455305692] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:40:26,891 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:40:26,891 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 34 [2022-03-01 18:40:26,891 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993928570] [2022-03-01 18:40:26,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:40:26,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-01 18:40:26,892 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:40:26,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-01 18:40:26,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 18:40:26,892 INFO L87 Difference]: Start difference. First operand 2447 states and 8464 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 34 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:40:28,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:40:28,992 INFO L93 Difference]: Finished difference Result 4592 states and 14339 transitions. [2022-03-01 18:40:28,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-01 18:40:28,992 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 34 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 18:40:28,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:40:29,000 INFO L225 Difference]: With dead ends: 4592 [2022-03-01 18:40:29,000 INFO L226 Difference]: Without dead ends: 3982 [2022-03-01 18:40:29,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2599 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1266, Invalid=7290, Unknown=0, NotChecked=0, Total=8556 [2022-03-01 18:40:29,001 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 539 mSDsluCounter, 739 mSDsCounter, 0 mSdLazyCounter, 1311 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 1546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:40:29,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [539 Valid, 450 Invalid, 1546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1311 Invalid, 0 Unknown, 105 Unchecked, 0.5s Time] [2022-03-01 18:40:29,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3982 states. [2022-03-01 18:40:29,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3982 to 2437. [2022-03-01 18:40:29,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2437 states, 2436 states have (on average 3.4564860426929394) internal successors, (8420), 2436 states have internal predecessors, (8420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:40:29,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2437 states to 2437 states and 8420 transitions. [2022-03-01 18:40:29,057 INFO L78 Accepts]: Start accepts. Automaton has 2437 states and 8420 transitions. Word has length 28 [2022-03-01 18:40:29,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:40:29,057 INFO L470 AbstractCegarLoop]: Abstraction has 2437 states and 8420 transitions. [2022-03-01 18:40:29,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 34 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:40:29,057 INFO L276 IsEmpty]: Start isEmpty. Operand 2437 states and 8420 transitions. [2022-03-01 18:40:29,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:40:29,062 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:40:29,062 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:40:29,078 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-03-01 18:40:29,267 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 [2022-03-01 18:40:29,267 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:40:29,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:40:29,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1910068349, now seen corresponding path program 12 times [2022-03-01 18:40:29,268 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:40:29,268 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167134960] [2022-03-01 18:40:29,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:40:29,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:40:29,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:40:29,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:40:29,626 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:40:29,626 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167134960] [2022-03-01 18:40:29,626 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167134960] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:40:29,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153044766] [2022-03-01 18:40:29,627 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:40:29,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:40:29,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:40:29,628 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) [2022-03-01 18:40:29,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-01 18:40:29,661 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:40:29,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:40:29,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 18:40:29,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:40:29,793 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-01 18:40:29,835 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-03-01 18:40:29,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-03-01 18:40:29,949 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 18:40:29,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:40:30,048 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-03-01 18:40:30,048 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 26 [2022-03-01 18:40:30,207 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 18:40:30,208 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153044766] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:40:30,208 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:40:30,208 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 28 [2022-03-01 18:40:30,208 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035657097] [2022-03-01 18:40:30,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:40:30,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 18:40:30,208 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:40:30,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 18:40:30,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2022-03-01 18:40:30,209 INFO L87 Difference]: Start difference. First operand 2437 states and 8420 transitions. Second operand has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 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) [2022-03-01 18:40:32,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:40:32,377 INFO L93 Difference]: Finished difference Result 5107 states and 16349 transitions. [2022-03-01 18:40:32,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-01 18:40:32,378 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 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 28 [2022-03-01 18:40:32,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:40:32,386 INFO L225 Difference]: With dead ends: 5107 [2022-03-01 18:40:32,386 INFO L226 Difference]: Without dead ends: 5003 [2022-03-01 18:40:32,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1411 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=898, Invalid=4214, Unknown=0, NotChecked=0, Total=5112 [2022-03-01 18:40:32,405 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 535 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 1254 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 1597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 213 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:40:32,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [535 Valid, 291 Invalid, 1597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1254 Invalid, 0 Unknown, 213 Unchecked, 0.7s Time] [2022-03-01 18:40:32,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5003 states. [2022-03-01 18:40:32,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5003 to 2590. [2022-03-01 18:40:32,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2590 states, 2589 states have (on average 3.467361915797605) internal successors, (8977), 2589 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) [2022-03-01 18:40:32,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2590 states to 2590 states and 8977 transitions. [2022-03-01 18:40:32,455 INFO L78 Accepts]: Start accepts. Automaton has 2590 states and 8977 transitions. Word has length 28 [2022-03-01 18:40:32,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:40:32,455 INFO L470 AbstractCegarLoop]: Abstraction has 2590 states and 8977 transitions. [2022-03-01 18:40:32,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 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) [2022-03-01 18:40:32,455 INFO L276 IsEmpty]: Start isEmpty. Operand 2590 states and 8977 transitions. [2022-03-01 18:40:32,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:40:32,459 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:40:32,459 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:40:32,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-01 18:40:32,675 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 [2022-03-01 18:40:32,675 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:40:32,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:40:32,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1658751993, now seen corresponding path program 13 times [2022-03-01 18:40:32,675 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:40:32,675 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547136336] [2022-03-01 18:40:32,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:40:32,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:40:32,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:40:32,959 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:40:32,960 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:40:32,960 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547136336] [2022-03-01 18:40:32,960 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547136336] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:40:32,960 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340174328] [2022-03-01 18:40:32,960 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:40:32,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:40:32,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:40:32,961 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) [2022-03-01 18:40:32,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-01 18:40:33,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:40:33,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-01 18:40:33,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:40:33,161 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-01 18:40:33,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:40:33,227 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-03-01 18:40:33,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:40:33,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:40:33,344 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-03-01 18:40:33,344 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 26 [2022-03-01 18:40:33,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:40:33,548 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340174328] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:40:33,548 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:40:33,549 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2022-03-01 18:40:33,549 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934170892] [2022-03-01 18:40:33,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:40:33,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 18:40:33,549 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:40:33,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 18:40:33,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=811, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:40:33,549 INFO L87 Difference]: Start difference. First operand 2590 states and 8977 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:40:37,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:40:37,573 INFO L93 Difference]: Finished difference Result 7272 states and 22400 transitions. [2022-03-01 18:40:37,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-03-01 18:40:37,573 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 18:40:37,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:40:37,585 INFO L225 Difference]: With dead ends: 7272 [2022-03-01 18:40:37,585 INFO L226 Difference]: Without dead ends: 6253 [2022-03-01 18:40:37,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 35 SyntacticMatches, 7 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4695 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2043, Invalid=9729, Unknown=0, NotChecked=0, Total=11772 [2022-03-01 18:40:37,586 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 751 mSDsluCounter, 970 mSDsCounter, 0 mSdLazyCounter, 1320 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 751 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 1923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 437 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:40:37,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [751 Valid, 590 Invalid, 1923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1320 Invalid, 0 Unknown, 437 Unchecked, 0.6s Time] [2022-03-01 18:40:37,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6253 states. [2022-03-01 18:40:37,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6253 to 2336. [2022-03-01 18:40:37,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2336 states, 2335 states have (on average 3.5190578158458243) internal successors, (8217), 2335 states have internal predecessors, (8217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:40:37,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2336 states to 2336 states and 8217 transitions. [2022-03-01 18:40:37,651 INFO L78 Accepts]: Start accepts. Automaton has 2336 states and 8217 transitions. Word has length 28 [2022-03-01 18:40:37,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:40:37,651 INFO L470 AbstractCegarLoop]: Abstraction has 2336 states and 8217 transitions. [2022-03-01 18:40:37,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:40:37,651 INFO L276 IsEmpty]: Start isEmpty. Operand 2336 states and 8217 transitions. [2022-03-01 18:40:37,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:40:37,656 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:40:37,656 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:40:37,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-01 18:40:37,859 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 [2022-03-01 18:40:37,859 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:40:37,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:40:37,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1985955337, now seen corresponding path program 14 times [2022-03-01 18:40:37,860 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:40:37,860 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674142021] [2022-03-01 18:40:37,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:40:37,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:40:37,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:40:38,082 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:40:38,082 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:40:38,083 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674142021] [2022-03-01 18:40:38,083 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674142021] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:40:38,083 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217077050] [2022-03-01 18:40:38,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:40:38,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:40:38,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:40:38,084 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) [2022-03-01 18:40:38,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-01 18:40:38,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:40:38,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:40:38,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 18:40:38,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:40:38,303 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-01 18:40:38,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:40:38,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-03-01 18:40:38,600 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:40:38,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:40:38,719 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-03-01 18:40:38,720 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 26 [2022-03-01 18:40:39,010 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:40:39,010 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217077050] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:40:39,010 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:40:39,011 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 30 [2022-03-01 18:40:39,011 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092835408] [2022-03-01 18:40:39,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:40:39,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 18:40:39,011 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:40:39,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 18:40:39,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:40:39,011 INFO L87 Difference]: Start difference. First operand 2336 states and 8217 transitions. Second operand has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 30 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) [2022-03-01 18:40:43,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:40:43,921 INFO L93 Difference]: Finished difference Result 6744 states and 20808 transitions. [2022-03-01 18:40:43,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-03-01 18:40:43,921 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 30 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 28 [2022-03-01 18:40:43,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:40:43,932 INFO L225 Difference]: With dead ends: 6744 [2022-03-01 18:40:43,932 INFO L226 Difference]: Without dead ends: 6046 [2022-03-01 18:40:43,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3961 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1746, Invalid=10026, Unknown=0, NotChecked=0, Total=11772 [2022-03-01 18:40:43,933 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 707 mSDsluCounter, 811 mSDsCounter, 0 mSdLazyCounter, 1947 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 707 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 2316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 1947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 215 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 18:40:43,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [707 Valid, 501 Invalid, 2316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 1947 Invalid, 0 Unknown, 215 Unchecked, 0.9s Time] [2022-03-01 18:40:43,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6046 states. [2022-03-01 18:40:44,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6046 to 2663. [2022-03-01 18:40:44,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2663 states, 2662 states have (on average 3.477460555972953) internal successors, (9257), 2662 states have internal predecessors, (9257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:40:44,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2663 states to 2663 states and 9257 transitions. [2022-03-01 18:40:44,029 INFO L78 Accepts]: Start accepts. Automaton has 2663 states and 9257 transitions. Word has length 28 [2022-03-01 18:40:44,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:40:44,029 INFO L470 AbstractCegarLoop]: Abstraction has 2663 states and 9257 transitions. [2022-03-01 18:40:44,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 30 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) [2022-03-01 18:40:44,030 INFO L276 IsEmpty]: Start isEmpty. Operand 2663 states and 9257 transitions. [2022-03-01 18:40:44,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:40:44,034 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:40:44,034 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:40:44,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-01 18:40:44,247 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 [2022-03-01 18:40:44,247 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:40:44,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:40:44,248 INFO L85 PathProgramCache]: Analyzing trace with hash 343870545, now seen corresponding path program 15 times [2022-03-01 18:40:44,248 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:40:44,248 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311803141] [2022-03-01 18:40:44,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:40:44,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:40:44,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:40:44,573 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:40:44,573 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:40:44,573 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311803141] [2022-03-01 18:40:44,573 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311803141] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:40:44,573 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074595256] [2022-03-01 18:40:44,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:40:44,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:40:44,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:40:44,574 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) [2022-03-01 18:40:44,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-01 18:40:44,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 18:40:44,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:40:44,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-01 18:40:44,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:40:44,721 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-01 18:40:44,763 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-03-01 18:40:44,763 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-03-01 18:40:44,874 INFO L353 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-03-01 18:40:44,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 26 [2022-03-01 18:40:44,970 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:40:44,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:40:45,096 INFO L353 Elim1Store]: treesize reduction 5, result has 80.0 percent of original size [2022-03-01 18:40:45,096 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 34 [2022-03-01 18:40:45,105 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:40:45,107 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 94 [2022-03-01 18:40:45,302 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:40:45,303 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074595256] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:40:45,303 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:40:45,303 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 31 [2022-03-01 18:40:45,303 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709373502] [2022-03-01 18:40:45,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:40:45,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 18:40:45,303 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:40:45,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 18:40:45,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:40:45,304 INFO L87 Difference]: Start difference. First operand 2663 states and 9257 transitions. Second operand has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:40:48,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:40:48,121 INFO L93 Difference]: Finished difference Result 5559 states and 18294 transitions. [2022-03-01 18:40:48,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-01 18:40:48,122 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 18:40:48,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:40:48,132 INFO L225 Difference]: With dead ends: 5559 [2022-03-01 18:40:48,132 INFO L226 Difference]: Without dead ends: 5190 [2022-03-01 18:40:48,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 43 SyntacticMatches, 9 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1630 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=721, Invalid=4681, Unknown=0, NotChecked=0, Total=5402 [2022-03-01 18:40:48,133 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 492 mSDsluCounter, 924 mSDsCounter, 0 mSdLazyCounter, 1698 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 2319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 512 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 18:40:48,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [492 Valid, 526 Invalid, 2319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1698 Invalid, 0 Unknown, 512 Unchecked, 0.8s Time] [2022-03-01 18:40:48,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5190 states. [2022-03-01 18:40:48,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5190 to 3152. [2022-03-01 18:40:48,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3152 states, 3151 states have (on average 3.502697556331323) internal successors, (11037), 3151 states have internal predecessors, (11037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:40:48,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3152 states to 3152 states and 11037 transitions. [2022-03-01 18:40:48,201 INFO L78 Accepts]: Start accepts. Automaton has 3152 states and 11037 transitions. Word has length 28 [2022-03-01 18:40:48,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:40:48,202 INFO L470 AbstractCegarLoop]: Abstraction has 3152 states and 11037 transitions. [2022-03-01 18:40:48,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:40:48,203 INFO L276 IsEmpty]: Start isEmpty. Operand 3152 states and 11037 transitions. [2022-03-01 18:40:48,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:40:48,209 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:40:48,209 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:40:48,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-01 18:40:48,423 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 [2022-03-01 18:40:48,423 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:40:48,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:40:48,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1015948307, now seen corresponding path program 16 times [2022-03-01 18:40:48,424 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:40:48,424 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47495942] [2022-03-01 18:40:48,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:40:48,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:40:48,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:40:48,736 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:40:48,737 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:40:48,737 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47495942] [2022-03-01 18:40:48,737 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47495942] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:40:48,737 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581469628] [2022-03-01 18:40:48,737 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:40:48,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:40:48,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:40:48,738 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) [2022-03-01 18:40:48,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-01 18:40:48,771 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:40:48,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:40:48,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-01 18:40:48,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:40:48,913 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-01 18:40:48,989 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-03-01 18:40:48,989 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-03-01 18:40:49,036 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:40:49,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:40:49,075 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-03-01 18:40:49,075 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 26 [2022-03-01 18:40:49,196 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:40:49,196 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581469628] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:40:49,196 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:40:49,197 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 26 [2022-03-01 18:40:49,197 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585534986] [2022-03-01 18:40:49,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:40:49,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 18:40:49,197 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:40:49,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 18:40:49,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2022-03-01 18:40:49,197 INFO L87 Difference]: Start difference. First operand 3152 states and 11037 transitions. Second operand has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 26 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) [2022-03-01 18:40:49,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:40:49,739 INFO L93 Difference]: Finished difference Result 6285 states and 20866 transitions. [2022-03-01 18:40:49,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 18:40:49,740 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 26 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 28 [2022-03-01 18:40:49,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:40:49,752 INFO L225 Difference]: With dead ends: 6285 [2022-03-01 18:40:49,752 INFO L226 Difference]: Without dead ends: 6055 [2022-03-01 18:40:49,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=316, Invalid=1576, Unknown=0, NotChecked=0, Total=1892 [2022-03-01 18:40:49,753 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 323 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 1059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 558 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:40:49,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 257 Invalid, 1059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 463 Invalid, 0 Unknown, 558 Unchecked, 0.2s Time] [2022-03-01 18:40:49,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6055 states. [2022-03-01 18:40:49,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6055 to 3620. [2022-03-01 18:40:49,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3620 states, 3619 states have (on average 3.4995855208621167) internal successors, (12665), 3619 states have internal predecessors, (12665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:40:49,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3620 states to 3620 states and 12665 transitions. [2022-03-01 18:40:49,845 INFO L78 Accepts]: Start accepts. Automaton has 3620 states and 12665 transitions. Word has length 28 [2022-03-01 18:40:49,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:40:49,846 INFO L470 AbstractCegarLoop]: Abstraction has 3620 states and 12665 transitions. [2022-03-01 18:40:49,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 26 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) [2022-03-01 18:40:49,846 INFO L276 IsEmpty]: Start isEmpty. Operand 3620 states and 12665 transitions. [2022-03-01 18:40:49,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:40:49,853 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:40:49,853 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:40:49,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-01 18:40:50,060 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 [2022-03-01 18:40:50,060 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:40:50,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:40:50,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1605273733, now seen corresponding path program 17 times [2022-03-01 18:40:50,061 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:40:50,061 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570773874] [2022-03-01 18:40:50,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:40:50,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:40:50,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:40:50,367 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:40:50,367 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:40:50,367 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570773874] [2022-03-01 18:40:50,367 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570773874] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:40:50,368 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081456753] [2022-03-01 18:40:50,368 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:40:50,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:40:50,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:40:50,369 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) [2022-03-01 18:40:50,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-01 18:40:50,402 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 18:40:50,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:40:50,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-01 18:40:50,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:40:50,524 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-01 18:40:50,591 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-03-01 18:40:50,591 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-03-01 18:40:50,683 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:40:50,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:40:50,738 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-03-01 18:40:50,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 26 [2022-03-01 18:40:50,901 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:40:50,901 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081456753] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:40:50,901 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:40:50,902 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 26 [2022-03-01 18:40:50,902 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704881397] [2022-03-01 18:40:50,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:40:50,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 18:40:50,902 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:40:50,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 18:40:50,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2022-03-01 18:40:50,902 INFO L87 Difference]: Start difference. First operand 3620 states and 12665 transitions. Second operand has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 26 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) [2022-03-01 18:40:51,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:40:51,653 INFO L93 Difference]: Finished difference Result 6620 states and 22064 transitions. [2022-03-01 18:40:51,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-01 18:40:51,653 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 26 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 28 [2022-03-01 18:40:51,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:40:51,666 INFO L225 Difference]: With dead ends: 6620 [2022-03-01 18:40:51,666 INFO L226 Difference]: Without dead ends: 6238 [2022-03-01 18:40:51,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=347, Invalid=1723, Unknown=0, NotChecked=0, Total=2070 [2022-03-01 18:40:51,668 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 296 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 1014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 408 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:40:51,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 338 Invalid, 1014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 563 Invalid, 0 Unknown, 408 Unchecked, 0.3s Time] [2022-03-01 18:40:51,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6238 states. [2022-03-01 18:40:51,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6238 to 3748. [2022-03-01 18:40:51,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3748 states, 3747 states have (on average 3.493461435815319) internal successors, (13090), 3747 states have internal predecessors, (13090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:40:51,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3748 states to 3748 states and 13090 transitions. [2022-03-01 18:40:51,742 INFO L78 Accepts]: Start accepts. Automaton has 3748 states and 13090 transitions. Word has length 28 [2022-03-01 18:40:51,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:40:51,742 INFO L470 AbstractCegarLoop]: Abstraction has 3748 states and 13090 transitions. [2022-03-01 18:40:51,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 26 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) [2022-03-01 18:40:51,742 INFO L276 IsEmpty]: Start isEmpty. Operand 3748 states and 13090 transitions. [2022-03-01 18:40:51,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:40:51,749 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:40:51,749 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:40:51,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-01 18:40:51,966 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 [2022-03-01 18:40:51,966 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:40:51,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:40:51,966 INFO L85 PathProgramCache]: Analyzing trace with hash 931718669, now seen corresponding path program 18 times [2022-03-01 18:40:51,966 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:40:51,966 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316756407] [2022-03-01 18:40:51,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:40:51,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:40:51,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:40:52,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:40:52,231 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:40:52,231 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316756407] [2022-03-01 18:40:52,231 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316756407] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:40:52,231 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843577404] [2022-03-01 18:40:52,231 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:40:52,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:40:52,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:40:52,232 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) [2022-03-01 18:40:52,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-01 18:40:52,281 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 18:40:52,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:40:52,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 18:40:52,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:40:52,390 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-01 18:40:52,426 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-03-01 18:40:52,426 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-03-01 18:40:52,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:40:52,519 INFO L353 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-03-01 18:40:52,520 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2022-03-01 18:40:52,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:40:52,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:40:52,753 INFO L353 Elim1Store]: treesize reduction 15, result has 69.4 percent of original size [2022-03-01 18:40:52,754 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 22 treesize of output 48 [2022-03-01 18:40:52,977 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:40:52,977 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843577404] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:40:52,977 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:40:52,977 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 34 [2022-03-01 18:40:52,977 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772638967] [2022-03-01 18:40:52,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:40:52,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-01 18:40:52,977 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:40:52,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-01 18:40:52,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=943, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 18:40:52,978 INFO L87 Difference]: Start difference. First operand 3748 states and 13090 transitions. Second operand has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:40:57,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:40:57,369 INFO L93 Difference]: Finished difference Result 7139 states and 22944 transitions. [2022-03-01 18:40:57,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-03-01 18:40:57,370 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 18:40:57,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:40:57,383 INFO L225 Difference]: With dead ends: 7139 [2022-03-01 18:40:57,383 INFO L226 Difference]: Without dead ends: 6600 [2022-03-01 18:40:57,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5129 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2276, Invalid=12244, Unknown=0, NotChecked=0, Total=14520 [2022-03-01 18:40:57,384 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 573 mSDsluCounter, 995 mSDsCounter, 0 mSdLazyCounter, 1713 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 573 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 2919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 1713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1051 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 18:40:57,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [573 Valid, 660 Invalid, 2919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 1713 Invalid, 0 Unknown, 1051 Unchecked, 0.8s Time] [2022-03-01 18:40:57,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6600 states. [2022-03-01 18:40:57,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6600 to 3868. [2022-03-01 18:40:57,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3868 states, 3867 states have (on average 3.507887251099043) internal successors, (13565), 3867 states have internal predecessors, (13565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:40:57,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3868 states to 3868 states and 13565 transitions. [2022-03-01 18:40:57,475 INFO L78 Accepts]: Start accepts. Automaton has 3868 states and 13565 transitions. Word has length 28 [2022-03-01 18:40:57,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:40:57,476 INFO L470 AbstractCegarLoop]: Abstraction has 3868 states and 13565 transitions. [2022-03-01 18:40:57,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:40:57,476 INFO L276 IsEmpty]: Start isEmpty. Operand 3868 states and 13565 transitions. [2022-03-01 18:40:57,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:40:57,485 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:40:57,485 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:40:57,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-01 18:40:57,703 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 [2022-03-01 18:40:57,705 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:40:57,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:40:57,705 INFO L85 PathProgramCache]: Analyzing trace with hash 246162663, now seen corresponding path program 19 times [2022-03-01 18:40:57,706 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:40:57,706 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500095278] [2022-03-01 18:40:57,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:40:57,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:40:57,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:40:57,760 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:40:57,760 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:40:57,760 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500095278] [2022-03-01 18:40:57,761 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500095278] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:40:57,761 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131532744] [2022-03-01 18:40:57,761 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:40:57,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:40:57,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:40:57,776 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) [2022-03-01 18:40:57,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-01 18:40:57,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:40:57,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:40:57,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:40:57,954 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:40:57,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:40:58,096 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:40:58,096 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131532744] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:40:58,096 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:40:58,096 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-01 18:40:58,096 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817808891] [2022-03-01 18:40:58,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:40:58,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 18:40:58,097 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:40:58,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 18:40:58,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2022-03-01 18:40:58,097 INFO L87 Difference]: Start difference. First operand 3868 states and 13565 transitions. Second operand has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:41:03,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:41:03,305 INFO L93 Difference]: Finished difference Result 16600 states and 52297 transitions. [2022-03-01 18:41:03,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 260 states. [2022-03-01 18:41:03,306 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:41:03,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:41:03,337 INFO L225 Difference]: With dead ends: 16600 [2022-03-01 18:41:03,337 INFO L226 Difference]: Without dead ends: 16600 [2022-03-01 18:41:03,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 268 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33128 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=12100, Invalid=60530, Unknown=0, NotChecked=0, Total=72630 [2022-03-01 18:41:03,341 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 1105 mSDsluCounter, 1322 mSDsCounter, 0 mSdLazyCounter, 2526 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1105 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 2747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 2526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:41:03,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1105 Valid, 748 Invalid, 2747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 2526 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-01 18:41:03,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16600 states. [2022-03-01 18:41:03,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16600 to 4468. [2022-03-01 18:41:03,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4468 states, 4467 states have (on average 3.640250727557645) internal successors, (16261), 4467 states have internal predecessors, (16261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:41:03,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4468 states to 4468 states and 16261 transitions. [2022-03-01 18:41:03,516 INFO L78 Accepts]: Start accepts. Automaton has 4468 states and 16261 transitions. Word has length 30 [2022-03-01 18:41:03,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:41:03,516 INFO L470 AbstractCegarLoop]: Abstraction has 4468 states and 16261 transitions. [2022-03-01 18:41:03,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:41:03,517 INFO L276 IsEmpty]: Start isEmpty. Operand 4468 states and 16261 transitions. [2022-03-01 18:41:03,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:41:03,523 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:41:03,523 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:41:03,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-01 18:41:03,727 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 [2022-03-01 18:41:03,727 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:41:03,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:41:03,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1683112665, now seen corresponding path program 20 times [2022-03-01 18:41:03,728 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:41:03,728 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650710084] [2022-03-01 18:41:03,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:41:03,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:41:03,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:41:03,803 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:41:03,803 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:41:03,803 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650710084] [2022-03-01 18:41:03,803 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650710084] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:41:03,803 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702796168] [2022-03-01 18:41:03,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:41:03,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:41:03,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:41:03,805 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) [2022-03-01 18:41:03,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-01 18:41:03,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:41:03,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:41:03,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:41:03,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:41:03,983 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:41:03,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:41:04,125 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:41:04,125 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702796168] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:41:04,125 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:41:04,125 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-01 18:41:04,126 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783220622] [2022-03-01 18:41:04,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:41:04,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 18:41:04,126 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:41:04,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 18:41:04,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2022-03-01 18:41:04,126 INFO L87 Difference]: Start difference. First operand 4468 states and 16261 transitions. Second operand has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 23 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:41:08,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:41:08,690 INFO L93 Difference]: Finished difference Result 16854 states and 52503 transitions. [2022-03-01 18:41:08,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 233 states. [2022-03-01 18:41:08,690 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 23 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:41:08,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:41:08,739 INFO L225 Difference]: With dead ends: 16854 [2022-03-01 18:41:08,739 INFO L226 Difference]: Without dead ends: 16854 [2022-03-01 18:41:08,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27212 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=10717, Invalid=49063, Unknown=0, NotChecked=0, Total=59780 [2022-03-01 18:41:08,742 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 1209 mSDsluCounter, 1232 mSDsCounter, 0 mSdLazyCounter, 2199 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1209 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 2447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 2199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:41:08,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1209 Valid, 766 Invalid, 2447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 2199 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-01 18:41:08,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16854 states. [2022-03-01 18:41:08,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16854 to 4392. [2022-03-01 18:41:08,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4392 states, 4391 states have (on average 3.6178547028011843) internal successors, (15886), 4391 states have internal predecessors, (15886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:41:08,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4392 states to 4392 states and 15886 transitions. [2022-03-01 18:41:08,997 INFO L78 Accepts]: Start accepts. Automaton has 4392 states and 15886 transitions. Word has length 30 [2022-03-01 18:41:08,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:41:08,998 INFO L470 AbstractCegarLoop]: Abstraction has 4392 states and 15886 transitions. [2022-03-01 18:41:08,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 23 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:41:08,998 INFO L276 IsEmpty]: Start isEmpty. Operand 4392 states and 15886 transitions. [2022-03-01 18:41:09,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:41:09,005 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:41:09,005 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:41:09,021 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-03-01 18:41:09,219 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 [2022-03-01 18:41:09,219 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:41:09,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:41:09,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1395922129, now seen corresponding path program 21 times [2022-03-01 18:41:09,220 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:41:09,220 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44417791] [2022-03-01 18:41:09,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:41:09,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:41:09,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:41:09,276 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:41:09,276 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:41:09,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44417791] [2022-03-01 18:41:09,277 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44417791] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:41:09,277 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592696541] [2022-03-01 18:41:09,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:41:09,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:41:09,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:41:09,278 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) [2022-03-01 18:41:09,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-01 18:41:09,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 18:41:09,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:41:09,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:41:09,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:41:09,427 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:41:09,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:41:09,530 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:41:09,530 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592696541] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:41:09,530 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:41:09,530 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-01 18:41:09,531 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698477048] [2022-03-01 18:41:09,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:41:09,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:41:09,531 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:41:09,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:41:09,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:41:09,532 INFO L87 Difference]: Start difference. First operand 4392 states and 15886 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:41:11,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:41:11,840 INFO L93 Difference]: Finished difference Result 12242 states and 38213 transitions. [2022-03-01 18:41:11,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2022-03-01 18:41:11,841 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:41:11,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:41:11,866 INFO L225 Difference]: With dead ends: 12242 [2022-03-01 18:41:11,866 INFO L226 Difference]: Without dead ends: 12242 [2022-03-01 18:41:11,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11117 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4782, Invalid=21300, Unknown=0, NotChecked=0, Total=26082 [2022-03-01 18:41:11,868 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 719 mSDsluCounter, 1054 mSDsCounter, 0 mSdLazyCounter, 1951 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 719 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 2090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 1951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:41:11,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [719 Valid, 644 Invalid, 2090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 1951 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-01 18:41:11,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12242 states. [2022-03-01 18:41:12,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12242 to 4346. [2022-03-01 18:41:12,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4346 states, 4345 states have (on average 3.614729574223245) internal successors, (15706), 4345 states have internal predecessors, (15706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:41:12,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4346 states to 4346 states and 15706 transitions. [2022-03-01 18:41:12,028 INFO L78 Accepts]: Start accepts. Automaton has 4346 states and 15706 transitions. Word has length 30 [2022-03-01 18:41:12,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:41:12,028 INFO L470 AbstractCegarLoop]: Abstraction has 4346 states and 15706 transitions. [2022-03-01 18:41:12,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:41:12,029 INFO L276 IsEmpty]: Start isEmpty. Operand 4346 states and 15706 transitions. [2022-03-01 18:41:12,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:41:12,036 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:41:12,036 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:41:12,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-01 18:41:12,252 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 [2022-03-01 18:41:12,252 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:41:12,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:41:12,253 INFO L85 PathProgramCache]: Analyzing trace with hash -616619543, now seen corresponding path program 22 times [2022-03-01 18:41:12,253 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:41:12,253 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897992671] [2022-03-01 18:41:12,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:41:12,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:41:12,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:41:12,332 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:41:12,332 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:41:12,332 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897992671] [2022-03-01 18:41:12,332 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897992671] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:41:12,332 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660050857] [2022-03-01 18:41:12,332 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:41:12,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:41:12,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:41:12,333 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) [2022-03-01 18:41:12,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-01 18:41:12,395 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:41:12,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:41:12,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:41:12,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:41:12,520 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:41:12,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:41:12,606 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:41:12,607 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660050857] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:41:12,607 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:41:12,607 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-01 18:41:12,607 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031022541] [2022-03-01 18:41:12,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:41:12,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:41:12,607 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:41:12,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:41:12,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:41:12,608 INFO L87 Difference]: Start difference. First operand 4346 states and 15706 transitions. Second operand has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 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) [2022-03-01 18:41:14,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:41:14,759 INFO L93 Difference]: Finished difference Result 11838 states and 37015 transitions. [2022-03-01 18:41:14,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2022-03-01 18:41:14,759 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 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 30 [2022-03-01 18:41:14,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:41:14,784 INFO L225 Difference]: With dead ends: 11838 [2022-03-01 18:41:14,784 INFO L226 Difference]: Without dead ends: 11838 [2022-03-01 18:41:14,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10116 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=4362, Invalid=20444, Unknown=0, NotChecked=0, Total=24806 [2022-03-01 18:41:14,786 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 714 mSDsluCounter, 1097 mSDsCounter, 0 mSdLazyCounter, 1894 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 714 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 2043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 1894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:41:14,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [714 Valid, 635 Invalid, 2043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 1894 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 18:41:14,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11838 states. [2022-03-01 18:41:14,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11838 to 4362. [2022-03-01 18:41:14,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4362 states, 4361 states have (on average 3.60651226782848) internal successors, (15728), 4361 states have internal predecessors, (15728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:41:14,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4362 states to 4362 states and 15728 transitions. [2022-03-01 18:41:14,913 INFO L78 Accepts]: Start accepts. Automaton has 4362 states and 15728 transitions. Word has length 30 [2022-03-01 18:41:14,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:41:14,913 INFO L470 AbstractCegarLoop]: Abstraction has 4362 states and 15728 transitions. [2022-03-01 18:41:14,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 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) [2022-03-01 18:41:14,913 INFO L276 IsEmpty]: Start isEmpty. Operand 4362 states and 15728 transitions. [2022-03-01 18:41:14,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:41:14,920 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:41:14,920 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:41:14,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-01 18:41:15,135 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 [2022-03-01 18:41:15,136 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:41:15,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:41:15,136 INFO L85 PathProgramCache]: Analyzing trace with hash -278477675, now seen corresponding path program 23 times [2022-03-01 18:41:15,136 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:41:15,136 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895920339] [2022-03-01 18:41:15,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:41:15,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:41:15,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:41:15,182 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:41:15,182 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:41:15,182 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895920339] [2022-03-01 18:41:15,182 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895920339] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:41:15,182 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195359897] [2022-03-01 18:41:15,183 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:41:15,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:41:15,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:41:15,184 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) [2022-03-01 18:41:15,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-01 18:41:15,222 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 18:41:15,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:41:15,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:41:15,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:41:15,322 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:41:15,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:41:15,424 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:41:15,424 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195359897] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:41:15,424 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:41:15,424 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 17 [2022-03-01 18:41:15,424 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148905647] [2022-03-01 18:41:15,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:41:15,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 18:41:15,424 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:41:15,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 18:41:15,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-03-01 18:41:15,425 INFO L87 Difference]: Start difference. First operand 4362 states and 15728 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 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) [2022-03-01 18:41:16,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:41:16,770 INFO L93 Difference]: Finished difference Result 10713 states and 33937 transitions. [2022-03-01 18:41:16,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-03-01 18:41:16,771 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 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) Word has length 30 [2022-03-01 18:41:16,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:41:16,793 INFO L225 Difference]: With dead ends: 10713 [2022-03-01 18:41:16,793 INFO L226 Difference]: Without dead ends: 10713 [2022-03-01 18:41:16,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3054 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1779, Invalid=6231, Unknown=0, NotChecked=0, Total=8010 [2022-03-01 18:41:16,794 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 435 mSDsluCounter, 654 mSDsCounter, 0 mSdLazyCounter, 1185 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 1279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:41:16,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [435 Valid, 438 Invalid, 1279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1185 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 18:41:16,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10713 states. [2022-03-01 18:41:16,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10713 to 4397. [2022-03-01 18:41:16,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4397 states, 4396 states have (on average 3.6139672429481347) internal successors, (15887), 4396 states have internal predecessors, (15887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:41:16,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4397 states to 4397 states and 15887 transitions. [2022-03-01 18:41:16,920 INFO L78 Accepts]: Start accepts. Automaton has 4397 states and 15887 transitions. Word has length 30 [2022-03-01 18:41:16,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:41:16,920 INFO L470 AbstractCegarLoop]: Abstraction has 4397 states and 15887 transitions. [2022-03-01 18:41:16,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 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) [2022-03-01 18:41:16,920 INFO L276 IsEmpty]: Start isEmpty. Operand 4397 states and 15887 transitions. [2022-03-01 18:41:16,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:41:16,927 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:41:16,927 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:41:16,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-01 18:41:17,144 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 [2022-03-01 18:41:17,145 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:41:17,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:41:17,145 INFO L85 PathProgramCache]: Analyzing trace with hash 253428639, now seen corresponding path program 24 times [2022-03-01 18:41:17,145 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:41:17,145 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085614491] [2022-03-01 18:41:17,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:41:17,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:41:17,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:41:17,191 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:41:17,191 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:41:17,191 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085614491] [2022-03-01 18:41:17,192 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085614491] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:41:17,192 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547798368] [2022-03-01 18:41:17,192 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:41:17,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:41:17,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:41:17,196 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) [2022-03-01 18:41:17,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-01 18:41:17,236 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 18:41:17,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:41:17,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-01 18:41:17,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:41:17,336 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-01 18:41:17,394 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-03-01 18:41:17,395 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-03-01 18:41:17,516 INFO L353 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2022-03-01 18:41:17,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2022-03-01 18:41:17,665 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 18:41:17,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:41:17,796 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-03-01 18:41:17,796 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 26 [2022-03-01 18:41:17,956 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 18:41:17,957 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547798368] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:41:17,957 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:41:17,957 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 24 [2022-03-01 18:41:17,957 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64350421] [2022-03-01 18:41:17,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:41:17,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 18:41:17,957 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:41:17,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 18:41:17,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-03-01 18:41:17,958 INFO L87 Difference]: Start difference. First operand 4397 states and 15887 transitions. Second operand has 24 states, 24 states have (on average 3.2916666666666665) internal successors, (79), 24 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) [2022-03-01 18:41:22,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:41:22,633 INFO L93 Difference]: Finished difference Result 10822 states and 34699 transitions. [2022-03-01 18:41:22,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 219 states. [2022-03-01 18:41:22,633 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.2916666666666665) internal successors, (79), 24 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 30 [2022-03-01 18:41:22,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:41:22,659 INFO L225 Difference]: With dead ends: 10822 [2022-03-01 18:41:22,660 INFO L226 Difference]: Without dead ends: 10443 [2022-03-01 18:41:22,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21050 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5773, Invalid=45529, Unknown=0, NotChecked=0, Total=51302 [2022-03-01 18:41:22,664 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 719 mSDsluCounter, 1974 mSDsCounter, 0 mSdLazyCounter, 2471 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 719 SdHoareTripleChecker+Valid, 1175 SdHoareTripleChecker+Invalid, 3388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 2471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 770 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 18:41:22,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [719 Valid, 1175 Invalid, 3388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 2471 Invalid, 0 Unknown, 770 Unchecked, 0.9s Time] [2022-03-01 18:41:22,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10443 states. [2022-03-01 18:41:22,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10443 to 4539. [2022-03-01 18:41:22,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4539 states, 4538 states have (on average 3.626707800793301) internal successors, (16458), 4538 states have internal predecessors, (16458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:41:22,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4539 states to 4539 states and 16458 transitions. [2022-03-01 18:41:22,835 INFO L78 Accepts]: Start accepts. Automaton has 4539 states and 16458 transitions. Word has length 30 [2022-03-01 18:41:22,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:41:22,835 INFO L470 AbstractCegarLoop]: Abstraction has 4539 states and 16458 transitions. [2022-03-01 18:41:22,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.2916666666666665) internal successors, (79), 24 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) [2022-03-01 18:41:22,835 INFO L276 IsEmpty]: Start isEmpty. Operand 4539 states and 16458 transitions. [2022-03-01 18:41:22,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:41:22,843 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:41:22,843 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:41:22,859 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-03-01 18:41:23,050 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 [2022-03-01 18:41:23,050 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:41:23,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:41:23,051 INFO L85 PathProgramCache]: Analyzing trace with hash -26538439, now seen corresponding path program 25 times [2022-03-01 18:41:23,051 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:41:23,051 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544958366] [2022-03-01 18:41:23,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:41:23,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:41:23,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:41:23,105 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:41:23,105 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:41:23,105 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544958366] [2022-03-01 18:41:23,105 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544958366] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:41:23,106 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990036528] [2022-03-01 18:41:23,106 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:41:23,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:41:23,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:41:23,107 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) [2022-03-01 18:41:23,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-01 18:41:23,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:41:23,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:41:23,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:41:23,246 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:41:23,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:41:23,341 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:41:23,341 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990036528] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:41:23,342 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:41:23,342 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 19 [2022-03-01 18:41:23,342 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676719892] [2022-03-01 18:41:23,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:41:23,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 18:41:23,342 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:41:23,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 18:41:23,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2022-03-01 18:41:23,343 INFO L87 Difference]: Start difference. First operand 4539 states and 16458 transitions. Second operand has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:41:25,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:41:25,236 INFO L93 Difference]: Finished difference Result 11273 states and 35289 transitions. [2022-03-01 18:41:25,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-03-01 18:41:25,237 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:41:25,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:41:25,259 INFO L225 Difference]: With dead ends: 11273 [2022-03-01 18:41:25,259 INFO L226 Difference]: Without dead ends: 11273 [2022-03-01 18:41:25,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7163 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3292, Invalid=14264, Unknown=0, NotChecked=0, Total=17556 [2022-03-01 18:41:25,265 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 583 mSDsluCounter, 889 mSDsCounter, 0 mSdLazyCounter, 1574 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 583 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 1665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:41:25,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [583 Valid, 566 Invalid, 1665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1574 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 18:41:25,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11273 states. [2022-03-01 18:41:25,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11273 to 4555. [2022-03-01 18:41:25,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4555 states, 4554 states have (on average 3.6280193236714977) internal successors, (16522), 4554 states have internal predecessors, (16522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:41:25,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4555 states to 4555 states and 16522 transitions. [2022-03-01 18:41:25,435 INFO L78 Accepts]: Start accepts. Automaton has 4555 states and 16522 transitions. Word has length 30 [2022-03-01 18:41:25,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:41:25,435 INFO L470 AbstractCegarLoop]: Abstraction has 4555 states and 16522 transitions. [2022-03-01 18:41:25,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:41:25,436 INFO L276 IsEmpty]: Start isEmpty. Operand 4555 states and 16522 transitions. [2022-03-01 18:41:25,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:41:25,443 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:41:25,443 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:41:25,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-01 18:41:25,658 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 [2022-03-01 18:41:25,659 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:41:25,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:41:25,659 INFO L85 PathProgramCache]: Analyzing trace with hash 832947317, now seen corresponding path program 26 times [2022-03-01 18:41:25,659 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:41:25,659 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959873793] [2022-03-01 18:41:25,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:41:25,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:41:25,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:41:25,704 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:41:25,705 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:41:25,705 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959873793] [2022-03-01 18:41:25,705 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959873793] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:41:25,705 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065155532] [2022-03-01 18:41:25,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:41:25,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:41:25,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:41:25,706 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) [2022-03-01 18:41:25,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-01 18:41:25,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:41:25,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:41:25,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:41:25,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:41:25,879 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:41:25,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:41:26,004 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:41:26,004 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065155532] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:41:26,004 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:41:26,004 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 21 [2022-03-01 18:41:26,005 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835562777] [2022-03-01 18:41:26,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:41:26,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:41:26,005 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:41:26,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:41:26,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:41:26,005 INFO L87 Difference]: Start difference. First operand 4555 states and 16522 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:41:28,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:41:28,957 INFO L93 Difference]: Finished difference Result 12074 states and 37513 transitions. [2022-03-01 18:41:28,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2022-03-01 18:41:28,958 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:41:28,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:41:28,979 INFO L225 Difference]: With dead ends: 12074 [2022-03-01 18:41:28,979 INFO L226 Difference]: Without dead ends: 12074 [2022-03-01 18:41:28,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15940 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5934, Invalid=30356, Unknown=0, NotChecked=0, Total=36290 [2022-03-01 18:41:28,981 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 710 mSDsluCounter, 1077 mSDsCounter, 0 mSdLazyCounter, 1817 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 710 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 1947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 18:41:28,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [710 Valid, 660 Invalid, 1947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1817 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-01 18:41:28,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12074 states. [2022-03-01 18:41:29,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12074 to 4635. [2022-03-01 18:41:29,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4635 states, 4634 states have (on average 3.622356495468278) internal successors, (16786), 4634 states have internal predecessors, (16786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:41:29,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4635 states to 4635 states and 16786 transitions. [2022-03-01 18:41:29,138 INFO L78 Accepts]: Start accepts. Automaton has 4635 states and 16786 transitions. Word has length 30 [2022-03-01 18:41:29,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:41:29,138 INFO L470 AbstractCegarLoop]: Abstraction has 4635 states and 16786 transitions. [2022-03-01 18:41:29,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:41:29,139 INFO L276 IsEmpty]: Start isEmpty. Operand 4635 states and 16786 transitions. [2022-03-01 18:41:29,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:41:29,148 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:41:29,149 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:41:29,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-01 18:41:29,368 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 [2022-03-01 18:41:29,368 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:41:29,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:41:29,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1958548217, now seen corresponding path program 27 times [2022-03-01 18:41:29,368 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:41:29,368 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016502510] [2022-03-01 18:41:29,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:41:29,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:41:29,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:41:29,421 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:41:29,421 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:41:29,421 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016502510] [2022-03-01 18:41:29,421 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016502510] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:41:29,421 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445065263] [2022-03-01 18:41:29,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:41:29,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:41:29,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:41:29,423 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) [2022-03-01 18:41:29,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-01 18:41:29,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-01 18:41:29,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:41:29,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:41:29,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:41:29,617 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:41:29,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:41:29,748 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:41:29,748 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445065263] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:41:29,748 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:41:29,748 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 21 [2022-03-01 18:41:29,748 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277255159] [2022-03-01 18:41:29,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:41:29,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:41:29,749 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:41:29,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:41:29,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:41:29,749 INFO L87 Difference]: Start difference. First operand 4635 states and 16786 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:41:31,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:41:31,932 INFO L93 Difference]: Finished difference Result 11138 states and 35112 transitions. [2022-03-01 18:41:31,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2022-03-01 18:41:31,932 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:41:31,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:41:31,952 INFO L225 Difference]: With dead ends: 11138 [2022-03-01 18:41:31,952 INFO L226 Difference]: Without dead ends: 11130 [2022-03-01 18:41:31,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9403 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=4289, Invalid=18361, Unknown=0, NotChecked=0, Total=22650 [2022-03-01 18:41:31,954 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 622 mSDsluCounter, 917 mSDsCounter, 0 mSdLazyCounter, 1721 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 622 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 1846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 1721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:41:31,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [622 Valid, 606 Invalid, 1846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 1721 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-01 18:41:31,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11130 states. [2022-03-01 18:41:32,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11130 to 4567. [2022-03-01 18:41:32,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4567 states, 4566 states have (on average 3.6151992991677617) internal successors, (16507), 4566 states have internal predecessors, (16507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:41:32,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4567 states to 4567 states and 16507 transitions. [2022-03-01 18:41:32,078 INFO L78 Accepts]: Start accepts. Automaton has 4567 states and 16507 transitions. Word has length 30 [2022-03-01 18:41:32,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:41:32,079 INFO L470 AbstractCegarLoop]: Abstraction has 4567 states and 16507 transitions. [2022-03-01 18:41:32,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:41:32,079 INFO L276 IsEmpty]: Start isEmpty. Operand 4567 states and 16507 transitions. [2022-03-01 18:41:32,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:41:32,085 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:41:32,085 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:41:32,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-01 18:41:32,301 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 [2022-03-01 18:41:32,302 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:41:32,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:41:32,302 INFO L85 PathProgramCache]: Analyzing trace with hash -713124495, now seen corresponding path program 28 times [2022-03-01 18:41:32,302 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:41:32,302 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780356728] [2022-03-01 18:41:32,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:41:32,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:41:32,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:41:32,345 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:41:32,345 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:41:32,345 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780356728] [2022-03-01 18:41:32,345 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780356728] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:41:32,345 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391019297] [2022-03-01 18:41:32,346 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:41:32,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:41:32,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:41:32,347 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) [2022-03-01 18:41:32,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-01 18:41:32,385 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:41:32,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:41:32,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:41:32,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:41:32,519 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:41:32,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:41:32,632 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:41:32,632 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391019297] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:41:32,632 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:41:32,632 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 21 [2022-03-01 18:41:32,632 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343509186] [2022-03-01 18:41:32,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:41:32,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:41:32,633 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:41:32,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:41:32,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:41:32,634 INFO L87 Difference]: Start difference. First operand 4567 states and 16507 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:41:34,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:41:34,375 INFO L93 Difference]: Finished difference Result 12349 states and 38953 transitions. [2022-03-01 18:41:34,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2022-03-01 18:41:34,375 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:41:34,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:41:34,398 INFO L225 Difference]: With dead ends: 12349 [2022-03-01 18:41:34,398 INFO L226 Difference]: Without dead ends: 12349 [2022-03-01 18:41:34,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8011 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=4044, Invalid=15138, Unknown=0, NotChecked=0, Total=19182 [2022-03-01 18:41:34,401 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 768 mSDsluCounter, 806 mSDsCounter, 0 mSdLazyCounter, 1490 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 768 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 1594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:41:34,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [768 Valid, 519 Invalid, 1594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1490 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 18:41:34,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12349 states. [2022-03-01 18:41:34,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12349 to 4699. [2022-03-01 18:41:34,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4699 states, 4698 states have (on average 3.62281822051937) internal successors, (17020), 4698 states have internal predecessors, (17020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:41:34,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4699 states to 4699 states and 17020 transitions. [2022-03-01 18:41:34,578 INFO L78 Accepts]: Start accepts. Automaton has 4699 states and 17020 transitions. Word has length 30 [2022-03-01 18:41:34,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:41:34,578 INFO L470 AbstractCegarLoop]: Abstraction has 4699 states and 17020 transitions. [2022-03-01 18:41:34,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:41:34,578 INFO L276 IsEmpty]: Start isEmpty. Operand 4699 states and 17020 transitions. [2022-03-01 18:41:34,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:41:34,585 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:41:34,586 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:41:34,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-03-01 18:41:34,786 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 [2022-03-01 18:41:34,786 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:41:34,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:41:34,786 INFO L85 PathProgramCache]: Analyzing trace with hash 412476405, now seen corresponding path program 29 times [2022-03-01 18:41:34,786 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:41:34,786 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454661540] [2022-03-01 18:41:34,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:41:34,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:41:34,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:41:34,830 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:41:34,831 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:41:34,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454661540] [2022-03-01 18:41:34,831 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454661540] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:41:34,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346619719] [2022-03-01 18:41:34,831 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:41:34,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:41:34,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:41:34,836 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) [2022-03-01 18:41:34,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-01 18:41:34,876 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-01 18:41:34,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:41:34,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:41:34,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:41:35,001 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:41:35,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:41:35,088 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:41:35,088 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346619719] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:41:35,088 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:41:35,088 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 21 [2022-03-01 18:41:35,088 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114932342] [2022-03-01 18:41:35,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:41:35,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:41:35,088 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:41:35,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:41:35,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:41:35,089 INFO L87 Difference]: Start difference. First operand 4699 states and 17020 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:41:37,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:41:37,081 INFO L93 Difference]: Finished difference Result 12269 states and 38987 transitions. [2022-03-01 18:41:37,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2022-03-01 18:41:37,082 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:41:37,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:41:37,109 INFO L225 Difference]: With dead ends: 12269 [2022-03-01 18:41:37,109 INFO L226 Difference]: Without dead ends: 12257 [2022-03-01 18:41:37,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10010 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=4896, Invalid=19284, Unknown=0, NotChecked=0, Total=24180 [2022-03-01 18:41:37,112 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 713 mSDsluCounter, 819 mSDsCounter, 0 mSdLazyCounter, 1847 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 713 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 1982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 1847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:41:37,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [713 Valid, 516 Invalid, 1982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 1847 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 18:41:37,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12257 states. [2022-03-01 18:41:37,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12257 to 4581. [2022-03-01 18:41:37,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4581 states, 4580 states have (on average 3.622052401746725) internal successors, (16589), 4580 states have internal predecessors, (16589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:41:37,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4581 states to 4581 states and 16589 transitions. [2022-03-01 18:41:37,280 INFO L78 Accepts]: Start accepts. Automaton has 4581 states and 16589 transitions. Word has length 30 [2022-03-01 18:41:37,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:41:37,280 INFO L470 AbstractCegarLoop]: Abstraction has 4581 states and 16589 transitions. [2022-03-01 18:41:37,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:41:37,280 INFO L276 IsEmpty]: Start isEmpty. Operand 4581 states and 16589 transitions. [2022-03-01 18:41:37,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:41:37,288 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:41:37,288 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:41:37,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-03-01 18:41:37,505 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 [2022-03-01 18:41:37,505 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:41:37,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:41:37,506 INFO L85 PathProgramCache]: Analyzing trace with hash -917258635, now seen corresponding path program 30 times [2022-03-01 18:41:37,506 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:41:37,506 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601569860] [2022-03-01 18:41:37,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:41:37,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:41:37,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:41:37,558 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:41:37,558 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:41:37,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601569860] [2022-03-01 18:41:37,558 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601569860] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:41:37,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667177095] [2022-03-01 18:41:37,558 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:41:37,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:41:37,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:41:37,559 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) [2022-03-01 18:41:37,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-01 18:41:37,605 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 18:41:37,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:41:37,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:41:37,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:41:37,745 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:41:37,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:41:37,827 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:41:37,827 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667177095] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:41:37,827 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:41:37,827 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 21 [2022-03-01 18:41:37,828 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304118223] [2022-03-01 18:41:37,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:41:37,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:41:37,828 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:41:37,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:41:37,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:41:37,828 INFO L87 Difference]: Start difference. First operand 4581 states and 16589 transitions. Second operand has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:41:39,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:41:39,637 INFO L93 Difference]: Finished difference Result 13308 states and 42483 transitions. [2022-03-01 18:41:39,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2022-03-01 18:41:39,639 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:41:39,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:41:39,671 INFO L225 Difference]: With dead ends: 13308 [2022-03-01 18:41:39,671 INFO L226 Difference]: Without dead ends: 13308 [2022-03-01 18:41:39,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10097 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=4756, Invalid=18500, Unknown=0, NotChecked=0, Total=23256 [2022-03-01 18:41:39,674 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 927 mSDsluCounter, 857 mSDsCounter, 0 mSdLazyCounter, 1480 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 927 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 1607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:41:39,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [927 Valid, 513 Invalid, 1607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1480 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 18:41:39,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13308 states. [2022-03-01 18:41:39,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13308 to 4586. [2022-03-01 18:41:39,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4586 states, 4585 states have (on average 3.6272628135223557) internal successors, (16631), 4585 states have internal predecessors, (16631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:41:39,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4586 states to 4586 states and 16631 transitions. [2022-03-01 18:41:39,875 INFO L78 Accepts]: Start accepts. Automaton has 4586 states and 16631 transitions. Word has length 30 [2022-03-01 18:41:39,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:41:39,876 INFO L470 AbstractCegarLoop]: Abstraction has 4586 states and 16631 transitions. [2022-03-01 18:41:39,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:41:39,876 INFO L276 IsEmpty]: Start isEmpty. Operand 4586 states and 16631 transitions. [2022-03-01 18:41:39,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:41:39,898 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:41:39,898 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:41:39,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-03-01 18:41:40,098 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 [2022-03-01 18:41:40,099 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:41:40,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:41:40,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1035516469, now seen corresponding path program 31 times [2022-03-01 18:41:40,099 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:41:40,099 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874247927] [2022-03-01 18:41:40,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:41:40,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:41:40,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:41:40,145 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:41:40,145 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:41:40,145 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874247927] [2022-03-01 18:41:40,145 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874247927] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:41:40,145 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113631523] [2022-03-01 18:41:40,145 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:41:40,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:41:40,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:41:40,160 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) [2022-03-01 18:41:40,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-01 18:41:40,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:41:40,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:41:40,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:41:40,335 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:41:40,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:41:40,457 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:41:40,457 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113631523] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:41:40,457 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:41:40,457 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 21 [2022-03-01 18:41:40,457 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225082438] [2022-03-01 18:41:40,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:41:40,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:41:40,457 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:41:40,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:41:40,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:41:40,458 INFO L87 Difference]: Start difference. First operand 4586 states and 16631 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:41:43,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:41:43,228 INFO L93 Difference]: Finished difference Result 14837 states and 46985 transitions. [2022-03-01 18:41:43,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2022-03-01 18:41:43,229 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:41:43,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:41:43,261 INFO L225 Difference]: With dead ends: 14837 [2022-03-01 18:41:43,261 INFO L226 Difference]: Without dead ends: 14837 [2022-03-01 18:41:43,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14666 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=6595, Invalid=26347, Unknown=0, NotChecked=0, Total=32942 [2022-03-01 18:41:43,263 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 856 mSDsluCounter, 834 mSDsCounter, 0 mSdLazyCounter, 1588 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 856 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 1711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:41:43,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [856 Valid, 509 Invalid, 1711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1588 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-01 18:41:43,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14837 states. [2022-03-01 18:41:43,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14837 to 4565. [2022-03-01 18:41:43,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4565 states, 4564 states have (on average 3.618755477651183) internal successors, (16516), 4564 states have internal predecessors, (16516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:41:43,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4565 states to 4565 states and 16516 transitions. [2022-03-01 18:41:43,434 INFO L78 Accepts]: Start accepts. Automaton has 4565 states and 16516 transitions. Word has length 30 [2022-03-01 18:41:43,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:41:43,435 INFO L470 AbstractCegarLoop]: Abstraction has 4565 states and 16516 transitions. [2022-03-01 18:41:43,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:41:43,435 INFO L276 IsEmpty]: Start isEmpty. Operand 4565 states and 16516 transitions. [2022-03-01 18:41:43,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:41:43,443 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:41:43,443 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:41:43,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-03-01 18:41:43,659 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 [2022-03-01 18:41:43,660 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:41:43,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:41:43,660 INFO L85 PathProgramCache]: Analyzing trace with hash -863850567, now seen corresponding path program 32 times [2022-03-01 18:41:43,660 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:41:43,660 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280459623] [2022-03-01 18:41:43,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:41:43,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:41:43,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:41:43,714 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:41:43,714 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:41:43,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280459623] [2022-03-01 18:41:43,714 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280459623] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:41:43,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259917841] [2022-03-01 18:41:43,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:41:43,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:41:43,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:41:43,720 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) [2022-03-01 18:41:43,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-01 18:41:43,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:41:43,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:41:43,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:41:43,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:41:43,874 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:41:43,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:41:43,988 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:41:43,988 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259917841] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:41:43,988 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:41:43,988 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 19 [2022-03-01 18:41:43,988 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479878593] [2022-03-01 18:41:43,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:41:43,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 18:41:43,988 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:41:43,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 18:41:43,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2022-03-01 18:41:43,989 INFO L87 Difference]: Start difference. First operand 4565 states and 16516 transitions. Second operand has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 19 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) [2022-03-01 18:41:45,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:41:45,428 INFO L93 Difference]: Finished difference Result 12793 states and 40356 transitions. [2022-03-01 18:41:45,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-03-01 18:41:45,429 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 19 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 30 [2022-03-01 18:41:45,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:41:45,461 INFO L225 Difference]: With dead ends: 12793 [2022-03-01 18:41:45,461 INFO L226 Difference]: Without dead ends: 12785 [2022-03-01 18:41:45,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4715 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2810, Invalid=9180, Unknown=0, NotChecked=0, Total=11990 [2022-03-01 18:41:45,462 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 690 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 1142 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 690 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 1267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 1142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:41:45,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [690 Valid, 375 Invalid, 1267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 1142 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 18:41:45,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12785 states. [2022-03-01 18:41:45,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12785 to 4571. [2022-03-01 18:41:45,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4571 states, 4570 states have (on average 3.6185995623632383) internal successors, (16537), 4570 states have internal predecessors, (16537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:41:45,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4571 states to 4571 states and 16537 transitions. [2022-03-01 18:41:45,654 INFO L78 Accepts]: Start accepts. Automaton has 4571 states and 16537 transitions. Word has length 30 [2022-03-01 18:41:45,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:41:45,654 INFO L470 AbstractCegarLoop]: Abstraction has 4571 states and 16537 transitions. [2022-03-01 18:41:45,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 19 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) [2022-03-01 18:41:45,655 INFO L276 IsEmpty]: Start isEmpty. Operand 4571 states and 16537 transitions. [2022-03-01 18:41:45,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:41:45,662 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:41:45,662 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:41:45,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-03-01 18:41:45,878 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 [2022-03-01 18:41:45,879 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:41:45,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:41:45,879 INFO L85 PathProgramCache]: Analyzing trace with hash -593340875, now seen corresponding path program 33 times [2022-03-01 18:41:45,879 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:41:45,879 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772998303] [2022-03-01 18:41:45,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:41:45,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:41:45,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:41:45,924 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:41:45,924 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:41:45,924 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772998303] [2022-03-01 18:41:45,924 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772998303] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:41:45,924 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588512825] [2022-03-01 18:41:45,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:41:45,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:41:45,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:41:45,940 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) [2022-03-01 18:41:45,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-01 18:41:45,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-01 18:41:45,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:41:45,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:41:45,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:41:46,115 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:41:46,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:41:46,206 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:41:46,206 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588512825] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:41:46,206 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:41:46,207 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 19 [2022-03-01 18:41:46,207 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110957755] [2022-03-01 18:41:46,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:41:46,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 18:41:46,207 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:41:46,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 18:41:46,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2022-03-01 18:41:46,208 INFO L87 Difference]: Start difference. First operand 4571 states and 16537 transitions. Second operand has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 19 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) [2022-03-01 18:41:47,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:41:47,752 INFO L93 Difference]: Finished difference Result 13274 states and 41550 transitions. [2022-03-01 18:41:47,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-03-01 18:41:47,752 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 19 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 30 [2022-03-01 18:41:47,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:41:47,778 INFO L225 Difference]: With dead ends: 13274 [2022-03-01 18:41:47,778 INFO L226 Difference]: Without dead ends: 13274 [2022-03-01 18:41:47,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5819 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=3140, Invalid=10666, Unknown=0, NotChecked=0, Total=13806 [2022-03-01 18:41:47,780 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 683 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 1433 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 683 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 1555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:41:47,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [683 Valid, 552 Invalid, 1555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1433 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 18:41:47,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13274 states. [2022-03-01 18:41:47,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13274 to 4399. [2022-03-01 18:41:47,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4399 states, 4398 states have (on average 3.575943610732151) internal successors, (15727), 4398 states have internal predecessors, (15727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:41:47,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4399 states to 4399 states and 15727 transitions. [2022-03-01 18:41:47,935 INFO L78 Accepts]: Start accepts. Automaton has 4399 states and 15727 transitions. Word has length 30 [2022-03-01 18:41:47,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:41:47,935 INFO L470 AbstractCegarLoop]: Abstraction has 4399 states and 15727 transitions. [2022-03-01 18:41:47,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 19 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) [2022-03-01 18:41:47,935 INFO L276 IsEmpty]: Start isEmpty. Operand 4399 states and 15727 transitions. [2022-03-01 18:41:47,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:41:47,942 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:41:47,942 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:41:47,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-03-01 18:41:48,157 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 [2022-03-01 18:41:48,158 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:41:48,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:41:48,158 INFO L85 PathProgramCache]: Analyzing trace with hash -789534161, now seen corresponding path program 34 times [2022-03-01 18:41:48,158 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:41:48,158 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300764231] [2022-03-01 18:41:48,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:41:48,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:41:48,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:41:48,193 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 18:41:48,193 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:41:48,193 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300764231] [2022-03-01 18:41:48,193 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300764231] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:41:48,194 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684570498] [2022-03-01 18:41:48,194 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:41:48,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:41:48,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:41:48,195 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) [2022-03-01 18:41:48,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-01 18:41:48,235 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:41:48,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:41:48,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:41:48,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:41:48,326 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 18:41:48,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:41:48,407 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:41:48,407 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684570498] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:41:48,407 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:41:48,407 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 8] total 13 [2022-03-01 18:41:48,407 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829665167] [2022-03-01 18:41:48,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:41:48,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 18:41:48,408 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:41:48,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 18:41:48,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2022-03-01 18:41:48,408 INFO L87 Difference]: Start difference. First operand 4399 states and 15727 transitions. Second operand has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 13 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) [2022-03-01 18:41:48,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:41:48,619 INFO L93 Difference]: Finished difference Result 6449 states and 21322 transitions. [2022-03-01 18:41:48,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 18:41:48,619 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 13 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) Word has length 30 [2022-03-01 18:41:48,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:41:48,632 INFO L225 Difference]: With dead ends: 6449 [2022-03-01 18:41:48,632 INFO L226 Difference]: Without dead ends: 6449 [2022-03-01 18:41:48,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=273, Invalid=483, Unknown=0, NotChecked=0, Total=756 [2022-03-01 18:41:48,633 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 302 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:41:48,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 84 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:41:48,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6449 states. [2022-03-01 18:41:48,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6449 to 4316. [2022-03-01 18:41:48,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4316 states, 4315 states have (on average 3.5606025492468136) internal successors, (15364), 4315 states have internal predecessors, (15364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:41:48,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4316 states to 4316 states and 15364 transitions. [2022-03-01 18:41:48,718 INFO L78 Accepts]: Start accepts. Automaton has 4316 states and 15364 transitions. Word has length 30 [2022-03-01 18:41:48,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:41:48,719 INFO L470 AbstractCegarLoop]: Abstraction has 4316 states and 15364 transitions. [2022-03-01 18:41:48,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 13 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) [2022-03-01 18:41:48,719 INFO L276 IsEmpty]: Start isEmpty. Operand 4316 states and 15364 transitions. [2022-03-01 18:41:48,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:41:48,725 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:41:48,725 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:41:48,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-03-01 18:41:48,936 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 [2022-03-01 18:41:48,937 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:41:48,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:41:48,937 INFO L85 PathProgramCache]: Analyzing trace with hash -530738837, now seen corresponding path program 35 times [2022-03-01 18:41:48,937 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:41:48,937 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663042813] [2022-03-01 18:41:48,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:41:48,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:41:48,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:41:48,969 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:41:48,969 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:41:48,969 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663042813] [2022-03-01 18:41:48,969 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663042813] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:41:48,969 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127813733] [2022-03-01 18:41:48,969 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:41:48,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:41:48,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:41:48,975 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) [2022-03-01 18:41:48,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-01 18:41:49,024 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 18:41:49,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:41:49,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-01 18:41:49,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:41:49,080 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:41:49,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:41:49,138 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:41:49,139 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127813733] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:41:49,139 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:41:49,139 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 17 [2022-03-01 18:41:49,139 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002233468] [2022-03-01 18:41:49,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:41:49,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 18:41:49,139 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:41:49,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 18:41:49,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-03-01 18:41:49,140 INFO L87 Difference]: Start difference. First operand 4316 states and 15364 transitions. Second operand has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 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) [2022-03-01 18:41:50,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:41:50,735 INFO L93 Difference]: Finished difference Result 9281 states and 29662 transitions. [2022-03-01 18:41:50,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-03-01 18:41:50,736 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 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 30 [2022-03-01 18:41:50,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:41:50,753 INFO L225 Difference]: With dead ends: 9281 [2022-03-01 18:41:50,753 INFO L226 Difference]: Without dead ends: 9227 [2022-03-01 18:41:50,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4351 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2944, Invalid=8612, Unknown=0, NotChecked=0, Total=11556 [2022-03-01 18:41:50,754 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 551 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 1156 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 551 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 1299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:41:50,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [551 Valid, 353 Invalid, 1299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1156 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 18:41:50,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9227 states. [2022-03-01 18:41:50,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9227 to 4444. [2022-03-01 18:41:50,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4444 states, 4443 states have (on average 3.5941931127616473) internal successors, (15969), 4443 states have internal predecessors, (15969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:41:50,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4444 states to 4444 states and 15969 transitions. [2022-03-01 18:41:50,861 INFO L78 Accepts]: Start accepts. Automaton has 4444 states and 15969 transitions. Word has length 30 [2022-03-01 18:41:50,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:41:50,862 INFO L470 AbstractCegarLoop]: Abstraction has 4444 states and 15969 transitions. [2022-03-01 18:41:50,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 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) [2022-03-01 18:41:50,862 INFO L276 IsEmpty]: Start isEmpty. Operand 4444 states and 15969 transitions. [2022-03-01 18:41:50,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:41:50,869 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:41:50,869 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:41:50,885 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-03-01 18:41:51,085 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 [2022-03-01 18:41:51,085 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:41:51,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:41:51,085 INFO L85 PathProgramCache]: Analyzing trace with hash 379456291, now seen corresponding path program 36 times [2022-03-01 18:41:51,086 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:41:51,086 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19375502] [2022-03-01 18:41:51,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:41:51,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:41:51,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:41:51,154 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:41:51,155 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:41:51,155 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19375502] [2022-03-01 18:41:51,155 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19375502] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:41:51,155 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428118726] [2022-03-01 18:41:51,155 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:41:51,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:41:51,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:41:51,156 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) [2022-03-01 18:41:51,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-01 18:41:51,196 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 18:41:51,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:41:51,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-01 18:41:51,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:41:51,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-01 18:41:51,380 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-03-01 18:41:51,381 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-03-01 18:41:51,430 INFO L353 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2022-03-01 18:41:51,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2022-03-01 18:41:51,798 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:41:51,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:41:51,963 INFO L353 Elim1Store]: treesize reduction 15, result has 69.4 percent of original size [2022-03-01 18:41:51,964 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 22 treesize of output 48 [2022-03-01 18:41:52,329 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:41:52,329 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428118726] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:41:52,329 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:41:52,329 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 14] total 33 [2022-03-01 18:41:52,329 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471601566] [2022-03-01 18:41:52,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:41:52,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 18:41:52,330 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:41:52,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 18:41:52,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=907, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 18:41:52,330 INFO L87 Difference]: Start difference. First operand 4444 states and 15969 transitions. Second operand has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 33 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:42:01,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:42:01,334 INFO L93 Difference]: Finished difference Result 14335 states and 45796 transitions. [2022-03-01 18:42:01,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 243 states. [2022-03-01 18:42:01,335 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 33 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:42:01,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:42:01,369 INFO L225 Difference]: With dead ends: 14335 [2022-03-01 18:42:01,369 INFO L226 Difference]: Without dead ends: 13974 [2022-03-01 18:42:01,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 63 SyntacticMatches, 7 SemanticMatches, 258 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27978 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=7316, Invalid=60024, Unknown=0, NotChecked=0, Total=67340 [2022-03-01 18:42:01,371 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 1151 mSDsluCounter, 2735 mSDsCounter, 0 mSdLazyCounter, 3142 mSolverCounterSat, 329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1151 SdHoareTripleChecker+Valid, 1573 SdHoareTripleChecker+Invalid, 5235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 329 IncrementalHoareTripleChecker+Valid, 3142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1764 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:42:01,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1151 Valid, 1573 Invalid, 5235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [329 Valid, 3142 Invalid, 0 Unknown, 1764 Unchecked, 1.4s Time] [2022-03-01 18:42:01,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13974 states. [2022-03-01 18:42:01,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13974 to 5310. [2022-03-01 18:42:01,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5310 states, 5309 states have (on average 3.643435675268412) internal successors, (19343), 5309 states have internal predecessors, (19343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:42:01,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5310 states to 5310 states and 19343 transitions. [2022-03-01 18:42:01,549 INFO L78 Accepts]: Start accepts. Automaton has 5310 states and 19343 transitions. Word has length 30 [2022-03-01 18:42:01,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:42:01,549 INFO L470 AbstractCegarLoop]: Abstraction has 5310 states and 19343 transitions. [2022-03-01 18:42:01,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 33 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:42:01,549 INFO L276 IsEmpty]: Start isEmpty. Operand 5310 states and 19343 transitions. [2022-03-01 18:42:01,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:42:01,558 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:42:01,558 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:42:01,574 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-03-01 18:42:01,774 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 [2022-03-01 18:42:01,774 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:42:01,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:42:01,775 INFO L85 PathProgramCache]: Analyzing trace with hash 733452651, now seen corresponding path program 37 times [2022-03-01 18:42:01,775 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:42:01,775 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189362947] [2022-03-01 18:42:01,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:42:01,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:42:01,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:42:01,808 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:42:01,808 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:42:01,808 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189362947] [2022-03-01 18:42:01,808 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189362947] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:42:01,808 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809631794] [2022-03-01 18:42:01,808 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:42:01,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:42:01,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:42:01,812 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) [2022-03-01 18:42:01,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-01 18:42:01,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:42:01,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:42:01,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:42:01,954 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:42:01,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:42:02,026 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:42:02,027 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809631794] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:42:02,027 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:42:02,027 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-03-01 18:42:02,027 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193506219] [2022-03-01 18:42:02,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:42:02,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 18:42:02,028 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:42:02,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 18:42:02,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2022-03-01 18:42:02,028 INFO L87 Difference]: Start difference. First operand 5310 states and 19343 transitions. Second operand has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 14 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) [2022-03-01 18:42:02,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:42:02,303 INFO L93 Difference]: Finished difference Result 7739 states and 26954 transitions. [2022-03-01 18:42:02,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 18:42:02,303 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 14 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 30 [2022-03-01 18:42:02,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:42:02,320 INFO L225 Difference]: With dead ends: 7739 [2022-03-01 18:42:02,321 INFO L226 Difference]: Without dead ends: 7413 [2022-03-01 18:42:02,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=342, Unknown=0, NotChecked=0, Total=552 [2022-03-01 18:42:02,322 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 266 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:42:02,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 64 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:42:02,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7413 states. [2022-03-01 18:42:02,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7413 to 5670. [2022-03-01 18:42:02,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5670 states, 5669 states have (on average 3.7110601517022404) internal successors, (21038), 5669 states have internal predecessors, (21038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:42:02,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5670 states to 5670 states and 21038 transitions. [2022-03-01 18:42:02,453 INFO L78 Accepts]: Start accepts. Automaton has 5670 states and 21038 transitions. Word has length 30 [2022-03-01 18:42:02,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:42:02,453 INFO L470 AbstractCegarLoop]: Abstraction has 5670 states and 21038 transitions. [2022-03-01 18:42:02,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 14 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) [2022-03-01 18:42:02,454 INFO L276 IsEmpty]: Start isEmpty. Operand 5670 states and 21038 transitions. [2022-03-01 18:42:02,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:42:02,463 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:42:02,463 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:42:02,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-03-01 18:42:02,673 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 [2022-03-01 18:42:02,673 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:42:02,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:42:02,673 INFO L85 PathProgramCache]: Analyzing trace with hash -556252441, now seen corresponding path program 38 times [2022-03-01 18:42:02,674 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:42:02,674 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013284332] [2022-03-01 18:42:02,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:42:02,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:42:02,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:42:02,718 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:42:02,718 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:42:02,718 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013284332] [2022-03-01 18:42:02,718 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013284332] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:42:02,718 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939625038] [2022-03-01 18:42:02,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:42:02,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:42:02,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:42:02,719 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) [2022-03-01 18:42:02,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-01 18:42:02,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:42:02,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:42:02,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-01 18:42:02,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:42:02,940 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:42:02,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:42:03,071 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 18:42:03,072 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939625038] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:42:03,072 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:42:03,072 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 17 [2022-03-01 18:42:03,072 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274337491] [2022-03-01 18:42:03,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:42:03,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 18:42:03,072 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:42:03,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 18:42:03,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-03-01 18:42:03,072 INFO L87 Difference]: Start difference. First operand 5670 states and 21038 transitions. Second operand has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 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) [2022-03-01 18:42:04,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:42:04,140 INFO L93 Difference]: Finished difference Result 9916 states and 33870 transitions. [2022-03-01 18:42:04,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-01 18:42:04,140 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 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 30 [2022-03-01 18:42:04,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:42:04,162 INFO L225 Difference]: With dead ends: 9916 [2022-03-01 18:42:04,162 INFO L226 Difference]: Without dead ends: 9842 [2022-03-01 18:42:04,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1599 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1212, Invalid=3210, Unknown=0, NotChecked=0, Total=4422 [2022-03-01 18:42:04,178 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 356 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 967 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 1056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:42:04,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 261 Invalid, 1056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 967 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 18:42:04,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9842 states. [2022-03-01 18:42:04,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9842 to 6192. [2022-03-01 18:42:04,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6192 states, 6191 states have (on average 3.7491519948312066) internal successors, (23211), 6191 states have internal predecessors, (23211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:42:04,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6192 states to 6192 states and 23211 transitions. [2022-03-01 18:42:04,322 INFO L78 Accepts]: Start accepts. Automaton has 6192 states and 23211 transitions. Word has length 30 [2022-03-01 18:42:04,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:42:04,322 INFO L470 AbstractCegarLoop]: Abstraction has 6192 states and 23211 transitions. [2022-03-01 18:42:04,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 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) [2022-03-01 18:42:04,322 INFO L276 IsEmpty]: Start isEmpty. Operand 6192 states and 23211 transitions. [2022-03-01 18:42:04,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:42:04,333 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:42:04,333 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:42:04,349 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-03-01 18:42:04,548 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 [2022-03-01 18:42:04,549 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:42:04,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:42:04,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1934026897, now seen corresponding path program 39 times [2022-03-01 18:42:04,549 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:42:04,549 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137896874] [2022-03-01 18:42:04,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:42:04,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:42:04,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:42:04,589 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:42:04,590 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:42:04,590 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137896874] [2022-03-01 18:42:04,590 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137896874] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:42:04,590 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850162532] [2022-03-01 18:42:04,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:42:04,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:42:04,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:42:04,600 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) [2022-03-01 18:42:04,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-01 18:42:04,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:42:04,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:42:04,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-01 18:42:04,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:42:04,778 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-01 18:42:04,876 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-03-01 18:42:04,876 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-03-01 18:42:05,012 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 18:42:05,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:42:05,085 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-03-01 18:42:05,085 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 26 [2022-03-01 18:42:05,257 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 18:42:05,257 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850162532] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:42:05,257 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:42:05,257 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-03-01 18:42:05,257 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117973207] [2022-03-01 18:42:05,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:42:05,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 18:42:05,257 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:42:05,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 18:42:05,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-03-01 18:42:05,258 INFO L87 Difference]: Start difference. First operand 6192 states and 23211 transitions. Second operand has 23 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 23 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) [2022-03-01 18:42:06,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:42:06,488 INFO L93 Difference]: Finished difference Result 14134 states and 49084 transitions. [2022-03-01 18:42:06,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-01 18:42:06,488 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 23 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 30 [2022-03-01 18:42:06,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:42:06,573 INFO L225 Difference]: With dead ends: 14134 [2022-03-01 18:42:06,573 INFO L226 Difference]: Without dead ends: 13763 [2022-03-01 18:42:06,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1728 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=924, Invalid=5082, Unknown=0, NotChecked=0, Total=6006 [2022-03-01 18:42:06,575 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 353 mSDsluCounter, 1229 mSDsCounter, 0 mSdLazyCounter, 1225 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 801 SdHoareTripleChecker+Invalid, 2282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 981 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:42:06,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 801 Invalid, 2282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1225 Invalid, 0 Unknown, 981 Unchecked, 0.4s Time] [2022-03-01 18:42:06,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13763 states. [2022-03-01 18:42:06,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13763 to 8244. [2022-03-01 18:42:06,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8244 states, 8243 states have (on average 3.843018318573335) internal successors, (31678), 8243 states have internal predecessors, (31678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:42:06,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8244 states to 8244 states and 31678 transitions. [2022-03-01 18:42:06,781 INFO L78 Accepts]: Start accepts. Automaton has 8244 states and 31678 transitions. Word has length 30 [2022-03-01 18:42:06,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:42:06,781 INFO L470 AbstractCegarLoop]: Abstraction has 8244 states and 31678 transitions. [2022-03-01 18:42:06,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 23 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) [2022-03-01 18:42:06,781 INFO L276 IsEmpty]: Start isEmpty. Operand 8244 states and 31678 transitions. [2022-03-01 18:42:06,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:42:06,795 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:42:06,795 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:42:06,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-03-01 18:42:07,008 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 [2022-03-01 18:42:07,008 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:42:07,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:42:07,009 INFO L85 PathProgramCache]: Analyzing trace with hash 109854575, now seen corresponding path program 40 times [2022-03-01 18:42:07,009 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:42:07,009 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118112471] [2022-03-01 18:42:07,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:42:07,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:42:07,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:42:07,063 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:42:07,063 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:42:07,063 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118112471] [2022-03-01 18:42:07,063 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118112471] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:42:07,063 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299183138] [2022-03-01 18:42:07,063 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:42:07,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:42:07,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:42:07,064 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) [2022-03-01 18:42:07,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-01 18:42:07,107 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:42:07,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:42:07,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:42:07,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:42:07,197 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:42:07,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:42:07,289 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:42:07,289 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299183138] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:42:07,289 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:42:07,290 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 16 [2022-03-01 18:42:07,290 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348538052] [2022-03-01 18:42:07,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:42:07,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 18:42:07,290 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:42:07,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 18:42:07,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-03-01 18:42:07,290 INFO L87 Difference]: Start difference. First operand 8244 states and 31678 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 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) [2022-03-01 18:42:08,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:42:08,357 INFO L93 Difference]: Finished difference Result 15792 states and 55324 transitions. [2022-03-01 18:42:08,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-01 18:42:08,357 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 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 30 [2022-03-01 18:42:08,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:42:08,400 INFO L225 Difference]: With dead ends: 15792 [2022-03-01 18:42:08,400 INFO L226 Difference]: Without dead ends: 15792 [2022-03-01 18:42:08,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2049 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1285, Invalid=4117, Unknown=0, NotChecked=0, Total=5402 [2022-03-01 18:42:08,401 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 448 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 922 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:42:08,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [448 Valid, 391 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 922 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 18:42:08,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15792 states. [2022-03-01 18:42:08,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15792 to 8160. [2022-03-01 18:42:08,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8160 states, 8159 states have (on average 3.8534134085059444) internal successors, (31440), 8159 states have internal predecessors, (31440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:42:08,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8160 states to 8160 states and 31440 transitions. [2022-03-01 18:42:08,706 INFO L78 Accepts]: Start accepts. Automaton has 8160 states and 31440 transitions. Word has length 30 [2022-03-01 18:42:08,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:42:08,706 INFO L470 AbstractCegarLoop]: Abstraction has 8160 states and 31440 transitions. [2022-03-01 18:42:08,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 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) [2022-03-01 18:42:08,706 INFO L276 IsEmpty]: Start isEmpty. Operand 8160 states and 31440 transitions. [2022-03-01 18:42:08,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:42:08,721 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:42:08,722 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:42:08,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-03-01 18:42:08,938 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 [2022-03-01 18:42:08,939 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:42:08,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:42:08,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1583886883, now seen corresponding path program 41 times [2022-03-01 18:42:08,939 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:42:08,939 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737432102] [2022-03-01 18:42:08,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:42:08,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:42:08,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:42:08,990 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:42:08,990 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:42:08,990 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737432102] [2022-03-01 18:42:08,990 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737432102] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:42:08,990 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228366140] [2022-03-01 18:42:08,990 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:42:08,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:42:08,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:42:08,991 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) [2022-03-01 18:42:09,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-01 18:42:09,048 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 18:42:09,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:42:09,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:42:09,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:42:09,179 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:42:09,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:42:09,316 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:42:09,316 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228366140] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:42:09,316 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:42:09,316 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-01 18:42:09,316 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812016575] [2022-03-01 18:42:09,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:42:09,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 18:42:09,316 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:42:09,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 18:42:09,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:42:09,317 INFO L87 Difference]: Start difference. First operand 8160 states and 31440 transitions. Second operand has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:42:11,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:42:11,527 INFO L93 Difference]: Finished difference Result 16864 states and 57485 transitions. [2022-03-01 18:42:11,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2022-03-01 18:42:11,527 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:42:11,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:42:11,624 INFO L225 Difference]: With dead ends: 16864 [2022-03-01 18:42:11,625 INFO L226 Difference]: Without dead ends: 16864 [2022-03-01 18:42:11,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9186 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3892, Invalid=18458, Unknown=0, NotChecked=0, Total=22350 [2022-03-01 18:42:11,626 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 582 mSDsluCounter, 1287 mSDsCounter, 0 mSdLazyCounter, 1872 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 582 SdHoareTripleChecker+Valid, 787 SdHoareTripleChecker+Invalid, 1969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:42:11,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [582 Valid, 787 Invalid, 1969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1872 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-01 18:42:11,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16864 states. [2022-03-01 18:42:11,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16864 to 8404. [2022-03-01 18:42:11,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8404 states, 8403 states have (on average 3.835534928001904) internal successors, (32230), 8403 states have internal predecessors, (32230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:42:11,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8404 states to 8404 states and 32230 transitions. [2022-03-01 18:42:11,889 INFO L78 Accepts]: Start accepts. Automaton has 8404 states and 32230 transitions. Word has length 30 [2022-03-01 18:42:11,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:42:11,889 INFO L470 AbstractCegarLoop]: Abstraction has 8404 states and 32230 transitions. [2022-03-01 18:42:11,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:42:11,890 INFO L276 IsEmpty]: Start isEmpty. Operand 8404 states and 32230 transitions. [2022-03-01 18:42:11,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:42:11,905 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:42:11,905 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:42:11,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-03-01 18:42:12,130 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 [2022-03-01 18:42:12,131 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:42:12,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:42:12,132 INFO L85 PathProgramCache]: Analyzing trace with hash 528509489, now seen corresponding path program 42 times [2022-03-01 18:42:12,132 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:42:12,132 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636384342] [2022-03-01 18:42:12,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:42:12,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:42:12,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:42:12,183 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:42:12,183 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:42:12,183 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636384342] [2022-03-01 18:42:12,183 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636384342] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:42:12,183 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464474319] [2022-03-01 18:42:12,183 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:42:12,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:42:12,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:42:12,197 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) [2022-03-01 18:42:12,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-01 18:42:12,242 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 18:42:12,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:42:12,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:42:12,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:42:12,360 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:42:12,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:42:12,475 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:42:12,475 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464474319] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:42:12,476 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:42:12,476 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-01 18:42:12,476 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136892213] [2022-03-01 18:42:12,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:42:12,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 18:42:12,476 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:42:12,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 18:42:12,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:42:12,477 INFO L87 Difference]: Start difference. First operand 8404 states and 32230 transitions. Second operand has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:42:13,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:42:13,979 INFO L93 Difference]: Finished difference Result 15651 states and 54475 transitions. [2022-03-01 18:42:13,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-03-01 18:42:13,979 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:42:13,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:42:14,016 INFO L225 Difference]: With dead ends: 15651 [2022-03-01 18:42:14,017 INFO L226 Difference]: Without dead ends: 15643 [2022-03-01 18:42:14,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5719 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2883, Invalid=11879, Unknown=0, NotChecked=0, Total=14762 [2022-03-01 18:42:14,017 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 603 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 1276 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 603 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 1395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 1276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:42:14,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [603 Valid, 479 Invalid, 1395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1276 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 18:42:14,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15643 states. [2022-03-01 18:42:14,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15643 to 8342. [2022-03-01 18:42:14,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8342 states, 8341 states have (on average 3.8394676897254527) internal successors, (32025), 8341 states have internal predecessors, (32025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:42:14,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8342 states to 8342 states and 32025 transitions. [2022-03-01 18:42:14,271 INFO L78 Accepts]: Start accepts. Automaton has 8342 states and 32025 transitions. Word has length 30 [2022-03-01 18:42:14,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:42:14,272 INFO L470 AbstractCegarLoop]: Abstraction has 8342 states and 32025 transitions. [2022-03-01 18:42:14,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:42:14,272 INFO L276 IsEmpty]: Start isEmpty. Operand 8342 states and 32025 transitions. [2022-03-01 18:42:14,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:42:14,287 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:42:14,287 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:42:14,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-03-01 18:42:14,499 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 [2022-03-01 18:42:14,500 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:42:14,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:42:14,500 INFO L85 PathProgramCache]: Analyzing trace with hash 2011644427, now seen corresponding path program 43 times [2022-03-01 18:42:14,500 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:42:14,500 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124782520] [2022-03-01 18:42:14,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:42:14,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:42:14,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:42:14,547 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:42:14,547 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:42:14,547 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124782520] [2022-03-01 18:42:14,547 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124782520] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:42:14,547 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735037886] [2022-03-01 18:42:14,547 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:42:14,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:42:14,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:42:14,562 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) [2022-03-01 18:42:14,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-01 18:42:14,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:42:14,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:42:14,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:42:14,723 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:42:14,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:42:14,833 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:42:14,833 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735037886] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:42:14,833 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:42:14,833 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 20 [2022-03-01 18:42:14,834 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765796131] [2022-03-01 18:42:14,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:42:14,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 18:42:14,834 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:42:14,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 18:42:14,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:42:14,834 INFO L87 Difference]: Start difference. First operand 8342 states and 32025 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:42:16,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:42:16,402 INFO L93 Difference]: Finished difference Result 15609 states and 54374 transitions. [2022-03-01 18:42:16,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-03-01 18:42:16,402 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:42:16,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:42:16,442 INFO L225 Difference]: With dead ends: 15609 [2022-03-01 18:42:16,442 INFO L226 Difference]: Without dead ends: 15585 [2022-03-01 18:42:16,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5313 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2694, Invalid=11112, Unknown=0, NotChecked=0, Total=13806 [2022-03-01 18:42:16,443 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 526 mSDsluCounter, 824 mSDsCounter, 0 mSdLazyCounter, 1446 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 1560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:42:16,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [526 Valid, 555 Invalid, 1560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1446 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 18:42:16,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15585 states. [2022-03-01 18:42:16,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15585 to 8434. [2022-03-01 18:42:16,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8434 states, 8433 states have (on average 3.831495316020396) internal successors, (32311), 8433 states have internal predecessors, (32311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:42:16,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8434 states to 8434 states and 32311 transitions. [2022-03-01 18:42:16,691 INFO L78 Accepts]: Start accepts. Automaton has 8434 states and 32311 transitions. Word has length 30 [2022-03-01 18:42:16,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:42:16,692 INFO L470 AbstractCegarLoop]: Abstraction has 8434 states and 32311 transitions. [2022-03-01 18:42:16,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:42:16,692 INFO L276 IsEmpty]: Start isEmpty. Operand 8434 states and 32311 transitions. [2022-03-01 18:42:16,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:42:16,706 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:42:16,706 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:42:16,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-03-01 18:42:16,922 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 [2022-03-01 18:42:16,922 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:42:16,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:42:16,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1914992093, now seen corresponding path program 44 times [2022-03-01 18:42:16,923 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:42:16,923 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730511169] [2022-03-01 18:42:16,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:42:16,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:42:16,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:42:17,000 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:42:17,000 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:42:17,000 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730511169] [2022-03-01 18:42:17,001 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730511169] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:42:17,001 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121748740] [2022-03-01 18:42:17,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:42:17,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:42:17,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:42:17,002 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) [2022-03-01 18:42:17,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-01 18:42:17,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:42:17,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:42:17,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:42:17,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:42:17,181 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:42:17,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:42:17,311 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:42:17,311 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121748740] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:42:17,311 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:42:17,311 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2022-03-01 18:42:17,311 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095282690] [2022-03-01 18:42:17,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:42:17,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 18:42:17,311 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:42:17,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 18:42:17,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2022-03-01 18:42:17,312 INFO L87 Difference]: Start difference. First operand 8434 states and 32311 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:42:19,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:42:19,713 INFO L93 Difference]: Finished difference Result 20916 states and 72438 transitions. [2022-03-01 18:42:19,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2022-03-01 18:42:19,718 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:42:19,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:42:19,772 INFO L225 Difference]: With dead ends: 20916 [2022-03-01 18:42:19,773 INFO L226 Difference]: Without dead ends: 20916 [2022-03-01 18:42:19,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9937 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4752, Invalid=19428, Unknown=0, NotChecked=0, Total=24180 [2022-03-01 18:42:19,775 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 766 mSDsluCounter, 1039 mSDsCounter, 0 mSdLazyCounter, 1688 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 766 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 1821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:42:19,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [766 Valid, 615 Invalid, 1821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1688 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-01 18:42:19,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20916 states. [2022-03-01 18:42:20,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20916 to 10611. [2022-03-01 18:42:20,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10611 states, 10610 states have (on average 3.853722902921772) internal successors, (40888), 10610 states have internal predecessors, (40888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:42:20,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10611 states to 10611 states and 40888 transitions. [2022-03-01 18:42:20,209 INFO L78 Accepts]: Start accepts. Automaton has 10611 states and 40888 transitions. Word has length 30 [2022-03-01 18:42:20,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:42:20,209 INFO L470 AbstractCegarLoop]: Abstraction has 10611 states and 40888 transitions. [2022-03-01 18:42:20,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:42:20,209 INFO L276 IsEmpty]: Start isEmpty. Operand 10611 states and 40888 transitions. [2022-03-01 18:42:20,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:42:20,228 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:42:20,228 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:42:20,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-03-01 18:42:20,431 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 [2022-03-01 18:42:20,431 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:42:20,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:42:20,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1324597809, now seen corresponding path program 45 times [2022-03-01 18:42:20,432 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:42:20,432 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116038468] [2022-03-01 18:42:20,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:42:20,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:42:20,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:42:20,483 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:42:20,483 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:42:20,483 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116038468] [2022-03-01 18:42:20,483 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116038468] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:42:20,483 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047835095] [2022-03-01 18:42:20,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:42:20,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:42:20,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:42:20,494 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) [2022-03-01 18:42:20,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-01 18:42:20,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 18:42:20,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:42:20,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:42:20,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:42:20,659 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:42:20,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:42:20,794 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:42:20,794 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047835095] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:42:20,794 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:42:20,794 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2022-03-01 18:42:20,794 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976504402] [2022-03-01 18:42:20,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:42:20,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 18:42:20,794 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:42:20,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 18:42:20,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2022-03-01 18:42:20,795 INFO L87 Difference]: Start difference. First operand 10611 states and 40888 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:42:23,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:42:23,107 INFO L93 Difference]: Finished difference Result 21405 states and 74782 transitions. [2022-03-01 18:42:23,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2022-03-01 18:42:23,107 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:42:23,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:42:23,255 INFO L225 Difference]: With dead ends: 21405 [2022-03-01 18:42:23,256 INFO L226 Difference]: Without dead ends: 21381 [2022-03-01 18:42:23,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12520 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=5919, Invalid=24881, Unknown=0, NotChecked=0, Total=30800 [2022-03-01 18:42:23,257 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1022 mSDsluCounter, 691 mSDsCounter, 0 mSdLazyCounter, 1302 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1022 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 1511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 1302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:42:23,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1022 Valid, 454 Invalid, 1511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 1302 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 18:42:23,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21381 states. [2022-03-01 18:42:23,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21381 to 10491. [2022-03-01 18:42:23,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10491 states, 10490 states have (on average 3.85815061963775) internal successors, (40472), 10490 states have internal predecessors, (40472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:42:23,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10491 states to 10491 states and 40472 transitions. [2022-03-01 18:42:23,638 INFO L78 Accepts]: Start accepts. Automaton has 10491 states and 40472 transitions. Word has length 30 [2022-03-01 18:42:23,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:42:23,638 INFO L470 AbstractCegarLoop]: Abstraction has 10491 states and 40472 transitions. [2022-03-01 18:42:23,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:42:23,638 INFO L276 IsEmpty]: Start isEmpty. Operand 10491 states and 40472 transitions. [2022-03-01 18:42:23,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:42:23,660 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:42:23,660 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:42:23,681 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-03-01 18:42:23,861 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 [2022-03-01 18:42:23,861 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:42:23,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:42:23,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1487234549, now seen corresponding path program 46 times [2022-03-01 18:42:23,862 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:42:23,862 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474717190] [2022-03-01 18:42:23,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:42:23,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:42:23,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:42:23,899 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:42:23,900 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:42:23,900 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474717190] [2022-03-01 18:42:23,900 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474717190] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:42:23,900 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481723392] [2022-03-01 18:42:23,900 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:42:23,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:42:23,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:42:23,901 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) [2022-03-01 18:42:23,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-01 18:42:23,954 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:42:23,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:42:23,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:42:23,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:42:24,066 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:42:24,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:42:24,216 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:42:24,216 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481723392] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:42:24,216 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:42:24,216 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 20 [2022-03-01 18:42:24,216 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926430907] [2022-03-01 18:42:24,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:42:24,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 18:42:24,216 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:42:24,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 18:42:24,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:42:24,217 INFO L87 Difference]: Start difference. First operand 10491 states and 40472 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:42:26,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:42:26,377 INFO L93 Difference]: Finished difference Result 20619 states and 72607 transitions. [2022-03-01 18:42:26,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2022-03-01 18:42:26,377 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:42:26,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:42:26,428 INFO L225 Difference]: With dead ends: 20619 [2022-03-01 18:42:26,428 INFO L226 Difference]: Without dead ends: 20571 [2022-03-01 18:42:26,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8609 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=4296, Invalid=17756, Unknown=0, NotChecked=0, Total=22052 [2022-03-01 18:42:26,430 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 753 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 1355 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 753 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 1519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 1355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:42:26,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [753 Valid, 425 Invalid, 1519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 1355 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 18:42:26,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20571 states. [2022-03-01 18:42:26,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20571 to 10513. [2022-03-01 18:42:26,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10513 states, 10512 states have (on average 3.8593036529680367) internal successors, (40569), 10512 states have internal predecessors, (40569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:42:26,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10513 states to 10513 states and 40569 transitions. [2022-03-01 18:42:26,759 INFO L78 Accepts]: Start accepts. Automaton has 10513 states and 40569 transitions. Word has length 30 [2022-03-01 18:42:26,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:42:26,759 INFO L470 AbstractCegarLoop]: Abstraction has 10513 states and 40569 transitions. [2022-03-01 18:42:26,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:42:26,759 INFO L276 IsEmpty]: Start isEmpty. Operand 10513 states and 40569 transitions. [2022-03-01 18:42:26,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:42:26,776 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:42:26,776 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:42:26,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-03-01 18:42:26,988 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 [2022-03-01 18:42:26,988 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:42:26,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:42:26,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1003077941, now seen corresponding path program 47 times [2022-03-01 18:42:26,988 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:42:26,988 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589295063] [2022-03-01 18:42:26,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:42:26,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:42:26,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:42:27,044 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:42:27,045 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:42:27,045 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589295063] [2022-03-01 18:42:27,045 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589295063] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:42:27,045 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650273485] [2022-03-01 18:42:27,045 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:42:27,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:42:27,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:42:27,046 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) [2022-03-01 18:42:27,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-01 18:42:27,092 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 18:42:27,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:42:27,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:42:27,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:42:27,195 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:42:27,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:42:27,295 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:42:27,295 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650273485] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:42:27,295 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:42:27,295 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 18 [2022-03-01 18:42:27,295 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993836452] [2022-03-01 18:42:27,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:42:27,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 18:42:27,295 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:42:27,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 18:42:27,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-03-01 18:42:27,296 INFO L87 Difference]: Start difference. First operand 10513 states and 40569 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:42:28,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:42:28,682 INFO L93 Difference]: Finished difference Result 21294 states and 74335 transitions. [2022-03-01 18:42:28,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-03-01 18:42:28,682 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:42:28,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:42:28,729 INFO L225 Difference]: With dead ends: 21294 [2022-03-01 18:42:28,729 INFO L226 Difference]: Without dead ends: 21234 [2022-03-01 18:42:28,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3973 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2362, Invalid=8350, Unknown=0, NotChecked=0, Total=10712 [2022-03-01 18:42:28,732 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 688 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 964 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 688 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 1071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:42:28,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [688 Valid, 362 Invalid, 1071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 964 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 18:42:28,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21234 states. [2022-03-01 18:42:29,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21234 to 10549. [2022-03-01 18:42:29,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10549 states, 10548 states have (on average 3.8569397042093287) internal successors, (40683), 10548 states have internal predecessors, (40683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:42:29,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10549 states to 10549 states and 40683 transitions. [2022-03-01 18:42:29,068 INFO L78 Accepts]: Start accepts. Automaton has 10549 states and 40683 transitions. Word has length 30 [2022-03-01 18:42:29,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:42:29,068 INFO L470 AbstractCegarLoop]: Abstraction has 10549 states and 40683 transitions. [2022-03-01 18:42:29,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:42:29,068 INFO L276 IsEmpty]: Start isEmpty. Operand 10549 states and 40683 transitions. [2022-03-01 18:42:29,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:42:29,086 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:42:29,086 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:42:29,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-03-01 18:42:29,294 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 [2022-03-01 18:42:29,294 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:42:29,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:42:29,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1799884623, now seen corresponding path program 48 times [2022-03-01 18:42:29,295 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:42:29,295 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135494753] [2022-03-01 18:42:29,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:42:29,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:42:29,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:42:29,347 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:42:29,348 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:42:29,348 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135494753] [2022-03-01 18:42:29,348 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135494753] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:42:29,348 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916942310] [2022-03-01 18:42:29,348 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:42:29,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:42:29,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:42:29,349 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) [2022-03-01 18:42:29,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-01 18:42:29,396 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-01 18:42:29,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:42:29,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:42:29,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:42:29,498 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:42:29,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:42:29,584 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:42:29,585 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916942310] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:42:29,585 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:42:29,585 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 18 [2022-03-01 18:42:29,585 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107161492] [2022-03-01 18:42:29,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:42:29,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 18:42:29,585 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:42:29,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 18:42:29,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2022-03-01 18:42:29,586 INFO L87 Difference]: Start difference. First operand 10549 states and 40683 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:42:30,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:42:30,608 INFO L93 Difference]: Finished difference Result 20594 states and 72770 transitions. [2022-03-01 18:42:30,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-01 18:42:30,609 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:42:30,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:42:30,664 INFO L225 Difference]: With dead ends: 20594 [2022-03-01 18:42:30,664 INFO L226 Difference]: Without dead ends: 20570 [2022-03-01 18:42:30,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2360 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1571, Invalid=5235, Unknown=0, NotChecked=0, Total=6806 [2022-03-01 18:42:30,665 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 685 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 685 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:42:30,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [685 Valid, 291 Invalid, 943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 18:42:30,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20570 states. [2022-03-01 18:42:31,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20570 to 10859. [2022-03-01 18:42:31,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10859 states, 10858 states have (on average 3.8277767544667527) internal successors, (41562), 10858 states have internal predecessors, (41562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:42:31,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10859 states to 10859 states and 41562 transitions. [2022-03-01 18:42:31,061 INFO L78 Accepts]: Start accepts. Automaton has 10859 states and 41562 transitions. Word has length 30 [2022-03-01 18:42:31,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:42:31,061 INFO L470 AbstractCegarLoop]: Abstraction has 10859 states and 41562 transitions. [2022-03-01 18:42:31,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:42:31,061 INFO L276 IsEmpty]: Start isEmpty. Operand 10859 states and 41562 transitions. [2022-03-01 18:42:31,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:42:31,082 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:42:31,082 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:42:31,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-03-01 18:42:31,282 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 [2022-03-01 18:42:31,283 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:42:31,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:42:31,283 INFO L85 PathProgramCache]: Analyzing trace with hash 2070394315, now seen corresponding path program 49 times [2022-03-01 18:42:31,283 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:42:31,283 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245922914] [2022-03-01 18:42:31,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:42:31,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:42:31,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:42:31,332 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:42:31,332 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:42:31,332 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245922914] [2022-03-01 18:42:31,333 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245922914] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:42:31,333 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293789744] [2022-03-01 18:42:31,333 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:42:31,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:42:31,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:42:31,340 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) [2022-03-01 18:42:31,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-01 18:42:31,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:42:31,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:42:31,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:42:31,503 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:42:31,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:42:31,576 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:42:31,576 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293789744] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:42:31,576 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:42:31,576 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 18 [2022-03-01 18:42:31,576 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14972537] [2022-03-01 18:42:31,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:42:31,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 18:42:31,576 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:42:31,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 18:42:31,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2022-03-01 18:42:31,577 INFO L87 Difference]: Start difference. First operand 10859 states and 41562 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:42:32,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:42:32,978 INFO L93 Difference]: Finished difference Result 21194 states and 74398 transitions. [2022-03-01 18:42:32,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-03-01 18:42:32,978 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:42:32,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:42:33,030 INFO L225 Difference]: With dead ends: 21194 [2022-03-01 18:42:33,030 INFO L226 Difference]: Without dead ends: 21194 [2022-03-01 18:42:33,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3013 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1812, Invalid=6378, Unknown=0, NotChecked=0, Total=8190 [2022-03-01 18:42:33,031 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 531 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 1119 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 1216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:42:33,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [531 Valid, 408 Invalid, 1216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1119 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 18:42:33,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21194 states. [2022-03-01 18:42:33,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21194 to 10615. [2022-03-01 18:42:33,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10615 states, 10614 states have (on average 3.8362540041454682) internal successors, (40718), 10614 states have internal predecessors, (40718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:42:33,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10615 states to 10615 states and 40718 transitions. [2022-03-01 18:42:33,362 INFO L78 Accepts]: Start accepts. Automaton has 10615 states and 40718 transitions. Word has length 30 [2022-03-01 18:42:33,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:42:33,363 INFO L470 AbstractCegarLoop]: Abstraction has 10615 states and 40718 transitions. [2022-03-01 18:42:33,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:42:33,363 INFO L276 IsEmpty]: Start isEmpty. Operand 10615 states and 40718 transitions. [2022-03-01 18:42:33,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:42:33,380 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:42:33,380 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:42:33,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-03-01 18:42:33,582 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 [2022-03-01 18:42:33,582 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:42:33,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:42:33,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1709119399, now seen corresponding path program 50 times [2022-03-01 18:42:33,583 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:42:33,583 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369953569] [2022-03-01 18:42:33,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:42:33,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:42:33,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:42:33,627 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:42:33,627 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:42:33,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369953569] [2022-03-01 18:42:33,627 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369953569] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:42:33,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625909267] [2022-03-01 18:42:33,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:42:33,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:42:33,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:42:33,629 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) [2022-03-01 18:42:33,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-01 18:42:33,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:42:33,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:42:33,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:42:33,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:42:33,725 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 18:42:33,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:42:33,784 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:42:33,784 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625909267] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:42:33,784 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:42:33,784 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 16 [2022-03-01 18:42:33,784 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887755904] [2022-03-01 18:42:33,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:42:33,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 18:42:33,785 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:42:33,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 18:42:33,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-03-01 18:42:33,785 INFO L87 Difference]: Start difference. First operand 10615 states and 40718 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 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) [2022-03-01 18:42:34,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:42:34,383 INFO L93 Difference]: Finished difference Result 18007 states and 64907 transitions. [2022-03-01 18:42:34,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-01 18:42:34,383 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 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 30 [2022-03-01 18:42:34,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:42:34,426 INFO L225 Difference]: With dead ends: 18007 [2022-03-01 18:42:34,426 INFO L226 Difference]: Without dead ends: 17983 [2022-03-01 18:42:34,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=755, Invalid=2551, Unknown=0, NotChecked=0, Total=3306 [2022-03-01 18:42:34,427 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 500 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:42:34,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [500 Valid, 305 Invalid, 834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 717 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:42:34,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17983 states. [2022-03-01 18:42:34,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17983 to 10712. [2022-03-01 18:42:34,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10712 states, 10711 states have (on average 3.8259732984782) internal successors, (40980), 10711 states have internal predecessors, (40980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:42:34,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10712 states to 10712 states and 40980 transitions. [2022-03-01 18:42:34,693 INFO L78 Accepts]: Start accepts. Automaton has 10712 states and 40980 transitions. Word has length 30 [2022-03-01 18:42:34,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:42:34,693 INFO L470 AbstractCegarLoop]: Abstraction has 10712 states and 40980 transitions. [2022-03-01 18:42:34,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 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) [2022-03-01 18:42:34,693 INFO L276 IsEmpty]: Start isEmpty. Operand 10712 states and 40980 transitions. [2022-03-01 18:42:34,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:42:34,711 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:42:34,711 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:42:34,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-03-01 18:42:34,927 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 [2022-03-01 18:42:34,927 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:42:34,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:42:34,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1875224879, now seen corresponding path program 51 times [2022-03-01 18:42:34,927 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:42:34,927 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508831071] [2022-03-01 18:42:34,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:42:34,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:42:34,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:42:34,964 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:42:34,965 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:42:34,965 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508831071] [2022-03-01 18:42:34,965 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508831071] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:42:34,965 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918964103] [2022-03-01 18:42:34,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:42:34,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:42:34,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:42:34,966 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) [2022-03-01 18:42:34,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-01 18:42:35,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:42:35,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:42:35,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 18:42:35,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:42:35,111 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:42:35,198 INFO L353 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2022-03-01 18:42:35,198 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2022-03-01 18:42:35,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:42:35,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:42:35,283 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-03-01 18:42:35,283 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 32 [2022-03-01 18:42:35,493 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:42:35,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:42:35,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:42:35,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:42:35,738 INFO L353 Elim1Store]: treesize reduction 15, result has 59.5 percent of original size [2022-03-01 18:42:35,739 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 38 [2022-03-01 18:42:35,934 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:42:35,934 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918964103] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:42:35,934 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:42:35,934 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 14] total 33 [2022-03-01 18:42:35,934 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787975416] [2022-03-01 18:42:35,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:42:35,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 18:42:35,934 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:42:35,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 18:42:35,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=901, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 18:42:35,935 INFO L87 Difference]: Start difference. First operand 10712 states and 40980 transitions. Second operand has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 33 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:42:48,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:42:48,017 INFO L93 Difference]: Finished difference Result 22235 states and 76160 transitions. [2022-03-01 18:42:48,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 315 states. [2022-03-01 18:42:48,017 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 33 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:42:48,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:42:48,066 INFO L225 Difference]: With dead ends: 22235 [2022-03-01 18:42:48,066 INFO L226 Difference]: Without dead ends: 21879 [2022-03-01 18:42:48,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 336 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53870 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=16043, Invalid=97863, Unknown=0, NotChecked=0, Total=113906 [2022-03-01 18:42:48,070 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 1776 mSDsluCounter, 2013 mSDsCounter, 0 mSdLazyCounter, 2795 mSolverCounterSat, 387 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1776 SdHoareTripleChecker+Valid, 1118 SdHoareTripleChecker+Invalid, 4267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 387 IncrementalHoareTripleChecker+Valid, 2795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1085 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:42:48,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1776 Valid, 1118 Invalid, 4267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [387 Valid, 2795 Invalid, 0 Unknown, 1085 Unchecked, 1.6s Time] [2022-03-01 18:42:48,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21879 states. [2022-03-01 18:42:48,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21879 to 10551. [2022-03-01 18:42:48,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10551 states, 10550 states have (on average 3.8341232227488153) internal successors, (40450), 10550 states have internal predecessors, (40450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:42:48,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10551 states to 10551 states and 40450 transitions. [2022-03-01 18:42:48,411 INFO L78 Accepts]: Start accepts. Automaton has 10551 states and 40450 transitions. Word has length 30 [2022-03-01 18:42:48,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:42:48,411 INFO L470 AbstractCegarLoop]: Abstraction has 10551 states and 40450 transitions. [2022-03-01 18:42:48,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 33 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:42:48,411 INFO L276 IsEmpty]: Start isEmpty. Operand 10551 states and 40450 transitions. [2022-03-01 18:42:48,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:42:48,428 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:42:48,428 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:42:48,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-03-01 18:42:48,631 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 [2022-03-01 18:42:48,631 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:42:48,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:42:48,632 INFO L85 PathProgramCache]: Analyzing trace with hash 898941043, now seen corresponding path program 52 times [2022-03-01 18:42:48,632 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:42:48,632 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689091276] [2022-03-01 18:42:48,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:42:48,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:42:48,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:42:48,676 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:42:48,676 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:42:48,676 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689091276] [2022-03-01 18:42:48,676 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689091276] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:42:48,676 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474945513] [2022-03-01 18:42:48,677 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:42:48,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:42:48,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:42:48,678 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) [2022-03-01 18:42:48,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-01 18:42:48,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:42:48,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:42:48,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:42:48,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:42:48,790 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 18:42:48,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:42:48,862 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:42:48,862 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474945513] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:42:48,862 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:42:48,862 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 15 [2022-03-01 18:42:48,862 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775956988] [2022-03-01 18:42:48,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:42:48,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 18:42:48,862 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:42:48,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 18:42:48,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-03-01 18:42:48,863 INFO L87 Difference]: Start difference. First operand 10551 states and 40450 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 15 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) [2022-03-01 18:42:49,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:42:49,074 INFO L93 Difference]: Finished difference Result 13750 states and 51008 transitions. [2022-03-01 18:42:49,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 18:42:49,074 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 15 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) Word has length 30 [2022-03-01 18:42:49,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:42:49,106 INFO L225 Difference]: With dead ends: 13750 [2022-03-01 18:42:49,106 INFO L226 Difference]: Without dead ends: 13710 [2022-03-01 18:42:49,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=203, Invalid=349, Unknown=0, NotChecked=0, Total=552 [2022-03-01 18:42:49,107 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 208 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:42:49,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 85 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:42:49,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13710 states. [2022-03-01 18:42:49,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13710 to 10277. [2022-03-01 18:42:49,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10277 states, 10276 states have (on average 3.822109770338653) internal successors, (39276), 10276 states have internal predecessors, (39276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:42:49,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10277 states to 10277 states and 39276 transitions. [2022-03-01 18:42:49,388 INFO L78 Accepts]: Start accepts. Automaton has 10277 states and 39276 transitions. Word has length 30 [2022-03-01 18:42:49,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:42:49,389 INFO L470 AbstractCegarLoop]: Abstraction has 10277 states and 39276 transitions. [2022-03-01 18:42:49,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 15 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) [2022-03-01 18:42:49,389 INFO L276 IsEmpty]: Start isEmpty. Operand 10277 states and 39276 transitions. [2022-03-01 18:42:49,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:42:49,406 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:42:49,406 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:42:49,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-03-01 18:42:49,611 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 [2022-03-01 18:42:49,611 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:42:49,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:42:49,612 INFO L85 PathProgramCache]: Analyzing trace with hash -243984997, now seen corresponding path program 53 times [2022-03-01 18:42:49,612 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:42:49,612 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975404409] [2022-03-01 18:42:49,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:42:49,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:42:49,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:42:49,644 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:42:49,644 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:42:49,644 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975404409] [2022-03-01 18:42:49,644 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975404409] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:42:49,644 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948913401] [2022-03-01 18:42:49,644 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:42:49,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:42:49,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:42:49,645 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) [2022-03-01 18:42:49,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-01 18:42:49,696 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 18:42:49,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:42:49,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:42:49,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:42:49,786 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 18:42:49,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:42:49,882 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:42:49,882 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948913401] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:42:49,882 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:42:49,882 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 15 [2022-03-01 18:42:49,882 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022934413] [2022-03-01 18:42:49,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:42:49,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 18:42:49,882 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:42:49,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 18:42:49,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2022-03-01 18:42:49,893 INFO L87 Difference]: Start difference. First operand 10277 states and 39276 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 15 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) [2022-03-01 18:42:50,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:42:50,352 INFO L93 Difference]: Finished difference Result 15943 states and 57174 transitions. [2022-03-01 18:42:50,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 18:42:50,352 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 15 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) Word has length 30 [2022-03-01 18:42:50,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:42:50,401 INFO L225 Difference]: With dead ends: 15943 [2022-03-01 18:42:50,402 INFO L226 Difference]: Without dead ends: 15943 [2022-03-01 18:42:50,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=462, Invalid=944, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 18:42:50,402 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 420 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:42:50,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [420 Valid, 122 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:42:50,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15943 states. [2022-03-01 18:42:50,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15943 to 11669. [2022-03-01 18:42:50,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11669 states, 11668 states have (on average 3.842817963661296) internal successors, (44838), 11668 states have internal predecessors, (44838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:42:50,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11669 states to 11669 states and 44838 transitions. [2022-03-01 18:42:50,932 INFO L78 Accepts]: Start accepts. Automaton has 11669 states and 44838 transitions. Word has length 30 [2022-03-01 18:42:50,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:42:50,932 INFO L470 AbstractCegarLoop]: Abstraction has 11669 states and 44838 transitions. [2022-03-01 18:42:50,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 15 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) [2022-03-01 18:42:50,932 INFO L276 IsEmpty]: Start isEmpty. Operand 11669 states and 44838 transitions. [2022-03-01 18:42:50,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:42:50,951 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:42:50,951 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:42:50,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-03-01 18:42:51,161 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 [2022-03-01 18:42:51,162 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:42:51,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:42:51,162 INFO L85 PathProgramCache]: Analyzing trace with hash 14810327, now seen corresponding path program 54 times [2022-03-01 18:42:51,162 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:42:51,162 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390180602] [2022-03-01 18:42:51,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:42:51,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:42:51,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:42:51,226 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:42:51,226 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:42:51,226 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390180602] [2022-03-01 18:42:51,226 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390180602] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:42:51,226 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601921607] [2022-03-01 18:42:51,226 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:42:51,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:42:51,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:42:51,228 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:42:51,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-01 18:42:51,275 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:42:51,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:42:51,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:42:51,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:42:51,378 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 18:42:51,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:42:51,475 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:42:51,475 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601921607] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:42:51,475 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:42:51,475 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 13 [2022-03-01 18:42:51,475 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303762597] [2022-03-01 18:42:51,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:42:51,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 18:42:51,475 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:42:51,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 18:42:51,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-03-01 18:42:51,476 INFO L87 Difference]: Start difference. First operand 11669 states and 44838 transitions. Second operand has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 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) [2022-03-01 18:42:51,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:42:51,790 INFO L93 Difference]: Finished difference Result 14497 states and 53134 transitions. [2022-03-01 18:42:51,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 18:42:51,790 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 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 30 [2022-03-01 18:42:51,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:42:51,825 INFO L225 Difference]: With dead ends: 14497 [2022-03-01 18:42:51,825 INFO L226 Difference]: Without dead ends: 14497 [2022-03-01 18:42:51,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=256, Invalid=556, Unknown=0, NotChecked=0, Total=812 [2022-03-01 18:42:51,826 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 249 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:42:51,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 93 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:42:51,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14497 states. [2022-03-01 18:42:52,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14497 to 11861. [2022-03-01 18:42:52,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11861 states, 11860 states have (on average 3.8397133220910624) internal successors, (45539), 11860 states have internal predecessors, (45539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:42:52,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11861 states to 11861 states and 45539 transitions. [2022-03-01 18:42:52,197 INFO L78 Accepts]: Start accepts. Automaton has 11861 states and 45539 transitions. Word has length 30 [2022-03-01 18:42:52,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:42:52,197 INFO L470 AbstractCegarLoop]: Abstraction has 11861 states and 45539 transitions. [2022-03-01 18:42:52,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 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) [2022-03-01 18:42:52,197 INFO L276 IsEmpty]: Start isEmpty. Operand 11861 states and 45539 transitions. [2022-03-01 18:42:52,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:42:52,220 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:42:52,220 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:42:52,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-03-01 18:42:52,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:42:52,422 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:42:52,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:42:52,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1974130723, now seen corresponding path program 55 times [2022-03-01 18:42:52,423 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:42:52,423 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302518920] [2022-03-01 18:42:52,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:42:52,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:42:52,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:42:52,482 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:42:52,482 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:42:52,482 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302518920] [2022-03-01 18:42:52,482 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302518920] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:42:52,482 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880653860] [2022-03-01 18:42:52,482 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:42:52,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:42:52,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:42:52,488 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:42:52,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-01 18:42:52,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:42:52,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:42:52,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:42:52,639 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:42:52,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:42:52,743 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:42:52,743 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880653860] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:42:52,743 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:42:52,743 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 16 [2022-03-01 18:42:52,743 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936731594] [2022-03-01 18:42:52,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:42:52,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 18:42:52,744 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:42:52,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 18:42:52,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-03-01 18:42:52,744 INFO L87 Difference]: Start difference. First operand 11861 states and 45539 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:42:54,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:42:54,159 INFO L93 Difference]: Finished difference Result 25004 states and 87435 transitions. [2022-03-01 18:42:54,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-03-01 18:42:54,159 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:42:54,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:42:54,227 INFO L225 Difference]: With dead ends: 25004 [2022-03-01 18:42:54,227 INFO L226 Difference]: Without dead ends: 25004 [2022-03-01 18:42:54,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3376 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1732, Invalid=6640, Unknown=0, NotChecked=0, Total=8372 [2022-03-01 18:42:54,228 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 619 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 619 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:42:54,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [619 Valid, 329 Invalid, 931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 802 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 18:42:54,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25004 states. [2022-03-01 18:42:54,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25004 to 13016. [2022-03-01 18:42:54,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13016 states, 13015 states have (on average 3.8539377641183252) internal successors, (50159), 13015 states have internal predecessors, (50159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:42:54,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13016 states to 13016 states and 50159 transitions. [2022-03-01 18:42:54,765 INFO L78 Accepts]: Start accepts. Automaton has 13016 states and 50159 transitions. Word has length 30 [2022-03-01 18:42:54,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:42:54,765 INFO L470 AbstractCegarLoop]: Abstraction has 13016 states and 50159 transitions. [2022-03-01 18:42:54,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:42:54,765 INFO L276 IsEmpty]: Start isEmpty. Operand 13016 states and 50159 transitions. [2022-03-01 18:42:54,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:42:54,795 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:42:54,795 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:42:54,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-03-01 18:42:55,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:42:55,019 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:42:55,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:42:55,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1442224409, now seen corresponding path program 56 times [2022-03-01 18:42:55,020 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:42:55,020 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024664003] [2022-03-01 18:42:55,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:42:55,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:42:55,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:42:55,066 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:42:55,066 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:42:55,066 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024664003] [2022-03-01 18:42:55,066 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024664003] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:42:55,066 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080901320] [2022-03-01 18:42:55,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:42:55,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:42:55,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:42:55,076 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:42:55,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-01 18:42:55,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:42:55,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:42:55,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:42:55,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:42:55,210 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:42:55,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:42:55,298 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:42:55,299 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080901320] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:42:55,299 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:42:55,299 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 15 [2022-03-01 18:42:55,299 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166170273] [2022-03-01 18:42:55,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:42:55,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 18:42:55,299 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:42:55,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 18:42:55,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2022-03-01 18:42:55,299 INFO L87 Difference]: Start difference. First operand 13016 states and 50159 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:42:56,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:42:56,226 INFO L93 Difference]: Finished difference Result 23852 states and 84334 transitions. [2022-03-01 18:42:56,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-01 18:42:56,227 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:42:56,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:42:56,285 INFO L225 Difference]: With dead ends: 23852 [2022-03-01 18:42:56,285 INFO L226 Difference]: Without dead ends: 23840 [2022-03-01 18:42:56,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2356 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1293, Invalid=4869, Unknown=0, NotChecked=0, Total=6162 [2022-03-01 18:42:56,286 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 602 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:42:56,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [602 Valid, 276 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:42:56,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23840 states. [2022-03-01 18:42:56,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23840 to 12938. [2022-03-01 18:42:56,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12938 states, 12937 states have (on average 3.859472829867821) internal successors, (49930), 12937 states have internal predecessors, (49930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:42:56,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12938 states to 12938 states and 49930 transitions. [2022-03-01 18:42:56,687 INFO L78 Accepts]: Start accepts. Automaton has 12938 states and 49930 transitions. Word has length 30 [2022-03-01 18:42:56,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:42:56,687 INFO L470 AbstractCegarLoop]: Abstraction has 12938 states and 49930 transitions. [2022-03-01 18:42:56,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:42:56,687 INFO L276 IsEmpty]: Start isEmpty. Operand 12938 states and 49930 transitions. [2022-03-01 18:42:56,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:42:56,716 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:42:56,716 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:42:56,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-03-01 18:42:56,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2022-03-01 18:42:56,920 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:42:56,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:42:56,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1246161191, now seen corresponding path program 57 times [2022-03-01 18:42:56,921 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:42:56,921 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469359096] [2022-03-01 18:42:56,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:42:56,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:42:56,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:42:56,978 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:42:56,978 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:42:56,978 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469359096] [2022-03-01 18:42:56,978 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469359096] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:42:56,978 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337492788] [2022-03-01 18:42:56,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:42:56,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:42:56,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:42:56,980 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:42:56,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-03-01 18:42:57,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 18:42:57,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:42:57,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:42:57,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:42:57,168 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:42:57,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:42:57,263 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:42:57,263 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337492788] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:42:57,263 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:42:57,263 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 16 [2022-03-01 18:42:57,263 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574395870] [2022-03-01 18:42:57,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:42:57,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 18:42:57,263 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:42:57,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 18:42:57,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-03-01 18:42:57,264 INFO L87 Difference]: Start difference. First operand 12938 states and 49930 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:42:58,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:42:58,165 INFO L93 Difference]: Finished difference Result 22366 states and 80695 transitions. [2022-03-01 18:42:58,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-01 18:42:58,165 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:42:58,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:42:58,228 INFO L225 Difference]: With dead ends: 22366 [2022-03-01 18:42:58,228 INFO L226 Difference]: Without dead ends: 22334 [2022-03-01 18:42:58,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1472 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=911, Invalid=3511, Unknown=0, NotChecked=0, Total=4422 [2022-03-01 18:42:58,229 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 470 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:42:58,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [470 Valid, 225 Invalid, 730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:42:58,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22334 states. [2022-03-01 18:42:58,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22334 to 12881. [2022-03-01 18:42:58,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12881 states, 12880 states have (on average 3.864829192546584) internal successors, (49779), 12880 states have internal predecessors, (49779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:42:58,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12881 states to 12881 states and 49779 transitions. [2022-03-01 18:42:58,726 INFO L78 Accepts]: Start accepts. Automaton has 12881 states and 49779 transitions. Word has length 30 [2022-03-01 18:42:58,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:42:58,727 INFO L470 AbstractCegarLoop]: Abstraction has 12881 states and 49779 transitions. [2022-03-01 18:42:58,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:42:58,727 INFO L276 IsEmpty]: Start isEmpty. Operand 12881 states and 49779 transitions. [2022-03-01 18:42:58,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:42:58,754 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:42:58,755 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:42:58,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-03-01 18:42:58,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:42:58,971 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:42:58,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:42:58,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1525545573, now seen corresponding path program 58 times [2022-03-01 18:42:58,971 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:42:58,971 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399257082] [2022-03-01 18:42:58,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:42:58,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:42:58,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:42:59,004 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:42:59,004 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:42:59,004 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399257082] [2022-03-01 18:42:59,004 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399257082] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:42:59,004 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028145973] [2022-03-01 18:42:59,004 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:42:59,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:42:59,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:42:59,005 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:42:59,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-03-01 18:42:59,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:42:59,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:42:59,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:42:59,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:42:59,139 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:42:59,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:42:59,225 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:42:59,225 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028145973] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:42:59,226 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:42:59,226 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2022-03-01 18:42:59,226 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916405646] [2022-03-01 18:42:59,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:42:59,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-01 18:42:59,227 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:42:59,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-01 18:42:59,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-03-01 18:42:59,228 INFO L87 Difference]: Start difference. First operand 12881 states and 49779 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:42:59,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:42:59,537 INFO L93 Difference]: Finished difference Result 14655 states and 54802 transitions. [2022-03-01 18:42:59,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 18:42:59,537 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:42:59,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:42:59,575 INFO L225 Difference]: With dead ends: 14655 [2022-03-01 18:42:59,575 INFO L226 Difference]: Without dead ends: 14655 [2022-03-01 18:42:59,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=195, Invalid=455, Unknown=0, NotChecked=0, Total=650 [2022-03-01 18:42:59,576 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 186 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:42:59,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 82 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:42:59,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14655 states. [2022-03-01 18:42:59,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14655 to 12646. [2022-03-01 18:42:59,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12646 states, 12645 states have (on average 3.868880980624753) internal successors, (48922), 12645 states have internal predecessors, (48922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:42:59,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12646 states to 12646 states and 48922 transitions. [2022-03-01 18:42:59,841 INFO L78 Accepts]: Start accepts. Automaton has 12646 states and 48922 transitions. Word has length 30 [2022-03-01 18:42:59,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:42:59,841 INFO L470 AbstractCegarLoop]: Abstraction has 12646 states and 48922 transitions. [2022-03-01 18:42:59,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:42:59,841 INFO L276 IsEmpty]: Start isEmpty. Operand 12646 states and 48922 transitions. [2022-03-01 18:42:59,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:42:59,911 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:42:59,911 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:42:59,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-03-01 18:43:00,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:43:00,124 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:43:00,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:43:00,125 INFO L85 PathProgramCache]: Analyzing trace with hash -435342281, now seen corresponding path program 59 times [2022-03-01 18:43:00,125 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:43:00,125 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493105439] [2022-03-01 18:43:00,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:43:00,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:43:00,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:43:00,171 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:43:00,171 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:43:00,171 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493105439] [2022-03-01 18:43:00,171 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493105439] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:43:00,171 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42101383] [2022-03-01 18:43:00,171 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:43:00,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:43:00,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:43:00,173 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:43:00,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-03-01 18:43:00,250 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 18:43:00,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:43:00,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:43:00,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:43:00,338 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:43:00,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:43:00,412 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:43:00,412 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42101383] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:43:00,412 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:43:00,412 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 15 [2022-03-01 18:43:00,412 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936683624] [2022-03-01 18:43:00,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:43:00,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 18:43:00,412 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:43:00,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 18:43:00,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-03-01 18:43:00,413 INFO L87 Difference]: Start difference. First operand 12646 states and 48922 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:01,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:43:01,260 INFO L93 Difference]: Finished difference Result 21690 states and 78211 transitions. [2022-03-01 18:43:01,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-01 18:43:01,260 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:43:01,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:43:01,321 INFO L225 Difference]: With dead ends: 21690 [2022-03-01 18:43:01,321 INFO L226 Difference]: Without dead ends: 21690 [2022-03-01 18:43:01,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1422 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=903, Invalid=3129, Unknown=0, NotChecked=0, Total=4032 [2022-03-01 18:43:01,322 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 398 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:43:01,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [398 Valid, 308 Invalid, 851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:43:01,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21690 states. [2022-03-01 18:43:01,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21690 to 13376. [2022-03-01 18:43:01,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13376 states, 13375 states have (on average 3.8450841121495327) internal successors, (51428), 13375 states have internal predecessors, (51428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:01,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13376 states to 13376 states and 51428 transitions. [2022-03-01 18:43:01,772 INFO L78 Accepts]: Start accepts. Automaton has 13376 states and 51428 transitions. Word has length 30 [2022-03-01 18:43:01,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:43:01,773 INFO L470 AbstractCegarLoop]: Abstraction has 13376 states and 51428 transitions. [2022-03-01 18:43:01,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:01,773 INFO L276 IsEmpty]: Start isEmpty. Operand 13376 states and 51428 transitions. [2022-03-01 18:43:01,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:43:01,805 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:43:01,805 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:43:01,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-03-01 18:43:02,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:43:02,023 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:43:02,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:43:02,024 INFO L85 PathProgramCache]: Analyzing trace with hash 96564033, now seen corresponding path program 60 times [2022-03-01 18:43:02,024 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:43:02,024 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122810479] [2022-03-01 18:43:02,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:43:02,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:43:02,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:43:02,068 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:43:02,068 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:43:02,068 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122810479] [2022-03-01 18:43:02,068 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122810479] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:43:02,068 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951490846] [2022-03-01 18:43:02,068 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:43:02,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:43:02,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:43:02,069 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:43:02,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-03-01 18:43:02,134 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-01 18:43:02,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:43:02,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:43:02,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:43:02,206 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:43:02,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:43:02,286 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:43:02,286 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951490846] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:43:02,286 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:43:02,286 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-03-01 18:43:02,286 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204444499] [2022-03-01 18:43:02,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:43:02,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 18:43:02,287 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:43:02,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 18:43:02,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-03-01 18:43:02,287 INFO L87 Difference]: Start difference. First operand 13376 states and 51428 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:02,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:43:02,855 INFO L93 Difference]: Finished difference Result 20800 states and 75794 transitions. [2022-03-01 18:43:02,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-01 18:43:02,856 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:43:02,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:43:02,929 INFO L225 Difference]: With dead ends: 20800 [2022-03-01 18:43:02,929 INFO L226 Difference]: Without dead ends: 20788 [2022-03-01 18:43:02,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=608, Invalid=2044, Unknown=0, NotChecked=0, Total=2652 [2022-03-01 18:43:02,930 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 382 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:43:02,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [382 Valid, 235 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:43:02,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20788 states. [2022-03-01 18:43:03,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20788 to 13222. [2022-03-01 18:43:03,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13222 states, 13221 states have (on average 3.855911050601316) internal successors, (50979), 13221 states have internal predecessors, (50979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:03,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13222 states to 13222 states and 50979 transitions. [2022-03-01 18:43:03,568 INFO L78 Accepts]: Start accepts. Automaton has 13222 states and 50979 transitions. Word has length 30 [2022-03-01 18:43:03,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:43:03,569 INFO L470 AbstractCegarLoop]: Abstraction has 13222 states and 50979 transitions. [2022-03-01 18:43:03,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:03,569 INFO L276 IsEmpty]: Start isEmpty. Operand 13222 states and 50979 transitions. [2022-03-01 18:43:03,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:43:03,599 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:43:03,599 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:43:03,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-03-01 18:43:03,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:43:03,816 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:43:03,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:43:03,816 INFO L85 PathProgramCache]: Analyzing trace with hash -542841171, now seen corresponding path program 61 times [2022-03-01 18:43:03,816 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:43:03,816 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761009543] [2022-03-01 18:43:03,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:43:03,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:43:03,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:43:03,930 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:43:03,930 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:43:03,930 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761009543] [2022-03-01 18:43:03,930 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761009543] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:43:03,930 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352081198] [2022-03-01 18:43:03,930 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:43:03,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:43:03,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:43:03,931 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:43:03,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-03-01 18:43:03,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:43:03,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:43:03,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:43:04,067 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:43:04,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:43:04,150 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:43:04,150 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352081198] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:43:04,150 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:43:04,150 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 15 [2022-03-01 18:43:04,150 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019623505] [2022-03-01 18:43:04,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:43:04,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 18:43:04,150 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:43:04,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 18:43:04,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-03-01 18:43:04,151 INFO L87 Difference]: Start difference. First operand 13222 states and 50979 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:04,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:43:04,713 INFO L93 Difference]: Finished difference Result 20946 states and 76381 transitions. [2022-03-01 18:43:04,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-01 18:43:04,713 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:43:04,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:43:04,771 INFO L225 Difference]: With dead ends: 20946 [2022-03-01 18:43:04,771 INFO L226 Difference]: Without dead ends: 20926 [2022-03-01 18:43:04,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=574, Invalid=2182, Unknown=0, NotChecked=0, Total=2756 [2022-03-01 18:43:04,772 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 390 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:43:04,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [390 Valid, 233 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:43:04,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20926 states. [2022-03-01 18:43:05,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20926 to 13408. [2022-03-01 18:43:05,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13408 states, 13407 states have (on average 3.8412769448795405) internal successors, (51500), 13407 states have internal predecessors, (51500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:05,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13408 states to 13408 states and 51500 transitions. [2022-03-01 18:43:05,268 INFO L78 Accepts]: Start accepts. Automaton has 13408 states and 51500 transitions. Word has length 30 [2022-03-01 18:43:05,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:43:05,268 INFO L470 AbstractCegarLoop]: Abstraction has 13408 states and 51500 transitions. [2022-03-01 18:43:05,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:05,268 INFO L276 IsEmpty]: Start isEmpty. Operand 13408 states and 51500 transitions. [2022-03-01 18:43:05,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:43:05,298 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:43:05,298 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:43:05,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-03-01 18:43:05,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:43:05,511 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:43:05,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:43:05,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1968514673, now seen corresponding path program 62 times [2022-03-01 18:43:05,512 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:43:05,512 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861764157] [2022-03-01 18:43:05,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:43:05,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:43:05,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:43:05,560 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:43:05,561 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:43:05,561 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861764157] [2022-03-01 18:43:05,561 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861764157] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:43:05,561 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068692741] [2022-03-01 18:43:05,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:43:05,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:43:05,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:43:05,562 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:43:05,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-03-01 18:43:05,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:43:05,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:43:05,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:43:05,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:43:05,726 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:43:05,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:43:05,815 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:43:05,815 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068692741] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:43:05,815 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:43:05,815 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-01 18:43:05,815 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84254986] [2022-03-01 18:43:05,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:43:05,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:43:05,816 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:43:05,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:43:05,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:43:05,816 INFO L87 Difference]: Start difference. First operand 13408 states and 51500 transitions. Second operand has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:07,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:43:07,352 INFO L93 Difference]: Finished difference Result 19415 states and 69884 transitions. [2022-03-01 18:43:07,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-03-01 18:43:07,352 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:43:07,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:43:07,408 INFO L225 Difference]: With dead ends: 19415 [2022-03-01 18:43:07,408 INFO L226 Difference]: Without dead ends: 19415 [2022-03-01 18:43:07,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4263 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2280, Invalid=9276, Unknown=0, NotChecked=0, Total=11556 [2022-03-01 18:43:07,409 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 492 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 1382 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 1472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:43:07,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [492 Valid, 456 Invalid, 1472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1382 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 18:43:07,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19415 states. [2022-03-01 18:43:07,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19415 to 14051. [2022-03-01 18:43:07,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14051 states, 14050 states have (on average 3.817224199288256) internal successors, (53632), 14050 states have internal predecessors, (53632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:07,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14051 states to 14051 states and 53632 transitions. [2022-03-01 18:43:07,836 INFO L78 Accepts]: Start accepts. Automaton has 14051 states and 53632 transitions. Word has length 30 [2022-03-01 18:43:07,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:43:07,836 INFO L470 AbstractCegarLoop]: Abstraction has 14051 states and 53632 transitions. [2022-03-01 18:43:07,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:07,836 INFO L276 IsEmpty]: Start isEmpty. Operand 14051 states and 53632 transitions. [2022-03-01 18:43:07,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:43:07,863 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:43:07,863 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:43:07,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-03-01 18:43:08,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-03-01 18:43:08,080 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:43:08,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:43:08,080 INFO L85 PathProgramCache]: Analyzing trace with hash -341365967, now seen corresponding path program 63 times [2022-03-01 18:43:08,080 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:43:08,080 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940907926] [2022-03-01 18:43:08,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:43:08,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:43:08,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:43:08,112 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:43:08,112 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:43:08,112 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940907926] [2022-03-01 18:43:08,112 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940907926] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:43:08,112 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176090773] [2022-03-01 18:43:08,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:43:08,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:43:08,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:43:08,114 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:43:08,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-03-01 18:43:08,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 18:43:08,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:43:08,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:43:08,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:43:08,224 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:43:08,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:43:08,301 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:43:08,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176090773] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:43:08,301 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:43:08,302 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 21 [2022-03-01 18:43:08,302 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838310335] [2022-03-01 18:43:08,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:43:08,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:43:08,302 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:43:08,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:43:08,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:43:08,302 INFO L87 Difference]: Start difference. First operand 14051 states and 53632 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:09,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:43:09,384 INFO L93 Difference]: Finished difference Result 18580 states and 67695 transitions. [2022-03-01 18:43:09,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-01 18:43:09,384 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:43:09,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:43:09,438 INFO L225 Difference]: With dead ends: 18580 [2022-03-01 18:43:09,439 INFO L226 Difference]: Without dead ends: 18572 [2022-03-01 18:43:09,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2359 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1558, Invalid=5582, Unknown=0, NotChecked=0, Total=7140 [2022-03-01 18:43:09,439 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 410 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 987 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 1074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:43:09,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [410 Valid, 308 Invalid, 1074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 987 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:43:09,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18572 states. [2022-03-01 18:43:09,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18572 to 13997. [2022-03-01 18:43:09,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13997 states, 13996 states have (on average 3.819734209774221) internal successors, (53461), 13996 states have internal predecessors, (53461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:09,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13997 states to 13997 states and 53461 transitions. [2022-03-01 18:43:09,892 INFO L78 Accepts]: Start accepts. Automaton has 13997 states and 53461 transitions. Word has length 30 [2022-03-01 18:43:09,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:43:09,892 INFO L470 AbstractCegarLoop]: Abstraction has 13997 states and 53461 transitions. [2022-03-01 18:43:09,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:09,892 INFO L276 IsEmpty]: Start isEmpty. Operand 13997 states and 53461 transitions. [2022-03-01 18:43:09,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:43:09,922 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:43:09,922 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:43:09,940 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-03-01 18:43:10,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:43:10,135 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:43:10,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:43:10,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1508609255, now seen corresponding path program 64 times [2022-03-01 18:43:10,136 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:43:10,136 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465162075] [2022-03-01 18:43:10,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:43:10,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:43:10,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:43:10,187 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:43:10,187 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:43:10,203 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465162075] [2022-03-01 18:43:10,203 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465162075] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:43:10,203 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908125748] [2022-03-01 18:43:10,203 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:43:10,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:43:10,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:43:10,205 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:43:10,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-03-01 18:43:10,258 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:43:10,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:43:10,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:43:10,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:43:10,373 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:43:10,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:43:10,513 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:43:10,514 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908125748] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:43:10,514 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:43:10,514 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 22 [2022-03-01 18:43:10,514 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554905933] [2022-03-01 18:43:10,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:43:10,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 18:43:10,514 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:43:10,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 18:43:10,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2022-03-01 18:43:10,515 INFO L87 Difference]: Start difference. First operand 13997 states and 53461 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:11,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:43:11,889 INFO L93 Difference]: Finished difference Result 20422 states and 72750 transitions. [2022-03-01 18:43:11,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-03-01 18:43:11,889 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:43:11,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:43:11,956 INFO L225 Difference]: With dead ends: 20422 [2022-03-01 18:43:11,956 INFO L226 Difference]: Without dead ends: 20422 [2022-03-01 18:43:11,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4394 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2164, Invalid=8966, Unknown=0, NotChecked=0, Total=11130 [2022-03-01 18:43:11,957 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 572 mSDsluCounter, 794 mSDsCounter, 0 mSdLazyCounter, 1269 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 572 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 1398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 1269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:43:11,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [572 Valid, 489 Invalid, 1398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 1269 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 18:43:11,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20422 states. [2022-03-01 18:43:12,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20422 to 14517. [2022-03-01 18:43:12,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14517 states, 14516 states have (on average 3.8018049049324882) internal successors, (55187), 14516 states have internal predecessors, (55187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:12,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14517 states to 14517 states and 55187 transitions. [2022-03-01 18:43:12,457 INFO L78 Accepts]: Start accepts. Automaton has 14517 states and 55187 transitions. Word has length 30 [2022-03-01 18:43:12,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:43:12,457 INFO L470 AbstractCegarLoop]: Abstraction has 14517 states and 55187 transitions. [2022-03-01 18:43:12,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:12,457 INFO L276 IsEmpty]: Start isEmpty. Operand 14517 states and 55187 transitions. [2022-03-01 18:43:12,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:43:12,487 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:43:12,488 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:43:12,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-03-01 18:43:12,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:43:12,703 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:43:12,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:43:12,704 INFO L85 PathProgramCache]: Analyzing trace with hash 453231861, now seen corresponding path program 65 times [2022-03-01 18:43:12,704 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:43:12,704 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335527275] [2022-03-01 18:43:12,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:43:12,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:43:12,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:43:12,739 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:43:12,739 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:43:12,740 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335527275] [2022-03-01 18:43:12,740 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335527275] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:43:12,740 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009245279] [2022-03-01 18:43:12,740 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:43:12,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:43:12,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:43:12,741 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:43:12,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-03-01 18:43:12,792 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 18:43:12,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:43:12,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:43:12,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:43:12,861 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:43:12,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:43:12,937 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:43:12,938 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009245279] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:43:12,938 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:43:12,938 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 22 [2022-03-01 18:43:12,938 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416595709] [2022-03-01 18:43:12,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:43:12,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 18:43:12,938 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:43:12,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 18:43:12,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2022-03-01 18:43:12,938 INFO L87 Difference]: Start difference. First operand 14517 states and 55187 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:13,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:43:13,881 INFO L93 Difference]: Finished difference Result 19474 states and 70379 transitions. [2022-03-01 18:43:13,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-03-01 18:43:13,881 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:43:13,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:43:13,937 INFO L225 Difference]: With dead ends: 19474 [2022-03-01 18:43:13,937 INFO L226 Difference]: Without dead ends: 19466 [2022-03-01 18:43:13,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2774 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1617, Invalid=6215, Unknown=0, NotChecked=0, Total=7832 [2022-03-01 18:43:13,939 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 508 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 909 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 1035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:43:13,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [508 Valid, 323 Invalid, 1035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 909 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:43:13,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19466 states. [2022-03-01 18:43:14,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19466 to 14517. [2022-03-01 18:43:14,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14517 states, 14516 states have (on average 3.8015293469275284) internal successors, (55183), 14516 states have internal predecessors, (55183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:14,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14517 states to 14517 states and 55183 transitions. [2022-03-01 18:43:14,408 INFO L78 Accepts]: Start accepts. Automaton has 14517 states and 55183 transitions. Word has length 30 [2022-03-01 18:43:14,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:43:14,408 INFO L470 AbstractCegarLoop]: Abstraction has 14517 states and 55183 transitions. [2022-03-01 18:43:14,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:14,409 INFO L276 IsEmpty]: Start isEmpty. Operand 14517 states and 55183 transitions. [2022-03-01 18:43:14,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:43:14,438 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:43:14,438 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:43:14,456 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-03-01 18:43:14,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:43:14,655 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:43:14,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:43:14,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1936366799, now seen corresponding path program 66 times [2022-03-01 18:43:14,656 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:43:14,656 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321865937] [2022-03-01 18:43:14,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:43:14,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:43:14,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:43:14,703 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:43:14,704 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:43:14,704 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321865937] [2022-03-01 18:43:14,704 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321865937] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:43:14,704 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242854294] [2022-03-01 18:43:14,704 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:43:14,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:43:14,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:43:14,706 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:43:14,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-03-01 18:43:14,762 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 18:43:14,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:43:14,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:43:14,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:43:14,854 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:43:14,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:43:14,970 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:43:14,970 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242854294] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:43:14,970 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:43:14,971 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 20 [2022-03-01 18:43:14,971 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801259524] [2022-03-01 18:43:14,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:43:14,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 18:43:14,971 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:43:14,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 18:43:14,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:43:14,971 INFO L87 Difference]: Start difference. First operand 14517 states and 55183 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:15,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:43:15,971 INFO L93 Difference]: Finished difference Result 19234 states and 69889 transitions. [2022-03-01 18:43:15,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-01 18:43:15,972 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:43:15,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:43:16,036 INFO L225 Difference]: With dead ends: 19234 [2022-03-01 18:43:16,036 INFO L226 Difference]: Without dead ends: 19210 [2022-03-01 18:43:16,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1922 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1170, Invalid=4530, Unknown=0, NotChecked=0, Total=5700 [2022-03-01 18:43:16,037 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 456 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 909 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 1032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:43:16,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [456 Valid, 320 Invalid, 1032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 909 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:43:16,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19210 states. [2022-03-01 18:43:16,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19210 to 14517. [2022-03-01 18:43:16,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14517 states, 14516 states have (on average 3.8009782309176083) internal successors, (55175), 14516 states have internal predecessors, (55175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:16,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14517 states to 14517 states and 55175 transitions. [2022-03-01 18:43:16,582 INFO L78 Accepts]: Start accepts. Automaton has 14517 states and 55175 transitions. Word has length 30 [2022-03-01 18:43:16,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:43:16,582 INFO L470 AbstractCegarLoop]: Abstraction has 14517 states and 55175 transitions. [2022-03-01 18:43:16,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:16,582 INFO L276 IsEmpty]: Start isEmpty. Operand 14517 states and 55175 transitions. [2022-03-01 18:43:16,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:43:16,620 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:43:16,620 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:43:16,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-03-01 18:43:16,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:43:16,847 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:43:16,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:43:16,848 INFO L85 PathProgramCache]: Analyzing trace with hash -812528685, now seen corresponding path program 67 times [2022-03-01 18:43:16,848 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:43:16,848 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218799484] [2022-03-01 18:43:16,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:43:16,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:43:16,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:43:16,913 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:43:16,914 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:43:16,914 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218799484] [2022-03-01 18:43:16,914 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218799484] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:43:16,914 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048245128] [2022-03-01 18:43:16,914 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:43:16,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:43:16,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:43:16,915 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:43:16,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-03-01 18:43:16,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:43:16,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:43:16,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:43:17,097 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:43:17,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:43:17,203 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:43:17,204 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048245128] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:43:17,204 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:43:17,204 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-03-01 18:43:17,204 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063260641] [2022-03-01 18:43:17,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:43:17,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 18:43:17,204 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:43:17,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 18:43:17,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-03-01 18:43:17,205 INFO L87 Difference]: Start difference. First operand 14517 states and 55175 transitions. Second operand has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:18,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:43:18,325 INFO L93 Difference]: Finished difference Result 18899 states and 68968 transitions. [2022-03-01 18:43:18,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-01 18:43:18,326 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:43:18,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:43:18,374 INFO L225 Difference]: With dead ends: 18899 [2022-03-01 18:43:18,375 INFO L226 Difference]: Without dead ends: 18863 [2022-03-01 18:43:18,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1648 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1026, Invalid=3944, Unknown=0, NotChecked=0, Total=4970 [2022-03-01 18:43:18,375 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 300 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 969 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 1048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:43:18,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 288 Invalid, 1048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 969 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 18:43:18,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18863 states. [2022-03-01 18:43:18,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18863 to 14621. [2022-03-01 18:43:18,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14621 states, 14620 states have (on average 3.7988372093023255) internal successors, (55539), 14620 states have internal predecessors, (55539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:18,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14621 states to 14621 states and 55539 transitions. [2022-03-01 18:43:18,714 INFO L78 Accepts]: Start accepts. Automaton has 14621 states and 55539 transitions. Word has length 30 [2022-03-01 18:43:18,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:43:18,714 INFO L470 AbstractCegarLoop]: Abstraction has 14621 states and 55539 transitions. [2022-03-01 18:43:18,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:18,715 INFO L276 IsEmpty]: Start isEmpty. Operand 14621 states and 55539 transitions. [2022-03-01 18:43:18,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:43:18,741 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:43:18,741 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:43:18,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-03-01 18:43:18,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:43:18,951 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:43:18,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:43:18,952 INFO L85 PathProgramCache]: Analyzing trace with hash 907843979, now seen corresponding path program 68 times [2022-03-01 18:43:18,952 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:43:18,952 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952367389] [2022-03-01 18:43:18,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:43:18,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:43:18,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:43:19,007 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:43:19,007 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:43:19,007 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952367389] [2022-03-01 18:43:19,007 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952367389] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:43:19,007 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082965055] [2022-03-01 18:43:19,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:43:19,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:43:19,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:43:19,025 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:43:19,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-03-01 18:43:19,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:43:19,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:43:19,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:43:19,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:43:19,269 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:43:19,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:43:19,386 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:43:19,387 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082965055] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:43:19,387 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:43:19,387 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2022-03-01 18:43:19,387 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062202493] [2022-03-01 18:43:19,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:43:19,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 18:43:19,387 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:43:19,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 18:43:19,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2022-03-01 18:43:19,390 INFO L87 Difference]: Start difference. First operand 14621 states and 55539 transitions. Second operand has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 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) [2022-03-01 18:43:22,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:43:22,595 INFO L93 Difference]: Finished difference Result 30029 states and 104622 transitions. [2022-03-01 18:43:22,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-03-01 18:43:22,596 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 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 30 [2022-03-01 18:43:22,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:43:22,679 INFO L225 Difference]: With dead ends: 30029 [2022-03-01 18:43:22,679 INFO L226 Difference]: Without dead ends: 30029 [2022-03-01 18:43:22,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18427 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=7199, Invalid=34621, Unknown=0, NotChecked=0, Total=41820 [2022-03-01 18:43:22,680 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 821 mSDsluCounter, 1115 mSDsCounter, 0 mSdLazyCounter, 2057 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 821 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 2208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 2057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 18:43:22,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [821 Valid, 633 Invalid, 2208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 2057 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-01 18:43:22,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30029 states. [2022-03-01 18:43:23,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30029 to 16135. [2022-03-01 18:43:23,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16135 states, 16134 states have (on average 3.829738440560307) internal successors, (61789), 16134 states have internal predecessors, (61789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:23,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16135 states to 16135 states and 61789 transitions. [2022-03-01 18:43:23,183 INFO L78 Accepts]: Start accepts. Automaton has 16135 states and 61789 transitions. Word has length 30 [2022-03-01 18:43:23,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:43:23,183 INFO L470 AbstractCegarLoop]: Abstraction has 16135 states and 61789 transitions. [2022-03-01 18:43:23,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 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) [2022-03-01 18:43:23,184 INFO L276 IsEmpty]: Start isEmpty. Operand 16135 states and 61789 transitions. [2022-03-01 18:43:23,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:43:23,213 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:43:23,213 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:43:23,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-03-01 18:43:23,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2022-03-01 18:43:23,427 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:43:23,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:43:23,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1495589301, now seen corresponding path program 69 times [2022-03-01 18:43:23,428 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:43:23,428 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685995236] [2022-03-01 18:43:23,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:43:23,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:43:23,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:43:23,477 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:43:23,477 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:43:23,477 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685995236] [2022-03-01 18:43:23,477 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685995236] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:43:23,478 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487191092] [2022-03-01 18:43:23,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:43:23,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:43:23,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:43:23,481 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:43:23,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-03-01 18:43:23,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 18:43:23,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:43:23,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-01 18:43:23,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:43:23,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-01 18:43:23,796 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-03-01 18:43:23,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-03-01 18:43:23,984 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:43:23,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:43:24,073 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-03-01 18:43:24,073 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 26 [2022-03-01 18:43:24,256 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:43:24,256 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487191092] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:43:24,256 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:43:24,256 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 31 [2022-03-01 18:43:24,256 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751167852] [2022-03-01 18:43:24,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:43:24,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 18:43:24,257 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:43:24,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 18:43:24,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=817, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:43:24,257 INFO L87 Difference]: Start difference. First operand 16135 states and 61789 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 31 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:28,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:43:28,366 INFO L93 Difference]: Finished difference Result 25546 states and 92153 transitions. [2022-03-01 18:43:28,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2022-03-01 18:43:28,366 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 31 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:43:28,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:43:28,445 INFO L225 Difference]: With dead ends: 25546 [2022-03-01 18:43:28,445 INFO L226 Difference]: Without dead ends: 25465 [2022-03-01 18:43:28,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 53 SyntacticMatches, 10 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12999 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3381, Invalid=28125, Unknown=0, NotChecked=0, Total=31506 [2022-03-01 18:43:28,446 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 886 mSDsluCounter, 1895 mSDsCounter, 0 mSdLazyCounter, 2085 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 886 SdHoareTripleChecker+Valid, 1177 SdHoareTripleChecker+Invalid, 3651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 2085 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1389 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:43:28,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [886 Valid, 1177 Invalid, 3651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 2085 Invalid, 0 Unknown, 1389 Unchecked, 0.7s Time] [2022-03-01 18:43:28,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25465 states. [2022-03-01 18:43:28,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25465 to 16044. [2022-03-01 18:43:28,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16044 states, 16043 states have (on average 3.840304182509506) internal successors, (61610), 16043 states have internal predecessors, (61610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:28,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16044 states to 16044 states and 61610 transitions. [2022-03-01 18:43:28,970 INFO L78 Accepts]: Start accepts. Automaton has 16044 states and 61610 transitions. Word has length 30 [2022-03-01 18:43:28,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:43:28,970 INFO L470 AbstractCegarLoop]: Abstraction has 16044 states and 61610 transitions. [2022-03-01 18:43:28,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 31 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:28,970 INFO L276 IsEmpty]: Start isEmpty. Operand 16044 states and 61610 transitions. [2022-03-01 18:43:28,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:43:28,999 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:43:28,999 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:43:29,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-03-01 18:43:29,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2022-03-01 18:43:29,216 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:43:29,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:43:29,216 INFO L85 PathProgramCache]: Analyzing trace with hash -759533131, now seen corresponding path program 70 times [2022-03-01 18:43:29,216 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:43:29,216 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199736731] [2022-03-01 18:43:29,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:43:29,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:43:29,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:43:29,252 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:43:29,252 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:43:29,252 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199736731] [2022-03-01 18:43:29,252 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199736731] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:43:29,252 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415883934] [2022-03-01 18:43:29,252 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:43:29,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:43:29,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:43:29,255 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:43:29,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-03-01 18:43:29,338 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:43:29,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:43:29,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:43:29,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:43:29,476 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:43:29,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:43:29,591 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:43:29,591 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415883934] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:43:29,591 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:43:29,591 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2022-03-01 18:43:29,591 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486536196] [2022-03-01 18:43:29,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:43:29,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 18:43:29,591 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:43:29,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 18:43:29,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-03-01 18:43:29,592 INFO L87 Difference]: Start difference. First operand 16044 states and 61610 transitions. Second operand has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 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) [2022-03-01 18:43:32,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:43:32,827 INFO L93 Difference]: Finished difference Result 39563 states and 138975 transitions. [2022-03-01 18:43:32,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 185 states. [2022-03-01 18:43:32,827 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 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 30 [2022-03-01 18:43:32,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:43:32,946 INFO L225 Difference]: With dead ends: 39563 [2022-03-01 18:43:32,946 INFO L226 Difference]: Without dead ends: 39563 [2022-03-01 18:43:32,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16013 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=7311, Invalid=28979, Unknown=0, NotChecked=0, Total=36290 [2022-03-01 18:43:32,950 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 827 mSDsluCounter, 1086 mSDsCounter, 0 mSdLazyCounter, 2162 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 827 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 2298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 2162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 18:43:32,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [827 Valid, 650 Invalid, 2298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 2162 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-01 18:43:32,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39563 states. [2022-03-01 18:43:33,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39563 to 16139. [2022-03-01 18:43:33,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16139 states, 16138 states have (on average 3.849485685958607) internal successors, (62123), 16138 states have internal predecessors, (62123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:33,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16139 states to 16139 states and 62123 transitions. [2022-03-01 18:43:33,721 INFO L78 Accepts]: Start accepts. Automaton has 16139 states and 62123 transitions. Word has length 30 [2022-03-01 18:43:33,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:43:33,721 INFO L470 AbstractCegarLoop]: Abstraction has 16139 states and 62123 transitions. [2022-03-01 18:43:33,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 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) [2022-03-01 18:43:33,721 INFO L276 IsEmpty]: Start isEmpty. Operand 16139 states and 62123 transitions. [2022-03-01 18:43:33,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:43:33,753 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:43:33,754 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:43:33,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-03-01 18:43:33,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:43:33,961 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:43:33,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:43:33,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1299570705, now seen corresponding path program 71 times [2022-03-01 18:43:33,961 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:43:33,961 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679324808] [2022-03-01 18:43:33,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:43:33,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:43:33,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:43:34,013 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:43:34,013 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:43:34,013 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679324808] [2022-03-01 18:43:34,013 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679324808] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:43:34,013 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133501722] [2022-03-01 18:43:34,013 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:43:34,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:43:34,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:43:34,016 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:43:34,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-03-01 18:43:34,070 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 18:43:34,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:43:34,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:43:34,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:43:34,177 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:43:34,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:43:34,276 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:43:34,277 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133501722] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:43:34,277 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:43:34,277 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2022-03-01 18:43:34,277 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110766023] [2022-03-01 18:43:34,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:43:34,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 18:43:34,277 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:43:34,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 18:43:34,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-03-01 18:43:34,277 INFO L87 Difference]: Start difference. First operand 16139 states and 62123 transitions. Second operand has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 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) [2022-03-01 18:43:37,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:43:37,833 INFO L93 Difference]: Finished difference Result 39410 states and 139201 transitions. [2022-03-01 18:43:37,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 222 states. [2022-03-01 18:43:37,833 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 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 30 [2022-03-01 18:43:37,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:43:37,955 INFO L225 Difference]: With dead ends: 39410 [2022-03-01 18:43:37,956 INFO L226 Difference]: Without dead ends: 39410 [2022-03-01 18:43:37,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22928 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=9003, Invalid=42299, Unknown=0, NotChecked=0, Total=51302 [2022-03-01 18:43:37,960 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 887 mSDsluCounter, 1099 mSDsCounter, 0 mSdLazyCounter, 2013 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 887 SdHoareTripleChecker+Valid, 656 SdHoareTripleChecker+Invalid, 2197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 2013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 18:43:37,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [887 Valid, 656 Invalid, 2197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 2013 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-01 18:43:38,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39410 states. [2022-03-01 18:43:38,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39410 to 15793. [2022-03-01 18:43:38,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15793 states, 15792 states have (on average 3.83314336372847) internal successors, (60533), 15792 states have internal predecessors, (60533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:38,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15793 states to 15793 states and 60533 transitions. [2022-03-01 18:43:38,687 INFO L78 Accepts]: Start accepts. Automaton has 15793 states and 60533 transitions. Word has length 30 [2022-03-01 18:43:38,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:43:38,687 INFO L470 AbstractCegarLoop]: Abstraction has 15793 states and 60533 transitions. [2022-03-01 18:43:38,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 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) [2022-03-01 18:43:38,687 INFO L276 IsEmpty]: Start isEmpty. Operand 15793 states and 60533 transitions. [2022-03-01 18:43:38,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:43:38,717 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:43:38,717 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:43:38,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-03-01 18:43:38,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:43:38,924 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:43:38,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:43:38,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1712540267, now seen corresponding path program 72 times [2022-03-01 18:43:38,925 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:43:38,925 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295204121] [2022-03-01 18:43:38,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:43:38,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:43:38,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:43:38,975 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:43:38,975 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:43:38,975 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295204121] [2022-03-01 18:43:38,975 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295204121] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:43:38,975 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918993713] [2022-03-01 18:43:38,975 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:43:38,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:43:38,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:43:38,976 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:43:38,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-03-01 18:43:39,028 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 18:43:39,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:43:39,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:43:39,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:43:39,134 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:43:39,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:43:39,289 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:43:39,289 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918993713] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:43:39,289 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:43:39,289 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-01 18:43:39,289 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207375360] [2022-03-01 18:43:39,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:43:39,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 18:43:39,290 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:43:39,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 18:43:39,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2022-03-01 18:43:39,290 INFO L87 Difference]: Start difference. First operand 15793 states and 60533 transitions. Second operand has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:41,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:43:41,577 INFO L93 Difference]: Finished difference Result 32331 states and 115471 transitions. [2022-03-01 18:43:41,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2022-03-01 18:43:41,577 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:43:41,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:43:41,688 INFO L225 Difference]: With dead ends: 32331 [2022-03-01 18:43:41,688 INFO L226 Difference]: Without dead ends: 32331 [2022-03-01 18:43:41,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10220 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=4495, Invalid=19375, Unknown=0, NotChecked=0, Total=23870 [2022-03-01 18:43:41,689 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 845 mSDsluCounter, 1056 mSDsCounter, 0 mSdLazyCounter, 1528 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 845 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 1692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 1528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:43:41,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [845 Valid, 649 Invalid, 1692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 1528 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 18:43:41,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32331 states. [2022-03-01 18:43:42,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32331 to 18359. [2022-03-01 18:43:42,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18359 states, 18358 states have (on average 3.830591567708901) internal successors, (70322), 18358 states have internal predecessors, (70322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:42,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18359 states to 18359 states and 70322 transitions. [2022-03-01 18:43:42,337 INFO L78 Accepts]: Start accepts. Automaton has 18359 states and 70322 transitions. Word has length 30 [2022-03-01 18:43:42,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:43:42,337 INFO L470 AbstractCegarLoop]: Abstraction has 18359 states and 70322 transitions. [2022-03-01 18:43:42,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:42,337 INFO L276 IsEmpty]: Start isEmpty. Operand 18359 states and 70322 transitions. [2022-03-01 18:43:42,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:43:42,375 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:43:42,375 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:43:42,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-03-01 18:43:42,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-03-01 18:43:42,591 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:43:42,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:43:42,591 INFO L85 PathProgramCache]: Analyzing trace with hash 657162873, now seen corresponding path program 73 times [2022-03-01 18:43:42,591 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:43:42,591 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726309610] [2022-03-01 18:43:42,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:43:42,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:43:42,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:43:42,642 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:43:42,642 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:43:42,642 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726309610] [2022-03-01 18:43:42,642 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726309610] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:43:42,642 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797582639] [2022-03-01 18:43:42,642 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:43:42,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:43:42,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:43:42,643 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:43:42,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-03-01 18:43:42,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:43:42,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:43:42,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:43:42,855 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:43:42,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:43:42,986 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:43:42,986 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797582639] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:43:42,986 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:43:42,986 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-01 18:43:42,986 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447316181] [2022-03-01 18:43:42,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:43:42,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 18:43:42,987 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:43:42,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 18:43:42,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2022-03-01 18:43:42,987 INFO L87 Difference]: Start difference. First operand 18359 states and 70322 transitions. Second operand has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:45,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:43:45,203 INFO L93 Difference]: Finished difference Result 33551 states and 121071 transitions. [2022-03-01 18:43:45,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2022-03-01 18:43:45,203 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:43:45,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:43:45,304 INFO L225 Difference]: With dead ends: 33551 [2022-03-01 18:43:45,304 INFO L226 Difference]: Without dead ends: 33539 [2022-03-01 18:43:45,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9441 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=4177, Invalid=18473, Unknown=0, NotChecked=0, Total=22650 [2022-03-01 18:43:45,307 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 851 mSDsluCounter, 766 mSDsCounter, 0 mSdLazyCounter, 1493 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 851 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 1669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 1493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:43:45,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [851 Valid, 523 Invalid, 1669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 1493 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 18:43:45,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33539 states. [2022-03-01 18:43:46,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33539 to 17993. [2022-03-01 18:43:46,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17993 states, 17992 states have (on average 3.842207647843486) internal successors, (69129), 17992 states have internal predecessors, (69129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:46,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17993 states to 17993 states and 69129 transitions. [2022-03-01 18:43:46,140 INFO L78 Accepts]: Start accepts. Automaton has 17993 states and 69129 transitions. Word has length 30 [2022-03-01 18:43:46,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:43:46,140 INFO L470 AbstractCegarLoop]: Abstraction has 17993 states and 69129 transitions. [2022-03-01 18:43:46,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:46,140 INFO L276 IsEmpty]: Start isEmpty. Operand 17993 states and 69129 transitions. [2022-03-01 18:43:46,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:43:46,178 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:43:46,178 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:43:46,194 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-03-01 18:43:46,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:43:46,382 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:43:46,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:43:46,382 INFO L85 PathProgramCache]: Analyzing trace with hash 2140297811, now seen corresponding path program 74 times [2022-03-01 18:43:46,382 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:43:46,382 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057190584] [2022-03-01 18:43:46,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:43:46,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:43:46,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:43:46,431 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:43:46,432 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:43:46,432 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057190584] [2022-03-01 18:43:46,432 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057190584] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:43:46,432 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940199809] [2022-03-01 18:43:46,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:43:46,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:43:46,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:43:46,433 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:43:46,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-03-01 18:43:46,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:43:46,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:43:46,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:43:46,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:43:46,629 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:43:46,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:43:46,748 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:43:46,748 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940199809] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:43:46,748 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:43:46,748 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-01 18:43:46,748 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063696026] [2022-03-01 18:43:46,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:43:46,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:43:46,748 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:43:46,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:43:46,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:43:46,749 INFO L87 Difference]: Start difference. First operand 17993 states and 69129 transitions. Second operand has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:48,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:43:48,836 INFO L93 Difference]: Finished difference Result 33062 states and 119951 transitions. [2022-03-01 18:43:48,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-03-01 18:43:48,837 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:43:48,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:43:48,933 INFO L225 Difference]: With dead ends: 33062 [2022-03-01 18:43:48,933 INFO L226 Difference]: Without dead ends: 33026 [2022-03-01 18:43:48,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6665 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3024, Invalid=13746, Unknown=0, NotChecked=0, Total=16770 [2022-03-01 18:43:48,935 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 660 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 1337 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 660 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 1488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 1337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:43:48,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [660 Valid, 434 Invalid, 1488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 1337 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 18:43:48,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33026 states. [2022-03-01 18:43:49,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33026 to 17977. [2022-03-01 18:43:49,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17977 states, 17976 states have (on average 3.8412883845126835) internal successors, (69051), 17976 states have internal predecessors, (69051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:49,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17977 states to 17977 states and 69051 transitions. [2022-03-01 18:43:49,624 INFO L78 Accepts]: Start accepts. Automaton has 17977 states and 69051 transitions. Word has length 30 [2022-03-01 18:43:49,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:43:49,624 INFO L470 AbstractCegarLoop]: Abstraction has 17977 states and 69051 transitions. [2022-03-01 18:43:49,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:49,624 INFO L276 IsEmpty]: Start isEmpty. Operand 17977 states and 69051 transitions. [2022-03-01 18:43:49,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:43:49,654 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:43:49,655 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:43:49,670 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-03-01 18:43:49,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:43:49,870 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:43:49,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:43:49,871 INFO L85 PathProgramCache]: Analyzing trace with hash -608597673, now seen corresponding path program 75 times [2022-03-01 18:43:49,871 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:43:49,871 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739708967] [2022-03-01 18:43:49,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:43:49,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:43:49,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:43:49,902 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:43:49,902 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:43:49,902 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739708967] [2022-03-01 18:43:49,902 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739708967] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:43:49,902 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834376475] [2022-03-01 18:43:49,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:43:49,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:43:49,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:43:49,904 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:43:49,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-03-01 18:43:49,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 18:43:49,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:43:49,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:43:49,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:43:50,021 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:43:50,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:43:50,086 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:43:50,086 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834376475] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:43:50,086 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:43:50,086 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-03-01 18:43:50,086 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729380904] [2022-03-01 18:43:50,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:43:50,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 18:43:50,086 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:43:50,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 18:43:50,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2022-03-01 18:43:50,087 INFO L87 Difference]: Start difference. First operand 17977 states and 69051 transitions. Second operand has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:51,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:43:51,609 INFO L93 Difference]: Finished difference Result 32074 states and 117370 transitions. [2022-03-01 18:43:51,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-03-01 18:43:51,610 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:43:51,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:43:51,711 INFO L225 Difference]: With dead ends: 32074 [2022-03-01 18:43:51,711 INFO L226 Difference]: Without dead ends: 32038 [2022-03-01 18:43:51,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4230 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2126, Invalid=9004, Unknown=0, NotChecked=0, Total=11130 [2022-03-01 18:43:51,713 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 548 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 1073 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 548 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 1187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:43:51,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [548 Valid, 323 Invalid, 1187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1073 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 18:43:51,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32038 states. [2022-03-01 18:43:52,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32038 to 17959. [2022-03-01 18:43:52,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17959 states, 17958 states have (on average 3.8416304710992315) internal successors, (68988), 17958 states have internal predecessors, (68988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:52,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17959 states to 17959 states and 68988 transitions. [2022-03-01 18:43:52,462 INFO L78 Accepts]: Start accepts. Automaton has 17959 states and 68988 transitions. Word has length 30 [2022-03-01 18:43:52,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:43:52,462 INFO L470 AbstractCegarLoop]: Abstraction has 17959 states and 68988 transitions. [2022-03-01 18:43:52,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:52,463 INFO L276 IsEmpty]: Start isEmpty. Operand 17959 states and 68988 transitions. [2022-03-01 18:43:52,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:43:52,497 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:43:52,497 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:43:52,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-03-01 18:43:52,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-03-01 18:43:52,698 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:43:52,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:43:52,698 INFO L85 PathProgramCache]: Analyzing trace with hash 109228903, now seen corresponding path program 76 times [2022-03-01 18:43:52,699 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:43:52,699 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753198240] [2022-03-01 18:43:52,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:43:52,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:43:52,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:43:52,738 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:43:52,738 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:43:52,738 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753198240] [2022-03-01 18:43:52,738 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753198240] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:43:52,738 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295631541] [2022-03-01 18:43:52,738 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:43:52,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:43:52,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:43:52,740 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:43:52,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-03-01 18:43:52,800 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:43:52,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:43:52,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:43:52,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:43:52,902 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:43:52,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:43:53,011 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:43:53,011 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295631541] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:43:53,011 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:43:53,011 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 22 [2022-03-01 18:43:53,011 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864999634] [2022-03-01 18:43:53,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:43:53,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 18:43:53,012 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:43:53,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 18:43:53,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2022-03-01 18:43:53,012 INFO L87 Difference]: Start difference. First operand 17959 states and 68988 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:55,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:43:55,134 INFO L93 Difference]: Finished difference Result 37595 states and 135163 transitions. [2022-03-01 18:43:55,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-03-01 18:43:55,134 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:43:55,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:43:55,247 INFO L225 Difference]: With dead ends: 37595 [2022-03-01 18:43:55,247 INFO L226 Difference]: Without dead ends: 37595 [2022-03-01 18:43:55,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7508 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3980, Invalid=13312, Unknown=0, NotChecked=0, Total=17292 [2022-03-01 18:43:55,248 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 977 mSDsluCounter, 797 mSDsCounter, 0 mSdLazyCounter, 1210 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 977 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 1366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 1210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:43:55,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [977 Valid, 479 Invalid, 1366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 1210 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 18:43:55,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37595 states. [2022-03-01 18:43:55,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37595 to 21412. [2022-03-01 18:43:56,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21412 states, 21411 states have (on average 3.908224744290318) internal successors, (83679), 21411 states have internal predecessors, (83679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:56,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21412 states to 21412 states and 83679 transitions. [2022-03-01 18:43:56,086 INFO L78 Accepts]: Start accepts. Automaton has 21412 states and 83679 transitions. Word has length 30 [2022-03-01 18:43:56,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:43:56,086 INFO L470 AbstractCegarLoop]: Abstraction has 21412 states and 83679 transitions. [2022-03-01 18:43:56,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:56,087 INFO L276 IsEmpty]: Start isEmpty. Operand 21412 states and 83679 transitions. [2022-03-01 18:43:56,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:43:56,129 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:43:56,129 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:43:56,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-03-01 18:43:56,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-03-01 18:43:56,330 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:43:56,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:43:56,330 INFO L85 PathProgramCache]: Analyzing trace with hash -946148491, now seen corresponding path program 77 times [2022-03-01 18:43:56,330 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:43:56,330 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479543032] [2022-03-01 18:43:56,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:43:56,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:43:56,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:43:56,377 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:43:56,377 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:43:56,377 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479543032] [2022-03-01 18:43:56,377 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479543032] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:43:56,377 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709936289] [2022-03-01 18:43:56,377 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:43:56,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:43:56,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:43:56,379 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:43:56,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-03-01 18:43:56,438 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 18:43:56,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:43:56,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:43:56,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:43:56,540 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:43:56,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:43:56,667 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:43:56,668 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709936289] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:43:56,668 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:43:56,668 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 22 [2022-03-01 18:43:56,668 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904712825] [2022-03-01 18:43:56,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:43:56,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 18:43:56,668 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:43:56,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 18:43:56,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2022-03-01 18:43:56,668 INFO L87 Difference]: Start difference. First operand 21412 states and 83679 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:59,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:43:59,035 INFO L93 Difference]: Finished difference Result 39919 states and 144205 transitions. [2022-03-01 18:43:59,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2022-03-01 18:43:59,036 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:43:59,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:43:59,163 INFO L225 Difference]: With dead ends: 39919 [2022-03-01 18:43:59,163 INFO L226 Difference]: Without dead ends: 39899 [2022-03-01 18:43:59,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11986 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=5282, Invalid=22108, Unknown=0, NotChecked=0, Total=27390 [2022-03-01 18:43:59,165 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1105 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 1241 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1105 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 1520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 1241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:43:59,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1105 Valid, 396 Invalid, 1520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 1241 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 18:43:59,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39899 states. [2022-03-01 18:44:00,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39899 to 21371. [2022-03-01 18:44:00,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21371 states, 21370 states have (on average 3.907440336920917) internal successors, (83502), 21370 states have internal predecessors, (83502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:44:00,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21371 states to 21371 states and 83502 transitions. [2022-03-01 18:44:00,136 INFO L78 Accepts]: Start accepts. Automaton has 21371 states and 83502 transitions. Word has length 30 [2022-03-01 18:44:00,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:44:00,136 INFO L470 AbstractCegarLoop]: Abstraction has 21371 states and 83502 transitions. [2022-03-01 18:44:00,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:44:00,136 INFO L276 IsEmpty]: Start isEmpty. Operand 21371 states and 83502 transitions. [2022-03-01 18:44:00,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:44:00,182 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:44:00,182 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:44:00,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2022-03-01 18:44:00,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:44:00,397 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:44:00,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:44:00,398 INFO L85 PathProgramCache]: Analyzing trace with hash -94905237, now seen corresponding path program 78 times [2022-03-01 18:44:00,398 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:44:00,398 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284241731] [2022-03-01 18:44:00,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:44:00,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:44:00,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:44:00,439 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:44:00,439 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:44:00,439 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284241731] [2022-03-01 18:44:00,439 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284241731] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:44:00,439 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165472045] [2022-03-01 18:44:00,439 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:44:00,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:44:00,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:44:00,440 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:44:00,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-03-01 18:44:00,527 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 18:44:00,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:44:00,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:44:00,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:44:00,625 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:44:00,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:44:00,727 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:44:00,728 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165472045] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:44:00,728 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:44:00,728 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 22 [2022-03-01 18:44:00,728 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867256379] [2022-03-01 18:44:00,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:44:00,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 18:44:00,728 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:44:00,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 18:44:00,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2022-03-01 18:44:00,728 INFO L87 Difference]: Start difference. First operand 21371 states and 83502 transitions. Second operand has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:44:03,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:44:03,377 INFO L93 Difference]: Finished difference Result 41385 states and 149926 transitions. [2022-03-01 18:44:03,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2022-03-01 18:44:03,378 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:44:03,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:44:03,508 INFO L225 Difference]: With dead ends: 41385 [2022-03-01 18:44:03,508 INFO L226 Difference]: Without dead ends: 41385 [2022-03-01 18:44:03,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12490 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=6088, Invalid=19352, Unknown=0, NotChecked=0, Total=25440 [2022-03-01 18:44:03,510 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 1054 mSDsluCounter, 788 mSDsCounter, 0 mSdLazyCounter, 1234 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1054 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 1402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 1234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:44:03,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1054 Valid, 435 Invalid, 1402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 1234 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 18:44:03,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41385 states. [2022-03-01 18:44:04,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41385 to 21369. [2022-03-01 18:44:04,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21369 states, 21368 states have (on average 3.9074784724822162) internal successors, (83495), 21368 states have internal predecessors, (83495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:44:04,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21369 states to 21369 states and 83495 transitions. [2022-03-01 18:44:04,294 INFO L78 Accepts]: Start accepts. Automaton has 21369 states and 83495 transitions. Word has length 30 [2022-03-01 18:44:04,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:44:04,295 INFO L470 AbstractCegarLoop]: Abstraction has 21369 states and 83495 transitions. [2022-03-01 18:44:04,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:44:04,295 INFO L276 IsEmpty]: Start isEmpty. Operand 21369 states and 83495 transitions. [2022-03-01 18:44:04,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:44:04,336 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:44:04,336 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:44:04,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2022-03-01 18:44:04,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:44:04,543 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:44:04,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:44:04,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1102478425, now seen corresponding path program 79 times [2022-03-01 18:44:04,543 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:44:04,543 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030793447] [2022-03-01 18:44:04,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:44:04,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:44:04,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:44:04,604 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:44:04,604 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:44:04,604 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030793447] [2022-03-01 18:44:04,604 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030793447] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:44:04,604 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980242674] [2022-03-01 18:44:04,604 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:44:04,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:44:04,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:44:04,605 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:44:04,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-03-01 18:44:04,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:44:04,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:44:04,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:44:04,734 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:44:04,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:44:04,816 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:44:04,817 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980242674] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:44:04,817 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:44:04,817 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 22 [2022-03-01 18:44:04,817 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774371455] [2022-03-01 18:44:04,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:44:04,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 18:44:04,817 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:44:04,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 18:44:04,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2022-03-01 18:44:04,817 INFO L87 Difference]: Start difference. First operand 21369 states and 83495 transitions. Second operand has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 22 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:44:07,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:44:07,858 INFO L93 Difference]: Finished difference Result 49381 states and 176111 transitions. [2022-03-01 18:44:07,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2022-03-01 18:44:07,858 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 22 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:44:07,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:44:08,133 INFO L225 Difference]: With dead ends: 49381 [2022-03-01 18:44:08,133 INFO L226 Difference]: Without dead ends: 49381 [2022-03-01 18:44:08,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17447 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=7299, Invalid=29757, Unknown=0, NotChecked=0, Total=37056 [2022-03-01 18:44:08,135 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 788 mSDsluCounter, 928 mSDsCounter, 0 mSdLazyCounter, 1714 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 788 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 1860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 1714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 18:44:08,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [788 Valid, 536 Invalid, 1860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 1714 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-01 18:44:08,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49381 states. [2022-03-01 18:44:09,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49381 to 21351. [2022-03-01 18:44:09,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21351 states, 21350 states have (on average 3.906838407494145) internal successors, (83411), 21350 states have internal predecessors, (83411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:44:09,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21351 states to 21351 states and 83411 transitions. [2022-03-01 18:44:09,253 INFO L78 Accepts]: Start accepts. Automaton has 21351 states and 83411 transitions. Word has length 30 [2022-03-01 18:44:09,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:44:09,253 INFO L470 AbstractCegarLoop]: Abstraction has 21351 states and 83411 transitions. [2022-03-01 18:44:09,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 22 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:44:09,253 INFO L276 IsEmpty]: Start isEmpty. Operand 21351 states and 83411 transitions. [2022-03-01 18:44:09,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:44:09,401 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:44:09,401 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:44:09,423 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-03-01 18:44:09,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2022-03-01 18:44:09,611 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:44:09,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:44:09,611 INFO L85 PathProgramCache]: Analyzing trace with hash 2072491833, now seen corresponding path program 80 times [2022-03-01 18:44:09,612 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:44:09,612 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588930279] [2022-03-01 18:44:09,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:44:09,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:44:09,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:44:09,670 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:44:09,670 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:44:09,670 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588930279] [2022-03-01 18:44:09,670 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588930279] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:44:09,671 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018198518] [2022-03-01 18:44:09,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:44:09,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:44:09,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:44:09,672 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:44:09,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-03-01 18:44:09,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:44:09,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:44:09,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:44:09,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:44:09,833 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:44:09,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:44:09,953 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:44:09,954 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018198518] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:44:09,954 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:44:09,954 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 20 [2022-03-01 18:44:09,954 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215729844] [2022-03-01 18:44:09,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:44:09,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 18:44:09,954 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:44:09,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 18:44:09,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:44:09,954 INFO L87 Difference]: Start difference. First operand 21351 states and 83411 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 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) [2022-03-01 18:44:11,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:44:11,752 INFO L93 Difference]: Finished difference Result 44753 states and 161002 transitions. [2022-03-01 18:44:11,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-03-01 18:44:11,752 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 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 30 [2022-03-01 18:44:11,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:44:11,890 INFO L225 Difference]: With dead ends: 44753 [2022-03-01 18:44:11,891 INFO L226 Difference]: Without dead ends: 44741 [2022-03-01 18:44:11,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6552 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=3379, Invalid=12371, Unknown=0, NotChecked=0, Total=15750 [2022-03-01 18:44:11,891 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 903 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 1123 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 903 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 1329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 1123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:44:11,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [903 Valid, 361 Invalid, 1329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 1123 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 18:44:11,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44741 states. [2022-03-01 18:44:12,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44741 to 21357. [2022-03-01 18:44:12,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21357 states, 21356 states have (on average 3.90672410563776) internal successors, (83432), 21356 states have internal predecessors, (83432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:44:12,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21357 states to 21357 states and 83432 transitions. [2022-03-01 18:44:12,804 INFO L78 Accepts]: Start accepts. Automaton has 21357 states and 83432 transitions. Word has length 30 [2022-03-01 18:44:12,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:44:12,804 INFO L470 AbstractCegarLoop]: Abstraction has 21357 states and 83432 transitions. [2022-03-01 18:44:12,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 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) [2022-03-01 18:44:12,805 INFO L276 IsEmpty]: Start isEmpty. Operand 21357 states and 83432 transitions. [2022-03-01 18:44:12,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:44:12,841 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:44:12,841 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:44:12,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2022-03-01 18:44:13,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2022-03-01 18:44:13,051 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:44:13,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:44:13,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1951965771, now seen corresponding path program 81 times [2022-03-01 18:44:13,051 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:44:13,051 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814414237] [2022-03-01 18:44:13,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:44:13,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:44:13,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:44:13,087 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:44:13,088 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:44:13,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814414237] [2022-03-01 18:44:13,088 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814414237] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:44:13,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710453298] [2022-03-01 18:44:13,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:44:13,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:44:13,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:44:13,089 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:44:13,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-03-01 18:44:13,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:44:13,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:44:13,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 18:44:13,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:44:13,269 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:44:13,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:44:13,368 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-03-01 18:44:13,492 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:44:13,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:44:13,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:44:13,683 INFO L353 Elim1Store]: treesize reduction 10, result has 47.4 percent of original size [2022-03-01 18:44:13,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 22 [2022-03-01 18:44:13,865 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:44:13,866 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710453298] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:44:13,866 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:44:13,866 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 14] total 33 [2022-03-01 18:44:13,866 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181341425] [2022-03-01 18:44:13,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:44:13,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 18:44:13,866 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:44:13,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 18:44:13,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=900, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 18:44:13,867 INFO L87 Difference]: Start difference. First operand 21357 states and 83432 transitions. Second operand has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 33 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:44:23,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:44:23,150 INFO L93 Difference]: Finished difference Result 55083 states and 197153 transitions. [2022-03-01 18:44:23,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 284 states. [2022-03-01 18:44:23,150 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 33 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:44:23,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:44:23,331 INFO L225 Difference]: With dead ends: 55083 [2022-03-01 18:44:23,331 INFO L226 Difference]: Without dead ends: 55048 [2022-03-01 18:44:23,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 58 SyntacticMatches, 18 SemanticMatches, 304 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42724 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=14090, Invalid=79240, Unknown=0, NotChecked=0, Total=93330 [2022-03-01 18:44:23,334 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 1220 mSDsluCounter, 2203 mSDsCounter, 0 mSdLazyCounter, 3518 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1220 SdHoareTripleChecker+Valid, 1358 SdHoareTripleChecker+Invalid, 4132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 3518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 347 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:44:23,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1220 Valid, 1358 Invalid, 4132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 3518 Invalid, 0 Unknown, 347 Unchecked, 1.4s Time] [2022-03-01 18:44:23,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55048 states. [2022-03-01 18:44:24,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55048 to 23406. [2022-03-01 18:44:24,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23406 states, 23405 states have (on average 3.9390301217688526) internal successors, (92193), 23405 states have internal predecessors, (92193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:44:24,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23406 states to 23406 states and 92193 transitions. [2022-03-01 18:44:24,516 INFO L78 Accepts]: Start accepts. Automaton has 23406 states and 92193 transitions. Word has length 30 [2022-03-01 18:44:24,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:44:24,516 INFO L470 AbstractCegarLoop]: Abstraction has 23406 states and 92193 transitions. [2022-03-01 18:44:24,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 33 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:44:24,516 INFO L276 IsEmpty]: Start isEmpty. Operand 23406 states and 92193 transitions. [2022-03-01 18:44:24,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:44:24,564 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:44:24,564 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:44:24,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-03-01 18:44:24,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:44:24,775 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:44:24,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:44:24,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1366937585, now seen corresponding path program 82 times [2022-03-01 18:44:24,775 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:44:24,775 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032237248] [2022-03-01 18:44:24,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:44:24,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:44:24,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:44:24,815 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:44:24,816 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:44:24,816 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032237248] [2022-03-01 18:44:24,816 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032237248] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:44:24,816 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654475103] [2022-03-01 18:44:24,816 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:44:24,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:44:24,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:44:24,817 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:44:24,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-03-01 18:44:24,910 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:44:24,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:44:24,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:44:24,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:44:25,042 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:44:25,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:44:25,164 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:44:25,164 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654475103] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:44:25,164 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:44:25,165 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 18 [2022-03-01 18:44:25,165 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319464291] [2022-03-01 18:44:25,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:44:25,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 18:44:25,165 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:44:25,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 18:44:25,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2022-03-01 18:44:25,165 INFO L87 Difference]: Start difference. First operand 23406 states and 92193 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:44:26,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:44:26,848 INFO L93 Difference]: Finished difference Result 50079 states and 185865 transitions. [2022-03-01 18:44:26,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-03-01 18:44:26,848 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:44:26,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:44:27,020 INFO L225 Difference]: With dead ends: 50079 [2022-03-01 18:44:27,020 INFO L226 Difference]: Without dead ends: 50043 [2022-03-01 18:44:27,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3255 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1775, Invalid=6781, Unknown=0, NotChecked=0, Total=8556 [2022-03-01 18:44:27,021 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 582 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 923 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 582 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 1022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:44:27,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [582 Valid, 323 Invalid, 1022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 923 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 18:44:27,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50043 states. [2022-03-01 18:44:28,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50043 to 24787. [2022-03-01 18:44:28,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24787 states, 24786 states have (on average 3.956507705963044) internal successors, (98066), 24786 states have internal predecessors, (98066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:44:28,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24787 states to 24787 states and 98066 transitions. [2022-03-01 18:44:28,187 INFO L78 Accepts]: Start accepts. Automaton has 24787 states and 98066 transitions. Word has length 30 [2022-03-01 18:44:28,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:44:28,187 INFO L470 AbstractCegarLoop]: Abstraction has 24787 states and 98066 transitions. [2022-03-01 18:44:28,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:44:28,187 INFO L276 IsEmpty]: Start isEmpty. Operand 24787 states and 98066 transitions. [2022-03-01 18:44:28,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:44:28,233 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:44:28,233 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:44:28,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2022-03-01 18:44:28,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:44:28,443 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:44:28,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:44:28,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1436024979, now seen corresponding path program 83 times [2022-03-01 18:44:28,443 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:44:28,443 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765401015] [2022-03-01 18:44:28,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:44:28,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:44:28,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:44:28,506 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:44:28,506 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:44:28,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765401015] [2022-03-01 18:44:28,507 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765401015] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:44:28,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83174394] [2022-03-01 18:44:28,507 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:44:28,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:44:28,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:44:28,508 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:44:28,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-03-01 18:44:28,565 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:44:28,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:44:28,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:44:28,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:44:28,663 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:44:28,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:44:28,763 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:44:28,764 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83174394] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:44:28,764 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:44:28,764 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 18 [2022-03-01 18:44:28,764 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467267741] [2022-03-01 18:44:28,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:44:28,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 18:44:28,764 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:44:28,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 18:44:28,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2022-03-01 18:44:28,764 INFO L87 Difference]: Start difference. First operand 24787 states and 98066 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:44:30,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:44:30,505 INFO L93 Difference]: Finished difference Result 51358 states and 189473 transitions. [2022-03-01 18:44:30,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-03-01 18:44:30,505 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:44:30,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:44:30,713 INFO L225 Difference]: With dead ends: 51358 [2022-03-01 18:44:30,714 INFO L226 Difference]: Without dead ends: 51346 [2022-03-01 18:44:30,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4015 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2125, Invalid=7975, Unknown=0, NotChecked=0, Total=10100 [2022-03-01 18:44:30,714 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 638 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 938 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 638 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 1056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:44:30,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [638 Valid, 328 Invalid, 1056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 938 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 18:44:30,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51346 states. [2022-03-01 18:44:31,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51346 to 24934. [2022-03-01 18:44:31,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24934 states, 24933 states have (on average 3.953114346448482) internal successors, (98563), 24933 states have internal predecessors, (98563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:44:32,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24934 states to 24934 states and 98563 transitions. [2022-03-01 18:44:32,061 INFO L78 Accepts]: Start accepts. Automaton has 24934 states and 98563 transitions. Word has length 30 [2022-03-01 18:44:32,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:44:32,061 INFO L470 AbstractCegarLoop]: Abstraction has 24934 states and 98563 transitions. [2022-03-01 18:44:32,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:44:32,061 INFO L276 IsEmpty]: Start isEmpty. Operand 24934 states and 98563 transitions. [2022-03-01 18:44:32,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:44:32,108 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:44:32,108 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:44:32,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-03-01 18:44:32,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2022-03-01 18:44:32,324 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:44:32,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:44:32,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1588868973, now seen corresponding path program 84 times [2022-03-01 18:44:32,324 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:44:32,324 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560419697] [2022-03-01 18:44:32,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:44:32,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:44:32,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:44:32,406 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:44:32,406 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:44:32,406 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560419697] [2022-03-01 18:44:32,407 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560419697] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:44:32,407 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873238005] [2022-03-01 18:44:32,407 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:44:32,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:44:32,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:44:32,408 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:44:32,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-03-01 18:44:32,466 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:44:32,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:44:32,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:44:32,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:44:32,568 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:44:32,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:44:32,670 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:44:32,670 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873238005] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:44:32,670 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:44:32,670 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 18 [2022-03-01 18:44:32,670 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833289571] [2022-03-01 18:44:32,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:44:32,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 18:44:32,670 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:44:32,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 18:44:32,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2022-03-01 18:44:32,671 INFO L87 Difference]: Start difference. First operand 24934 states and 98563 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:44:34,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:44:34,824 INFO L93 Difference]: Finished difference Result 52042 states and 191452 transitions. [2022-03-01 18:44:34,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-03-01 18:44:34,825 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:44:34,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:44:35,085 INFO L225 Difference]: With dead ends: 52042 [2022-03-01 18:44:35,085 INFO L226 Difference]: Without dead ends: 52042 [2022-03-01 18:44:35,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5759 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2804, Invalid=10536, Unknown=0, NotChecked=0, Total=13340 [2022-03-01 18:44:35,086 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 696 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 696 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 1078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:44:35,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [696 Valid, 373 Invalid, 1078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 956 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 18:44:35,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52042 states. [2022-03-01 18:44:36,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52042 to 24804. [2022-03-01 18:44:36,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24804 states, 24803 states have (on average 3.9582308591702615) internal successors, (98176), 24803 states have internal predecessors, (98176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:44:36,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24804 states to 24804 states and 98176 transitions. [2022-03-01 18:44:36,490 INFO L78 Accepts]: Start accepts. Automaton has 24804 states and 98176 transitions. Word has length 30 [2022-03-01 18:44:36,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:44:36,490 INFO L470 AbstractCegarLoop]: Abstraction has 24804 states and 98176 transitions. [2022-03-01 18:44:36,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:44:36,490 INFO L276 IsEmpty]: Start isEmpty. Operand 24804 states and 98176 transitions. [2022-03-01 18:44:36,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:44:36,542 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:44:36,542 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:44:36,559 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-03-01 18:44:36,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2022-03-01 18:44:36,756 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:44:36,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:44:36,756 INFO L85 PathProgramCache]: Analyzing trace with hash -319949037, now seen corresponding path program 85 times [2022-03-01 18:44:36,756 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:44:36,756 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883766144] [2022-03-01 18:44:36,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:44:36,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:44:36,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:44:36,796 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:44:36,797 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:44:36,797 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883766144] [2022-03-01 18:44:36,797 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883766144] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:44:36,797 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127268840] [2022-03-01 18:44:36,797 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:44:36,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:44:36,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:44:36,798 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:44:36,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-03-01 18:44:36,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:44:36,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:44:36,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:44:36,938 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:44:36,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:44:37,015 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:44:37,015 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127268840] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:44:37,015 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:44:37,016 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-03-01 18:44:37,016 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703006544] [2022-03-01 18:44:37,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:44:37,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 18:44:37,016 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:44:37,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 18:44:37,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-03-01 18:44:37,016 INFO L87 Difference]: Start difference. First operand 24804 states and 98176 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 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) [2022-03-01 18:44:38,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:44:38,152 INFO L93 Difference]: Finished difference Result 43209 states and 161885 transitions. [2022-03-01 18:44:38,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-01 18:44:38,152 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 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 30 [2022-03-01 18:44:38,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:44:38,314 INFO L225 Difference]: With dead ends: 43209 [2022-03-01 18:44:38,314 INFO L226 Difference]: Without dead ends: 43173 [2022-03-01 18:44:38,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2108 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1236, Invalid=4770, Unknown=0, NotChecked=0, Total=6006 [2022-03-01 18:44:38,315 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 626 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 626 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:44:38,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [626 Valid, 264 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:44:38,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43173 states. [2022-03-01 18:44:39,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43173 to 24838. [2022-03-01 18:44:39,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24838 states, 24837 states have (on average 3.957523050287877) internal successors, (98293), 24837 states have internal predecessors, (98293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:44:39,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24838 states to 24838 states and 98293 transitions. [2022-03-01 18:44:39,449 INFO L78 Accepts]: Start accepts. Automaton has 24838 states and 98293 transitions. Word has length 30 [2022-03-01 18:44:39,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:44:39,449 INFO L470 AbstractCegarLoop]: Abstraction has 24838 states and 98293 transitions. [2022-03-01 18:44:39,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 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) [2022-03-01 18:44:39,449 INFO L276 IsEmpty]: Start isEmpty. Operand 24838 states and 98293 transitions. [2022-03-01 18:44:39,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:44:39,497 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:44:39,497 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:44:39,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2022-03-01 18:44:39,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2022-03-01 18:44:39,712 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:44:39,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:44:39,713 INFO L85 PathProgramCache]: Analyzing trace with hash 382580375, now seen corresponding path program 86 times [2022-03-01 18:44:39,713 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:44:39,713 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777811757] [2022-03-01 18:44:39,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:44:39,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:44:39,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:44:39,762 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:44:39,762 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:44:39,762 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777811757] [2022-03-01 18:44:39,762 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777811757] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:44:39,762 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477791273] [2022-03-01 18:44:39,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:44:39,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:44:39,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:44:39,764 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:44:39,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-03-01 18:44:39,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:44:39,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:44:39,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:44:39,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:44:39,914 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:44:39,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:44:40,011 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:44:40,011 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477791273] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:44:40,011 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:44:40,011 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-03-01 18:44:40,012 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706436400] [2022-03-01 18:44:40,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:44:40,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 18:44:40,012 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:44:40,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 18:44:40,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2022-03-01 18:44:40,012 INFO L87 Difference]: Start difference. First operand 24838 states and 98293 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 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) [2022-03-01 18:44:41,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:44:41,010 INFO L93 Difference]: Finished difference Result 42696 states and 160691 transitions. [2022-03-01 18:44:41,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-01 18:44:41,011 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 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 30 [2022-03-01 18:44:41,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:44:41,157 INFO L225 Difference]: With dead ends: 42696 [2022-03-01 18:44:41,157 INFO L226 Difference]: Without dead ends: 42672 [2022-03-01 18:44:41,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1626 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1031, Invalid=3661, Unknown=0, NotChecked=0, Total=4692 [2022-03-01 18:44:41,158 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 490 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:44:41,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [490 Valid, 248 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 667 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:44:41,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42672 states. [2022-03-01 18:44:42,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42672 to 25046. [2022-03-01 18:44:42,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25046 states, 25045 states have (on average 3.9503693351966462) internal successors, (98937), 25045 states have internal predecessors, (98937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:44:42,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25046 states to 25046 states and 98937 transitions. [2022-03-01 18:44:42,294 INFO L78 Accepts]: Start accepts. Automaton has 25046 states and 98937 transitions. Word has length 30 [2022-03-01 18:44:42,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:44:42,294 INFO L470 AbstractCegarLoop]: Abstraction has 25046 states and 98937 transitions. [2022-03-01 18:44:42,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 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) [2022-03-01 18:44:42,294 INFO L276 IsEmpty]: Start isEmpty. Operand 25046 states and 98937 transitions. [2022-03-01 18:44:42,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:44:42,350 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:44:42,350 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:44:42,366 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2022-03-01 18:44:42,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-03-01 18:44:42,559 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:44:42,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:44:42,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1152351895, now seen corresponding path program 87 times [2022-03-01 18:44:42,560 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:44:42,560 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481204638] [2022-03-01 18:44:42,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:44:42,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:44:42,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:44:42,614 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:44:42,615 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:44:42,615 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481204638] [2022-03-01 18:44:42,615 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481204638] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:44:42,615 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134007253] [2022-03-01 18:44:42,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:44:42,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:44:42,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:44:42,616 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:44:42,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-03-01 18:44:42,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 18:44:42,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:44:42,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:44:42,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:44:42,763 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:44:42,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:44:42,859 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:44:42,859 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134007253] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:44:42,859 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:44:42,859 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-03-01 18:44:42,859 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019245815] [2022-03-01 18:44:42,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:44:42,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 18:44:42,859 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:44:42,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 18:44:42,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2022-03-01 18:44:42,860 INFO L87 Difference]: Start difference. First operand 25046 states and 98937 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 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) [2022-03-01 18:44:44,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:44:44,060 INFO L93 Difference]: Finished difference Result 43054 states and 161902 transitions. [2022-03-01 18:44:44,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-01 18:44:44,060 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 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 30 [2022-03-01 18:44:44,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:44:44,235 INFO L225 Difference]: With dead ends: 43054 [2022-03-01 18:44:44,235 INFO L226 Difference]: Without dead ends: 43046 [2022-03-01 18:44:44,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1705 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1074, Invalid=3756, Unknown=0, NotChecked=0, Total=4830 [2022-03-01 18:44:44,236 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 482 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 766 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:44:44,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [482 Valid, 272 Invalid, 866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 766 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 18:44:44,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43046 states. [2022-03-01 18:44:45,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43046 to 27549. [2022-03-01 18:44:45,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27549 states, 27548 states have (on average 3.954152751560912) internal successors, (108929), 27548 states have internal predecessors, (108929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:44:45,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27549 states to 27549 states and 108929 transitions. [2022-03-01 18:44:45,446 INFO L78 Accepts]: Start accepts. Automaton has 27549 states and 108929 transitions. Word has length 30 [2022-03-01 18:44:45,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:44:45,446 INFO L470 AbstractCegarLoop]: Abstraction has 27549 states and 108929 transitions. [2022-03-01 18:44:45,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 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) [2022-03-01 18:44:45,446 INFO L276 IsEmpty]: Start isEmpty. Operand 27549 states and 108929 transitions. [2022-03-01 18:44:45,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:44:45,502 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:44:45,502 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:44:45,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2022-03-01 18:44:45,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:44:45,717 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:44:45,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:44:45,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1422861587, now seen corresponding path program 88 times [2022-03-01 18:44:45,718 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:44:45,718 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332404802] [2022-03-01 18:44:45,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:44:45,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:44:45,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:44:45,765 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:44:45,765 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:44:45,767 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332404802] [2022-03-01 18:44:45,767 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332404802] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:44:45,767 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433581752] [2022-03-01 18:44:45,768 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:44:45,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:44:45,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:44:45,769 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:44:45,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-03-01 18:44:45,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:44:45,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:44:45,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:44:45,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:44:45,936 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:44:45,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:44:46,025 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:44:46,025 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433581752] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:44:46,026 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:44:46,026 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-03-01 18:44:46,026 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722009107] [2022-03-01 18:44:46,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:44:46,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 18:44:46,026 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:44:46,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 18:44:46,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2022-03-01 18:44:46,026 INFO L87 Difference]: Start difference. First operand 27549 states and 108929 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 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) [2022-03-01 18:44:47,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:44:47,486 INFO L93 Difference]: Finished difference Result 43663 states and 163665 transitions. [2022-03-01 18:44:47,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-01 18:44:47,487 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 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 30 [2022-03-01 18:44:47,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:44:47,634 INFO L225 Difference]: With dead ends: 43663 [2022-03-01 18:44:47,635 INFO L226 Difference]: Without dead ends: 43663 [2022-03-01 18:44:47,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2568 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1452, Invalid=5190, Unknown=0, NotChecked=0, Total=6642 [2022-03-01 18:44:47,635 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 600 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:44:47,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [600 Valid, 312 Invalid, 888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 764 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 18:44:47,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43663 states. [2022-03-01 18:44:48,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43663 to 27467. [2022-03-01 18:44:48,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27467 states, 27466 states have (on average 3.9571106094808126) internal successors, (108686), 27466 states have internal predecessors, (108686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:44:49,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27467 states to 27467 states and 108686 transitions. [2022-03-01 18:44:49,039 INFO L78 Accepts]: Start accepts. Automaton has 27467 states and 108686 transitions. Word has length 30 [2022-03-01 18:44:49,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:44:49,040 INFO L470 AbstractCegarLoop]: Abstraction has 27467 states and 108686 transitions. [2022-03-01 18:44:49,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 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) [2022-03-01 18:44:49,040 INFO L276 IsEmpty]: Start isEmpty. Operand 27467 states and 108686 transitions. [2022-03-01 18:44:49,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:44:49,099 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:44:49,099 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:44:49,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2022-03-01 18:44:49,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:44:49,305 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:44:49,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:44:49,305 INFO L85 PathProgramCache]: Analyzing trace with hash 18202575, now seen corresponding path program 27 times [2022-03-01 18:44:49,305 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:44:49,305 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846794242] [2022-03-01 18:44:49,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:44:49,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:44:49,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:44:49,347 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:44:49,347 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:44:49,347 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846794242] [2022-03-01 18:44:49,347 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846794242] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:44:49,347 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473540909] [2022-03-01 18:44:49,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:44:49,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:44:49,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:44:49,348 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:44:49,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-03-01 18:44:49,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:44:49,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:44:49,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-01 18:44:49,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:44:49,628 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-01 18:44:49,672 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-03-01 18:44:49,672 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-03-01 18:44:49,795 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 18:44:49,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:44:49,869 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-03-01 18:44:49,870 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 26 [2022-03-01 18:44:50,244 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 18:44:50,244 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473540909] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:44:50,244 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:44:50,245 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 18:44:50,245 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026228400] [2022-03-01 18:44:50,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:44:50,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 18:44:50,245 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:44:50,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 18:44:50,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-03-01 18:44:50,245 INFO L87 Difference]: Start difference. First operand 27467 states and 108686 transitions. Second operand has 25 states, 25 states have (on average 3.08) internal successors, (77), 25 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:44:52,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:44:52,052 INFO L93 Difference]: Finished difference Result 44321 states and 168181 transitions. [2022-03-01 18:44:52,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-01 18:44:52,053 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.08) internal successors, (77), 25 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:44:52,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:44:52,197 INFO L225 Difference]: With dead ends: 44321 [2022-03-01 18:44:52,197 INFO L226 Difference]: Without dead ends: 44315 [2022-03-01 18:44:52,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2427 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1140, Invalid=6516, Unknown=0, NotChecked=0, Total=7656 [2022-03-01 18:44:52,197 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 417 mSDsluCounter, 1034 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 667 SdHoareTripleChecker+Invalid, 1693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 642 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:44:52,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [417 Valid, 667 Invalid, 1693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 992 Invalid, 0 Unknown, 642 Unchecked, 0.4s Time] [2022-03-01 18:44:52,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44315 states. [2022-03-01 18:44:52,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44315 to 27675. [2022-03-01 18:44:52,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27675 states, 27674 states have (on average 3.9484353544843533) internal successors, (109269), 27674 states have internal predecessors, (109269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:44:53,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27675 states to 27675 states and 109269 transitions. [2022-03-01 18:44:53,086 INFO L78 Accepts]: Start accepts. Automaton has 27675 states and 109269 transitions. Word has length 30 [2022-03-01 18:44:53,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:44:53,086 INFO L470 AbstractCegarLoop]: Abstraction has 27675 states and 109269 transitions. [2022-03-01 18:44:53,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.08) internal successors, (77), 25 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:44:53,087 INFO L276 IsEmpty]: Start isEmpty. Operand 27675 states and 109269 transitions. [2022-03-01 18:44:53,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:44:53,142 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:44:53,142 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:44:53,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2022-03-01 18:44:53,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2022-03-01 18:44:53,358 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:44:53,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:44:53,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1450322577, now seen corresponding path program 28 times [2022-03-01 18:44:53,364 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:44:53,364 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141936499] [2022-03-01 18:44:53,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:44:53,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:44:53,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:44:53,397 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:44:53,398 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:44:53,398 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141936499] [2022-03-01 18:44:53,398 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141936499] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:44:53,398 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367177736] [2022-03-01 18:44:53,398 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:44:53,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:44:53,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:44:53,399 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:44:53,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-03-01 18:44:53,456 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:44:53,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:44:53,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:44:53,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:44:53,498 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:44:53,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:44:53,538 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:44:53,539 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367177736] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:44:53,539 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:44:53,539 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 13 [2022-03-01 18:44:53,539 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510556285] [2022-03-01 18:44:53,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:44:53,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 18:44:53,539 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:44:53,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 18:44:53,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-03-01 18:44:53,539 INFO L87 Difference]: Start difference. First operand 27675 states and 109269 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 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) [2022-03-01 18:44:54,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:44:54,183 INFO L93 Difference]: Finished difference Result 37644 states and 144252 transitions. [2022-03-01 18:44:54,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-01 18:44:54,183 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 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 30 [2022-03-01 18:44:54,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:44:54,296 INFO L225 Difference]: With dead ends: 37644 [2022-03-01 18:44:54,296 INFO L226 Difference]: Without dead ends: 37644 [2022-03-01 18:44:54,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=388, Invalid=1094, Unknown=0, NotChecked=0, Total=1482 [2022-03-01 18:44:54,297 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 229 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:44:54,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 237 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:44:54,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37644 states. [2022-03-01 18:44:55,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37644 to 27701. [2022-03-01 18:44:55,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27701 states, 27700 states have (on average 3.947509025270758) internal successors, (109346), 27700 states have internal predecessors, (109346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:44:55,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27701 states to 27701 states and 109346 transitions. [2022-03-01 18:44:55,147 INFO L78 Accepts]: Start accepts. Automaton has 27701 states and 109346 transitions. Word has length 30 [2022-03-01 18:44:55,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:44:55,148 INFO L470 AbstractCegarLoop]: Abstraction has 27701 states and 109346 transitions. [2022-03-01 18:44:55,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 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) [2022-03-01 18:44:55,148 INFO L276 IsEmpty]: Start isEmpty. Operand 27701 states and 109346 transitions. [2022-03-01 18:44:55,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:44:55,200 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:44:55,200 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:44:55,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2022-03-01 18:44:55,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:44:55,404 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:44:55,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:44:55,404 INFO L85 PathProgramCache]: Analyzing trace with hash -879017091, now seen corresponding path program 29 times [2022-03-01 18:44:55,404 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:44:55,404 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101879996] [2022-03-01 18:44:55,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:44:55,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:44:55,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:44:55,441 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:44:55,441 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:44:55,441 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101879996] [2022-03-01 18:44:55,441 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101879996] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:44:55,441 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666857914] [2022-03-01 18:44:55,441 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:44:55,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:44:55,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:44:55,442 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:44:55,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-03-01 18:44:55,503 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-01 18:44:55,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:44:55,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:44:55,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:44:55,548 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:44:55,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:44:55,594 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:44:55,594 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666857914] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:44:55,594 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:44:55,594 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-03-01 18:44:55,594 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177987990] [2022-03-01 18:44:55,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:44:55,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 18:44:55,595 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:44:55,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 18:44:55,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-03-01 18:44:55,595 INFO L87 Difference]: Start difference. First operand 27701 states and 109346 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 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) [2022-03-01 18:44:56,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:44:56,112 INFO L93 Difference]: Finished difference Result 37210 states and 143165 transitions. [2022-03-01 18:44:56,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-01 18:44:56,113 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 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 30 [2022-03-01 18:44:56,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:44:56,222 INFO L225 Difference]: With dead ends: 37210 [2022-03-01 18:44:56,222 INFO L226 Difference]: Without dead ends: 37206 [2022-03-01 18:44:56,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=266, Invalid=726, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:44:56,222 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 200 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:44:56,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 129 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:44:56,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37206 states. [2022-03-01 18:44:57,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37206 to 27701. [2022-03-01 18:44:57,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27701 states, 27700 states have (on average 3.947436823104693) internal successors, (109344), 27700 states have internal predecessors, (109344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:44:57,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27701 states to 27701 states and 109344 transitions. [2022-03-01 18:44:57,284 INFO L78 Accepts]: Start accepts. Automaton has 27701 states and 109344 transitions. Word has length 30 [2022-03-01 18:44:57,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:44:57,284 INFO L470 AbstractCegarLoop]: Abstraction has 27701 states and 109344 transitions. [2022-03-01 18:44:57,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 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) [2022-03-01 18:44:57,284 INFO L276 IsEmpty]: Start isEmpty. Operand 27701 states and 109344 transitions. [2022-03-01 18:44:57,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:44:57,350 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:44:57,350 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:44:57,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2022-03-01 18:44:57,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:44:57,550 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:44:57,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:44:57,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1727886413, now seen corresponding path program 30 times [2022-03-01 18:44:57,551 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:44:57,551 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904284634] [2022-03-01 18:44:57,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:44:57,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:44:57,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:44:57,579 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:44:57,579 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:44:57,579 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904284634] [2022-03-01 18:44:57,579 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904284634] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:44:57,579 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536170457] [2022-03-01 18:44:57,579 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:44:57,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:44:57,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:44:57,580 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:44:57,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-03-01 18:44:57,655 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-01 18:44:57,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:44:57,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:44:57,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:44:57,703 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:44:57,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:44:57,751 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:44:57,751 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536170457] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:44:57,751 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:44:57,751 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2022-03-01 18:44:57,751 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568589363] [2022-03-01 18:44:57,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:44:57,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-01 18:44:57,752 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:44:57,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-01 18:44:57,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-01 18:44:57,752 INFO L87 Difference]: Start difference. First operand 27701 states and 109344 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 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) [2022-03-01 18:44:58,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:44:58,242 INFO L93 Difference]: Finished difference Result 37382 states and 143633 transitions. [2022-03-01 18:44:58,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-01 18:44:58,242 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 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 30 [2022-03-01 18:44:58,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:44:58,352 INFO L225 Difference]: With dead ends: 37382 [2022-03-01 18:44:58,353 INFO L226 Difference]: Without dead ends: 37370 [2022-03-01 18:44:58,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=262, Invalid=794, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 18:44:58,353 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 215 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:44:58,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 145 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:44:58,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37370 states. [2022-03-01 18:44:59,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37370 to 27817. [2022-03-01 18:44:59,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27817 states, 27816 states have (on average 3.9433419614610297) internal successors, (109688), 27816 states have internal predecessors, (109688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:44:59,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27817 states to 27817 states and 109688 transitions. [2022-03-01 18:44:59,291 INFO L78 Accepts]: Start accepts. Automaton has 27817 states and 109688 transitions. Word has length 30 [2022-03-01 18:44:59,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:44:59,291 INFO L470 AbstractCegarLoop]: Abstraction has 27817 states and 109688 transitions. [2022-03-01 18:44:59,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 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) [2022-03-01 18:44:59,291 INFO L276 IsEmpty]: Start isEmpty. Operand 27817 states and 109688 transitions. [2022-03-01 18:44:59,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:44:59,360 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:44:59,360 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:44:59,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2022-03-01 18:44:59,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2022-03-01 18:44:59,576 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:44:59,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:44:59,576 INFO L85 PathProgramCache]: Analyzing trace with hash 54707119, now seen corresponding path program 89 times [2022-03-01 18:44:59,576 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:44:59,576 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76125971] [2022-03-01 18:44:59,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:44:59,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:44:59,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:44:59,620 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:44:59,620 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:44:59,620 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76125971] [2022-03-01 18:44:59,620 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76125971] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:44:59,620 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895972186] [2022-03-01 18:44:59,620 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:44:59,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:44:59,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:44:59,622 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:44:59,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-03-01 18:44:59,716 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 18:44:59,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:44:59,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:44:59,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:44:59,825 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:44:59,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:44:59,944 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:44:59,944 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895972186] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:44:59,944 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:44:59,944 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 20 [2022-03-01 18:44:59,944 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643603619] [2022-03-01 18:44:59,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:44:59,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 18:44:59,945 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:44:59,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 18:44:59,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:44:59,945 INFO L87 Difference]: Start difference. First operand 27817 states and 109688 transitions. Second operand has 20 states, 20 states have (on average 3.1) internal successors, (62), 20 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) [2022-03-01 18:45:02,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:45:02,577 INFO L93 Difference]: Finished difference Result 44676 states and 163176 transitions. [2022-03-01 18:45:02,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2022-03-01 18:45:02,578 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 20 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 30 [2022-03-01 18:45:02,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:45:02,718 INFO L225 Difference]: With dead ends: 44676 [2022-03-01 18:45:02,718 INFO L226 Difference]: Without dead ends: 44676 [2022-03-01 18:45:02,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8340 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4131, Invalid=16461, Unknown=0, NotChecked=0, Total=20592 [2022-03-01 18:45:02,719 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 710 mSDsluCounter, 817 mSDsCounter, 0 mSdLazyCounter, 1465 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 710 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 1589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 18:45:02,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [710 Valid, 505 Invalid, 1589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1465 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-01 18:45:02,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44676 states. [2022-03-01 18:45:03,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44676 to 28023. [2022-03-01 18:45:03,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28023 states, 28022 states have (on average 3.935871815002498) internal successors, (110291), 28022 states have internal predecessors, (110291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:45:03,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28023 states to 28023 states and 110291 transitions. [2022-03-01 18:45:03,929 INFO L78 Accepts]: Start accepts. Automaton has 28023 states and 110291 transitions. Word has length 30 [2022-03-01 18:45:03,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:45:03,929 INFO L470 AbstractCegarLoop]: Abstraction has 28023 states and 110291 transitions. [2022-03-01 18:45:03,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 20 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) [2022-03-01 18:45:03,930 INFO L276 IsEmpty]: Start isEmpty. Operand 28023 states and 110291 transitions. [2022-03-01 18:45:03,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:45:03,997 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:45:03,997 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:45:04,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2022-03-01 18:45:04,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:45:04,212 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:45:04,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:45:04,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1978483925, now seen corresponding path program 90 times [2022-03-01 18:45:04,212 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:45:04,212 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621296810] [2022-03-01 18:45:04,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:45:04,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:45:04,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:45:04,261 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:45:04,261 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:45:04,261 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621296810] [2022-03-01 18:45:04,261 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621296810] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:45:04,261 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118832403] [2022-03-01 18:45:04,262 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:45:04,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:45:04,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:45:04,272 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:45:04,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-03-01 18:45:04,381 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 18:45:04,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:45:04,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:45:04,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:45:04,480 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:45:04,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:45:04,570 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:45:04,570 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118832403] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:45:04,570 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:45:04,570 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 20 [2022-03-01 18:45:04,570 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976279147] [2022-03-01 18:45:04,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:45:04,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 18:45:04,571 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:45:04,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 18:45:04,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:45:04,571 INFO L87 Difference]: Start difference. First operand 28023 states and 110291 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:45:07,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:45:07,618 INFO L93 Difference]: Finished difference Result 52292 states and 190560 transitions. [2022-03-01 18:45:07,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2022-03-01 18:45:07,618 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:45:07,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:45:07,793 INFO L225 Difference]: With dead ends: 52292 [2022-03-01 18:45:07,794 INFO L226 Difference]: Without dead ends: 52292 [2022-03-01 18:45:07,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9910 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4480, Invalid=19390, Unknown=0, NotChecked=0, Total=23870 [2022-03-01 18:45:07,795 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 699 mSDsluCounter, 857 mSDsCounter, 0 mSdLazyCounter, 1608 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 699 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 1739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 1608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 18:45:07,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [699 Valid, 513 Invalid, 1739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 1608 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-01 18:45:07,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52292 states. [2022-03-01 18:45:08,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52292 to 27802. [2022-03-01 18:45:08,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27802 states, 27801 states have (on average 3.942987662314305) internal successors, (109619), 27801 states have internal predecessors, (109619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:45:08,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27802 states to 27802 states and 109619 transitions. [2022-03-01 18:45:08,993 INFO L78 Accepts]: Start accepts. Automaton has 27802 states and 109619 transitions. Word has length 30 [2022-03-01 18:45:08,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:45:08,993 INFO L470 AbstractCegarLoop]: Abstraction has 27802 states and 109619 transitions. [2022-03-01 18:45:08,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:45:08,993 INFO L276 IsEmpty]: Start isEmpty. Operand 27802 states and 109619 transitions. [2022-03-01 18:45:09,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 18:45:09,050 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:45:09,050 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:45:09,066 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2022-03-01 18:45:09,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:45:09,255 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:45:09,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:45:09,256 INFO L85 PathProgramCache]: Analyzing trace with hash 711634513, now seen corresponding path program 91 times [2022-03-01 18:45:09,256 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:45:09,256 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670466161] [2022-03-01 18:45:09,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:45:09,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:45:09,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:45:09,634 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:45:09,634 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:45:09,634 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670466161] [2022-03-01 18:45:09,634 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670466161] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:45:09,634 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934694880] [2022-03-01 18:45:09,634 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:45:09,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:45:09,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:45:09,636 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:45:09,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-03-01 18:45:09,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:45:09,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:45:09,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:45:09,995 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-01 18:45:10,068 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-03-01 18:45:10,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:45:10,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:45:10,104 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 28 [2022-03-01 18:45:10,192 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:45:10,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:45:10,244 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:45:10,251 INFO L353 Elim1Store]: treesize reduction 10, result has 47.4 percent of original size [2022-03-01 18:45:10,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 22 [2022-03-01 18:45:10,650 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:45:10,650 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934694880] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:45:10,650 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:45:10,650 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2022-03-01 18:45:10,650 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115640032] [2022-03-01 18:45:10,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:45:10,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-01 18:45:10,650 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:45:10,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-01 18:45:10,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=1081, Unknown=0, NotChecked=0, Total=1332 [2022-03-01 18:45:10,651 INFO L87 Difference]: Start difference. First operand 27802 states and 109619 transitions. Second operand has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:45:14,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:45:14,185 INFO L93 Difference]: Finished difference Result 36879 states and 140874 transitions. [2022-03-01 18:45:14,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-01 18:45:14,185 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-01 18:45:14,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:45:14,311 INFO L225 Difference]: With dead ends: 36879 [2022-03-01 18:45:14,312 INFO L226 Difference]: Without dead ends: 36616 [2022-03-01 18:45:14,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3055 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1832, Invalid=6910, Unknown=0, NotChecked=0, Total=8742 [2022-03-01 18:45:14,312 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 841 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 1382 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 841 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 1841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 1382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 215 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:45:14,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [841 Valid, 384 Invalid, 1841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 1382 Invalid, 0 Unknown, 215 Unchecked, 0.6s Time] [2022-03-01 18:45:14,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36616 states. [2022-03-01 18:45:15,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36616 to 27982. [2022-03-01 18:45:15,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27982 states, 27981 states have (on average 3.940352381973482) internal successors, (110255), 27981 states have internal predecessors, (110255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:45:15,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27982 states to 27982 states and 110255 transitions. [2022-03-01 18:45:15,239 INFO L78 Accepts]: Start accepts. Automaton has 27982 states and 110255 transitions. Word has length 32 [2022-03-01 18:45:15,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:45:15,239 INFO L470 AbstractCegarLoop]: Abstraction has 27982 states and 110255 transitions. [2022-03-01 18:45:15,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:45:15,239 INFO L276 IsEmpty]: Start isEmpty. Operand 27982 states and 110255 transitions. [2022-03-01 18:45:15,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 18:45:15,292 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:45:15,292 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:45:15,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2022-03-01 18:45:15,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-03-01 18:45:15,508 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:45:15,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:45:15,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1875228809, now seen corresponding path program 92 times [2022-03-01 18:45:15,508 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:45:15,508 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336771208] [2022-03-01 18:45:15,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:45:15,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:45:15,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:45:15,851 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:45:15,851 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:45:15,851 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336771208] [2022-03-01 18:45:15,851 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336771208] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:45:15,851 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110274643] [2022-03-01 18:45:15,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:45:15,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:45:15,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:45:15,852 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:45:15,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-03-01 18:45:15,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:45:15,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:45:15,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:45:15,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:45:16,156 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:45:16,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:45:16,232 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-03-01 18:45:16,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:45:16,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:45:16,302 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 28 [2022-03-01 18:45:16,481 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:45:16,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:45:16,550 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-03-01 18:45:16,550 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 26 [2022-03-01 18:45:16,938 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:45:16,938 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110274643] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:45:16,938 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:45:16,938 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2022-03-01 18:45:16,938 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912189631] [2022-03-01 18:45:16,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:45:16,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-01 18:45:16,938 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:45:16,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-01 18:45:16,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=1085, Unknown=0, NotChecked=0, Total=1332 [2022-03-01 18:45:16,939 INFO L87 Difference]: Start difference. First operand 27982 states and 110255 transitions. Second operand has 37 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 37 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:45:23,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:45:23,027 INFO L93 Difference]: Finished difference Result 39522 states and 149006 transitions. [2022-03-01 18:45:23,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-01 18:45:23,028 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 37 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-01 18:45:23,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:45:23,173 INFO L225 Difference]: With dead ends: 39522 [2022-03-01 18:45:23,173 INFO L226 Difference]: Without dead ends: 39176 [2022-03-01 18:45:23,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3625 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=2163, Invalid=8139, Unknown=0, NotChecked=0, Total=10302 [2022-03-01 18:45:23,173 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 981 mSDsluCounter, 781 mSDsCounter, 0 mSdLazyCounter, 1274 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 981 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 1852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 1274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 280 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 18:45:23,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [981 Valid, 420 Invalid, 1852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 1274 Invalid, 0 Unknown, 280 Unchecked, 0.8s Time] [2022-03-01 18:45:23,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39176 states. [2022-03-01 18:45:23,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39176 to 28043. [2022-03-01 18:45:23,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28043 states, 28042 states have (on average 3.940196847585764) internal successors, (110491), 28042 states have internal predecessors, (110491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:45:24,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28043 states to 28043 states and 110491 transitions. [2022-03-01 18:45:24,102 INFO L78 Accepts]: Start accepts. Automaton has 28043 states and 110491 transitions. Word has length 32 [2022-03-01 18:45:24,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:45:24,102 INFO L470 AbstractCegarLoop]: Abstraction has 28043 states and 110491 transitions. [2022-03-01 18:45:24,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 37 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:45:24,102 INFO L276 IsEmpty]: Start isEmpty. Operand 28043 states and 110491 transitions. [2022-03-01 18:45:24,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 18:45:24,170 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:45:24,170 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:45:24,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2022-03-01 18:45:24,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:45:24,391 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:45:24,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:45:24,392 INFO L85 PathProgramCache]: Analyzing trace with hash 359458385, now seen corresponding path program 93 times [2022-03-01 18:45:24,392 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:45:24,392 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462745859] [2022-03-01 18:45:24,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:45:24,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:45:24,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:45:24,939 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:45:24,939 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:45:24,939 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462745859] [2022-03-01 18:45:24,939 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462745859] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:45:24,939 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777213586] [2022-03-01 18:45:24,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:45:24,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:45:24,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:45:24,940 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:45:24,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-03-01 18:45:25,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 18:45:25,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:45:25,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 18:45:25,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:45:25,199 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:45:25,240 INFO L353 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2022-03-01 18:45:25,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2022-03-01 18:45:25,340 INFO L353 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-03-01 18:45:25,340 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2022-03-01 18:45:25,450 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-01 18:45:25,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:45:25,577 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:45:25,596 INFO L353 Elim1Store]: treesize reduction 15, result has 66.7 percent of original size [2022-03-01 18:45:25,596 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 46 [2022-03-01 18:45:25,772 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-01 18:45:25,772 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777213586] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:45:25,772 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:45:25,772 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 11] total 33 [2022-03-01 18:45:25,773 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797936315] [2022-03-01 18:45:25,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:45:25,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 18:45:25,773 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:45:25,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 18:45:25,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=913, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 18:45:25,773 INFO L87 Difference]: Start difference. First operand 28043 states and 110491 transitions. Second operand has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:45:38,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:45:38,567 INFO L93 Difference]: Finished difference Result 62877 states and 234181 transitions. [2022-03-01 18:45:38,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2022-03-01 18:45:38,567 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-01 18:45:38,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:45:38,773 INFO L225 Difference]: With dead ends: 62877 [2022-03-01 18:45:38,773 INFO L226 Difference]: Without dead ends: 62312 [2022-03-01 18:45:38,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20796 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=5172, Invalid=44780, Unknown=0, NotChecked=0, Total=49952 [2022-03-01 18:45:38,774 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 1607 mSDsluCounter, 1460 mSDsCounter, 0 mSdLazyCounter, 1886 mSolverCounterSat, 406 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1607 SdHoareTripleChecker+Valid, 881 SdHoareTripleChecker+Invalid, 3744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 406 IncrementalHoareTripleChecker+Valid, 1886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1452 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:45:38,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1607 Valid, 881 Invalid, 3744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [406 Valid, 1886 Invalid, 0 Unknown, 1452 Unchecked, 1.2s Time] [2022-03-01 18:45:38,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62312 states. [2022-03-01 18:45:39,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62312 to 29543. [2022-03-01 18:45:39,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29543 states, 29542 states have (on average 3.9225509444181164) internal successors, (115880), 29542 states have internal predecessors, (115880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:45:40,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29543 states to 29543 states and 115880 transitions. [2022-03-01 18:45:40,142 INFO L78 Accepts]: Start accepts. Automaton has 29543 states and 115880 transitions. Word has length 32 [2022-03-01 18:45:40,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:45:40,142 INFO L470 AbstractCegarLoop]: Abstraction has 29543 states and 115880 transitions. [2022-03-01 18:45:40,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:45:40,143 INFO L276 IsEmpty]: Start isEmpty. Operand 29543 states and 115880 transitions. [2022-03-01 18:45:40,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 18:45:40,208 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:45:40,208 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:45:40,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2022-03-01 18:45:40,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-03-01 18:45:40,420 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:45:40,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:45:40,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1371311347, now seen corresponding path program 94 times [2022-03-01 18:45:40,420 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:45:40,420 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042830328] [2022-03-01 18:45:40,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:45:40,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:45:40,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:45:40,851 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:45:40,852 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:45:40,852 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042830328] [2022-03-01 18:45:40,852 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042830328] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:45:40,852 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535167454] [2022-03-01 18:45:40,852 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:45:40,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:45:40,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:45:40,853 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:45:40,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-03-01 18:45:40,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:45:40,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:45:40,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:45:40,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:45:41,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-01 18:45:41,246 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-03-01 18:45:41,247 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-03-01 18:45:41,364 INFO L353 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-03-01 18:45:41,364 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2022-03-01 18:45:41,450 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:45:41,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:45:41,562 INFO L353 Elim1Store]: treesize reduction 25, result has 54.5 percent of original size [2022-03-01 18:45:41,563 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 46 [2022-03-01 18:45:42,177 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:45:42,178 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535167454] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:45:42,178 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:45:42,178 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 38 [2022-03-01 18:45:42,178 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465540400] [2022-03-01 18:45:42,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:45:42,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-01 18:45:42,178 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:45:42,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-01 18:45:42,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1215, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 18:45:42,179 INFO L87 Difference]: Start difference. First operand 29543 states and 115880 transitions. Second operand has 38 states, 38 states have (on average 2.236842105263158) 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) [2022-03-01 18:45:48,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:45:48,132 INFO L93 Difference]: Finished difference Result 38388 states and 146336 transitions. [2022-03-01 18:45:48,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-03-01 18:45:48,132 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.236842105263158) 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 32 [2022-03-01 18:45:48,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:45:48,243 INFO L225 Difference]: With dead ends: 38388 [2022-03-01 18:45:48,244 INFO L226 Difference]: Without dead ends: 38273 [2022-03-01 18:45:48,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4424 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=2049, Invalid=11993, Unknown=0, NotChecked=0, Total=14042 [2022-03-01 18:45:48,245 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 653 mSDsluCounter, 1001 mSDsCounter, 0 mSdLazyCounter, 1575 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 653 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 2305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 1575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 584 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 18:45:48,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [653 Valid, 595 Invalid, 2305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 1575 Invalid, 0 Unknown, 584 Unchecked, 0.8s Time] [2022-03-01 18:45:48,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38273 states. [2022-03-01 18:45:49,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38273 to 29659. [2022-03-01 18:45:49,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29659 states, 29658 states have (on average 3.919751837615483) internal successors, (116252), 29658 states have internal predecessors, (116252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:45:49,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29659 states to 29659 states and 116252 transitions. [2022-03-01 18:45:49,222 INFO L78 Accepts]: Start accepts. Automaton has 29659 states and 116252 transitions. Word has length 32 [2022-03-01 18:45:49,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:45:49,222 INFO L470 AbstractCegarLoop]: Abstraction has 29659 states and 116252 transitions. [2022-03-01 18:45:49,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.236842105263158) 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) [2022-03-01 18:45:49,222 INFO L276 IsEmpty]: Start isEmpty. Operand 29659 states and 116252 transitions. [2022-03-01 18:45:49,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 18:45:49,292 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:45:49,292 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:45:49,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2022-03-01 18:45:49,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-03-01 18:45:49,509 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:45:49,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:45:49,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1785520251, now seen corresponding path program 31 times [2022-03-01 18:45:49,509 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:45:49,509 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575745825] [2022-03-01 18:45:49,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:45:49,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:45:49,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:45:49,955 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:45:49,956 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:45:49,956 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575745825] [2022-03-01 18:45:49,956 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575745825] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:45:49,956 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429962255] [2022-03-01 18:45:49,956 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:45:49,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:45:49,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:45:49,957 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:45:49,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-03-01 18:45:50,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:45:50,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-01 18:45:50,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:45:50,372 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:45:50,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:45:50,423 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2022-03-01 18:45:50,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:45:50,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:45:50,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:45:50,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 36 [2022-03-01 18:45:50,562 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:45:50,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:45:50,657 INFO L353 Elim1Store]: treesize reduction 47, result has 23.0 percent of original size [2022-03-01 18:45:50,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 32 [2022-03-01 18:45:50,946 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:45:50,946 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429962255] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:45:50,946 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:45:50,946 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 39 [2022-03-01 18:45:50,946 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672352707] [2022-03-01 18:45:50,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:45:50,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-01 18:45:50,947 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:45:50,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-01 18:45:50,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1362, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 18:45:50,947 INFO L87 Difference]: Start difference. First operand 29659 states and 116252 transitions. Second operand has 40 states, 40 states have (on average 2.175) internal successors, (87), 39 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:45:54,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:45:54,983 INFO L93 Difference]: Finished difference Result 49841 states and 188499 transitions. [2022-03-01 18:45:54,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-03-01 18:45:54,991 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.175) internal successors, (87), 39 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-01 18:45:54,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:45:55,165 INFO L225 Difference]: With dead ends: 49841 [2022-03-01 18:45:55,165 INFO L226 Difference]: Without dead ends: 49694 [2022-03-01 18:45:55,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4098 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1850, Invalid=11490, Unknown=0, NotChecked=0, Total=13340 [2022-03-01 18:45:55,166 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 565 mSDsluCounter, 900 mSDsCounter, 0 mSdLazyCounter, 1946 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 2180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 1946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 18:45:55,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [565 Valid, 458 Invalid, 2180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 1946 Invalid, 0 Unknown, 87 Unchecked, 0.8s Time] [2022-03-01 18:45:55,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49694 states. [2022-03-01 18:45:55,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49694 to 29815. [2022-03-01 18:45:56,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29815 states, 29814 states have (on average 3.91373180385054) internal successors, (116684), 29814 states have internal predecessors, (116684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:45:56,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29815 states to 29815 states and 116684 transitions. [2022-03-01 18:45:56,119 INFO L78 Accepts]: Start accepts. Automaton has 29815 states and 116684 transitions. Word has length 32 [2022-03-01 18:45:56,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:45:56,119 INFO L470 AbstractCegarLoop]: Abstraction has 29815 states and 116684 transitions. [2022-03-01 18:45:56,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.175) internal successors, (87), 39 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:45:56,119 INFO L276 IsEmpty]: Start isEmpty. Operand 29815 states and 116684 transitions. [2022-03-01 18:45:56,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 18:45:56,178 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:45:56,178 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:45:56,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2022-03-01 18:45:56,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2022-03-01 18:45:56,381 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:45:56,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:45:56,381 INFO L85 PathProgramCache]: Analyzing trace with hash 821200773, now seen corresponding path program 32 times [2022-03-01 18:45:56,382 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:45:56,382 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726641090] [2022-03-01 18:45:56,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:45:56,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:45:56,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:45:56,827 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:45:56,827 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:45:56,827 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726641090] [2022-03-01 18:45:56,828 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726641090] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:45:56,828 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070136380] [2022-03-01 18:45:56,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:45:56,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:45:56,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:45:56,829 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:45:56,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-03-01 18:45:57,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:45:57,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:45:57,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-01 18:45:57,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:45:57,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-01 18:45:57,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:45:57,432 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2022-03-01 18:45:57,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:45:57,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:45:57,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:45:57,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 36 [2022-03-01 18:45:57,547 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:45:57,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:45:57,636 INFO L353 Elim1Store]: treesize reduction 47, result has 23.0 percent of original size [2022-03-01 18:45:57,637 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 32 [2022-03-01 18:45:57,939 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:45:57,940 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070136380] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:45:57,940 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:45:57,940 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 38 [2022-03-01 18:45:57,940 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799968537] [2022-03-01 18:45:57,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:45:57,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-01 18:45:57,941 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:45:57,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-01 18:45:57,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1306, Unknown=0, NotChecked=0, Total=1482 [2022-03-01 18:45:57,942 INFO L87 Difference]: Start difference. First operand 29815 states and 116684 transitions. Second operand has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:46:05,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:46:05,878 INFO L93 Difference]: Finished difference Result 50727 states and 190959 transitions. [2022-03-01 18:46:05,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-03-01 18:46:05,879 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-01 18:46:05,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:46:06,039 INFO L225 Difference]: With dead ends: 50727 [2022-03-01 18:46:06,039 INFO L226 Difference]: Without dead ends: 50618 [2022-03-01 18:46:06,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8748 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=3166, Invalid=21956, Unknown=0, NotChecked=0, Total=25122 [2022-03-01 18:46:06,040 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 642 mSDsluCounter, 1444 mSDsCounter, 0 mSdLazyCounter, 3253 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 642 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 3518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 3253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:46:06,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [642 Valid, 751 Invalid, 3518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 3253 Invalid, 0 Unknown, 92 Unchecked, 1.5s Time] [2022-03-01 18:46:06,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50618 states. [2022-03-01 18:46:06,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50618 to 29913. [2022-03-01 18:46:06,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29913 states, 29912 states have (on average 3.9116073816528485) internal successors, (117004), 29912 states have internal predecessors, (117004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:46:07,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29913 states to 29913 states and 117004 transitions. [2022-03-01 18:46:07,057 INFO L78 Accepts]: Start accepts. Automaton has 29913 states and 117004 transitions. Word has length 32 [2022-03-01 18:46:07,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:46:07,058 INFO L470 AbstractCegarLoop]: Abstraction has 29913 states and 117004 transitions. [2022-03-01 18:46:07,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:46:07,058 INFO L276 IsEmpty]: Start isEmpty. Operand 29913 states and 117004 transitions. [2022-03-01 18:46:07,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 18:46:07,126 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:46:07,126 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:46:07,142 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2022-03-01 18:46:07,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:46:07,332 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:46:07,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:46:07,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1118337783, now seen corresponding path program 33 times [2022-03-01 18:46:07,333 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:46:07,333 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636427195] [2022-03-01 18:46:07,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:46:07,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:46:07,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:46:07,723 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:46:07,723 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:46:07,723 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636427195] [2022-03-01 18:46:07,723 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636427195] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:46:07,723 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988085605] [2022-03-01 18:46:07,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:46:07,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:46:07,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:46:07,972 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:46:07,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-03-01 18:46:08,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 18:46:08,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:46:08,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-01 18:46:08,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:46:08,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-01 18:46:08,260 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-03-01 18:46:08,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-03-01 18:46:08,438 INFO L353 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2022-03-01 18:46:08,438 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2022-03-01 18:46:08,618 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-01 18:46:08,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:46:08,775 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-03-01 18:46:08,775 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 26 [2022-03-01 18:46:09,039 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-01 18:46:09,039 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988085605] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:46:09,039 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:46:09,039 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-03-01 18:46:09,040 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831263514] [2022-03-01 18:46:09,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:46:09,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 18:46:09,040 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:46:09,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 18:46:09,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:46:09,040 INFO L87 Difference]: Start difference. First operand 29913 states and 117004 transitions. Second operand has 30 states, 30 states have (on average 2.5) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:46:12,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:46:12,421 INFO L93 Difference]: Finished difference Result 70378 states and 273867 transitions. [2022-03-01 18:46:12,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-01 18:46:12,421 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.5) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-01 18:46:12,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:46:12,668 INFO L225 Difference]: With dead ends: 70378 [2022-03-01 18:46:12,668 INFO L226 Difference]: Without dead ends: 70242 [2022-03-01 18:46:12,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 68 SyntacticMatches, 8 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3095 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1639, Invalid=7481, Unknown=0, NotChecked=0, Total=9120 [2022-03-01 18:46:12,669 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 485 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 1109 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 2633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1431 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:46:12,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [485 Valid, 402 Invalid, 2633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1109 Invalid, 0 Unknown, 1431 Unchecked, 0.5s Time] [2022-03-01 18:46:12,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70242 states. [2022-03-01 18:46:13,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70242 to 30700. [2022-03-01 18:46:13,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30700 states, 30699 states have (on average 3.8947848464119352) internal successors, (119566), 30699 states have internal predecessors, (119566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:46:14,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30700 states to 30700 states and 119566 transitions. [2022-03-01 18:46:14,014 INFO L78 Accepts]: Start accepts. Automaton has 30700 states and 119566 transitions. Word has length 32 [2022-03-01 18:46:14,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:46:14,014 INFO L470 AbstractCegarLoop]: Abstraction has 30700 states and 119566 transitions. [2022-03-01 18:46:14,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.5) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:46:14,014 INFO L276 IsEmpty]: Start isEmpty. Operand 30700 states and 119566 transitions. [2022-03-01 18:46:14,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 18:46:14,079 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:46:14,079 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:46:14,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2022-03-01 18:46:14,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:46:14,287 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:46:14,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:46:14,287 INFO L85 PathProgramCache]: Analyzing trace with hash -2101897271, now seen corresponding path program 95 times [2022-03-01 18:46:14,287 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:46:14,288 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103755299] [2022-03-01 18:46:14,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:46:14,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:46:14,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:46:14,712 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:46:14,713 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:46:14,713 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103755299] [2022-03-01 18:46:14,713 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103755299] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:46:14,713 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773681542] [2022-03-01 18:46:14,713 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:46:14,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:46:14,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:46:14,714 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:46:14,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-03-01 18:46:14,782 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 18:46:14,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:46:14,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 18:46:14,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:46:15,103 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:46:15,154 INFO L353 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2022-03-01 18:46:15,154 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2022-03-01 18:46:15,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:46:15,269 INFO L353 Elim1Store]: treesize reduction 27, result has 15.6 percent of original size [2022-03-01 18:46:15,269 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 32 [2022-03-01 18:46:15,395 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:46:15,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:46:15,524 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-03-01 18:46:15,524 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 26 [2022-03-01 18:46:15,774 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:46:15,775 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773681542] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:46:15,775 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:46:15,775 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 37 [2022-03-01 18:46:15,775 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234078144] [2022-03-01 18:46:15,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:46:15,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-01 18:46:15,775 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:46:15,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-01 18:46:15,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1169, Unknown=0, NotChecked=0, Total=1332 [2022-03-01 18:46:15,775 INFO L87 Difference]: Start difference. First operand 30700 states and 119566 transitions. Second operand has 37 states, 37 states have (on average 2.2972972972972974) 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) [2022-03-01 18:46:27,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:46:27,881 INFO L93 Difference]: Finished difference Result 49606 states and 183648 transitions. [2022-03-01 18:46:27,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2022-03-01 18:46:27,882 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.2972972972972974) 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 32 [2022-03-01 18:46:27,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:46:28,023 INFO L225 Difference]: With dead ends: 49606 [2022-03-01 18:46:28,024 INFO L226 Difference]: Without dead ends: 49138 [2022-03-01 18:46:28,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13021 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=4134, Invalid=29172, Unknown=0, NotChecked=0, Total=33306 [2022-03-01 18:46:28,025 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 1154 mSDsluCounter, 1670 mSDsCounter, 0 mSdLazyCounter, 2055 mSolverCounterSat, 321 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1154 SdHoareTripleChecker+Valid, 980 SdHoareTripleChecker+Invalid, 3385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 321 IncrementalHoareTripleChecker+Valid, 2055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1009 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:46:28,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1154 Valid, 980 Invalid, 3385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [321 Valid, 2055 Invalid, 0 Unknown, 1009 Unchecked, 1.2s Time] [2022-03-01 18:46:28,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49138 states. [2022-03-01 18:46:28,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49138 to 31406. [2022-03-01 18:46:28,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31406 states, 31405 states have (on average 3.8996656583346603) internal successors, (122469), 31405 states have internal predecessors, (122469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:46:28,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31406 states to 31406 states and 122469 transitions. [2022-03-01 18:46:28,997 INFO L78 Accepts]: Start accepts. Automaton has 31406 states and 122469 transitions. Word has length 32 [2022-03-01 18:46:28,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:46:28,997 INFO L470 AbstractCegarLoop]: Abstraction has 31406 states and 122469 transitions. [2022-03-01 18:46:28,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.2972972972972974) 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) [2022-03-01 18:46:28,997 INFO L276 IsEmpty]: Start isEmpty. Operand 31406 states and 122469 transitions. [2022-03-01 18:46:29,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 18:46:29,056 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:46:29,056 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:46:29,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2022-03-01 18:46:29,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2022-03-01 18:46:29,265 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:46:29,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:46:29,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1716388341, now seen corresponding path program 96 times [2022-03-01 18:46:29,265 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:46:29,265 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145448878] [2022-03-01 18:46:29,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:46:29,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:46:29,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:46:29,850 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:46:29,850 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:46:29,850 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145448878] [2022-03-01 18:46:29,850 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145448878] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:46:29,850 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909642007] [2022-03-01 18:46:29,851 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:46:29,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:46:29,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:46:29,852 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:46:29,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-03-01 18:46:29,934 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 18:46:29,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:46:29,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 18:46:29,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:46:30,107 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-01 18:46:30,159 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-03-01 18:46:30,159 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-03-01 18:46:30,273 INFO L353 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2022-03-01 18:46:30,273 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2022-03-01 18:46:30,434 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-01 18:46:30,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:46:30,601 INFO L353 Elim1Store]: treesize reduction 15, result has 69.4 percent of original size [2022-03-01 18:46:30,601 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 22 treesize of output 48 [2022-03-01 18:46:30,865 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-01 18:46:30,865 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909642007] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:46:30,865 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:46:30,865 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 32 [2022-03-01 18:46:30,865 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198967406] [2022-03-01 18:46:30,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:46:30,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 18:46:30,866 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:46:30,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 18:46:30,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=852, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:46:30,866 INFO L87 Difference]: Start difference. First operand 31406 states and 122469 transitions. Second operand has 32 states, 32 states have (on average 2.46875) internal successors, (79), 32 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) [2022-03-01 18:46:33,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:46:33,273 INFO L93 Difference]: Finished difference Result 40271 states and 152289 transitions. [2022-03-01 18:46:33,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-01 18:46:33,274 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 32 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 32 [2022-03-01 18:46:33,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:46:33,483 INFO L225 Difference]: With dead ends: 40271 [2022-03-01 18:46:33,483 INFO L226 Difference]: Without dead ends: 40181 [2022-03-01 18:46:33,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1513 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=864, Invalid=4836, Unknown=0, NotChecked=0, Total=5700 [2022-03-01 18:46:33,484 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 536 mSDsluCounter, 818 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 1918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1174 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:46:33,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [536 Valid, 446 Invalid, 1918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 653 Invalid, 0 Unknown, 1174 Unchecked, 0.5s Time] [2022-03-01 18:46:33,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40181 states. [2022-03-01 18:46:34,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40181 to 32058. [2022-03-01 18:46:34,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32058 states, 32057 states have (on average 3.8911626165892006) internal successors, (124739), 32057 states have internal predecessors, (124739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:46:34,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32058 states to 32058 states and 124739 transitions. [2022-03-01 18:46:34,276 INFO L78 Accepts]: Start accepts. Automaton has 32058 states and 124739 transitions. Word has length 32 [2022-03-01 18:46:34,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:46:34,276 INFO L470 AbstractCegarLoop]: Abstraction has 32058 states and 124739 transitions. [2022-03-01 18:46:34,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 32 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) [2022-03-01 18:46:34,276 INFO L276 IsEmpty]: Start isEmpty. Operand 32058 states and 124739 transitions. [2022-03-01 18:46:34,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 18:46:34,482 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:46:34,482 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:46:34,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2022-03-01 18:46:34,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable130 [2022-03-01 18:46:34,695 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:46:34,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:46:34,696 INFO L85 PathProgramCache]: Analyzing trace with hash -882005515, now seen corresponding path program 97 times [2022-03-01 18:46:34,696 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:46:34,696 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654631260] [2022-03-01 18:46:34,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:46:34,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:46:34,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:46:35,094 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:46:35,094 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:46:35,094 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654631260] [2022-03-01 18:46:35,095 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654631260] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:46:35,095 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519010685] [2022-03-01 18:46:35,095 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:46:35,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:46:35,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:46:35,096 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:46:35,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-03-01 18:46:35,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:46:35,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:46:35,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:46:35,494 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-01 18:46:35,546 INFO L353 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-03-01 18:46:35,546 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2022-03-01 18:46:35,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:46:35,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:46:35,604 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 28 [2022-03-01 18:46:35,726 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:46:35,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:46:35,805 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:46:35,829 INFO L353 Elim1Store]: treesize reduction 15, result has 66.7 percent of original size [2022-03-01 18:46:35,829 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 46 [2022-03-01 18:46:36,259 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:46:36,259 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519010685] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:46:36,260 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:46:36,260 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 38 [2022-03-01 18:46:36,260 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908067529] [2022-03-01 18:46:36,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:46:36,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-01 18:46:36,260 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:46:36,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-01 18:46:36,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1162, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 18:46:36,260 INFO L87 Difference]: Start difference. First operand 32058 states and 124739 transitions. Second operand has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:46:40,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:46:40,184 INFO L93 Difference]: Finished difference Result 42967 states and 160976 transitions. [2022-03-01 18:46:40,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-01 18:46:40,184 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-01 18:46:40,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:46:40,331 INFO L225 Difference]: With dead ends: 42967 [2022-03-01 18:46:40,331 INFO L226 Difference]: Without dead ends: 42893 [2022-03-01 18:46:40,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2927 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1567, Invalid=7175, Unknown=0, NotChecked=0, Total=8742 [2022-03-01 18:46:40,332 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 698 mSDsluCounter, 695 mSDsCounter, 0 mSdLazyCounter, 1184 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 698 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 1691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 1184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 315 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:46:40,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [698 Valid, 470 Invalid, 1691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 1184 Invalid, 0 Unknown, 315 Unchecked, 0.7s Time] [2022-03-01 18:46:40,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42893 states. [2022-03-01 18:46:41,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42893 to 32213. [2022-03-01 18:46:41,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32213 states, 32212 states have (on average 3.886532969079846) internal successors, (125193), 32212 states have internal predecessors, (125193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:46:41,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32213 states to 32213 states and 125193 transitions. [2022-03-01 18:46:41,384 INFO L78 Accepts]: Start accepts. Automaton has 32213 states and 125193 transitions. Word has length 32 [2022-03-01 18:46:41,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:46:41,384 INFO L470 AbstractCegarLoop]: Abstraction has 32213 states and 125193 transitions. [2022-03-01 18:46:41,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:46:41,384 INFO L276 IsEmpty]: Start isEmpty. Operand 32213 states and 125193 transitions. [2022-03-01 18:46:41,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 18:46:41,454 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:46:41,454 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:46:41,470 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Ended with exit code 0 [2022-03-01 18:46:41,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:46:41,663 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:46:41,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:46:41,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1588284495, now seen corresponding path program 98 times [2022-03-01 18:46:41,664 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:46:41,664 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547441873] [2022-03-01 18:46:41,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:46:41,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:46:41,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:46:42,075 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:46:42,076 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:46:42,076 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547441873] [2022-03-01 18:46:42,076 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547441873] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:46:42,076 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349527703] [2022-03-01 18:46:42,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:46:42,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:46:42,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:46:42,077 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:46:42,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-03-01 18:46:42,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:46:42,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:46:42,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:46:42,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:46:42,549 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-01 18:46:42,584 INFO L353 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-03-01 18:46:42,584 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2022-03-01 18:46:42,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:46:42,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:46:42,668 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 28 [2022-03-01 18:46:42,773 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:46:42,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:46:42,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:46:42,840 INFO L353 Elim1Store]: treesize reduction 15, result has 66.7 percent of original size [2022-03-01 18:46:42,840 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 46 [2022-03-01 18:46:43,132 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:46:43,133 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349527703] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:46:43,133 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:46:43,133 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 38 [2022-03-01 18:46:43,133 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782999614] [2022-03-01 18:46:43,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:46:43,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-01 18:46:43,133 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:46:43,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-01 18:46:43,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1162, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 18:46:43,134 INFO L87 Difference]: Start difference. First operand 32213 states and 125193 transitions. Second operand has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:46:46,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:46:46,812 INFO L93 Difference]: Finished difference Result 43018 states and 161098 transitions. [2022-03-01 18:46:46,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-01 18:46:46,812 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-01 18:46:46,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:46:46,923 INFO L225 Difference]: With dead ends: 43018 [2022-03-01 18:46:46,923 INFO L226 Difference]: Without dead ends: 42912 [2022-03-01 18:46:46,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3121 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1717, Invalid=7403, Unknown=0, NotChecked=0, Total=9120 [2022-03-01 18:46:46,924 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 715 mSDsluCounter, 762 mSDsCounter, 0 mSdLazyCounter, 1549 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 715 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 1979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 1549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 182 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 18:46:46,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [715 Valid, 466 Invalid, 1979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 1549 Invalid, 0 Unknown, 182 Unchecked, 0.8s Time] [2022-03-01 18:46:46,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42912 states. [2022-03-01 18:46:47,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42912 to 32162. [2022-03-01 18:46:47,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32162 states, 32161 states have (on average 3.887565685146606) internal successors, (125028), 32161 states have internal predecessors, (125028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:46:47,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32162 states to 32162 states and 125028 transitions. [2022-03-01 18:46:47,964 INFO L78 Accepts]: Start accepts. Automaton has 32162 states and 125028 transitions. Word has length 32 [2022-03-01 18:46:47,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:46:47,964 INFO L470 AbstractCegarLoop]: Abstraction has 32162 states and 125028 transitions. [2022-03-01 18:46:47,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:46:47,964 INFO L276 IsEmpty]: Start isEmpty. Operand 32162 states and 125028 transitions. [2022-03-01 18:46:48,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 18:46:48,039 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:46:48,039 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:46:48,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2022-03-01 18:46:48,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:46:48,256 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:46:48,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:46:48,256 INFO L85 PathProgramCache]: Analyzing trace with hash -2096591479, now seen corresponding path program 99 times [2022-03-01 18:46:48,256 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:46:48,256 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977869852] [2022-03-01 18:46:48,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:46:48,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:46:48,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:46:48,574 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:46:48,574 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:46:48,574 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977869852] [2022-03-01 18:46:48,574 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977869852] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:46:48,575 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091928895] [2022-03-01 18:46:48,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:46:48,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:46:48,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:46:48,576 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:46:48,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-03-01 18:46:48,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:46:48,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:46:48,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 18:46:48,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:46:48,779 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-01 18:46:48,823 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-03-01 18:46:48,823 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-03-01 18:46:48,900 INFO L353 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2022-03-01 18:46:48,901 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2022-03-01 18:46:49,131 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-01 18:46:49,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:46:49,250 INFO L353 Elim1Store]: treesize reduction 15, result has 69.4 percent of original size [2022-03-01 18:46:49,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 22 treesize of output 48 [2022-03-01 18:46:49,536 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-01 18:46:49,536 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091928895] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:46:49,536 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:46:49,536 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 36 [2022-03-01 18:46:49,536 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567333134] [2022-03-01 18:46:49,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:46:49,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-01 18:46:49,537 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:46:49,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-01 18:46:49,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1077, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 18:46:49,538 INFO L87 Difference]: Start difference. First operand 32162 states and 125028 transitions. Second operand has 36 states, 36 states have (on average 2.3055555555555554) internal successors, (83), 36 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:46:53,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:46:53,949 INFO L93 Difference]: Finished difference Result 51087 states and 189656 transitions. [2022-03-01 18:46:53,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-03-01 18:46:53,950 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.3055555555555554) internal successors, (83), 36 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-01 18:46:53,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:46:54,153 INFO L225 Difference]: With dead ends: 51087 [2022-03-01 18:46:54,153 INFO L226 Difference]: Without dead ends: 51041 [2022-03-01 18:46:54,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4348 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1764, Invalid=11576, Unknown=0, NotChecked=0, Total=13340 [2022-03-01 18:46:54,154 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 684 mSDsluCounter, 1022 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 684 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 2790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1797 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:46:54,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [684 Valid, 571 Invalid, 2790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 873 Invalid, 0 Unknown, 1797 Unchecked, 0.5s Time] [2022-03-01 18:46:54,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51041 states. [2022-03-01 18:46:55,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51041 to 32917. [2022-03-01 18:46:55,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32917 states, 32916 states have (on average 3.8803013731923683) internal successors, (127724), 32916 states have internal predecessors, (127724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:46:55,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32917 states to 32917 states and 127724 transitions. [2022-03-01 18:46:55,470 INFO L78 Accepts]: Start accepts. Automaton has 32917 states and 127724 transitions. Word has length 32 [2022-03-01 18:46:55,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:46:55,470 INFO L470 AbstractCegarLoop]: Abstraction has 32917 states and 127724 transitions. [2022-03-01 18:46:55,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.3055555555555554) internal successors, (83), 36 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:46:55,470 INFO L276 IsEmpty]: Start isEmpty. Operand 32917 states and 127724 transitions. [2022-03-01 18:46:55,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 18:46:55,541 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:46:55,541 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:46:55,557 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2022-03-01 18:46:55,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2022-03-01 18:46:55,755 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:46:55,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:46:55,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1339985849, now seen corresponding path program 34 times [2022-03-01 18:46:55,756 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:46:55,756 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447313890] [2022-03-01 18:46:55,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:46:55,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:46:55,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:46:56,147 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:46:56,147 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:46:56,147 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447313890] [2022-03-01 18:46:56,148 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447313890] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:46:56,148 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642259929] [2022-03-01 18:46:56,148 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:46:56,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:46:56,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:46:56,149 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:46:56,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-03-01 18:46:56,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:46:56,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:46:56,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-01 18:46:56,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:46:56,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-01 18:46:56,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:46:56,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-03-01 18:46:56,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:46:56,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:46:56,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:46:56,684 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 36 [2022-03-01 18:46:56,769 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:46:56,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:46:56,868 INFO L353 Elim1Store]: treesize reduction 47, result has 23.0 percent of original size [2022-03-01 18:46:56,868 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 32 [2022-03-01 18:46:57,345 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:46:57,345 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642259929] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:46:57,345 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:46:57,345 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 38 [2022-03-01 18:46:57,346 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952806508] [2022-03-01 18:46:57,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:46:57,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-01 18:46:57,346 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:46:57,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-01 18:46:57,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1298, Unknown=0, NotChecked=0, Total=1482 [2022-03-01 18:46:57,346 INFO L87 Difference]: Start difference. First operand 32917 states and 127724 transitions. Second operand has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:47:06,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:47:06,220 INFO L93 Difference]: Finished difference Result 55582 states and 207677 transitions. [2022-03-01 18:47:06,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2022-03-01 18:47:06,220 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-01 18:47:06,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:47:06,431 INFO L225 Difference]: With dead ends: 55582 [2022-03-01 18:47:06,431 INFO L226 Difference]: Without dead ends: 55484 [2022-03-01 18:47:06,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10943 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=4217, Invalid=26233, Unknown=0, NotChecked=0, Total=30450 [2022-03-01 18:47:06,433 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 782 mSDsluCounter, 1201 mSDsCounter, 0 mSdLazyCounter, 2554 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 782 SdHoareTripleChecker+Valid, 605 SdHoareTripleChecker+Invalid, 2899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 2554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:47:06,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [782 Valid, 605 Invalid, 2899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 2554 Invalid, 0 Unknown, 118 Unchecked, 1.3s Time] [2022-03-01 18:47:06,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55484 states. [2022-03-01 18:47:07,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55484 to 32935. [2022-03-01 18:47:07,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32935 states, 32934 states have (on average 3.8810955243820975) internal successors, (127820), 32934 states have internal predecessors, (127820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:47:07,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32935 states to 32935 states and 127820 transitions. [2022-03-01 18:47:07,608 INFO L78 Accepts]: Start accepts. Automaton has 32935 states and 127820 transitions. Word has length 32 [2022-03-01 18:47:07,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:47:07,608 INFO L470 AbstractCegarLoop]: Abstraction has 32935 states and 127820 transitions. [2022-03-01 18:47:07,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:47:07,608 INFO L276 IsEmpty]: Start isEmpty. Operand 32935 states and 127820 transitions. [2022-03-01 18:47:07,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 18:47:07,829 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:47:07,829 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:47:07,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2022-03-01 18:47:08,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-03-01 18:47:08,045 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:47:08,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:47:08,046 INFO L85 PathProgramCache]: Analyzing trace with hash 366106637, now seen corresponding path program 100 times [2022-03-01 18:47:08,046 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:47:08,046 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814237372] [2022-03-01 18:47:08,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:47:08,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:47:08,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:47:08,451 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:47:08,451 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:47:08,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814237372] [2022-03-01 18:47:08,451 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814237372] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:47:08,452 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304721338] [2022-03-01 18:47:08,452 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:47:08,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:47:08,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:47:08,453 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:47:08,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-03-01 18:47:08,511 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:47:08,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:47:08,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:47:08,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:47:08,704 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:47:08,782 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-03-01 18:47:08,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:47:08,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:47:08,818 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 28 [2022-03-01 18:47:08,910 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:47:08,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:47:08,978 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:47:08,984 INFO L353 Elim1Store]: treesize reduction 10, result has 47.4 percent of original size [2022-03-01 18:47:08,984 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 22 [2022-03-01 18:47:09,282 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:47:09,282 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304721338] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:47:09,282 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:47:09,282 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2022-03-01 18:47:09,282 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469429596] [2022-03-01 18:47:09,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:47:09,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-01 18:47:09,282 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:47:09,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-01 18:47:09,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=1062, Unknown=0, NotChecked=0, Total=1332 [2022-03-01 18:47:09,283 INFO L87 Difference]: Start difference. First operand 32935 states and 127820 transitions. Second operand has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:47:15,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:47:15,318 INFO L93 Difference]: Finished difference Result 42801 states and 159961 transitions. [2022-03-01 18:47:15,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-03-01 18:47:15,319 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-01 18:47:15,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:47:15,438 INFO L225 Difference]: With dead ends: 42801 [2022-03-01 18:47:15,439 INFO L226 Difference]: Without dead ends: 42466 [2022-03-01 18:47:15,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6326 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=3264, Invalid=12992, Unknown=0, NotChecked=0, Total=16256 [2022-03-01 18:47:15,439 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 1308 mSDsluCounter, 772 mSDsCounter, 0 mSdLazyCounter, 1540 mSolverCounterSat, 455 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1308 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 2163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 455 IncrementalHoareTripleChecker+Valid, 1540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 168 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 18:47:15,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1308 Valid, 427 Invalid, 2163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [455 Valid, 1540 Invalid, 0 Unknown, 168 Unchecked, 0.9s Time] [2022-03-01 18:47:15,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42466 states. [2022-03-01 18:47:16,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42466 to 33169. [2022-03-01 18:47:16,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33169 states, 33168 states have (on average 3.879492281717318) internal successors, (128675), 33168 states have internal predecessors, (128675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:47:16,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33169 states to 33169 states and 128675 transitions. [2022-03-01 18:47:16,360 INFO L78 Accepts]: Start accepts. Automaton has 33169 states and 128675 transitions. Word has length 32 [2022-03-01 18:47:16,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:47:16,360 INFO L470 AbstractCegarLoop]: Abstraction has 33169 states and 128675 transitions. [2022-03-01 18:47:16,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:47:16,360 INFO L276 IsEmpty]: Start isEmpty. Operand 33169 states and 128675 transitions. [2022-03-01 18:47:16,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 18:47:16,423 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:47:16,423 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:47:16,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2022-03-01 18:47:16,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-03-01 18:47:16,625 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:47:16,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:47:16,625 INFO L85 PathProgramCache]: Analyzing trace with hash -685972535, now seen corresponding path program 101 times [2022-03-01 18:47:16,625 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:47:16,625 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886445911] [2022-03-01 18:47:16,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:47:16,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:47:16,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:47:17,166 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:47:17,166 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:47:17,166 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886445911] [2022-03-01 18:47:17,166 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886445911] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:47:17,166 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400605453] [2022-03-01 18:47:17,166 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:47:17,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:47:17,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:47:17,168 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:47:17,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-03-01 18:47:17,272 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 18:47:17,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:47:17,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 18:47:17,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:47:17,407 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:47:17,516 INFO L353 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2022-03-01 18:47:17,516 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2022-03-01 18:47:17,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:47:17,692 INFO L353 Elim1Store]: treesize reduction 27, result has 15.6 percent of original size [2022-03-01 18:47:17,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 32 [2022-03-01 18:47:17,924 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:47:17,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:47:18,122 INFO L353 Elim1Store]: treesize reduction 25, result has 54.5 percent of original size [2022-03-01 18:47:18,122 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 46 [2022-03-01 18:47:18,413 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:47:18,413 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400605453] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:47:18,413 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:47:18,413 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 38 [2022-03-01 18:47:18,413 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98877395] [2022-03-01 18:47:18,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:47:18,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-01 18:47:18,414 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:47:18,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-01 18:47:18,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1230, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 18:47:18,414 INFO L87 Difference]: Start difference. First operand 33169 states and 128675 transitions. Second operand has 38 states, 38 states have (on average 2.236842105263158) 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) [2022-03-01 18:47:41,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:47:41,001 INFO L93 Difference]: Finished difference Result 91641 states and 338994 transitions. [2022-03-01 18:47:41,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 288 states. [2022-03-01 18:47:41,002 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.236842105263158) 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 32 [2022-03-01 18:47:41,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:47:41,318 INFO L225 Difference]: With dead ends: 91641 [2022-03-01 18:47:41,318 INFO L226 Difference]: Without dead ends: 90983 [2022-03-01 18:47:41,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 309 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42460 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=9928, Invalid=86482, Unknown=0, NotChecked=0, Total=96410 [2022-03-01 18:47:41,321 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 1668 mSDsluCounter, 2176 mSDsCounter, 0 mSdLazyCounter, 2430 mSolverCounterSat, 346 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1668 SdHoareTripleChecker+Valid, 1074 SdHoareTripleChecker+Invalid, 4856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 346 IncrementalHoareTripleChecker+Valid, 2430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2080 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:47:41,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1668 Valid, 1074 Invalid, 4856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [346 Valid, 2430 Invalid, 0 Unknown, 2080 Unchecked, 1.5s Time] [2022-03-01 18:47:41,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90983 states. [2022-03-01 18:47:43,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90983 to 34783. [2022-03-01 18:47:43,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34783 states, 34782 states have (on average 3.8822379391639354) internal successors, (135032), 34782 states have internal predecessors, (135032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:47:43,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34783 states to 34783 states and 135032 transitions. [2022-03-01 18:47:43,168 INFO L78 Accepts]: Start accepts. Automaton has 34783 states and 135032 transitions. Word has length 32 [2022-03-01 18:47:43,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:47:43,168 INFO L470 AbstractCegarLoop]: Abstraction has 34783 states and 135032 transitions. [2022-03-01 18:47:43,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.236842105263158) 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) [2022-03-01 18:47:43,169 INFO L276 IsEmpty]: Start isEmpty. Operand 34783 states and 135032 transitions. [2022-03-01 18:47:43,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 18:47:43,243 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:47:43,243 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:47:43,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2022-03-01 18:47:43,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-03-01 18:47:43,459 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:47:43,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:47:43,459 INFO L85 PathProgramCache]: Analyzing trace with hash -2010400627, now seen corresponding path program 102 times [2022-03-01 18:47:43,459 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:47:43,459 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628935339] [2022-03-01 18:47:43,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:47:43,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:47:43,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:47:43,773 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:47:43,773 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:47:43,773 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628935339] [2022-03-01 18:47:43,773 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628935339] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:47:43,773 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509244755] [2022-03-01 18:47:43,773 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:47:43,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:47:43,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:47:43,775 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:47:43,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-03-01 18:47:43,852 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 18:47:43,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:47:43,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 18:47:43,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:47:43,961 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-01 18:47:44,012 INFO L353 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-03-01 18:47:44,013 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2022-03-01 18:47:44,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:47:44,068 INFO L353 Elim1Store]: treesize reduction 27, result has 15.6 percent of original size [2022-03-01 18:47:44,068 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 32 [2022-03-01 18:47:44,197 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:47:44,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:47:44,359 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-03-01 18:47:44,359 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 26 [2022-03-01 18:47:44,791 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:47:44,791 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509244755] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:47:44,791 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:47:44,791 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 36 [2022-03-01 18:47:44,791 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997018687] [2022-03-01 18:47:44,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:47:44,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-01 18:47:44,791 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:47:44,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-01 18:47:44,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1104, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 18:47:44,792 INFO L87 Difference]: Start difference. First operand 34783 states and 135032 transitions. Second operand has 36 states, 36 states have (on average 2.2222222222222223) 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) [2022-03-01 18:47:57,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:47:57,435 INFO L93 Difference]: Finished difference Result 64848 states and 238958 transitions. [2022-03-01 18:47:57,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2022-03-01 18:47:57,437 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.2222222222222223) 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 32 [2022-03-01 18:47:57,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:47:57,662 INFO L225 Difference]: With dead ends: 64848 [2022-03-01 18:47:57,662 INFO L226 Difference]: Without dead ends: 64717 [2022-03-01 18:47:57,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 51 SyntacticMatches, 5 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13417 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=3375, Invalid=31035, Unknown=0, NotChecked=0, Total=34410 [2022-03-01 18:47:57,663 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 1024 mSDsluCounter, 2280 mSDsCounter, 0 mSdLazyCounter, 3223 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1024 SdHoareTripleChecker+Valid, 1363 SdHoareTripleChecker+Invalid, 4653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 3223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1198 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:47:57,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1024 Valid, 1363 Invalid, 4653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 3223 Invalid, 0 Unknown, 1198 Unchecked, 1.6s Time] [2022-03-01 18:47:57,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64717 states. [2022-03-01 18:47:58,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64717 to 35391. [2022-03-01 18:47:58,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35391 states, 35390 states have (on average 3.882961288499576) internal successors, (137418), 35390 states have internal predecessors, (137418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:47:59,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35391 states to 35391 states and 137418 transitions. [2022-03-01 18:47:59,225 INFO L78 Accepts]: Start accepts. Automaton has 35391 states and 137418 transitions. Word has length 32 [2022-03-01 18:47:59,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:47:59,226 INFO L470 AbstractCegarLoop]: Abstraction has 35391 states and 137418 transitions. [2022-03-01 18:47:59,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.2222222222222223) 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) [2022-03-01 18:47:59,226 INFO L276 IsEmpty]: Start isEmpty. Operand 35391 states and 137418 transitions. [2022-03-01 18:47:59,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 18:47:59,319 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:47:59,320 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:47:59,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Forceful destruction successful, exit code 0 [2022-03-01 18:47:59,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:47:59,536 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:47:59,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:47:59,536 INFO L85 PathProgramCache]: Analyzing trace with hash 547803717, now seen corresponding path program 103 times [2022-03-01 18:47:59,536 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:47:59,536 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006460298] [2022-03-01 18:47:59,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:47:59,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:47:59,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:48:00,020 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:48:00,020 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:48:00,020 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006460298] [2022-03-01 18:48:00,020 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006460298] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:48:00,020 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314574757] [2022-03-01 18:48:00,020 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:48:00,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:48:00,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:48:00,021 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:48:00,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-03-01 18:48:00,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:48:00,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:48:00,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:48:00,243 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:48:00,302 INFO L353 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2022-03-01 18:48:00,303 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2022-03-01 18:48:00,393 INFO L353 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-03-01 18:48:00,393 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2022-03-01 18:48:00,450 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:48:00,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:48:00,540 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-03-01 18:48:00,540 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 26 [2022-03-01 18:48:00,801 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:48:00,801 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314574757] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:48:00,801 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:48:00,801 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2022-03-01 18:48:00,801 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235985469] [2022-03-01 18:48:00,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:48:00,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-01 18:48:00,802 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:48:00,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-01 18:48:00,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1156, Unknown=0, NotChecked=0, Total=1332 [2022-03-01 18:48:00,802 INFO L87 Difference]: Start difference. First operand 35391 states and 137418 transitions. Second operand has 37 states, 37 states have (on average 2.27027027027027) internal successors, (84), 37 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:48:20,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:48:20,206 INFO L93 Difference]: Finished difference Result 51787 states and 191524 transitions. [2022-03-01 18:48:20,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2022-03-01 18:48:20,206 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.27027027027027) internal successors, (84), 37 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-01 18:48:20,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:48:20,399 INFO L225 Difference]: With dead ends: 51787 [2022-03-01 18:48:20,399 INFO L226 Difference]: Without dead ends: 51476 [2022-03-01 18:48:20,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21081 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=6885, Invalid=44417, Unknown=0, NotChecked=0, Total=51302 [2022-03-01 18:48:20,401 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 1314 mSDsluCounter, 1291 mSDsCounter, 0 mSdLazyCounter, 2315 mSolverCounterSat, 364 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1314 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 3258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 364 IncrementalHoareTripleChecker+Valid, 2315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 579 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:48:20,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1314 Valid, 665 Invalid, 3258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [364 Valid, 2315 Invalid, 0 Unknown, 579 Unchecked, 1.5s Time] [2022-03-01 18:48:20,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51476 states. [2022-03-01 18:48:21,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51476 to 35455. [2022-03-01 18:48:21,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35455 states, 35454 states have (on average 3.8850341287301857) internal successors, (137740), 35454 states have internal predecessors, (137740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:48:21,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35455 states to 35455 states and 137740 transitions. [2022-03-01 18:48:21,730 INFO L78 Accepts]: Start accepts. Automaton has 35455 states and 137740 transitions. Word has length 32 [2022-03-01 18:48:21,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:48:21,730 INFO L470 AbstractCegarLoop]: Abstraction has 35455 states and 137740 transitions. [2022-03-01 18:48:21,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.27027027027027) internal successors, (84), 37 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:48:21,730 INFO L276 IsEmpty]: Start isEmpty. Operand 35455 states and 137740 transitions. [2022-03-01 18:48:21,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 18:48:21,806 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:48:21,806 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:48:21,822 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2022-03-01 18:48:22,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2022-03-01 18:48:22,008 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:48:22,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:48:22,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1291597695, now seen corresponding path program 104 times [2022-03-01 18:48:22,009 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:48:22,009 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393133031] [2022-03-01 18:48:22,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:48:22,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:48:22,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:48:22,406 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:48:22,407 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:48:22,407 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393133031] [2022-03-01 18:48:22,407 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393133031] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:48:22,407 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753415362] [2022-03-01 18:48:22,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:48:22,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:48:22,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:48:22,408 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:48:22,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-03-01 18:48:22,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:48:22,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:48:22,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:48:22,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:48:22,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-01 18:48:22,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:48:22,731 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-03-01 18:48:22,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:48:22,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:48:22,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:48:22,767 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 32 [2022-03-01 18:48:22,874 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:48:22,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:48:22,986 INFO L353 Elim1Store]: treesize reduction 25, result has 54.5 percent of original size [2022-03-01 18:48:22,986 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 46 [2022-03-01 18:48:23,293 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:48:23,294 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753415362] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:48:23,294 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:48:23,294 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 41 [2022-03-01 18:48:23,294 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991940479] [2022-03-01 18:48:23,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:48:23,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-01 18:48:23,294 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:48:23,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-01 18:48:23,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1449, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 18:48:23,295 INFO L87 Difference]: Start difference. First operand 35455 states and 137740 transitions. Second operand has 41 states, 41 states have (on average 2.073170731707317) internal successors, (85), 41 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) [2022-03-01 18:49:00,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:49:00,517 INFO L93 Difference]: Finished difference Result 52844 states and 195507 transitions. [2022-03-01 18:49:00,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 382 states. [2022-03-01 18:49:00,517 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.073170731707317) internal successors, (85), 41 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 32 [2022-03-01 18:49:00,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:49:00,702 INFO L225 Difference]: With dead ends: 52844 [2022-03-01 18:49:00,703 INFO L226 Difference]: Without dead ends: 52586 [2022-03-01 18:49:00,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 399 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70803 ImplicationChecksByTransitivity, 34.4s TimeCoverageRelationStatistics Valid=14658, Invalid=145742, Unknown=0, NotChecked=0, Total=160400 [2022-03-01 18:49:00,708 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 1925 mSDsluCounter, 2652 mSDsCounter, 0 mSdLazyCounter, 4933 mSolverCounterSat, 535 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1925 SdHoareTripleChecker+Valid, 1291 SdHoareTripleChecker+Invalid, 5579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 535 IncrementalHoareTripleChecker+Valid, 4933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-03-01 18:49:00,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1925 Valid, 1291 Invalid, 5579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [535 Valid, 4933 Invalid, 0 Unknown, 111 Unchecked, 2.8s Time] [2022-03-01 18:49:00,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52586 states. [2022-03-01 18:49:01,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52586 to 36099. [2022-03-01 18:49:01,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36099 states, 36098 states have (on average 3.8800764585295586) internal successors, (140063), 36098 states have internal predecessors, (140063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:49:01,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36099 states to 36099 states and 140063 transitions. [2022-03-01 18:49:01,951 INFO L78 Accepts]: Start accepts. Automaton has 36099 states and 140063 transitions. Word has length 32 [2022-03-01 18:49:01,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:49:01,951 INFO L470 AbstractCegarLoop]: Abstraction has 36099 states and 140063 transitions. [2022-03-01 18:49:01,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.073170731707317) internal successors, (85), 41 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) [2022-03-01 18:49:01,951 INFO L276 IsEmpty]: Start isEmpty. Operand 36099 states and 140063 transitions. [2022-03-01 18:49:02,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 18:49:02,027 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:49:02,028 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:49:02,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2022-03-01 18:49:02,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2022-03-01 18:49:02,244 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:49:02,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:49:02,244 INFO L85 PathProgramCache]: Analyzing trace with hash -776819403, now seen corresponding path program 105 times [2022-03-01 18:49:02,244 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:49:02,244 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91000710] [2022-03-01 18:49:02,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:49:02,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:49:02,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:49:02,611 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:49:02,612 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:49:02,612 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91000710] [2022-03-01 18:49:02,612 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91000710] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:49:02,612 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098308896] [2022-03-01 18:49:02,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:49:02,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:49:02,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:49:02,613 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:49:02,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-03-01 18:49:02,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:49:02,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:49:02,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 18:49:02,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:49:02,828 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-01 18:49:02,902 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-03-01 18:49:02,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-03-01 18:49:02,965 INFO L353 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2022-03-01 18:49:02,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2022-03-01 18:49:03,177 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 18:49:03,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:49:03,302 INFO L353 Elim1Store]: treesize reduction 15, result has 69.4 percent of original size [2022-03-01 18:49:03,302 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 22 treesize of output 48 [2022-03-01 18:49:03,538 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 18:49:03,538 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098308896] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:49:03,538 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:49:03,539 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 32 [2022-03-01 18:49:03,539 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528032550] [2022-03-01 18:49:03,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:49:03,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 18:49:03,539 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:49:03,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 18:49:03,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=840, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:49:03,539 INFO L87 Difference]: Start difference. First operand 36099 states and 140063 transitions. Second operand has 32 states, 32 states have (on average 2.46875) internal successors, (79), 32 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) [2022-03-01 18:49:12,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:49:12,300 INFO L93 Difference]: Finished difference Result 102620 states and 385220 transitions. [2022-03-01 18:49:12,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2022-03-01 18:49:12,301 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 32 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 32 [2022-03-01 18:49:12,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:49:12,741 INFO L225 Difference]: With dead ends: 102620 [2022-03-01 18:49:12,741 INFO L226 Difference]: Without dead ends: 102242 [2022-03-01 18:49:12,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14408 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=5681, Invalid=29101, Unknown=0, NotChecked=0, Total=34782 [2022-03-01 18:49:12,742 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 1050 mSDsluCounter, 1580 mSDsCounter, 0 mSdLazyCounter, 1322 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1050 SdHoareTripleChecker+Valid, 763 SdHoareTripleChecker+Invalid, 3436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 1322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1894 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:49:12,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1050 Valid, 763 Invalid, 3436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 1322 Invalid, 0 Unknown, 1894 Unchecked, 0.7s Time] [2022-03-01 18:49:13,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102242 states. [2022-03-01 18:49:14,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102242 to 38466. [2022-03-01 18:49:14,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38466 states, 38465 states have (on average 3.907344339009489) internal successors, (150296), 38465 states have internal predecessors, (150296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:49:14,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38466 states to 38466 states and 150296 transitions. [2022-03-01 18:49:14,866 INFO L78 Accepts]: Start accepts. Automaton has 38466 states and 150296 transitions. Word has length 32 [2022-03-01 18:49:14,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:49:14,866 INFO L470 AbstractCegarLoop]: Abstraction has 38466 states and 150296 transitions. [2022-03-01 18:49:14,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 32 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) [2022-03-01 18:49:14,867 INFO L276 IsEmpty]: Start isEmpty. Operand 38466 states and 150296 transitions. [2022-03-01 18:49:14,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 18:49:14,944 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:49:14,944 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:49:14,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2022-03-01 18:49:15,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:49:15,152 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:49:15,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:49:15,153 INFO L85 PathProgramCache]: Analyzing trace with hash 304198069, now seen corresponding path program 106 times [2022-03-01 18:49:15,153 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:49:15,153 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543965431] [2022-03-01 18:49:15,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:49:15,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:49:15,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:49:15,719 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:49:15,719 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:49:15,719 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543965431] [2022-03-01 18:49:15,719 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543965431] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:49:15,719 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235463648] [2022-03-01 18:49:15,719 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:49:15,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:49:15,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:49:15,734 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:49:15,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-03-01 18:49:15,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:49:15,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:49:15,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:49:15,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:49:15,973 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:49:16,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:49:16,066 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-03-01 18:49:16,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:49:16,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:49:16,103 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 28 [2022-03-01 18:49:16,192 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:49:16,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:49:16,303 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-03-01 18:49:16,303 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 26 [2022-03-01 18:49:16,642 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:49:16,643 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235463648] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:49:16,643 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:49:16,643 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2022-03-01 18:49:16,643 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249693014] [2022-03-01 18:49:16,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:49:16,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-01 18:49:16,643 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:49:16,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-01 18:49:16,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=1070, Unknown=0, NotChecked=0, Total=1332 [2022-03-01 18:49:16,643 INFO L87 Difference]: Start difference. First operand 38466 states and 150296 transitions. Second operand has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:49:28,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:49:28,171 INFO L93 Difference]: Finished difference Result 56723 states and 209267 transitions. [2022-03-01 18:49:28,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2022-03-01 18:49:28,172 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-01 18:49:28,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:49:28,371 INFO L225 Difference]: With dead ends: 56723 [2022-03-01 18:49:28,371 INFO L226 Difference]: Without dead ends: 56244 [2022-03-01 18:49:28,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11188 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=5132, Invalid=22590, Unknown=0, NotChecked=0, Total=27722 [2022-03-01 18:49:28,372 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 1240 mSDsluCounter, 1084 mSDsCounter, 0 mSdLazyCounter, 2022 mSolverCounterSat, 363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1240 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 2802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 363 IncrementalHoareTripleChecker+Valid, 2022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 417 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:49:28,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1240 Valid, 572 Invalid, 2802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [363 Valid, 2022 Invalid, 0 Unknown, 417 Unchecked, 1.3s Time] [2022-03-01 18:49:28,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56244 states. [2022-03-01 18:49:29,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56244 to 38432. [2022-03-01 18:49:29,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38432 states, 38431 states have (on average 3.9106190315110196) internal successors, (150289), 38431 states have internal predecessors, (150289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:49:29,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38432 states to 38432 states and 150289 transitions. [2022-03-01 18:49:29,759 INFO L78 Accepts]: Start accepts. Automaton has 38432 states and 150289 transitions. Word has length 32 [2022-03-01 18:49:29,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:49:29,760 INFO L470 AbstractCegarLoop]: Abstraction has 38432 states and 150289 transitions. [2022-03-01 18:49:29,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:49:29,760 INFO L276 IsEmpty]: Start isEmpty. Operand 38432 states and 150289 transitions. [2022-03-01 18:49:29,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 18:49:29,844 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:49:29,844 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:49:29,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Forceful destruction successful, exit code 0 [2022-03-01 18:49:30,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:49:30,055 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:49:30,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:49:30,056 INFO L85 PathProgramCache]: Analyzing trace with hash -432199035, now seen corresponding path program 107 times [2022-03-01 18:49:30,056 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:49:30,056 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980303222] [2022-03-01 18:49:30,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:49:30,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:49:30,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:49:30,424 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:49:30,424 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:49:30,424 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980303222] [2022-03-01 18:49:30,424 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980303222] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:49:30,424 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353948506] [2022-03-01 18:49:30,425 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:49:30,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:49:30,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:49:30,426 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:49:30,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-03-01 18:49:30,503 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 18:49:30,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:49:30,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:49:30,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:49:30,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-01 18:49:30,682 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-03-01 18:49:30,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:49:30,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:49:30,754 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 28 [2022-03-01 18:49:30,853 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:49:30,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:49:30,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:49:30,985 INFO L353 Elim1Store]: treesize reduction 15, result has 66.7 percent of original size [2022-03-01 18:49:30,985 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 46 [2022-03-01 18:49:31,486 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:49:31,487 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353948506] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:49:31,487 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:49:31,487 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 40 [2022-03-01 18:49:31,487 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574449770] [2022-03-01 18:49:31,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:49:31,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-01 18:49:31,487 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:49:31,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-01 18:49:31,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1327, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 18:49:31,488 INFO L87 Difference]: Start difference. First operand 38432 states and 150289 transitions. Second operand has 40 states, 40 states have (on average 2.125) internal successors, (85), 40 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) [2022-03-01 18:49:41,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:49:41,683 INFO L93 Difference]: Finished difference Result 52386 states and 197704 transitions. [2022-03-01 18:49:41,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2022-03-01 18:49:41,684 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 40 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 32 [2022-03-01 18:49:41,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:49:41,859 INFO L225 Difference]: With dead ends: 52386 [2022-03-01 18:49:41,859 INFO L226 Difference]: Without dead ends: 51723 [2022-03-01 18:49:41,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12292 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=5432, Invalid=26074, Unknown=0, NotChecked=0, Total=31506 [2022-03-01 18:49:41,860 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 1346 mSDsluCounter, 1304 mSDsCounter, 0 mSdLazyCounter, 2912 mSolverCounterSat, 485 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1346 SdHoareTripleChecker+Valid, 679 SdHoareTripleChecker+Invalid, 3510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 485 IncrementalHoareTripleChecker+Valid, 2912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:49:41,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1346 Valid, 679 Invalid, 3510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [485 Valid, 2912 Invalid, 0 Unknown, 113 Unchecked, 1.6s Time] [2022-03-01 18:49:41,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51723 states. [2022-03-01 18:49:42,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51723 to 38501. [2022-03-01 18:49:43,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38501 states, 38500 states have (on average 3.9126233766233764) internal successors, (150636), 38500 states have internal predecessors, (150636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:49:43,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38501 states to 38501 states and 150636 transitions. [2022-03-01 18:49:43,152 INFO L78 Accepts]: Start accepts. Automaton has 38501 states and 150636 transitions. Word has length 32 [2022-03-01 18:49:43,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:49:43,153 INFO L470 AbstractCegarLoop]: Abstraction has 38501 states and 150636 transitions. [2022-03-01 18:49:43,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 40 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) [2022-03-01 18:49:43,153 INFO L276 IsEmpty]: Start isEmpty. Operand 38501 states and 150636 transitions. [2022-03-01 18:49:43,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 18:49:43,230 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:49:43,230 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:49:43,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Forceful destruction successful, exit code 0 [2022-03-01 18:49:43,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:49:43,446 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:49:43,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:49:43,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1691205311, now seen corresponding path program 108 times [2022-03-01 18:49:43,446 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:49:43,446 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447337547] [2022-03-01 18:49:43,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:49:43,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:49:43,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:49:43,793 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:49:43,793 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:49:43,793 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447337547] [2022-03-01 18:49:43,793 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447337547] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:49:43,793 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515935233] [2022-03-01 18:49:43,794 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:49:43,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:49:43,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:49:43,795 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:49:43,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-03-01 18:49:44,024 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 18:49:44,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:49:44,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 18:49:44,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:49:44,141 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-01 18:49:44,169 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-03-01 18:49:44,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-03-01 18:49:44,218 INFO L353 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2022-03-01 18:49:44,219 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2022-03-01 18:49:44,417 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 18:49:44,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:49:44,529 INFO L353 Elim1Store]: treesize reduction 15, result has 69.4 percent of original size [2022-03-01 18:49:44,530 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 22 treesize of output 48 [2022-03-01 18:49:44,797 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 18:49:44,797 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515935233] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:49:44,797 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:49:44,797 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 32 [2022-03-01 18:49:44,797 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232920663] [2022-03-01 18:49:44,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:49:44,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 18:49:44,798 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:49:44,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 18:49:44,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=841, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:49:44,798 INFO L87 Difference]: Start difference. First operand 38501 states and 150636 transitions. Second operand has 32 states, 32 states have (on average 2.4375) 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) [2022-03-01 18:49:58,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:49:58,875 INFO L93 Difference]: Finished difference Result 137132 states and 508942 transitions. [2022-03-01 18:49:58,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 223 states. [2022-03-01 18:49:58,875 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.4375) 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 32 [2022-03-01 18:49:58,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:49:59,801 INFO L225 Difference]: With dead ends: 137132 [2022-03-01 18:49:59,801 INFO L226 Difference]: Without dead ends: 136805 [2022-03-01 18:49:59,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 79 SyntacticMatches, 39 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27049 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=8097, Invalid=50225, Unknown=0, NotChecked=0, Total=58322 [2022-03-01 18:49:59,803 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 971 mSDsluCounter, 1438 mSDsCounter, 0 mSdLazyCounter, 1920 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 971 SdHoareTripleChecker+Valid, 953 SdHoareTripleChecker+Invalid, 3696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 1920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1541 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:49:59,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [971 Valid, 953 Invalid, 3696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 1920 Invalid, 0 Unknown, 1541 Unchecked, 1.2s Time] [2022-03-01 18:49:59,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136805 states. [2022-03-01 18:50:02,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136805 to 39413. [2022-03-01 18:50:02,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39413 states, 39412 states have (on average 3.917613924692987) internal successors, (154401), 39412 states have internal predecessors, (154401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:50:02,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39413 states to 39413 states and 154401 transitions. [2022-03-01 18:50:02,759 INFO L78 Accepts]: Start accepts. Automaton has 39413 states and 154401 transitions. Word has length 32 [2022-03-01 18:50:02,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:50:02,759 INFO L470 AbstractCegarLoop]: Abstraction has 39413 states and 154401 transitions. [2022-03-01 18:50:02,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.4375) 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) [2022-03-01 18:50:02,759 INFO L276 IsEmpty]: Start isEmpty. Operand 39413 states and 154401 transitions. [2022-03-01 18:50:02,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 18:50:02,854 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:50:02,854 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:50:02,871 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2022-03-01 18:50:03,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2022-03-01 18:50:03,067 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:50:03,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:50:03,068 INFO L85 PathProgramCache]: Analyzing trace with hash 2091579829, now seen corresponding path program 109 times [2022-03-01 18:50:03,068 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:50:03,068 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542455443] [2022-03-01 18:50:03,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:50:03,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:50:03,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:50:03,512 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:50:03,512 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:50:03,512 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542455443] [2022-03-01 18:50:03,512 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542455443] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:50:03,512 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238977535] [2022-03-01 18:50:03,513 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:50:03,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:50:03,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:50:03,514 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:50:03,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-03-01 18:50:03,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:50:03,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:50:03,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:50:03,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:50:04,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:50:04,062 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-03-01 18:50:04,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:50:04,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:50:04,164 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 28 [2022-03-01 18:50:04,280 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:50:04,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:50:04,363 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-03-01 18:50:04,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 26 [2022-03-01 18:50:04,617 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:50:04,618 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238977535] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:50:04,618 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:50:04,618 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 36 [2022-03-01 18:50:04,618 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539212917] [2022-03-01 18:50:04,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:50:04,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-01 18:50:04,618 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:50:04,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-01 18:50:04,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1006, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 18:50:04,619 INFO L87 Difference]: Start difference. First operand 39413 states and 154401 transitions. Second operand has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 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) [2022-03-01 18:50:16,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:50:16,057 INFO L93 Difference]: Finished difference Result 57731 states and 213688 transitions. [2022-03-01 18:50:16,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2022-03-01 18:50:16,058 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 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 32 [2022-03-01 18:50:16,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:50:16,283 INFO L225 Difference]: With dead ends: 57731 [2022-03-01 18:50:16,283 INFO L226 Difference]: Without dead ends: 57320 [2022-03-01 18:50:16,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11860 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=5415, Invalid=23315, Unknown=0, NotChecked=0, Total=28730 [2022-03-01 18:50:16,285 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 1111 mSDsluCounter, 1222 mSDsCounter, 0 mSdLazyCounter, 1910 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1111 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 3580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 1910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1383 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:50:16,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1111 Valid, 636 Invalid, 3580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 1910 Invalid, 0 Unknown, 1383 Unchecked, 1.2s Time] [2022-03-01 18:50:16,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57320 states. [2022-03-01 18:50:17,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57320 to 39513. [2022-03-01 18:50:17,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39513 states, 39512 states have (on average 3.9168100830127557) internal successors, (154761), 39512 states have internal predecessors, (154761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:50:17,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39513 states to 39513 states and 154761 transitions. [2022-03-01 18:50:17,886 INFO L78 Accepts]: Start accepts. Automaton has 39513 states and 154761 transitions. Word has length 32 [2022-03-01 18:50:17,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:50:17,886 INFO L470 AbstractCegarLoop]: Abstraction has 39513 states and 154761 transitions. [2022-03-01 18:50:17,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 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) [2022-03-01 18:50:17,886 INFO L276 IsEmpty]: Start isEmpty. Operand 39513 states and 154761 transitions. [2022-03-01 18:50:17,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 18:50:17,976 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:50:17,977 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:50:17,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Forceful destruction successful, exit code 0 [2022-03-01 18:50:18,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2022-03-01 18:50:18,193 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:50:18,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:50:18,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1876184123, now seen corresponding path program 110 times [2022-03-01 18:50:18,193 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:50:18,193 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19497326] [2022-03-01 18:50:18,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:50:18,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:50:18,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:50:18,423 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:50:18,423 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:50:18,423 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19497326] [2022-03-01 18:50:18,423 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19497326] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:50:18,423 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667051245] [2022-03-01 18:50:18,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:50:18,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:50:18,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:50:18,424 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:50:18,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-03-01 18:50:18,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:50:18,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:50:18,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:50:18,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:50:18,802 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:50:18,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:50:18,858 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-03-01 18:50:18,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:50:18,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:50:18,888 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 28 [2022-03-01 18:50:19,023 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:50:19,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:50:19,093 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-03-01 18:50:19,093 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 26 [2022-03-01 18:50:19,340 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:50:19,341 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667051245] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:50:19,341 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:50:19,341 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 36 [2022-03-01 18:50:19,341 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474043647] [2022-03-01 18:50:19,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:50:19,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-01 18:50:19,341 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:50:19,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-01 18:50:19,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=1009, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 18:50:19,341 INFO L87 Difference]: Start difference. First operand 39513 states and 154761 transitions. Second operand has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 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) [2022-03-01 18:50:25,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:50:25,934 INFO L93 Difference]: Finished difference Result 55354 states and 208250 transitions. [2022-03-01 18:50:25,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-03-01 18:50:25,935 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 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 32 [2022-03-01 18:50:25,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:50:26,127 INFO L225 Difference]: With dead ends: 55354 [2022-03-01 18:50:26,127 INFO L226 Difference]: Without dead ends: 55210 [2022-03-01 18:50:26,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7906 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=3892, Invalid=15290, Unknown=0, NotChecked=0, Total=19182 [2022-03-01 18:50:26,128 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 965 mSDsluCounter, 1257 mSDsCounter, 0 mSdLazyCounter, 1581 mSolverCounterSat, 350 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 965 SdHoareTripleChecker+Valid, 627 SdHoareTripleChecker+Invalid, 3975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 350 IncrementalHoareTripleChecker+Valid, 1581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2044 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 18:50:26,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [965 Valid, 627 Invalid, 3975 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [350 Valid, 1581 Invalid, 0 Unknown, 2044 Unchecked, 0.9s Time] [2022-03-01 18:50:26,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55210 states. [2022-03-01 18:50:27,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55210 to 39510. [2022-03-01 18:50:27,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39510 states, 39509 states have (on average 3.917892125844744) internal successors, (154792), 39509 states have internal predecessors, (154792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:50:27,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39510 states to 39510 states and 154792 transitions. [2022-03-01 18:50:27,406 INFO L78 Accepts]: Start accepts. Automaton has 39510 states and 154792 transitions. Word has length 32 [2022-03-01 18:50:27,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:50:27,406 INFO L470 AbstractCegarLoop]: Abstraction has 39510 states and 154792 transitions. [2022-03-01 18:50:27,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 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) [2022-03-01 18:50:27,406 INFO L276 IsEmpty]: Start isEmpty. Operand 39510 states and 154792 transitions. [2022-03-01 18:50:27,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 18:50:27,483 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:50:27,483 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:50:27,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2022-03-01 18:50:27,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2022-03-01 18:50:27,689 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:50:27,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:50:27,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1870318149, now seen corresponding path program 111 times [2022-03-01 18:50:27,689 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:50:27,689 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220651812] [2022-03-01 18:50:27,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:50:27,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:50:27,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:50:28,046 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:50:28,046 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:50:28,046 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220651812] [2022-03-01 18:50:28,046 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220651812] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:50:28,046 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821469361] [2022-03-01 18:50:28,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:50:28,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:50:28,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:50:28,047 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:50:28,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-03-01 18:50:28,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:50:28,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:50:28,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 18:50:28,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:50:28,398 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:50:28,446 INFO L353 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2022-03-01 18:50:28,446 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2022-03-01 18:50:28,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:50:28,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:50:28,567 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 28 [2022-03-01 18:50:28,676 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 18:50:28,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:50:28,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:50:28,804 INFO L353 Elim1Store]: treesize reduction 15, result has 66.7 percent of original size [2022-03-01 18:50:28,804 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 46 [2022-03-01 18:50:28,971 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 18:50:28,971 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821469361] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:50:28,971 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:50:28,971 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 34 [2022-03-01 18:50:28,971 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946913638] [2022-03-01 18:50:28,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:50:28,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-01 18:50:28,972 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:50:28,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-01 18:50:28,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=952, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 18:50:28,972 INFO L87 Difference]: Start difference. First operand 39510 states and 154792 transitions. Second operand has 34 states, 34 states have (on average 2.323529411764706) 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) [2022-03-01 18:50:48,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:50:48,156 INFO L93 Difference]: Finished difference Result 64931 states and 242817 transitions. [2022-03-01 18:50:48,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 251 states. [2022-03-01 18:50:48,156 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.323529411764706) 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 32 [2022-03-01 18:50:48,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:50:48,369 INFO L225 Difference]: With dead ends: 64931 [2022-03-01 18:50:48,370 INFO L226 Difference]: Without dead ends: 64244 [2022-03-01 18:50:48,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34251 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=9447, Invalid=68115, Unknown=0, NotChecked=0, Total=77562 [2022-03-01 18:50:48,372 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 1991 mSDsluCounter, 1022 mSDsCounter, 0 mSdLazyCounter, 2475 mSolverCounterSat, 785 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1991 SdHoareTripleChecker+Valid, 612 SdHoareTripleChecker+Invalid, 3482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 785 IncrementalHoareTripleChecker+Valid, 2475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 222 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:50:48,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1991 Valid, 612 Invalid, 3482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [785 Valid, 2475 Invalid, 0 Unknown, 222 Unchecked, 1.7s Time] [2022-03-01 18:50:48,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64244 states. [2022-03-01 18:50:49,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64244 to 42777. [2022-03-01 18:50:49,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42777 states, 42776 states have (on average 3.9228305591920702) internal successors, (167803), 42776 states have internal predecessors, (167803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:50:49,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42777 states to 42777 states and 167803 transitions. [2022-03-01 18:50:49,926 INFO L78 Accepts]: Start accepts. Automaton has 42777 states and 167803 transitions. Word has length 32 [2022-03-01 18:50:49,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:50:49,926 INFO L470 AbstractCegarLoop]: Abstraction has 42777 states and 167803 transitions. [2022-03-01 18:50:49,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.323529411764706) 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) [2022-03-01 18:50:49,927 INFO L276 IsEmpty]: Start isEmpty. Operand 42777 states and 167803 transitions. [2022-03-01 18:50:50,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 18:50:50,008 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:50:50,009 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:50:50,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Forceful destruction successful, exit code 0 [2022-03-01 18:50:50,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:50:50,224 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:50:50,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:50:50,225 INFO L85 PathProgramCache]: Analyzing trace with hash 608356609, now seen corresponding path program 112 times [2022-03-01 18:50:50,225 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:50:50,225 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140723276] [2022-03-01 18:50:50,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:50:50,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:50:50,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:50:50,570 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:50:50,570 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:50:50,570 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140723276] [2022-03-01 18:50:50,571 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140723276] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:50:50,571 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020279108] [2022-03-01 18:50:50,571 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:50:50,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:50:50,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:50:50,572 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:50:50,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-03-01 18:50:50,650 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:50:50,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:50:50,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:50:50,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:50:50,868 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-01 18:50:50,922 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-03-01 18:50:50,922 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-03-01 18:50:50,968 INFO L353 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-03-01 18:50:50,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2022-03-01 18:50:51,126 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:50:51,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:50:51,227 INFO L353 Elim1Store]: treesize reduction 25, result has 54.5 percent of original size [2022-03-01 18:50:51,227 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 46 [2022-03-01 18:50:51,501 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:50:51,502 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020279108] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:50:51,502 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:50:51,502 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2022-03-01 18:50:51,502 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718133225] [2022-03-01 18:50:51,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:50:51,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-01 18:50:51,502 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:50:51,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-01 18:50:51,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1129, Unknown=0, NotChecked=0, Total=1332 [2022-03-01 18:50:51,502 INFO L87 Difference]: Start difference. First operand 42777 states and 167803 transitions. Second operand has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:50:58,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:50:58,428 INFO L93 Difference]: Finished difference Result 74886 states and 285697 transitions. [2022-03-01 18:50:58,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-03-01 18:50:58,429 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-01 18:50:58,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:50:58,711 INFO L225 Difference]: With dead ends: 74886 [2022-03-01 18:50:58,711 INFO L226 Difference]: Without dead ends: 74740 [2022-03-01 18:50:58,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9652 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=4568, Invalid=19612, Unknown=0, NotChecked=0, Total=24180 [2022-03-01 18:50:58,712 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 1141 mSDsluCounter, 1192 mSDsCounter, 0 mSdLazyCounter, 1247 mSolverCounterSat, 284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1141 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 3123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 284 IncrementalHoareTripleChecker+Valid, 1247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1592 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:50:58,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1141 Valid, 653 Invalid, 3123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [284 Valid, 1247 Invalid, 0 Unknown, 1592 Unchecked, 0.6s Time] [2022-03-01 18:50:58,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74740 states. [2022-03-01 18:51:00,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74740 to 42745. [2022-03-01 18:51:00,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42745 states, 42744 states have (on average 3.922842972113045) internal successors, (167678), 42744 states have internal predecessors, (167678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:51:00,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42745 states to 42745 states and 167678 transitions. [2022-03-01 18:51:00,683 INFO L78 Accepts]: Start accepts. Automaton has 42745 states and 167678 transitions. Word has length 32 [2022-03-01 18:51:00,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:51:00,683 INFO L470 AbstractCegarLoop]: Abstraction has 42745 states and 167678 transitions. [2022-03-01 18:51:00,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:51:00,683 INFO L276 IsEmpty]: Start isEmpty. Operand 42745 states and 167678 transitions. [2022-03-01 18:51:00,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 18:51:00,776 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:51:00,776 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:51:00,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Forceful destruction successful, exit code 0 [2022-03-01 18:51:00,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2022-03-01 18:51:00,992 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:51:00,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:51:00,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1916574215, now seen corresponding path program 113 times [2022-03-01 18:51:00,993 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:51:00,993 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844466864] [2022-03-01 18:51:00,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:51:00,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:51:00,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:51:01,395 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:51:01,395 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:51:01,396 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844466864] [2022-03-01 18:51:01,396 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844466864] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:51:01,396 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134261516] [2022-03-01 18:51:01,396 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:51:01,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:51:01,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:51:01,397 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:51:01,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-03-01 18:51:01,479 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 18:51:01,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:51:01,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-01 18:51:01,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:51:01,974 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-01 18:51:02,080 INFO L353 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-03-01 18:51:02,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2022-03-01 18:51:02,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:51:02,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:51:02,145 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 28 [2022-03-01 18:51:02,237 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:51:02,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:51:02,327 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:51:02,347 INFO L353 Elim1Store]: treesize reduction 15, result has 66.7 percent of original size [2022-03-01 18:51:02,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 46 [2022-03-01 18:51:02,716 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:51:02,716 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134261516] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:51:02,716 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:51:02,716 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 40 [2022-03-01 18:51:02,716 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457836396] [2022-03-01 18:51:02,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:51:02,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-01 18:51:02,716 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:51:02,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-01 18:51:02,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=1311, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 18:51:02,717 INFO L87 Difference]: Start difference. First operand 42745 states and 167678 transitions. Second operand has 40 states, 40 states have (on average 2.1) internal successors, (84), 40 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:51:17,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:51:17,744 INFO L93 Difference]: Finished difference Result 81857 states and 307215 transitions. [2022-03-01 18:51:17,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 258 states. [2022-03-01 18:51:17,744 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.1) internal successors, (84), 40 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-01 18:51:17,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:51:18,016 INFO L225 Difference]: With dead ends: 81857 [2022-03-01 18:51:18,017 INFO L226 Difference]: Without dead ends: 81799 [2022-03-01 18:51:18,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 49 SyntacticMatches, 18 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35516 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=13394, Invalid=62506, Unknown=0, NotChecked=0, Total=75900 [2022-03-01 18:51:18,019 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 1277 mSDsluCounter, 1598 mSDsCounter, 0 mSdLazyCounter, 1781 mSolverCounterSat, 436 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1277 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 4558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 436 IncrementalHoareTripleChecker+Valid, 1781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2341 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:51:18,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1277 Valid, 722 Invalid, 4558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [436 Valid, 1781 Invalid, 0 Unknown, 2341 Unchecked, 1.2s Time] [2022-03-01 18:51:18,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81799 states. [2022-03-01 18:51:19,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81799 to 45299. [2022-03-01 18:51:19,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45299 states, 45298 states have (on average 3.9278555344606825) internal successors, (177924), 45298 states have internal predecessors, (177924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:51:19,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45299 states to 45299 states and 177924 transitions. [2022-03-01 18:51:19,873 INFO L78 Accepts]: Start accepts. Automaton has 45299 states and 177924 transitions. Word has length 32 [2022-03-01 18:51:19,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:51:19,873 INFO L470 AbstractCegarLoop]: Abstraction has 45299 states and 177924 transitions. [2022-03-01 18:51:19,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.1) internal successors, (84), 40 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:51:19,874 INFO L276 IsEmpty]: Start isEmpty. Operand 45299 states and 177924 transitions. [2022-03-01 18:51:19,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 18:51:19,959 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:51:19,959 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:51:19,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Forceful destruction successful, exit code 0 [2022-03-01 18:51:20,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2022-03-01 18:51:20,175 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:51:20,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:51:20,176 INFO L85 PathProgramCache]: Analyzing trace with hash 381488527, now seen corresponding path program 114 times [2022-03-01 18:51:20,176 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:51:20,176 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156013378] [2022-03-01 18:51:20,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:51:20,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:51:20,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:51:20,496 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:51:20,496 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:51:20,496 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156013378] [2022-03-01 18:51:20,496 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156013378] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:51:20,496 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686047371] [2022-03-01 18:51:20,496 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:51:20,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:51:20,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:51:20,497 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:51:20,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-03-01 18:51:20,574 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:51:20,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:51:20,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-01 18:51:20,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:51:20,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-01 18:51:20,915 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-03-01 18:51:20,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-03-01 18:51:21,027 INFO L353 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2022-03-01 18:51:21,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2022-03-01 18:51:21,198 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 18:51:21,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:51:21,369 INFO L353 Elim1Store]: treesize reduction 15, result has 69.4 percent of original size [2022-03-01 18:51:21,369 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 22 treesize of output 48 [2022-03-01 18:51:21,617 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 18:51:21,617 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686047371] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:51:21,617 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:51:21,617 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-03-01 18:51:21,617 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514273001] [2022-03-01 18:51:21,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:51:21,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 18:51:21,618 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:51:21,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 18:51:21,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:51:21,618 INFO L87 Difference]: Start difference. First operand 45299 states and 177924 transitions. Second operand has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:51:23,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:51:23,280 INFO L93 Difference]: Finished difference Result 55889 states and 214095 transitions. [2022-03-01 18:51:23,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-01 18:51:23,281 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-01 18:51:23,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:51:23,478 INFO L225 Difference]: With dead ends: 55889 [2022-03-01 18:51:23,478 INFO L226 Difference]: Without dead ends: 55805 [2022-03-01 18:51:23,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 69 SyntacticMatches, 6 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1115 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=606, Invalid=3426, Unknown=0, NotChecked=0, Total=4032 [2022-03-01 18:51:23,479 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 369 mSDsluCounter, 723 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 1494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 934 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:51:23,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [369 Valid, 474 Invalid, 1494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 516 Invalid, 0 Unknown, 934 Unchecked, 0.3s Time] [2022-03-01 18:51:23,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55805 states. [2022-03-01 18:51:24,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55805 to 45472. [2022-03-01 18:51:24,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45472 states, 45471 states have (on average 3.926128741395615) internal successors, (178525), 45471 states have internal predecessors, (178525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:51:24,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45472 states to 45472 states and 178525 transitions. [2022-03-01 18:51:24,720 INFO L78 Accepts]: Start accepts. Automaton has 45472 states and 178525 transitions. Word has length 32 [2022-03-01 18:51:24,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:51:24,720 INFO L470 AbstractCegarLoop]: Abstraction has 45472 states and 178525 transitions. [2022-03-01 18:51:24,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:51:24,720 INFO L276 IsEmpty]: Start isEmpty. Operand 45472 states and 178525 transitions. [2022-03-01 18:51:24,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 18:51:24,808 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:51:24,808 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:51:24,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Forceful destruction successful, exit code 0 [2022-03-01 18:51:25,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:51:25,016 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:51:25,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:51:25,017 INFO L85 PathProgramCache]: Analyzing trace with hash -283875383, now seen corresponding path program 115 times [2022-03-01 18:51:25,017 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:51:25,017 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633565572] [2022-03-01 18:51:25,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:51:25,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:51:25,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:51:25,615 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:51:25,615 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:51:25,615 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633565572] [2022-03-01 18:51:25,615 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633565572] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:51:25,615 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021639914] [2022-03-01 18:51:25,615 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:51:25,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:51:25,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:51:25,616 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:51:25,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-03-01 18:51:25,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:51:25,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:51:25,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:51:25,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-01 18:51:26,030 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-03-01 18:51:26,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-03-01 18:51:26,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:51:26,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:51:26,098 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 28 [2022-03-01 18:51:26,225 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:51:26,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:51:26,324 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:51:26,348 INFO L353 Elim1Store]: treesize reduction 15, result has 66.7 percent of original size [2022-03-01 18:51:26,349 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 46 [2022-03-01 18:51:26,749 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:51:26,749 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021639914] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:51:26,750 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:51:26,750 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 38 [2022-03-01 18:51:26,750 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758521304] [2022-03-01 18:51:26,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:51:26,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-01 18:51:26,750 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:51:26,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-01 18:51:26,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=1144, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 18:51:26,750 INFO L87 Difference]: Start difference. First operand 45472 states and 178525 transitions. Second operand has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 38 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:51:32,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:51:32,967 INFO L93 Difference]: Finished difference Result 62264 states and 233957 transitions. [2022-03-01 18:51:32,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-03-01 18:51:32,967 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 38 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-01 18:51:32,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:51:33,164 INFO L225 Difference]: With dead ends: 62264 [2022-03-01 18:51:33,164 INFO L226 Difference]: Without dead ends: 60318 [2022-03-01 18:51:33,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5306 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=2576, Invalid=11944, Unknown=0, NotChecked=0, Total=14520 [2022-03-01 18:51:33,165 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 1004 mSDsluCounter, 897 mSDsCounter, 0 mSdLazyCounter, 1647 mSolverCounterSat, 333 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1004 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 2270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 333 IncrementalHoareTripleChecker+Valid, 1647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 290 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:51:33,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1004 Valid, 558 Invalid, 2270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [333 Valid, 1647 Invalid, 0 Unknown, 290 Unchecked, 1.0s Time] [2022-03-01 18:51:33,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60318 states. [2022-03-01 18:51:34,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60318 to 44889. [2022-03-01 18:51:34,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44889 states, 44888 states have (on average 3.936241311709143) internal successors, (176690), 44888 states have internal predecessors, (176690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:51:34,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44889 states to 44889 states and 176690 transitions. [2022-03-01 18:51:34,706 INFO L78 Accepts]: Start accepts. Automaton has 44889 states and 176690 transitions. Word has length 32 [2022-03-01 18:51:34,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:51:34,706 INFO L470 AbstractCegarLoop]: Abstraction has 44889 states and 176690 transitions. [2022-03-01 18:51:34,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 38 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:51:34,706 INFO L276 IsEmpty]: Start isEmpty. Operand 44889 states and 176690 transitions. [2022-03-01 18:51:34,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 18:51:34,799 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:51:34,800 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:51:34,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Forceful destruction successful, exit code 0 [2022-03-01 18:51:35,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2022-03-01 18:51:35,007 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:51:35,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:51:35,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1587414643, now seen corresponding path program 116 times [2022-03-01 18:51:35,008 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:51:35,008 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959658585] [2022-03-01 18:51:35,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:51:35,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:51:35,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:51:35,384 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:51:35,385 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:51:35,385 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959658585] [2022-03-01 18:51:35,385 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959658585] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:51:35,385 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732340718] [2022-03-01 18:51:35,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:51:35,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:51:35,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:51:35,386 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:51:35,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2022-03-01 18:51:35,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:51:35,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:51:35,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:51:35,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:51:35,678 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-01 18:51:35,710 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-03-01 18:51:35,711 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-03-01 18:51:35,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:51:35,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:51:35,832 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 28 [2022-03-01 18:51:35,947 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:51:35,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:51:36,024 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:51:36,041 INFO L353 Elim1Store]: treesize reduction 15, result has 66.7 percent of original size [2022-03-01 18:51:36,041 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 46 [2022-03-01 18:51:36,468 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:51:36,468 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732340718] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:51:36,468 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:51:36,468 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 38 [2022-03-01 18:51:36,468 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535378448] [2022-03-01 18:51:36,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:51:36,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-01 18:51:36,469 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:51:36,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-01 18:51:36,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=1129, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 18:51:36,469 INFO L87 Difference]: Start difference. First operand 44889 states and 176690 transitions. Second operand has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:51:40,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:51:40,347 INFO L93 Difference]: Finished difference Result 61347 states and 231426 transitions. [2022-03-01 18:51:40,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-03-01 18:51:40,347 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-01 18:51:40,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:51:40,536 INFO L225 Difference]: With dead ends: 61347 [2022-03-01 18:51:40,537 INFO L226 Difference]: Without dead ends: 61101 [2022-03-01 18:51:40,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4829 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2241, Invalid=10641, Unknown=0, NotChecked=0, Total=12882 [2022-03-01 18:51:40,537 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 930 mSDsluCounter, 1024 mSDsCounter, 0 mSdLazyCounter, 2303 mSolverCounterSat, 324 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 930 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 2797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 2303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 170 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:51:40,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [930 Valid, 596 Invalid, 2797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [324 Valid, 2303 Invalid, 0 Unknown, 170 Unchecked, 1.0s Time] [2022-03-01 18:51:40,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61101 states. [2022-03-01 18:51:41,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61101 to 45263. [2022-03-01 18:51:41,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45263 states, 45262 states have (on average 3.9337855154434185) internal successors, (178051), 45262 states have internal predecessors, (178051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:51:42,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45263 states to 45263 states and 178051 transitions. [2022-03-01 18:51:42,058 INFO L78 Accepts]: Start accepts. Automaton has 45263 states and 178051 transitions. Word has length 32 [2022-03-01 18:51:42,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:51:42,058 INFO L470 AbstractCegarLoop]: Abstraction has 45263 states and 178051 transitions. [2022-03-01 18:51:42,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:51:42,059 INFO L276 IsEmpty]: Start isEmpty. Operand 45263 states and 178051 transitions. [2022-03-01 18:51:42,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 18:51:42,162 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:51:42,162 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:51:42,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Forceful destruction successful, exit code 0 [2022-03-01 18:51:42,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:51:42,363 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:51:42,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:51:42,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1682856645, now seen corresponding path program 117 times [2022-03-01 18:51:42,363 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:51:42,363 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854735841] [2022-03-01 18:51:42,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:51:42,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:51:42,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:51:42,769 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:51:42,769 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:51:42,770 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854735841] [2022-03-01 18:51:42,770 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854735841] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:51:42,770 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558055891] [2022-03-01 18:51:42,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:51:42,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:51:42,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:51:42,771 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:51:42,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-03-01 18:51:43,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 18:51:43,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:51:43,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 18:51:43,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:51:43,204 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-01 18:51:43,231 INFO L353 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-03-01 18:51:43,232 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2022-03-01 18:51:43,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:51:43,292 INFO L353 Elim1Store]: treesize reduction 27, result has 15.6 percent of original size [2022-03-01 18:51:43,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 32 [2022-03-01 18:51:43,533 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 18:51:43,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:51:43,646 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:51:43,663 INFO L353 Elim1Store]: treesize reduction 15, result has 66.7 percent of original size [2022-03-01 18:51:43,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 46 [2022-03-01 18:51:43,812 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 18:51:43,812 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558055891] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:51:43,812 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:51:43,812 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-03-01 18:51:43,812 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370859270] [2022-03-01 18:51:43,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:51:43,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 18:51:43,813 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:51:43,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 18:51:43,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:51:43,813 INFO L87 Difference]: Start difference. First operand 45263 states and 178051 transitions. Second operand has 31 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 31 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) [2022-03-01 18:51:48,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:51:48,494 INFO L93 Difference]: Finished difference Result 84532 states and 328094 transitions. [2022-03-01 18:51:48,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-03-01 18:51:48,495 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 31 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 32 [2022-03-01 18:51:48,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:51:48,934 INFO L225 Difference]: With dead ends: 84532 [2022-03-01 18:51:48,934 INFO L226 Difference]: Without dead ends: 84383 [2022-03-01 18:51:48,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4305 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1724, Invalid=10708, Unknown=0, NotChecked=0, Total=12432 [2022-03-01 18:51:48,934 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 560 mSDsluCounter, 1257 mSDsCounter, 0 mSdLazyCounter, 1595 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 4480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 1595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2736 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 18:51:48,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [560 Valid, 631 Invalid, 4480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 1595 Invalid, 0 Unknown, 2736 Unchecked, 0.8s Time] [2022-03-01 18:51:49,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84383 states. [2022-03-01 18:51:50,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84383 to 46142. [2022-03-01 18:51:50,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46142 states, 46141 states have (on average 3.9425673479118353) internal successors, (181914), 46141 states have internal predecessors, (181914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:51:50,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46142 states to 46142 states and 181914 transitions. [2022-03-01 18:51:50,844 INFO L78 Accepts]: Start accepts. Automaton has 46142 states and 181914 transitions. Word has length 32 [2022-03-01 18:51:50,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:51:50,845 INFO L470 AbstractCegarLoop]: Abstraction has 46142 states and 181914 transitions. [2022-03-01 18:51:50,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 31 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) [2022-03-01 18:51:50,845 INFO L276 IsEmpty]: Start isEmpty. Operand 46142 states and 181914 transitions. [2022-03-01 18:51:50,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 18:51:50,940 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:51:50,940 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:51:50,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Forceful destruction successful, exit code 0 [2022-03-01 18:51:51,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:51:51,148 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:51:51,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:51:51,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1599616251, now seen corresponding path program 118 times [2022-03-01 18:51:51,149 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:51:51,149 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824742435] [2022-03-01 18:51:51,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:51:51,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:51:51,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:51:51,503 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:51:51,503 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:51:51,503 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824742435] [2022-03-01 18:51:51,503 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824742435] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:51:51,503 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553739212] [2022-03-01 18:51:51,504 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:51:51,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:51:51,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:51:51,505 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:51:51,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2022-03-01 18:51:51,582 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:51:51,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:51:51,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:51:51,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:51:51,848 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-01 18:51:51,885 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-03-01 18:51:51,886 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-03-01 18:51:52,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:51:52,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:51:52,133 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 28 [2022-03-01 18:51:52,313 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:51:52,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:51:52,415 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:51:52,439 INFO L353 Elim1Store]: treesize reduction 15, result has 66.7 percent of original size [2022-03-01 18:51:52,439 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 46 [2022-03-01 18:51:52,832 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:51:52,832 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553739212] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:51:52,832 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:51:52,833 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 38 [2022-03-01 18:51:52,833 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982369730] [2022-03-01 18:51:52,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:51:52,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-01 18:51:52,833 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:51:52,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-01 18:51:52,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1142, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 18:51:52,833 INFO L87 Difference]: Start difference. First operand 46142 states and 181914 transitions. Second operand has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 38 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:51:59,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:51:59,490 INFO L93 Difference]: Finished difference Result 65261 states and 244005 transitions. [2022-03-01 18:51:59,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-03-01 18:51:59,490 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 38 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-01 18:51:59,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:51:59,726 INFO L225 Difference]: With dead ends: 65261 [2022-03-01 18:51:59,726 INFO L226 Difference]: Without dead ends: 64742 [2022-03-01 18:51:59,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9266 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=3789, Invalid=20081, Unknown=0, NotChecked=0, Total=23870 [2022-03-01 18:51:59,727 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 1323 mSDsluCounter, 1419 mSDsCounter, 0 mSdLazyCounter, 2151 mSolverCounterSat, 360 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1323 SdHoareTripleChecker+Valid, 797 SdHoareTripleChecker+Invalid, 4080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 360 IncrementalHoareTripleChecker+Valid, 2151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1569 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:51:59,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1323 Valid, 797 Invalid, 4080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [360 Valid, 2151 Invalid, 0 Unknown, 1569 Unchecked, 1.2s Time] [2022-03-01 18:51:59,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64742 states. [2022-03-01 18:52:01,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64742 to 46289. [2022-03-01 18:52:01,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46289 states, 46288 states have (on average 3.942814552367784) internal successors, (182505), 46288 states have internal predecessors, (182505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:52:01,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46289 states to 46289 states and 182505 transitions. [2022-03-01 18:52:01,477 INFO L78 Accepts]: Start accepts. Automaton has 46289 states and 182505 transitions. Word has length 32 [2022-03-01 18:52:01,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:52:01,477 INFO L470 AbstractCegarLoop]: Abstraction has 46289 states and 182505 transitions. [2022-03-01 18:52:01,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 38 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:52:01,477 INFO L276 IsEmpty]: Start isEmpty. Operand 46289 states and 182505 transitions. [2022-03-01 18:52:01,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 18:52:01,573 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:52:01,573 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:52:01,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Forceful destruction successful, exit code 0 [2022-03-01 18:52:01,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:52:01,789 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:52:01,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:52:01,789 INFO L85 PathProgramCache]: Analyzing trace with hash -608109631, now seen corresponding path program 119 times [2022-03-01 18:52:01,789 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:52:01,789 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681857033] [2022-03-01 18:52:01,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:52:01,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:52:01,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:52:02,558 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:52:02,558 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:52:02,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681857033] [2022-03-01 18:52:02,558 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681857033] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:52:02,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121310059] [2022-03-01 18:52:02,558 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:52:02,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:52:02,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:52:02,559 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:52:02,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2022-03-01 18:52:02,664 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 18:52:02,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:52:02,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 18:52:02,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:52:02,820 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-01 18:52:02,861 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-03-01 18:52:02,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-03-01 18:52:02,972 INFO L353 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2022-03-01 18:52:02,972 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2022-03-01 18:52:03,207 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 18:52:03,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:52:03,351 INFO L353 Elim1Store]: treesize reduction 15, result has 69.4 percent of original size [2022-03-01 18:52:03,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 22 treesize of output 48 [2022-03-01 18:52:03,586 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 18:52:03,586 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121310059] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:52:03,586 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:52:03,586 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 11] total 33 [2022-03-01 18:52:03,586 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417834176] [2022-03-01 18:52:03,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:52:03,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 18:52:03,586 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:52:03,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 18:52:03,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=906, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 18:52:03,587 INFO L87 Difference]: Start difference. First operand 46289 states and 182505 transitions. Second operand has 33 states, 33 states have (on average 2.272727272727273) internal successors, (75), 33 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:52:05,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:52:05,519 INFO L93 Difference]: Finished difference Result 48412 states and 189858 transitions. [2022-03-01 18:52:05,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-01 18:52:05,520 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.272727272727273) internal successors, (75), 33 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-01 18:52:05,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:52:05,796 INFO L225 Difference]: With dead ends: 48412 [2022-03-01 18:52:05,796 INFO L226 Difference]: Without dead ends: 48382 [2022-03-01 18:52:05,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 57 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1209 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=571, Invalid=3719, Unknown=0, NotChecked=0, Total=4290 [2022-03-01 18:52:05,797 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 305 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 982 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 1340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 315 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:52:05,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 386 Invalid, 1340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 982 Invalid, 0 Unknown, 315 Unchecked, 0.5s Time] [2022-03-01 18:52:05,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48382 states. [2022-03-01 18:52:06,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48382 to 46367. [2022-03-01 18:52:06,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46367 states, 46366 states have (on average 3.9409049734719406) internal successors, (182724), 46366 states have internal predecessors, (182724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:52:06,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46367 states to 46367 states and 182724 transitions. [2022-03-01 18:52:06,937 INFO L78 Accepts]: Start accepts. Automaton has 46367 states and 182724 transitions. Word has length 32 [2022-03-01 18:52:06,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:52:06,937 INFO L470 AbstractCegarLoop]: Abstraction has 46367 states and 182724 transitions. [2022-03-01 18:52:06,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.272727272727273) internal successors, (75), 33 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:52:06,937 INFO L276 IsEmpty]: Start isEmpty. Operand 46367 states and 182724 transitions. [2022-03-01 18:52:07,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 18:52:07,029 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:52:07,029 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:52:07,045 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Ended with exit code 0 [2022-03-01 18:52:07,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:52:07,245 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:52:07,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:52:07,245 INFO L85 PathProgramCache]: Analyzing trace with hash 2061073029, now seen corresponding path program 120 times [2022-03-01 18:52:07,245 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:52:07,245 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780659820] [2022-03-01 18:52:07,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:52:07,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:52:07,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:52:07,926 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:52:07,927 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:52:07,927 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780659820] [2022-03-01 18:52:07,927 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780659820] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:52:07,927 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631932451] [2022-03-01 18:52:07,927 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:52:07,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:52:07,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:52:07,928 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:52:07,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2022-03-01 18:52:08,008 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 18:52:08,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:52:08,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 18:52:08,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:52:08,164 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-01 18:52:08,204 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-03-01 18:52:08,204 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-03-01 18:52:08,317 INFO L353 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2022-03-01 18:52:08,318 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2022-03-01 18:52:08,562 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 18:52:08,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:52:08,726 INFO L353 Elim1Store]: treesize reduction 15, result has 69.4 percent of original size [2022-03-01 18:52:08,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 22 treesize of output 48 [2022-03-01 18:52:08,972 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 18:52:08,972 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631932451] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:52:08,972 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:52:08,972 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 11] total 33 [2022-03-01 18:52:08,972 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741287688] [2022-03-01 18:52:08,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:52:08,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 18:52:08,972 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:52:08,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 18:52:08,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=906, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 18:52:08,973 INFO L87 Difference]: Start difference. First operand 46367 states and 182724 transitions. Second operand has 33 states, 33 states have (on average 2.303030303030303) internal successors, (76), 33 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) [2022-03-01 18:52:12,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:52:12,748 INFO L93 Difference]: Finished difference Result 61422 states and 234799 transitions. [2022-03-01 18:52:12,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-01 18:52:12,748 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.303030303030303) internal successors, (76), 33 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 32 [2022-03-01 18:52:12,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:52:12,960 INFO L225 Difference]: With dead ends: 61422 [2022-03-01 18:52:12,960 INFO L226 Difference]: Without dead ends: 61247 [2022-03-01 18:52:12,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2328 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1263, Invalid=6747, Unknown=0, NotChecked=0, Total=8010 [2022-03-01 18:52:12,960 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 376 mSDsluCounter, 1086 mSDsCounter, 0 mSdLazyCounter, 1860 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 3094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1142 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 18:52:12,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 563 Invalid, 3094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1860 Invalid, 0 Unknown, 1142 Unchecked, 0.8s Time] [2022-03-01 18:52:13,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61247 states. [2022-03-01 18:52:14,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61247 to 47014. [2022-03-01 18:52:14,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47014 states, 47013 states have (on average 3.9409525024993086) internal successors, (185276), 47013 states have internal predecessors, (185276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:52:14,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47014 states to 47014 states and 185276 transitions. [2022-03-01 18:52:14,285 INFO L78 Accepts]: Start accepts. Automaton has 47014 states and 185276 transitions. Word has length 32 [2022-03-01 18:52:14,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:52:14,285 INFO L470 AbstractCegarLoop]: Abstraction has 47014 states and 185276 transitions. [2022-03-01 18:52:14,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.303030303030303) internal successors, (76), 33 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) [2022-03-01 18:52:14,285 INFO L276 IsEmpty]: Start isEmpty. Operand 47014 states and 185276 transitions. [2022-03-01 18:52:14,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 18:52:14,604 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:52:14,604 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:52:14,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Forceful destruction successful, exit code 0 [2022-03-01 18:52:14,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:52:14,819 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:52:14,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:52:14,821 INFO L85 PathProgramCache]: Analyzing trace with hash 2038069893, now seen corresponding path program 121 times [2022-03-01 18:52:14,821 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:52:14,821 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589291557] [2022-03-01 18:52:14,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:52:14,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:52:14,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:52:15,301 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:52:15,301 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:52:15,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589291557] [2022-03-01 18:52:15,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589291557] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:52:15,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313900591] [2022-03-01 18:52:15,301 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:52:15,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:52:15,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:52:15,302 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:52:15,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2022-03-01 18:52:15,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:52:15,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 18:52:15,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:52:15,599 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:52:15,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:52:15,628 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-03-01 18:52:15,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:52:15,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:52:15,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:52:15,701 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 32 [2022-03-01 18:52:15,884 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:52:15,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:52:15,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:52:16,022 INFO L353 Elim1Store]: treesize reduction 15, result has 66.7 percent of original size [2022-03-01 18:52:16,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 46 [2022-03-01 18:52:16,452 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:52:16,452 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313900591] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:52:16,452 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:52:16,452 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 40 [2022-03-01 18:52:16,452 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612043412] [2022-03-01 18:52:16,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:52:16,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-01 18:52:16,452 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:52:16,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-01 18:52:16,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1352, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 18:52:16,453 INFO L87 Difference]: Start difference. First operand 47014 states and 185276 transitions. Second operand has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:53:08,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:53:08,312 INFO L93 Difference]: Finished difference Result 123004 states and 446284 transitions. [2022-03-01 18:53:08,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 497 states. [2022-03-01 18:53:08,312 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-01 18:53:08,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:53:08,769 INFO L225 Difference]: With dead ends: 123004 [2022-03-01 18:53:08,769 INFO L226 Difference]: Without dead ends: 118986 [2022-03-01 18:53:08,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 40 SyntacticMatches, 12 SemanticMatches, 511 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124231 ImplicationChecksByTransitivity, 47.4s TimeCoverageRelationStatistics Valid=33951, Invalid=228704, Unknown=1, NotChecked=0, Total=262656 [2022-03-01 18:53:08,777 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 1771 mSDsluCounter, 3027 mSDsCounter, 0 mSdLazyCounter, 5366 mSolverCounterSat, 572 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1771 SdHoareTripleChecker+Valid, 1635 SdHoareTripleChecker+Invalid, 8000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 572 IncrementalHoareTripleChecker+Valid, 5366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2062 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:53:08,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1771 Valid, 1635 Invalid, 8000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [572 Valid, 5366 Invalid, 0 Unknown, 2062 Unchecked, 3.4s Time] [2022-03-01 18:53:08,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118986 states. [2022-03-01 18:53:11,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118986 to 52857. [2022-03-01 18:53:11,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52857 states, 52856 states have (on average 3.9641100348115637) internal successors, (209527), 52856 states have internal predecessors, (209527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:53:11,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52857 states to 52857 states and 209527 transitions. [2022-03-01 18:53:11,441 INFO L78 Accepts]: Start accepts. Automaton has 52857 states and 209527 transitions. Word has length 32 [2022-03-01 18:53:11,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:53:11,442 INFO L470 AbstractCegarLoop]: Abstraction has 52857 states and 209527 transitions. [2022-03-01 18:53:11,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:53:11,442 INFO L276 IsEmpty]: Start isEmpty. Operand 52857 states and 209527 transitions. [2022-03-01 18:53:11,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 18:53:11,563 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:53:11,563 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:53:11,578 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Ended with exit code 0 [2022-03-01 18:53:11,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2022-03-01 18:53:11,775 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:53:11,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:53:11,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1110344379, now seen corresponding path program 122 times [2022-03-01 18:53:11,776 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:53:11,776 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433267445] [2022-03-01 18:53:11,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:53:11,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:53:11,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:53:12,588 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:53:12,588 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:53:12,588 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433267445] [2022-03-01 18:53:12,588 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433267445] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:53:12,588 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735888651] [2022-03-01 18:53:12,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:53:12,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:53:12,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:53:12,644 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:53:12,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2022-03-01 18:53:12,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:53:12,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:53:12,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:53:12,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:53:12,961 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:53:13,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:53:13,101 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-03-01 18:53:13,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:53:13,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:53:13,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:53:13,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 32 [2022-03-01 18:53:13,285 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:53:13,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:53:13,469 INFO L353 Elim1Store]: treesize reduction 25, result has 54.5 percent of original size [2022-03-01 18:53:13,469 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 46 [2022-03-01 18:53:13,881 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:53:13,882 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735888651] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:53:13,882 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:53:13,882 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 40 [2022-03-01 18:53:13,882 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369469055] [2022-03-01 18:53:13,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:53:13,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-01 18:53:13,882 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:53:13,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-01 18:53:13,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1379, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 18:53:13,883 INFO L87 Difference]: Start difference. First operand 52857 states and 209527 transitions. Second operand has 40 states, 40 states have (on average 2.125) internal successors, (85), 40 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) [2022-03-01 18:53:33,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:53:33,298 INFO L93 Difference]: Finished difference Result 79254 states and 298823 transitions. [2022-03-01 18:53:33,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 231 states. [2022-03-01 18:53:33,299 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 40 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 32 [2022-03-01 18:53:33,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:53:33,594 INFO L225 Difference]: With dead ends: 79254 [2022-03-01 18:53:33,594 INFO L226 Difference]: Without dead ends: 79199 [2022-03-01 18:53:33,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 252 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26107 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=5468, Invalid=58794, Unknown=0, NotChecked=0, Total=64262 [2022-03-01 18:53:33,596 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 1117 mSDsluCounter, 2255 mSDsCounter, 0 mSdLazyCounter, 6763 mSolverCounterSat, 286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1117 SdHoareTripleChecker+Valid, 1207 SdHoareTripleChecker+Invalid, 7150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 286 IncrementalHoareTripleChecker+Valid, 6763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:53:33,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1117 Valid, 1207 Invalid, 7150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [286 Valid, 6763 Invalid, 0 Unknown, 101 Unchecked, 3.7s Time] [2022-03-01 18:53:33,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79199 states. [2022-03-01 18:53:35,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79199 to 54295. [2022-03-01 18:53:35,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54295 states, 54294 states have (on average 3.956146167163959) internal successors, (214795), 54294 states have internal predecessors, (214795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:53:35,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54295 states to 54295 states and 214795 transitions. [2022-03-01 18:53:35,645 INFO L78 Accepts]: Start accepts. Automaton has 54295 states and 214795 transitions. Word has length 32 [2022-03-01 18:53:35,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:53:35,645 INFO L470 AbstractCegarLoop]: Abstraction has 54295 states and 214795 transitions. [2022-03-01 18:53:35,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 40 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) [2022-03-01 18:53:35,645 INFO L276 IsEmpty]: Start isEmpty. Operand 54295 states and 214795 transitions. Received shutdown request... [2022-03-01 18:53:35,790 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-01 18:53:35,790 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 [2022-03-01 18:53:35,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Forceful destruction successful, exit code 0 [2022-03-01 18:53:35,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2022-03-01 18:53:35,981 WARN L594 AbstractCegarLoop]: Verification canceled: while IsEmpty was searching accepting run (input had 54295 states). [2022-03-01 18:53:35,983 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-03-01 18:53:35,983 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-03-01 18:53:35,983 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-03-01 18:53:35,984 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-03-01 18:53:35,985 INFO L732 BasicCegarLoop]: Path program histogram: [122, 34, 1, 1] [2022-03-01 18:53:35,987 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-01 18:53:35,987 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-01 18:53:35,988 INFO L202 PluginConnector]: Adding new model parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.03 06:53:35 BasicIcfg [2022-03-01 18:53:35,988 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-01 18:53:35,988 INFO L158 Benchmark]: Toolchain (without parser) took 866373.00ms. Allocated memory was 240.1MB in the beginning and 7.2GB in the end (delta: 6.9GB). Free memory was 203.7MB in the beginning and 5.5GB in the end (delta: -5.3GB). Peak memory consumption was 1.7GB. Max. memory is 8.0GB. [2022-03-01 18:53:35,988 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.14ms. Allocated memory is still 240.1MB. Free memory is still 204.9MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-01 18:53:35,988 INFO L158 Benchmark]: Boogie Procedure Inliner took 28.97ms. Allocated memory is still 240.1MB. Free memory was 203.7MB in the beginning and 202.2MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-01 18:53:35,988 INFO L158 Benchmark]: Boogie Preprocessor took 15.30ms. Allocated memory is still 240.1MB. Free memory was 202.2MB in the beginning and 201.2MB in the end (delta: 960.9kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-01 18:53:35,988 INFO L158 Benchmark]: RCFGBuilder took 180.90ms. Allocated memory is still 240.1MB. Free memory was 201.1MB in the beginning and 191.7MB in the end (delta: 9.4MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-01 18:53:35,989 INFO L158 Benchmark]: TraceAbstraction took 866143.62ms. Allocated memory was 240.1MB in the beginning and 7.2GB in the end (delta: 6.9GB). Free memory was 191.3MB in the beginning and 5.5GB in the end (delta: -5.3GB). Peak memory consumption was 1.7GB. Max. memory is 8.0GB. [2022-03-01 18:53:35,989 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 0.14ms. Allocated memory is still 240.1MB. Free memory is still 204.9MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 28.97ms. Allocated memory is still 240.1MB. Free memory was 203.7MB in the beginning and 202.2MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 15.30ms. Allocated memory is still 240.1MB. Free memory was 202.2MB in the beginning and 201.2MB in the end (delta: 960.9kB). There was no memory consumed. Max. memory is 8.0GB. * RCFGBuilder took 180.90ms. Allocated memory is still 240.1MB. Free memory was 201.1MB in the beginning and 191.7MB in the end (delta: 9.4MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 866143.62ms. Allocated memory was 240.1MB in the beginning and 7.2GB in the end (delta: 6.9GB). Free memory was 191.3MB in the beginning and 5.5GB in the end (delta: -5.3GB). Peak memory consumption was 1.7GB. 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: 67]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while IsEmpty was searching accepting run (input had 54295 states). - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while IsEmpty was searching accepting run (input had 54295 states). - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while IsEmpty was searching accepting run (input had 54295 states). - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while IsEmpty was searching accepting run (input had 54295 states). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 44 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 866.1s, OverallIterations: 158, TraceHistogramMax: 3, PathProgramHistogramMax: 122, EmptinessCheckTime: 5.8s, AutomataDifference: 622.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 103641 SdHoareTripleChecker+Valid, 99.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 103641 mSDsluCounter, 74381 SdHoareTripleChecker+Invalid, 84.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 52951 IncrementalHoareTripleChecker+Unchecked, 125302 mSDsCounter, 23794 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 206460 IncrementalHoareTripleChecker+Invalid, 283205 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 23794 mSolverCounterUnsat, 5286 mSDtfsCounter, 206460 mSolverCounterSat, 0.8s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 25909 GetRequests, 7484 SyntacticMatches, 379 SemanticMatches, 18046 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1282929 ImplicationChecksByTransitivity, 506.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=54295occurred in iteration=158, InterpolantAutomatonStates: 16561, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 94.3s AutomataMinimizationTime, 158 MinimizatonAttempts, 1802331 StatesRemovedByMinimization, 157 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 1.8s SatisfiabilityAnalysisTime, 98.3s InterpolantComputationTime, 9242 NumberOfCodeBlocks, 9212 NumberOfCodeBlocksAsserted, 554 NumberOfCheckSat, 13372 ConstructedInterpolants, 587 QuantifiedInterpolants, 163494 SizeOfPredicates, 1511 NumberOfNonLiveVariables, 11214 ConjunctsInSsa, 2210 ConjunctsInUnsatCore, 470 InterpolantComputations, 2 PerfectInterpolantSequences, 1541/4699 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