/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/figure1.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-4b0ab11 [2022-03-03 19:26:29,212 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-03 19:26:29,241 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-03 19:26:29,271 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-03 19:26:29,271 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-03 19:26:29,273 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-03 19:26:29,277 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-03 19:26:29,281 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-03 19:26:29,282 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-03 19:26:29,283 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-03 19:26:29,283 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-03 19:26:29,284 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2022-03-03 19:26:29,311 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-03 19:26:29,312 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-03 19:26:29,312 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-03 19:26:29,315 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 [2022-03-03 19:26:29,341 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-03 19:26:29,341 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-03 19:26:29,342 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-03 19:26:29,342 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-03 19:26:29,342 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-03 19:26:29,343 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-03 19:26:29,343 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-03 19:26:29,343 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-03 19:26:29,343 INFO L138 SettingsManager]: * Use SBE=true [2022-03-03 19:26:29,343 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-03 19:26:29,344 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-03 19:26:29,344 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-03 19:26:29,344 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-03 19:26:29,344 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-03 19:26:29,344 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-03 19:26:29,344 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-03 19:26:29,344 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-03 19:26:29,344 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-03 19:26:29,345 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-03 19:26:29,345 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-03 19:26:29,345 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-03 19:26:29,345 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-03 19:26:29,345 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-03 19:26:29,345 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-03 19:26:29,345 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-03 19:26:29,345 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-03 19:26:29,345 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-03 19:26:29,345 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-03 19:26:29,345 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-03 19:26:29,345 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-03 19:26:29,346 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-03 19:26:29,346 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-03 19:26:29,346 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-03 19:26:29,346 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-03 19:26:29,534 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-03 19:26:29,555 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-03 19:26:29,557 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-03 19:26:29,558 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-03 19:26:29,559 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-03 19:26:29,560 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/figure1.wvr.bpl [2022-03-03 19:26:29,560 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/figure1.wvr.bpl' [2022-03-03 19:26:29,590 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-03 19:26:29,591 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-03 19:26:29,592 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-03 19:26:29,592 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-03 19:26:29,592 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-03 19:26:29,603 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:26:29" (1/1) ... [2022-03-03 19:26:29,607 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:26:29" (1/1) ... [2022-03-03 19:26:29,613 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-03 19:26:29,614 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-03 19:26:29,615 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-03 19:26:29,615 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-03 19:26:29,615 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-03 19:26:29,621 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:26:29" (1/1) ... [2022-03-03 19:26:29,621 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:26:29" (1/1) ... [2022-03-03 19:26:29,621 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:26:29" (1/1) ... [2022-03-03 19:26:29,621 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:26:29" (1/1) ... [2022-03-03 19:26:29,623 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:26:29" (1/1) ... [2022-03-03 19:26:29,626 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:26:29" (1/1) ... [2022-03-03 19:26:29,626 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:26:29" (1/1) ... [2022-03-03 19:26:29,629 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-03 19:26:29,630 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-03 19:26:29,630 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-03 19:26:29,630 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-03 19:26:29,631 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:26:29" (1/1) ... [2022-03-03 19:26:29,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-03 19:26:29,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:26:29,659 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) [2022-03-03 19:26:29,675 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 [2022-03-03 19:26:29,685 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-03 19:26:29,686 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-03 19:26:29,686 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-03 19:26:29,686 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-03 19:26:29,686 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-03 19:26:29,686 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-03 19:26:29,686 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-03 19:26:29,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-03 19:26:29,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-03 19:26:29,687 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-03 19:26:29,719 INFO L234 CfgBuilder]: Building ICFG [2022-03-03 19:26:29,720 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-03 19:26:29,796 INFO L275 CfgBuilder]: Performing block encoding [2022-03-03 19:26:29,807 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-03 19:26:29,807 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-03 19:26:29,809 INFO L202 PluginConnector]: Adding new model figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.03 07:26:29 BoogieIcfgContainer [2022-03-03 19:26:29,809 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-03 19:26:29,810 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-03 19:26:29,810 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-03 19:26:29,814 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-03 19:26:29,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:26:29" (1/2) ... [2022-03-03 19:26:29,815 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3964e566 and model type figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 07:26:29, skipping insertion in model container [2022-03-03 19:26:29,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.03 07:26:29" (2/2) ... [2022-03-03 19:26:29,817 INFO L111 eAbstractionObserver]: Analyzing ICFG figure1.wvr.bpl [2022-03-03 19:26:29,820 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-03 19:26:29,820 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-03 19:26:29,820 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-03 19:26:29,820 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-03 19:26:29,841 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-03-03 19:26:29,903 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-03 19:26:29,910 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 [2022-03-03 19:26:29,911 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-03-03 19:26:29,920 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 27 places, 22 transitions, 60 flow [2022-03-03 19:26:29,938 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 32 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:26:29,940 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:26:29,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-03 19:26:29,945 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:26:29,945 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:26:29,945 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:26:29,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:26:29,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1212787643, now seen corresponding path program 1 times [2022-03-03 19:26:29,955 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:26:29,955 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264090037] [2022-03-03 19:26:29,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:26:29,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:26:30,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:26:30,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:26:30,048 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:26:30,049 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264090037] [2022-03-03 19:26:30,049 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264090037] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:26:30,049 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:26:30,049 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-03 19:26:30,050 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034684870] [2022-03-03 19:26:30,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:26:30,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-03 19:26:30,053 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:26:30,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-03 19:26:30,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-03 19:26:30,072 INFO L87 Difference]: Start difference. First operand has 32 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:26:30,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:26:30,095 INFO L93 Difference]: Finished difference Result 57 states and 100 transitions. [2022-03-03 19:26:30,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-03 19:26:30,097 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-03 19:26:30,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:26:30,103 INFO L225 Difference]: With dead ends: 57 [2022-03-03 19:26:30,103 INFO L226 Difference]: Without dead ends: 42 [2022-03-03 19:26:30,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-03 19:26:30,106 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 2 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:26:30,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 20 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:26:30,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-03-03 19:26:30,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2022-03-03 19:26:30,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.8205128205128205) internal successors, (71), 39 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) [2022-03-03 19:26:30,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 71 transitions. [2022-03-03 19:26:30,129 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 71 transitions. Word has length 14 [2022-03-03 19:26:30,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:26:30,129 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 71 transitions. [2022-03-03 19:26:30,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:26:30,129 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 71 transitions. [2022-03-03 19:26:30,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-03 19:26:30,130 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:26:30,130 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:26:30,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-03 19:26:30,130 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:26:30,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:26:30,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1488322375, now seen corresponding path program 1 times [2022-03-03 19:26:30,131 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:26:30,131 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954489346] [2022-03-03 19:26:30,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:26:30,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:26:30,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:26:30,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:26:30,246 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:26:30,247 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954489346] [2022-03-03 19:26:30,247 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954489346] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:26:30,247 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194196169] [2022-03-03 19:26:30,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:26:30,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:26:30,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:26:30,249 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) [2022-03-03 19:26:30,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-03 19:26:30,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:26:30,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 19:26:30,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:26:30,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:26:30,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:26:30,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:26:30,485 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194196169] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-03 19:26:30,485 INFO L191 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-03 19:26:30,485 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2022-03-03 19:26:30,486 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695088003] [2022-03-03 19:26:30,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:26:30,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-03 19:26:30,487 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:26:30,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-03 19:26:30,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-03-03 19:26:30,487 INFO L87 Difference]: Start difference. First operand 40 states and 71 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:26:30,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:26:30,566 INFO L93 Difference]: Finished difference Result 75 states and 126 transitions. [2022-03-03 19:26:30,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-03 19:26:30,566 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-03 19:26:30,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:26:30,567 INFO L225 Difference]: With dead ends: 75 [2022-03-03 19:26:30,567 INFO L226 Difference]: Without dead ends: 75 [2022-03-03 19:26:30,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:26:30,568 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 60 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:26:30,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 28 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:26:30,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-03-03 19:26:30,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 45. [2022-03-03 19:26:30,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.8181818181818181) internal successors, (80), 44 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) [2022-03-03 19:26:30,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 80 transitions. [2022-03-03 19:26:30,574 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 80 transitions. Word has length 16 [2022-03-03 19:26:30,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:26:30,575 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 80 transitions. [2022-03-03 19:26:30,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:26:30,575 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 80 transitions. [2022-03-03 19:26:30,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-03 19:26:30,576 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:26:30,576 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:26:30,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-03 19:26:30,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:26:30,805 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:26:30,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:26:30,805 INFO L85 PathProgramCache]: Analyzing trace with hash -841147161, now seen corresponding path program 2 times [2022-03-03 19:26:30,805 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:26:30,805 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635502315] [2022-03-03 19:26:30,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:26:30,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:26:30,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:26:30,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:26:30,882 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:26:30,882 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635502315] [2022-03-03 19:26:30,882 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635502315] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:26:30,883 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:26:30,883 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-03 19:26:30,883 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455722504] [2022-03-03 19:26:30,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:26:30,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-03 19:26:30,883 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:26:30,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-03 19:26:30,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-03 19:26:30,884 INFO L87 Difference]: Start difference. First operand 45 states and 80 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:26:30,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:26:30,957 INFO L93 Difference]: Finished difference Result 50 states and 88 transitions. [2022-03-03 19:26:30,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-03 19:26:30,957 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-03 19:26:30,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:26:30,958 INFO L225 Difference]: With dead ends: 50 [2022-03-03 19:26:30,958 INFO L226 Difference]: Without dead ends: 48 [2022-03-03 19:26:30,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-03 19:26:30,959 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 53 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:26:30,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 19 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:26:30,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-03 19:26:30,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 43. [2022-03-03 19:26:30,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 42 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) [2022-03-03 19:26:30,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 76 transitions. [2022-03-03 19:26:30,979 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 76 transitions. Word has length 16 [2022-03-03 19:26:30,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:26:30,979 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 76 transitions. [2022-03-03 19:26:30,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:26:30,979 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 76 transitions. [2022-03-03 19:26:30,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-03 19:26:30,980 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:26:30,980 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:26:30,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-03 19:26:30,980 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:26:30,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:26:30,981 INFO L85 PathProgramCache]: Analyzing trace with hash -976918153, now seen corresponding path program 1 times [2022-03-03 19:26:30,981 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:26:30,981 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248340493] [2022-03-03 19:26:30,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:26:30,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:26:30,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:26:31,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:26:31,035 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:26:31,035 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248340493] [2022-03-03 19:26:31,036 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248340493] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:26:31,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3530287] [2022-03-03 19:26:31,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:26:31,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:26:31,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:26:31,037 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) [2022-03-03 19:26:31,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-03 19:26:31,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:26:31,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:26:31,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:26:31,133 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:26:31,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:26:31,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:26:31,196 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3530287] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:26:31,196 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:26:31,197 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-03-03 19:26:31,204 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538365326] [2022-03-03 19:26:31,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:26:31,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-03 19:26:31,205 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:26:31,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-03 19:26:31,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-03 19:26:31,206 INFO L87 Difference]: Start difference. First operand 43 states and 76 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:26:31,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:26:31,230 INFO L93 Difference]: Finished difference Result 96 states and 173 transitions. [2022-03-03 19:26:31,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-03 19:26:31,231 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-03 19:26:31,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:26:31,232 INFO L225 Difference]: With dead ends: 96 [2022-03-03 19:26:31,232 INFO L226 Difference]: Without dead ends: 75 [2022-03-03 19:26:31,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-03 19:26:31,233 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:26:31,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 42 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:26:31,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-03-03 19:26:31,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 58. [2022-03-03 19:26:31,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.912280701754386) internal successors, (109), 57 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:26:31,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 109 transitions. [2022-03-03 19:26:31,238 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 109 transitions. Word has length 18 [2022-03-03 19:26:31,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:26:31,238 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 109 transitions. [2022-03-03 19:26:31,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:26:31,238 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 109 transitions. [2022-03-03 19:26:31,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 19:26:31,239 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:26:31,239 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:26:31,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-03 19:26:31,439 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 [2022-03-03 19:26:31,441 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:26:31,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:26:31,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1383534453, now seen corresponding path program 2 times [2022-03-03 19:26:31,441 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:26:31,442 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445259665] [2022-03-03 19:26:31,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:26:31,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:26:31,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:26:31,522 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:26:31,523 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:26:31,523 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445259665] [2022-03-03 19:26:31,523 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445259665] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:26:31,523 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759136028] [2022-03-03 19:26:31,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:26:31,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:26:31,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:26:31,527 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) [2022-03-03 19:26:31,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:26:31,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:26:31,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:26:31,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:26:31,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-03 19:26:31,687 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:26:31,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:26:31,770 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:26:31,770 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759136028] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:26:31,771 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:26:31,771 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2022-03-03 19:26:31,771 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991301756] [2022-03-03 19:26:31,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:26:31,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 19:26:31,774 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:26:31,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 19:26:31,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:26:31,779 INFO L87 Difference]: Start difference. First operand 58 states and 109 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:26:32,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:26:32,125 INFO L93 Difference]: Finished difference Result 183 states and 329 transitions. [2022-03-03 19:26:32,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-03 19:26:32,126 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 19:26:32,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:26:32,127 INFO L225 Difference]: With dead ends: 183 [2022-03-03 19:26:32,128 INFO L226 Difference]: Without dead ends: 177 [2022-03-03 19:26:32,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=756, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 19:26:32,130 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 125 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:26:32,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 109 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:26:32,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-03-03 19:26:32,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 67. [2022-03-03 19:26:32,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.9545454545454546) internal successors, (129), 66 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:26:32,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 129 transitions. [2022-03-03 19:26:32,150 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 129 transitions. Word has length 20 [2022-03-03 19:26:32,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:26:32,150 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 129 transitions. [2022-03-03 19:26:32,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:26:32,150 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 129 transitions. [2022-03-03 19:26:32,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 19:26:32,151 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:26:32,151 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:26:32,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-03 19:26:32,369 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 [2022-03-03 19:26:32,369 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:26:32,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:26:32,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1633346791, now seen corresponding path program 3 times [2022-03-03 19:26:32,370 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:26:32,370 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424985891] [2022-03-03 19:26:32,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:26:32,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:26:32,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:26:32,419 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:26:32,419 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:26:32,419 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424985891] [2022-03-03 19:26:32,419 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424985891] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:26:32,419 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58499849] [2022-03-03 19:26:32,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:26:32,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:26:32,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:26:32,420 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) [2022-03-03 19:26:32,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-03 19:26:32,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 19:26:32,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:26:32,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:26:32,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:26:32,542 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:26:32,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:26:32,620 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:26:32,620 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58499849] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:26:32,620 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:26:32,620 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-03-03 19:26:32,620 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220737677] [2022-03-03 19:26:32,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:26:32,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 19:26:32,621 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:26:32,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 19:26:32,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2022-03-03 19:26:32,621 INFO L87 Difference]: Start difference. First operand 67 states and 129 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:26:32,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:26:32,866 INFO L93 Difference]: Finished difference Result 145 states and 267 transitions. [2022-03-03 19:26:32,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-03 19:26:32,867 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 19:26:32,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:26:32,867 INFO L225 Difference]: With dead ends: 145 [2022-03-03 19:26:32,867 INFO L226 Difference]: Without dead ends: 141 [2022-03-03 19:26:32,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=259, Invalid=553, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:26:32,868 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 108 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:26:32,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 51 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:26:32,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-03-03 19:26:32,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 66. [2022-03-03 19:26:32,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.9384615384615385) internal successors, (126), 65 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:26:32,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 126 transitions. [2022-03-03 19:26:32,871 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 126 transitions. Word has length 20 [2022-03-03 19:26:32,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:26:32,872 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 126 transitions. [2022-03-03 19:26:32,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:26:32,872 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 126 transitions. [2022-03-03 19:26:32,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:26:32,872 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:26:32,872 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:26:32,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-03 19:26:33,089 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 [2022-03-03 19:26:33,089 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:26:33,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:26:33,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1508489523, now seen corresponding path program 4 times [2022-03-03 19:26:33,090 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:26:33,090 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132944890] [2022-03-03 19:26:33,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:26:33,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:26:33,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:26:33,140 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:26:33,140 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:26:33,140 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132944890] [2022-03-03 19:26:33,140 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132944890] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:26:33,141 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550606179] [2022-03-03 19:26:33,141 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:26:33,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:26:33,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:26:33,156 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) [2022-03-03 19:26:33,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-03 19:26:33,180 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:26:33,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:26:33,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-03 19:26:33,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:26:33,245 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:26:33,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:26:33,305 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:26:33,305 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550606179] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:26:33,305 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:26:33,306 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2022-03-03 19:26:33,306 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925474966] [2022-03-03 19:26:33,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:26:33,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-03 19:26:33,306 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:26:33,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-03 19:26:33,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:26:33,307 INFO L87 Difference]: Start difference. First operand 66 states and 126 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 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) [2022-03-03 19:26:33,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:26:33,332 INFO L93 Difference]: Finished difference Result 162 states and 309 transitions. [2022-03-03 19:26:33,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 19:26:33,333 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 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 [2022-03-03 19:26:33,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:26:33,334 INFO L225 Difference]: With dead ends: 162 [2022-03-03 19:26:33,334 INFO L226 Difference]: Without dead ends: 135 [2022-03-03 19:26:33,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:26:33,335 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 20 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:26:33,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 80 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:26:33,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-03-03 19:26:33,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 105. [2022-03-03 19:26:33,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.048076923076923) internal successors, (213), 104 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:26:33,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 213 transitions. [2022-03-03 19:26:33,338 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 213 transitions. Word has length 22 [2022-03-03 19:26:33,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:26:33,339 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 213 transitions. [2022-03-03 19:26:33,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 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) [2022-03-03 19:26:33,339 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 213 transitions. [2022-03-03 19:26:33,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:26:33,340 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:26:33,340 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:26:33,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-03 19:26:33,555 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 [2022-03-03 19:26:33,555 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:26:33,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:26:33,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1228681265, now seen corresponding path program 5 times [2022-03-03 19:26:33,556 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:26:33,556 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081234764] [2022-03-03 19:26:33,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:26:33,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:26:33,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:26:33,634 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:26:33,634 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:26:33,643 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081234764] [2022-03-03 19:26:33,643 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081234764] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:26:33,643 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976876215] [2022-03-03 19:26:33,643 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:26:33,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:26:33,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:26:33,644 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) [2022-03-03 19:26:33,667 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:26:33,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:26:33,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-03 19:26:33,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:26:33,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-03 19:26:33,804 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:26:33,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:26:33,885 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:26:33,886 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976876215] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:26:33,886 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:26:33,886 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-03-03 19:26:33,886 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389050533] [2022-03-03 19:26:33,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:26:33,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 19:26:33,886 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:26:33,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 19:26:33,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:26:33,887 INFO L87 Difference]: Start difference. First operand 105 states and 213 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 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) [2022-03-03 19:26:34,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:26:34,437 INFO L93 Difference]: Finished difference Result 383 states and 726 transitions. [2022-03-03 19:26:34,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-03 19:26:34,437 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 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 24 [2022-03-03 19:26:34,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:26:34,439 INFO L225 Difference]: With dead ends: 383 [2022-03-03 19:26:34,439 INFO L226 Difference]: Without dead ends: 347 [2022-03-03 19:26:34,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=652, Invalid=1798, Unknown=0, NotChecked=0, Total=2450 [2022-03-03 19:26:34,440 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 225 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:26:34,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 116 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:26:34,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-03-03 19:26:34,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 92. [2022-03-03 19:26:34,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.967032967032967) internal successors, (179), 91 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:26:34,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 179 transitions. [2022-03-03 19:26:34,444 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 179 transitions. Word has length 24 [2022-03-03 19:26:34,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:26:34,444 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 179 transitions. [2022-03-03 19:26:34,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 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) [2022-03-03 19:26:34,444 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 179 transitions. [2022-03-03 19:26:34,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:26:34,445 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:26:34,445 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:26:34,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-03 19:26:34,655 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 [2022-03-03 19:26:34,656 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:26:34,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:26:34,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1864859111, now seen corresponding path program 6 times [2022-03-03 19:26:34,656 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:26:34,656 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506436018] [2022-03-03 19:26:34,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:26:34,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:26:34,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:26:34,739 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:26:34,740 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:26:34,740 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506436018] [2022-03-03 19:26:34,740 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506436018] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:26:34,740 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983577093] [2022-03-03 19:26:34,740 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:26:34,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:26:34,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:26:34,741 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) [2022-03-03 19:26:34,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-03 19:26:34,781 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-03 19:26:34,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:26:34,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-03 19:26:34,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:26:34,915 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:26:34,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:26:35,015 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:26:35,015 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983577093] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:26:35,015 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:26:35,015 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 19 [2022-03-03 19:26:35,017 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116875784] [2022-03-03 19:26:35,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:26:35,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:26:35,018 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:26:35,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:26:35,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:26:35,019 INFO L87 Difference]: Start difference. First operand 92 states and 179 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:26:35,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:26:35,428 INFO L93 Difference]: Finished difference Result 239 states and 453 transitions. [2022-03-03 19:26:35,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-03 19:26:35,429 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:26:35,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:26:35,429 INFO L225 Difference]: With dead ends: 239 [2022-03-03 19:26:35,430 INFO L226 Difference]: Without dead ends: 235 [2022-03-03 19:26:35,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=539, Invalid=1267, Unknown=0, NotChecked=0, Total=1806 [2022-03-03 19:26:35,431 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 177 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:26:35,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 71 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:26:35,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-03-03 19:26:35,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 84. [2022-03-03 19:26:35,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.9759036144578312) internal successors, (164), 83 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:26:35,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 164 transitions. [2022-03-03 19:26:35,434 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 164 transitions. Word has length 24 [2022-03-03 19:26:35,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:26:35,434 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 164 transitions. [2022-03-03 19:26:35,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:26:35,434 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 164 transitions. [2022-03-03 19:26:35,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:26:35,435 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:26:35,435 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:26:35,452 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-03 19:26:35,643 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 [2022-03-03 19:26:35,643 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:26:35,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:26:35,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1276536081, now seen corresponding path program 7 times [2022-03-03 19:26:35,644 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:26:35,644 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212675009] [2022-03-03 19:26:35,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:26:35,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:26:35,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:26:35,698 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:26:35,698 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:26:35,698 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212675009] [2022-03-03 19:26:35,698 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212675009] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:26:35,698 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780053043] [2022-03-03 19:26:35,698 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:26:35,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:26:35,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:26:35,699 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) [2022-03-03 19:26:35,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:26:35,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-03 19:26:35,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:26:35,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-03 19:26:35,803 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:26:35,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:26:35,867 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:26:35,868 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780053043] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:26:35,868 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:26:35,868 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2022-03-03 19:26:35,868 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176200784] [2022-03-03 19:26:35,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:26:35,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-03 19:26:35,868 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:26:35,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-03 19:26:35,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-03 19:26:35,869 INFO L87 Difference]: Start difference. First operand 84 states and 164 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:26:35,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:26:35,905 INFO L93 Difference]: Finished difference Result 221 states and 426 transitions. [2022-03-03 19:26:35,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-03 19:26:35,905 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 19:26:35,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:26:35,908 INFO L225 Difference]: With dead ends: 221 [2022-03-03 19:26:35,908 INFO L226 Difference]: Without dead ends: 188 [2022-03-03 19:26:35,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-03 19:26:35,909 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 29 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:26:35,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 132 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:26:35,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-03-03 19:26:35,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 145. [2022-03-03 19:26:35,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.0833333333333335) internal successors, (300), 144 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:26:35,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 300 transitions. [2022-03-03 19:26:35,923 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 300 transitions. Word has length 26 [2022-03-03 19:26:35,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:26:35,923 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 300 transitions. [2022-03-03 19:26:35,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:26:35,923 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 300 transitions. [2022-03-03 19:26:35,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 19:26:35,927 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:26:35,927 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:26:35,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-03 19:26:36,149 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 [2022-03-03 19:26:36,149 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:26:36,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:26:36,149 INFO L85 PathProgramCache]: Analyzing trace with hash 923558637, now seen corresponding path program 8 times [2022-03-03 19:26:36,150 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:26:36,150 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815412335] [2022-03-03 19:26:36,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:26:36,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:26:36,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:26:36,256 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:26:36,257 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:26:36,257 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815412335] [2022-03-03 19:26:36,257 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815412335] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:26:36,257 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920292009] [2022-03-03 19:26:36,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:26:36,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:26:36,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:26:36,258 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) [2022-03-03 19:26:36,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-03 19:26:36,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:26:36,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:26:36,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-03 19:26:36,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:26:36,467 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:26:36,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:26:36,581 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:26:36,581 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920292009] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:26:36,581 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:26:36,581 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 25 [2022-03-03 19:26:36,581 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584324359] [2022-03-03 19:26:36,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:26:36,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:26:36,582 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:26:36,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:26:36,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:26:36,583 INFO L87 Difference]: Start difference. First operand 145 states and 300 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 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) [2022-03-03 19:26:37,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:26:37,486 INFO L93 Difference]: Finished difference Result 613 states and 1172 transitions. [2022-03-03 19:26:37,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-03 19:26:37,487 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 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 28 [2022-03-03 19:26:37,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:26:37,489 INFO L225 Difference]: With dead ends: 613 [2022-03-03 19:26:37,489 INFO L226 Difference]: Without dead ends: 520 [2022-03-03 19:26:37,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1341 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1238, Invalid=3592, Unknown=0, NotChecked=0, Total=4830 [2022-03-03 19:26:37,491 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 385 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:26:37,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [385 Valid, 137 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:26:37,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-03-03 19:26:37,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 114. [2022-03-03 19:26:37,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.991150442477876) internal successors, (225), 113 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:26:37,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 225 transitions. [2022-03-03 19:26:37,496 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 225 transitions. Word has length 28 [2022-03-03 19:26:37,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:26:37,496 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 225 transitions. [2022-03-03 19:26:37,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 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) [2022-03-03 19:26:37,496 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 225 transitions. [2022-03-03 19:26:37,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 19:26:37,497 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:26:37,497 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:26:37,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-03 19:26:37,711 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 [2022-03-03 19:26:37,711 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:26:37,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:26:37,712 INFO L85 PathProgramCache]: Analyzing trace with hash -805165081, now seen corresponding path program 9 times [2022-03-03 19:26:37,712 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:26:37,712 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147046409] [2022-03-03 19:26:37,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:26:37,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:26:37,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:26:37,796 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:26:37,797 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:26:37,797 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147046409] [2022-03-03 19:26:37,797 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147046409] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:26:37,797 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811700702] [2022-03-03 19:26:37,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:26:37,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:26:37,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:26:37,812 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) [2022-03-03 19:26:37,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-03 19:26:37,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-03 19:26:37,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:26:37,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-03 19:26:37,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:26:38,007 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:26:38,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:26:38,148 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:26:38,149 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811700702] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:26:38,149 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:26:38,149 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 24 [2022-03-03 19:26:38,149 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372982689] [2022-03-03 19:26:38,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:26:38,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:26:38,149 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:26:38,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:26:38,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:26:38,150 INFO L87 Difference]: Start difference. First operand 114 states and 225 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) [2022-03-03 19:26:38,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:26:38,720 INFO L93 Difference]: Finished difference Result 351 states and 677 transitions. [2022-03-03 19:26:38,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-03 19:26:38,720 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 28 [2022-03-03 19:26:38,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:26:38,721 INFO L225 Difference]: With dead ends: 351 [2022-03-03 19:26:38,721 INFO L226 Difference]: Without dead ends: 347 [2022-03-03 19:26:38,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 925 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=981, Invalid=2441, Unknown=0, NotChecked=0, Total=3422 [2022-03-03 19:26:38,723 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 268 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:26:38,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 59 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:26:38,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-03-03 19:26:38,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 102. [2022-03-03 19:26:38,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.0) internal successors, (202), 101 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:26:38,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 202 transitions. [2022-03-03 19:26:38,727 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 202 transitions. Word has length 28 [2022-03-03 19:26:38,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:26:38,727 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 202 transitions. [2022-03-03 19:26:38,727 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) [2022-03-03 19:26:38,727 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 202 transitions. [2022-03-03 19:26:38,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:26:38,728 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:26:38,728 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:26:38,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-03 19:26:38,941 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 [2022-03-03 19:26:38,942 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:26:38,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:26:38,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1853361835, now seen corresponding path program 10 times [2022-03-03 19:26:38,942 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:26:38,942 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306816265] [2022-03-03 19:26:38,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:26:38,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:26:38,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:26:39,022 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:26:39,022 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:26:39,022 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306816265] [2022-03-03 19:26:39,022 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306816265] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:26:39,022 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452627548] [2022-03-03 19:26:39,022 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:26:39,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:26:39,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:26:39,023 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) [2022-03-03 19:26:39,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-03 19:26:39,051 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:26:39,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:26:39,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-03 19:26:39,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:26:39,149 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:26:39,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:26:39,243 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:26:39,243 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452627548] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:26:39,243 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:26:39,243 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2022-03-03 19:26:39,245 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970572581] [2022-03-03 19:26:39,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:26:39,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-03 19:26:39,245 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:26:39,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-03 19:26:39,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-03 19:26:39,245 INFO L87 Difference]: Start difference. First operand 102 states and 202 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:26:39,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:26:39,303 INFO L93 Difference]: Finished difference Result 280 states and 543 transitions. [2022-03-03 19:26:39,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-03 19:26:39,303 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:26:39,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:26:39,304 INFO L225 Difference]: With dead ends: 280 [2022-03-03 19:26:39,304 INFO L226 Difference]: Without dead ends: 241 [2022-03-03 19:26:39,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 61 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-03 19:26:39,305 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 38 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:26:39,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 198 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:26:39,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-03-03 19:26:39,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 185. [2022-03-03 19:26:39,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.1032608695652173) internal successors, (387), 184 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:26:39,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 387 transitions. [2022-03-03 19:26:39,308 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 387 transitions. Word has length 30 [2022-03-03 19:26:39,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:26:39,308 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 387 transitions. [2022-03-03 19:26:39,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:26:39,309 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 387 transitions. [2022-03-03 19:26:39,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:26:39,309 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:26:39,309 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:26:39,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-03 19:26:39,519 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 [2022-03-03 19:26:39,519 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:26:39,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:26:39,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1831163991, now seen corresponding path program 11 times [2022-03-03 19:26:39,520 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:26:39,520 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74926366] [2022-03-03 19:26:39,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:26:39,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:26:39,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:26:39,659 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:26:39,660 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:26:39,660 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74926366] [2022-03-03 19:26:39,660 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74926366] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:26:39,660 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480642487] [2022-03-03 19:26:39,660 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:26:39,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:26:39,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:26:39,661 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) [2022-03-03 19:26:39,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-03 19:26:39,704 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-03 19:26:39,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:26:39,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-03 19:26:39,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:26:39,923 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:26:39,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:26:40,067 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:26:40,067 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480642487] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:26:40,067 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:26:40,067 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-03-03 19:26:40,067 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759918316] [2022-03-03 19:26:40,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:26:40,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 19:26:40,068 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:26:40,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 19:26:40,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=734, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:26:40,069 INFO L87 Difference]: Start difference. First operand 185 states and 387 transitions. Second operand has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 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) [2022-03-03 19:26:41,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:26:41,351 INFO L93 Difference]: Finished difference Result 889 states and 1704 transitions. [2022-03-03 19:26:41,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-03 19:26:41,352 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 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 32 [2022-03-03 19:26:41,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:26:41,354 INFO L225 Difference]: With dead ends: 889 [2022-03-03 19:26:41,354 INFO L226 Difference]: Without dead ends: 724 [2022-03-03 19:26:41,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2535 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2144, Invalid=6412, Unknown=0, NotChecked=0, Total=8556 [2022-03-03 19:26:41,356 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 372 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:26:41,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 160 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:26:41,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2022-03-03 19:26:41,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 136. [2022-03-03 19:26:41,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.0074074074074075) internal successors, (271), 135 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:26:41,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 271 transitions. [2022-03-03 19:26:41,361 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 271 transitions. Word has length 32 [2022-03-03 19:26:41,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:26:41,361 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 271 transitions. [2022-03-03 19:26:41,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 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) [2022-03-03 19:26:41,361 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 271 transitions. [2022-03-03 19:26:41,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:26:41,361 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:26:41,361 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:26:41,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-03 19:26:41,588 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 [2022-03-03 19:26:41,589 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:26:41,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:26:41,589 INFO L85 PathProgramCache]: Analyzing trace with hash 102376167, now seen corresponding path program 12 times [2022-03-03 19:26:41,589 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:26:41,589 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416976016] [2022-03-03 19:26:41,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:26:41,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:26:41,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:26:41,659 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:26:41,660 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:26:41,660 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416976016] [2022-03-03 19:26:41,660 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416976016] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:26:41,660 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83834457] [2022-03-03 19:26:41,660 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:26:41,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:26:41,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:26:41,661 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) [2022-03-03 19:26:41,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-03 19:26:41,684 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-03 19:26:41,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:26:41,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-03 19:26:41,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:26:41,938 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:26:41,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:26:42,130 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:26:42,131 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83834457] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:26:42,131 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:26:42,131 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 29 [2022-03-03 19:26:42,131 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890206742] [2022-03-03 19:26:42,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:26:42,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 19:26:42,131 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:26:42,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 19:26:42,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=635, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:26:42,132 INFO L87 Difference]: Start difference. First operand 136 states and 271 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 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) [2022-03-03 19:26:43,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:26:43,088 INFO L93 Difference]: Finished difference Result 485 states and 945 transitions. [2022-03-03 19:26:43,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-03 19:26:43,088 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 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 32 [2022-03-03 19:26:43,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:26:43,090 INFO L225 Difference]: With dead ends: 485 [2022-03-03 19:26:43,090 INFO L226 Difference]: Without dead ends: 481 [2022-03-03 19:26:43,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1685 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1634, Invalid=4218, Unknown=0, NotChecked=0, Total=5852 [2022-03-03 19:26:43,091 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 356 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:26:43,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 85 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:26:43,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2022-03-03 19:26:43,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 120. [2022-03-03 19:26:43,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.0168067226890756) internal successors, (240), 119 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:26:43,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 240 transitions. [2022-03-03 19:26:43,095 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 240 transitions. Word has length 32 [2022-03-03 19:26:43,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:26:43,095 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 240 transitions. [2022-03-03 19:26:43,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 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) [2022-03-03 19:26:43,096 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 240 transitions. [2022-03-03 19:26:43,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-03 19:26:43,096 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:26:43,096 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:26:43,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-03 19:26:43,312 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 [2022-03-03 19:26:43,313 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:26:43,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:26:43,313 INFO L85 PathProgramCache]: Analyzing trace with hash 264770663, now seen corresponding path program 13 times [2022-03-03 19:26:43,313 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:26:43,313 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258800080] [2022-03-03 19:26:43,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:26:43,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:26:43,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:26:43,401 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:26:43,401 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:26:43,401 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258800080] [2022-03-03 19:26:43,401 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258800080] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:26:43,401 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558979758] [2022-03-03 19:26:43,401 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:26:43,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:26:43,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:26:43,402 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) [2022-03-03 19:26:43,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-03 19:26:43,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:26:43,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-03 19:26:43,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:26:43,509 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:26:43,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:26:43,592 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:26:43,593 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558979758] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:26:43,593 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:26:43,593 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 8 [2022-03-03 19:26:43,593 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195415198] [2022-03-03 19:26:43,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:26:43,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-03 19:26:43,593 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:26:43,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-03 19:26:43,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-03-03 19:26:43,594 INFO L87 Difference]: Start difference. First operand 120 states and 240 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:26:43,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:26:43,650 INFO L93 Difference]: Finished difference Result 339 states and 660 transitions. [2022-03-03 19:26:43,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-03 19:26:43,650 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-03 19:26:43,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:26:43,652 INFO L225 Difference]: With dead ends: 339 [2022-03-03 19:26:43,652 INFO L226 Difference]: Without dead ends: 294 [2022-03-03 19:26:43,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-03-03 19:26:43,653 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 47 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:26:43,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 278 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:26:43,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-03-03 19:26:43,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 225. [2022-03-03 19:26:43,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.1160714285714284) internal successors, (474), 224 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:26:43,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 474 transitions. [2022-03-03 19:26:43,664 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 474 transitions. Word has length 34 [2022-03-03 19:26:43,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:26:43,664 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 474 transitions. [2022-03-03 19:26:43,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:26:43,664 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 474 transitions. [2022-03-03 19:26:43,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-03 19:26:43,665 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:26:43,665 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:26:43,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-03 19:26:43,881 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 [2022-03-03 19:26:43,881 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:26:43,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:26:43,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1625686427, now seen corresponding path program 14 times [2022-03-03 19:26:43,882 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:26:43,882 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078731430] [2022-03-03 19:26:43,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:26:43,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:26:43,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:26:44,026 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:26:44,026 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:26:44,026 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078731430] [2022-03-03 19:26:44,026 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078731430] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:26:44,026 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096668792] [2022-03-03 19:26:44,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:26:44,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:26:44,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:26:44,028 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) [2022-03-03 19:26:44,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-03 19:26:44,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:26:44,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:26:44,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-03 19:26:44,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:26:44,331 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:26:44,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:26:44,497 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:26:44,498 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096668792] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:26:44,498 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:26:44,498 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 35 [2022-03-03 19:26:44,498 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23228189] [2022-03-03 19:26:44,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:26:44,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-03 19:26:44,498 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:26:44,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-03 19:26:44,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=1003, Unknown=0, NotChecked=0, Total=1260 [2022-03-03 19:26:44,499 INFO L87 Difference]: Start difference. First operand 225 states and 474 transitions. Second operand has 36 states, 36 states have (on average 2.25) internal successors, (81), 35 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) [2022-03-03 19:26:46,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:26:46,341 INFO L93 Difference]: Finished difference Result 1205 states and 2312 transitions. [2022-03-03 19:26:46,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-03-03 19:26:46,342 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.25) internal successors, (81), 35 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 36 [2022-03-03 19:26:46,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:26:46,344 INFO L225 Difference]: With dead ends: 1205 [2022-03-03 19:26:46,344 INFO L226 Difference]: Without dead ends: 956 [2022-03-03 19:26:46,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4408 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3470, Invalid=10572, Unknown=0, NotChecked=0, Total=14042 [2022-03-03 19:26:46,347 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 455 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 982 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 1092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:26:46,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [455 Valid, 197 Invalid, 1092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 982 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 19:26:46,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2022-03-03 19:26:46,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 158. [2022-03-03 19:26:46,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.0191082802547773) internal successors, (317), 157 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:26:46,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 317 transitions. [2022-03-03 19:26:46,357 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 317 transitions. Word has length 36 [2022-03-03 19:26:46,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:26:46,372 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 317 transitions. [2022-03-03 19:26:46,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.25) internal successors, (81), 35 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) [2022-03-03 19:26:46,372 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 317 transitions. [2022-03-03 19:26:46,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-03 19:26:46,372 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:26:46,372 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:26:46,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-03 19:26:46,573 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 [2022-03-03 19:26:46,573 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:26:46,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:26:46,573 INFO L85 PathProgramCache]: Analyzing trace with hash -2129744153, now seen corresponding path program 15 times [2022-03-03 19:26:46,573 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:26:46,573 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997980193] [2022-03-03 19:26:46,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:26:46,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:26:46,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:26:46,676 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:26:46,677 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:26:46,677 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997980193] [2022-03-03 19:26:46,677 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997980193] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:26:46,677 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970605593] [2022-03-03 19:26:46,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:26:46,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:26:46,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:26:46,678 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) [2022-03-03 19:26:46,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-03 19:26:46,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-03-03 19:26:46,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:26:46,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-03 19:26:46,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:26:46,992 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:26:46,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:26:47,262 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:26:47,262 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970605593] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:26:47,262 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:26:47,262 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 15] total 34 [2022-03-03 19:26:47,262 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270303562] [2022-03-03 19:26:47,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:26:47,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-03 19:26:47,262 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:26:47,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-03 19:26:47,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=876, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 19:26:47,263 INFO L87 Difference]: Start difference. First operand 158 states and 317 transitions. Second operand has 35 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:26:48,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:26:48,510 INFO L93 Difference]: Finished difference Result 641 states and 1257 transitions. [2022-03-03 19:26:48,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-03 19:26:48,511 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-03 19:26:48,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:26:48,512 INFO L225 Difference]: With dead ends: 641 [2022-03-03 19:26:48,512 INFO L226 Difference]: Without dead ends: 637 [2022-03-03 19:26:48,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2833 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2553, Invalid=6759, Unknown=0, NotChecked=0, Total=9312 [2022-03-03 19:26:48,515 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 432 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:26:48,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [432 Valid, 85 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:26:48,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2022-03-03 19:26:48,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 138. [2022-03-03 19:26:48,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.0291970802919708) internal successors, (278), 137 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:26:48,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 278 transitions. [2022-03-03 19:26:48,521 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 278 transitions. Word has length 36 [2022-03-03 19:26:48,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:26:48,521 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 278 transitions. [2022-03-03 19:26:48,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:26:48,521 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 278 transitions. [2022-03-03 19:26:48,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-03 19:26:48,521 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:26:48,521 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:26:48,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-03 19:26:48,737 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 [2022-03-03 19:26:48,738 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:26:48,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:26:48,738 INFO L85 PathProgramCache]: Analyzing trace with hash 160214051, now seen corresponding path program 16 times [2022-03-03 19:26:48,738 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:26:48,738 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039643142] [2022-03-03 19:26:48,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:26:48,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:26:48,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:26:48,807 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:26:48,807 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:26:48,807 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039643142] [2022-03-03 19:26:48,807 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039643142] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:26:48,807 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267807850] [2022-03-03 19:26:48,807 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:26:48,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:26:48,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:26:48,808 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) [2022-03-03 19:26:48,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-03 19:26:48,831 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:26:48,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:26:48,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 19:26:48,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:26:48,937 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:26:48,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:26:49,034 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:26:49,034 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267807850] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:26:49,034 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:26:49,034 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 9 [2022-03-03 19:26:49,035 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102043015] [2022-03-03 19:26:49,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:26:49,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-03 19:26:49,035 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:26:49,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-03 19:26:49,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-03-03 19:26:49,035 INFO L87 Difference]: Start difference. First operand 138 states and 278 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:26:49,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:26:49,136 INFO L93 Difference]: Finished difference Result 398 states and 777 transitions. [2022-03-03 19:26:49,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-03 19:26:49,137 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-03-03 19:26:49,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:26:49,138 INFO L225 Difference]: With dead ends: 398 [2022-03-03 19:26:49,138 INFO L226 Difference]: Without dead ends: 347 [2022-03-03 19:26:49,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 79 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-03-03 19:26:49,139 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 56 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:26:49,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 372 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:26:49,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-03-03 19:26:49,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 265. [2022-03-03 19:26:49,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.125) internal successors, (561), 264 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:26:49,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 561 transitions. [2022-03-03 19:26:49,145 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 561 transitions. Word has length 38 [2022-03-03 19:26:49,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:26:49,145 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 561 transitions. [2022-03-03 19:26:49,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:26:49,145 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 561 transitions. [2022-03-03 19:26:49,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-03 19:26:49,145 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:26:49,145 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:26:49,165 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-03-03 19:26:49,360 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 [2022-03-03 19:26:49,360 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:26:49,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:26:49,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1774020385, now seen corresponding path program 17 times [2022-03-03 19:26:49,361 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:26:49,361 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921690039] [2022-03-03 19:26:49,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:26:49,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:26:49,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:26:49,510 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:26:49,510 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:26:49,510 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921690039] [2022-03-03 19:26:49,510 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921690039] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:26:49,511 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645224328] [2022-03-03 19:26:49,511 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:26:49,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:26:49,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:26:49,512 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) [2022-03-03 19:26:49,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-03 19:26:49,545 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-03-03 19:26:49,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:26:49,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-03 19:26:49,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:26:49,799 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:26:49,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:26:49,939 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:26:49,939 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645224328] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:26:49,953 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:26:49,953 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 40 [2022-03-03 19:26:49,954 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547719032] [2022-03-03 19:26:49,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:26:49,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:26:49,954 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:26:49,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:26:49,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=1314, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:26:49,956 INFO L87 Difference]: Start difference. First operand 265 states and 561 transitions. Second operand has 41 states, 41 states have (on average 2.2195121951219514) internal successors, (91), 40 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:26:51,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:26:51,832 INFO L93 Difference]: Finished difference Result 1561 states and 2996 transitions. [2022-03-03 19:26:51,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-03-03 19:26:51,832 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.2195121951219514) internal successors, (91), 40 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-03-03 19:26:51,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:26:51,843 INFO L225 Difference]: With dead ends: 1561 [2022-03-03 19:26:51,843 INFO L226 Difference]: Without dead ends: 1216 [2022-03-03 19:26:51,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7201 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=5330, Invalid=16426, Unknown=0, NotChecked=0, Total=21756 [2022-03-03 19:26:51,846 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 540 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 1073 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 1192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 1073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:26:51,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [540 Valid, 218 Invalid, 1192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1073 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:26:51,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1216 states. [2022-03-03 19:26:51,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1216 to 180. [2022-03-03 19:26:51,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.0279329608938546) internal successors, (363), 179 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:26:51,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 363 transitions. [2022-03-03 19:26:51,873 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 363 transitions. Word has length 40 [2022-03-03 19:26:51,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:26:51,873 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 363 transitions. [2022-03-03 19:26:51,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.2195121951219514) internal successors, (91), 40 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:26:51,873 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 363 transitions. [2022-03-03 19:26:51,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-03 19:26:51,873 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:26:51,874 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:26:51,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-03 19:26:52,097 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 [2022-03-03 19:26:52,098 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:26:52,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:26:52,098 INFO L85 PathProgramCache]: Analyzing trace with hash -504427545, now seen corresponding path program 18 times [2022-03-03 19:26:52,098 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:26:52,098 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183883724] [2022-03-03 19:26:52,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:26:52,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:26:52,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:26:52,213 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:26:52,213 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:26:52,213 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183883724] [2022-03-03 19:26:52,213 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183883724] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:26:52,213 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911655588] [2022-03-03 19:26:52,214 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:26:52,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:26:52,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:26:52,216 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) [2022-03-03 19:26:52,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-03 19:26:52,249 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-03 19:26:52,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:26:52,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-03 19:26:52,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:26:52,482 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:26:52,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:26:52,657 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:26:52,660 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911655588] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:26:52,660 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:26:52,660 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17, 17] total 39 [2022-03-03 19:26:52,661 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481552941] [2022-03-03 19:26:52,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:26:52,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-03 19:26:52,661 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:26:52,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-03 19:26:52,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=1156, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 19:26:52,662 INFO L87 Difference]: Start difference. First operand 180 states and 363 transitions. Second operand has 40 states, 40 states have (on average 2.45) internal successors, (98), 39 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:26:53,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:26:53,827 INFO L93 Difference]: Finished difference Result 819 states and 1613 transitions. [2022-03-03 19:26:53,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-03-03 19:26:53,827 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.45) internal successors, (98), 39 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-03-03 19:26:53,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:26:53,830 INFO L225 Difference]: With dead ends: 819 [2022-03-03 19:26:53,830 INFO L226 Difference]: Without dead ends: 815 [2022-03-03 19:26:53,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4486 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3799, Invalid=10243, Unknown=0, NotChecked=0, Total=14042 [2022-03-03 19:26:53,842 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 394 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:26:53,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [394 Valid, 100 Invalid, 863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:26:53,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2022-03-03 19:26:53,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 156. [2022-03-03 19:26:53,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.0387096774193547) internal successors, (316), 155 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:26:53,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 316 transitions. [2022-03-03 19:26:53,866 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 316 transitions. Word has length 40 [2022-03-03 19:26:53,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:26:53,866 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 316 transitions. [2022-03-03 19:26:53,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.45) internal successors, (98), 39 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:26:53,866 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 316 transitions. [2022-03-03 19:26:53,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-03 19:26:53,866 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:26:53,866 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:26:53,899 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-03-03 19:26:54,102 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 [2022-03-03 19:26:54,102 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:26:54,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:26:54,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1191651873, now seen corresponding path program 19 times [2022-03-03 19:26:54,103 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:26:54,103 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207043318] [2022-03-03 19:26:54,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:26:54,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:26:54,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:26:54,190 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:26:54,190 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:26:54,190 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207043318] [2022-03-03 19:26:54,190 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207043318] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:26:54,190 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048245108] [2022-03-03 19:26:54,190 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:26:54,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:26:54,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:26:54,191 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) [2022-03-03 19:26:54,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-03 19:26:54,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:26:54,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-03 19:26:54,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:26:54,348 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:26:54,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:26:54,450 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:26:54,450 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048245108] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:26:54,450 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:26:54,450 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 10 [2022-03-03 19:26:54,450 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963261418] [2022-03-03 19:26:54,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:26:54,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 19:26:54,451 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:26:54,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 19:26:54,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-03-03 19:26:54,451 INFO L87 Difference]: Start difference. First operand 156 states and 316 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:26:54,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:26:54,555 INFO L93 Difference]: Finished difference Result 457 states and 894 transitions. [2022-03-03 19:26:54,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 19:26:54,556 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-03-03 19:26:54,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:26:54,557 INFO L225 Difference]: With dead ends: 457 [2022-03-03 19:26:54,557 INFO L226 Difference]: Without dead ends: 400 [2022-03-03 19:26:54,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 88 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-03-03 19:26:54,558 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 65 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:26:54,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 480 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:26:54,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2022-03-03 19:26:54,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 305. [2022-03-03 19:26:54,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.1315789473684212) internal successors, (648), 304 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:26:54,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 648 transitions. [2022-03-03 19:26:54,588 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 648 transitions. Word has length 42 [2022-03-03 19:26:54,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:26:54,588 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 648 transitions. [2022-03-03 19:26:54,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:26:54,589 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 648 transitions. [2022-03-03 19:26:54,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-03 19:26:54,589 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:26:54,589 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:26:54,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-03 19:26:54,790 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 [2022-03-03 19:26:54,790 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:26:54,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:26:54,790 INFO L85 PathProgramCache]: Analyzing trace with hash -868752931, now seen corresponding path program 20 times [2022-03-03 19:26:54,790 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:26:54,790 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968099775] [2022-03-03 19:26:54,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:26:54,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:26:54,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:26:54,990 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:26:54,991 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:26:54,991 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968099775] [2022-03-03 19:26:54,991 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968099775] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:26:54,991 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19430377] [2022-03-03 19:26:54,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:26:54,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:26:54,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:26:54,992 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) [2022-03-03 19:26:54,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-03 19:26:55,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:26:55,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:26:55,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-03 19:26:55,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:26:55,407 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:26:55,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:26:55,637 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:26:55,637 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19430377] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:26:55,637 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:26:55,637 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 45 [2022-03-03 19:26:55,637 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734972919] [2022-03-03 19:26:55,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:26:55,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-03 19:26:55,638 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:26:55,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-03 19:26:55,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=403, Invalid=1667, Unknown=0, NotChecked=0, Total=2070 [2022-03-03 19:26:55,638 INFO L87 Difference]: Start difference. First operand 305 states and 648 transitions. Second operand has 46 states, 46 states have (on average 2.1956521739130435) internal successors, (101), 45 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:26:58,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:26:58,845 INFO L93 Difference]: Finished difference Result 1957 states and 3756 transitions. [2022-03-03 19:26:58,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-03-03 19:26:58,846 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.1956521739130435) internal successors, (101), 45 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-03-03 19:26:58,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:26:58,850 INFO L225 Difference]: With dead ends: 1957 [2022-03-03 19:26:58,850 INFO L226 Difference]: Without dead ends: 1504 [2022-03-03 19:26:58,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11183 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=7852, Invalid=24368, Unknown=0, NotChecked=0, Total=32220 [2022-03-03 19:26:58,853 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 597 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 1273 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 597 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 1415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 1273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:26:58,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [597 Valid, 227 Invalid, 1415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 1273 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 19:26:58,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1504 states. [2022-03-03 19:26:58,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1504 to 202. [2022-03-03 19:26:58,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.0348258706467663) internal successors, (409), 201 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:26:58,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 409 transitions. [2022-03-03 19:26:58,861 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 409 transitions. Word has length 44 [2022-03-03 19:26:58,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:26:58,861 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 409 transitions. [2022-03-03 19:26:58,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.1956521739130435) internal successors, (101), 45 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:26:58,861 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 409 transitions. [2022-03-03 19:26:58,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-03 19:26:58,861 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:26:58,862 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:26:58,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-03 19:26:59,075 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 [2022-03-03 19:26:59,075 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:26:59,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:26:59,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1060796903, now seen corresponding path program 21 times [2022-03-03 19:26:59,076 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:26:59,076 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126643060] [2022-03-03 19:26:59,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:26:59,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:26:59,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:26:59,202 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 57 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:26:59,203 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:26:59,203 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126643060] [2022-03-03 19:26:59,203 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126643060] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:26:59,203 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422002240] [2022-03-03 19:26:59,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:26:59,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:26:59,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:26:59,204 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) [2022-03-03 19:26:59,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-03 19:26:59,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-03-03 19:26:59,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:26:59,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-03 19:26:59,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:26:59,617 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 57 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:26:59,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:26:59,929 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:26:59,929 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422002240] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:26:59,929 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:26:59,929 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19, 19] total 44 [2022-03-03 19:26:59,929 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43306226] [2022-03-03 19:26:59,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:26:59,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-03 19:26:59,930 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:26:59,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-03 19:26:59,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=505, Invalid=1475, Unknown=0, NotChecked=0, Total=1980 [2022-03-03 19:26:59,934 INFO L87 Difference]: Start difference. First operand 202 states and 409 transitions. Second operand has 45 states, 45 states have (on average 2.4444444444444446) internal successors, (110), 44 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:27:01,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:27:01,434 INFO L93 Difference]: Finished difference Result 1019 states and 2013 transitions. [2022-03-03 19:27:01,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-03-03 19:27:01,434 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.4444444444444446) internal successors, (110), 44 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-03-03 19:27:01,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:27:01,437 INFO L225 Difference]: With dead ends: 1019 [2022-03-03 19:27:01,437 INFO L226 Difference]: Without dead ends: 1015 [2022-03-03 19:27:01,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6777 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=5439, Invalid=14867, Unknown=0, NotChecked=0, Total=20306 [2022-03-03 19:27:01,442 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 761 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 761 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:27:01,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [761 Valid, 105 Invalid, 955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 768 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:27:01,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1015 states. [2022-03-03 19:27:01,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1015 to 174. [2022-03-03 19:27:01,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.046242774566474) internal successors, (354), 173 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:27:01,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 354 transitions. [2022-03-03 19:27:01,461 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 354 transitions. Word has length 44 [2022-03-03 19:27:01,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:27:01,461 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 354 transitions. [2022-03-03 19:27:01,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.4444444444444446) internal successors, (110), 44 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:27:01,462 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 354 transitions. [2022-03-03 19:27:01,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-03 19:27:01,462 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:27:01,462 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:27:01,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-03 19:27:01,662 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 [2022-03-03 19:27:01,663 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:27:01,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:27:01,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1723830683, now seen corresponding path program 22 times [2022-03-03 19:27:01,663 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:27:01,663 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006834772] [2022-03-03 19:27:01,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:27:01,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:27:01,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:27:01,765 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:27:01,765 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:27:01,765 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006834772] [2022-03-03 19:27:01,765 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006834772] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:27:01,765 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979080943] [2022-03-03 19:27:01,765 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:27:01,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:27:01,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:27:01,766 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) [2022-03-03 19:27:01,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-03 19:27:01,789 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:27:01,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:27:01,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:27:01,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:27:01,872 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:27:01,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:27:01,982 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:27:01,983 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979080943] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:27:01,983 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:27:01,983 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 11 [2022-03-03 19:27:01,983 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250170848] [2022-03-03 19:27:01,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:27:01,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-03 19:27:01,985 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:27:01,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-03 19:27:01,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-03-03 19:27:01,985 INFO L87 Difference]: Start difference. First operand 174 states and 354 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:27:02,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:27:02,146 INFO L93 Difference]: Finished difference Result 516 states and 1011 transitions. [2022-03-03 19:27:02,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 19:27:02,146 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-03-03 19:27:02,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:27:02,147 INFO L225 Difference]: With dead ends: 516 [2022-03-03 19:27:02,147 INFO L226 Difference]: Without dead ends: 453 [2022-03-03 19:27:02,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 97 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-03-03 19:27:02,148 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 74 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 602 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:27:02,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 602 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:27:02,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2022-03-03 19:27:02,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 345. [2022-03-03 19:27:02,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 2.136627906976744) internal successors, (735), 344 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:27:02,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 735 transitions. [2022-03-03 19:27:02,153 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 735 transitions. Word has length 46 [2022-03-03 19:27:02,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:27:02,153 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 735 transitions. [2022-03-03 19:27:02,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:27:02,153 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 735 transitions. [2022-03-03 19:27:02,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-03 19:27:02,154 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:27:02,154 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:27:02,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-03 19:27:02,367 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 [2022-03-03 19:27:02,367 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:27:02,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:27:02,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1803316889, now seen corresponding path program 23 times [2022-03-03 19:27:02,368 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:27:02,368 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996511599] [2022-03-03 19:27:02,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:27:02,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:27:02,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:27:02,572 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:27:02,573 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:27:02,573 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996511599] [2022-03-03 19:27:02,573 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996511599] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:27:02,573 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729375055] [2022-03-03 19:27:02,573 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:27:02,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:27:02,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:27:02,574 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) [2022-03-03 19:27:02,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-03 19:27:02,608 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-03-03 19:27:02,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:27:02,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-03 19:27:02,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:27:02,900 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:27:02,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:27:03,068 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:27:03,068 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729375055] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:27:03,068 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:27:03,068 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 50 [2022-03-03 19:27:03,068 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517852563] [2022-03-03 19:27:03,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:27:03,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-03 19:27:03,069 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:27:03,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-03 19:27:03,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=488, Invalid=2062, Unknown=0, NotChecked=0, Total=2550 [2022-03-03 19:27:03,069 INFO L87 Difference]: Start difference. First operand 345 states and 735 transitions. Second operand has 51 states, 51 states have (on average 2.176470588235294) internal successors, (111), 50 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:27:06,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:27:06,617 INFO L93 Difference]: Finished difference Result 2393 states and 4592 transitions. [2022-03-03 19:27:06,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2022-03-03 19:27:06,618 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.176470588235294) internal successors, (111), 50 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-03-03 19:27:06,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:27:06,623 INFO L225 Difference]: With dead ends: 2393 [2022-03-03 19:27:06,623 INFO L226 Difference]: Without dead ends: 1820 [2022-03-03 19:27:06,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16669 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=11178, Invalid=34832, Unknown=0, NotChecked=0, Total=46010 [2022-03-03 19:27:06,626 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 744 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 1512 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 744 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 1678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:27:06,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [744 Valid, 265 Invalid, 1678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1512 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 19:27:06,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1820 states. [2022-03-03 19:27:06,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1820 to 224. [2022-03-03 19:27:06,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.0403587443946187) internal successors, (455), 223 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:27:06,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 455 transitions. [2022-03-03 19:27:06,634 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 455 transitions. Word has length 48 [2022-03-03 19:27:06,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:27:06,634 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 455 transitions. [2022-03-03 19:27:06,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.176470588235294) internal successors, (111), 50 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:27:06,634 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 455 transitions. [2022-03-03 19:27:06,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-03 19:27:06,635 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:27:06,635 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:27:06,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-03 19:27:06,851 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 [2022-03-03 19:27:06,851 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:27:06,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:27:06,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1759525095, now seen corresponding path program 24 times [2022-03-03 19:27:06,852 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:27:06,852 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588874427] [2022-03-03 19:27:06,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:27:06,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:27:06,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:27:06,980 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:27:06,981 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:27:06,981 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588874427] [2022-03-03 19:27:06,981 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588874427] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:27:06,981 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049501179] [2022-03-03 19:27:06,981 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:27:06,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:27:06,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:27:06,982 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) [2022-03-03 19:27:06,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-03 19:27:07,010 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-03-03 19:27:07,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:27:07,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-03 19:27:07,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:27:07,507 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:27:07,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:27:07,881 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:27:07,881 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049501179] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:27:07,881 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:27:07,881 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21, 21] total 49 [2022-03-03 19:27:07,881 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888877938] [2022-03-03 19:27:07,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:27:07,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-03 19:27:07,882 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:27:07,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-03 19:27:07,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=617, Invalid=1833, Unknown=0, NotChecked=0, Total=2450 [2022-03-03 19:27:07,882 INFO L87 Difference]: Start difference. First operand 224 states and 455 transitions. Second operand has 50 states, 50 states have (on average 2.44) internal successors, (122), 49 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:27:10,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:27:10,712 INFO L93 Difference]: Finished difference Result 1241 states and 2457 transitions. [2022-03-03 19:27:10,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-03-03 19:27:10,713 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.44) internal successors, (122), 49 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-03-03 19:27:10,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:27:10,716 INFO L225 Difference]: With dead ends: 1241 [2022-03-03 19:27:10,716 INFO L226 Difference]: Without dead ends: 1237 [2022-03-03 19:27:10,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9856 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=7546, Invalid=20846, Unknown=0, NotChecked=0, Total=28392 [2022-03-03 19:27:10,717 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 602 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 927 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:27:10,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [602 Valid, 110 Invalid, 1087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 927 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 19:27:10,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1237 states. [2022-03-03 19:27:10,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1237 to 192. [2022-03-03 19:27:10,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.0523560209424083) internal successors, (392), 191 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:27:10,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 392 transitions. [2022-03-03 19:27:10,723 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 392 transitions. Word has length 48 [2022-03-03 19:27:10,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:27:10,723 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 392 transitions. [2022-03-03 19:27:10,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.44) internal successors, (122), 49 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:27:10,723 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 392 transitions. [2022-03-03 19:27:10,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-03 19:27:10,724 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:27:10,724 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:27:10,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-03 19:27:10,940 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 [2022-03-03 19:27:10,940 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:27:10,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:27:10,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1192484695, now seen corresponding path program 25 times [2022-03-03 19:27:10,940 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:27:10,940 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676337190] [2022-03-03 19:27:10,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:27:10,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:27:10,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:27:11,068 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:27:11,068 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:27:11,068 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676337190] [2022-03-03 19:27:11,068 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676337190] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:27:11,068 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861727724] [2022-03-03 19:27:11,068 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:27:11,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:27:11,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:27:11,069 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) [2022-03-03 19:27:11,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-03 19:27:11,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:27:11,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-03 19:27:11,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:27:11,246 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:27:11,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:27:11,337 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:27:11,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861727724] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:27:11,337 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:27:11,337 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 12 [2022-03-03 19:27:11,337 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803258309] [2022-03-03 19:27:11,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:27:11,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-03 19:27:11,338 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:27:11,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-03 19:27:11,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-03-03 19:27:11,338 INFO L87 Difference]: Start difference. First operand 192 states and 392 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:27:11,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:27:11,460 INFO L93 Difference]: Finished difference Result 575 states and 1128 transitions. [2022-03-03 19:27:11,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:27:11,461 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-03-03 19:27:11,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:27:11,462 INFO L225 Difference]: With dead ends: 575 [2022-03-03 19:27:11,462 INFO L226 Difference]: Without dead ends: 506 [2022-03-03 19:27:11,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 106 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-03-03 19:27:11,463 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 83 mSDsluCounter, 944 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:27:11,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 738 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:27:11,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2022-03-03 19:27:11,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 385. [2022-03-03 19:27:11,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 2.140625) internal successors, (822), 384 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:27:11,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 822 transitions. [2022-03-03 19:27:11,468 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 822 transitions. Word has length 50 [2022-03-03 19:27:11,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:27:11,468 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 822 transitions. [2022-03-03 19:27:11,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:27:11,468 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 822 transitions. [2022-03-03 19:27:11,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-03 19:27:11,469 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:27:11,469 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:27:11,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-03 19:27:11,683 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 [2022-03-03 19:27:11,683 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:27:11,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:27:11,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1208087211, now seen corresponding path program 26 times [2022-03-03 19:27:11,684 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:27:11,684 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751150203] [2022-03-03 19:27:11,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:27:11,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:27:11,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:27:11,911 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:27:11,912 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:27:11,912 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751150203] [2022-03-03 19:27:11,912 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751150203] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:27:11,912 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488682029] [2022-03-03 19:27:11,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:27:11,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:27:11,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:27:11,923 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) [2022-03-03 19:27:11,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-03 19:27:11,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:27:11,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:27:11,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-03 19:27:11,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:27:12,509 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:27:12,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:27:12,805 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:27:12,805 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488682029] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:27:12,805 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:27:12,805 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 55 [2022-03-03 19:27:12,805 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014734331] [2022-03-03 19:27:12,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:27:12,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-03-03 19:27:12,806 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:27:12,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-03-03 19:27:12,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=581, Invalid=2499, Unknown=0, NotChecked=0, Total=3080 [2022-03-03 19:27:12,806 INFO L87 Difference]: Start difference. First operand 385 states and 822 transitions. Second operand has 56 states, 56 states have (on average 2.1607142857142856) internal successors, (121), 55 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:27:18,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:27:18,368 INFO L93 Difference]: Finished difference Result 2869 states and 5504 transitions. [2022-03-03 19:27:18,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 201 states. [2022-03-03 19:27:18,368 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.1607142857142856) internal successors, (121), 55 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-03-03 19:27:18,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:27:18,373 INFO L225 Difference]: With dead ends: 2869 [2022-03-03 19:27:18,374 INFO L226 Difference]: Without dead ends: 2164 [2022-03-03 19:27:18,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24003 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=15464, Invalid=48292, Unknown=0, NotChecked=0, Total=63756 [2022-03-03 19:27:18,381 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 746 mSDsluCounter, 706 mSDsCounter, 0 mSdLazyCounter, 1868 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 746 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 2048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 1868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 19:27:18,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [746 Valid, 325 Invalid, 2048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 1868 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-03 19:27:18,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2164 states. [2022-03-03 19:27:18,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2164 to 246. [2022-03-03 19:27:18,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.0448979591836736) internal successors, (501), 245 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:27:18,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 501 transitions. [2022-03-03 19:27:18,408 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 501 transitions. Word has length 52 [2022-03-03 19:27:18,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:27:18,408 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 501 transitions. [2022-03-03 19:27:18,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.1607142857142856) internal successors, (121), 55 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:27:18,411 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 501 transitions. [2022-03-03 19:27:18,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-03 19:27:18,411 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:27:18,411 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:27:18,428 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-03-03 19:27:18,628 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 [2022-03-03 19:27:18,628 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:27:18,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:27:18,629 INFO L85 PathProgramCache]: Analyzing trace with hash 742361319, now seen corresponding path program 27 times [2022-03-03 19:27:18,629 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:27:18,629 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500816365] [2022-03-03 19:27:18,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:27:18,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:27:18,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:27:18,791 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:27:18,792 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:27:18,792 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500816365] [2022-03-03 19:27:18,792 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500816365] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:27:18,792 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958978190] [2022-03-03 19:27:18,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:27:18,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:27:18,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:27:18,793 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) [2022-03-03 19:27:18,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-03 19:27:18,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-03-03 19:27:18,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:27:18,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-03 19:27:18,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:27:19,303 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:27:19,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:27:19,579 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:27:19,579 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958978190] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:27:19,579 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:27:19,580 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23, 23] total 54 [2022-03-03 19:27:19,580 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555622593] [2022-03-03 19:27:19,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:27:19,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-03 19:27:19,580 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:27:19,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-03 19:27:19,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=740, Invalid=2230, Unknown=0, NotChecked=0, Total=2970 [2022-03-03 19:27:19,581 INFO L87 Difference]: Start difference. First operand 246 states and 501 transitions. Second operand has 55 states, 55 states have (on average 2.4363636363636365) internal successors, (134), 54 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:27:22,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:27:22,434 INFO L93 Difference]: Finished difference Result 1485 states and 2945 transitions. [2022-03-03 19:27:22,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2022-03-03 19:27:22,434 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.4363636363636365) internal successors, (134), 54 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-03-03 19:27:22,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:27:22,438 INFO L225 Difference]: With dead ends: 1485 [2022-03-03 19:27:22,438 INFO L226 Difference]: Without dead ends: 1481 [2022-03-03 19:27:22,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13889 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=10199, Invalid=28413, Unknown=0, NotChecked=0, Total=38612 [2022-03-03 19:27:22,441 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 690 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 1108 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 690 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 1298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 1108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:27:22,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [690 Valid, 121 Invalid, 1298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 1108 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:27:22,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1481 states. [2022-03-03 19:27:22,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1481 to 210. [2022-03-03 19:27:22,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.0574162679425836) internal successors, (430), 209 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:27:22,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 430 transitions. [2022-03-03 19:27:22,455 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 430 transitions. Word has length 52 [2022-03-03 19:27:22,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:27:22,455 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 430 transitions. [2022-03-03 19:27:22,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.4363636363636365) internal successors, (134), 54 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:27:22,455 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 430 transitions. [2022-03-03 19:27:22,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-03 19:27:22,469 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:27:22,470 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:27:22,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-03 19:27:22,676 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 [2022-03-03 19:27:22,677 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:27:22,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:27:22,677 INFO L85 PathProgramCache]: Analyzing trace with hash 2041102099, now seen corresponding path program 28 times [2022-03-03 19:27:22,677 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:27:22,677 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461374916] [2022-03-03 19:27:22,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:27:22,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:27:22,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:27:22,822 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:27:22,822 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:27:22,822 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461374916] [2022-03-03 19:27:22,822 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461374916] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:27:22,822 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963504677] [2022-03-03 19:27:22,822 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:27:22,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:27:22,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:27:22,840 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) [2022-03-03 19:27:22,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-03 19:27:22,906 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:27:22,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:27:22,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-03 19:27:22,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:27:23,047 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:27:23,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:27:23,174 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:27:23,174 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963504677] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:27:23,174 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:27:23,174 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 13 [2022-03-03 19:27:23,174 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022124265] [2022-03-03 19:27:23,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:27:23,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 19:27:23,174 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:27:23,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 19:27:23,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-03-03 19:27:23,175 INFO L87 Difference]: Start difference. First operand 210 states and 430 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 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) [2022-03-03 19:27:23,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:27:23,321 INFO L93 Difference]: Finished difference Result 634 states and 1245 transitions. [2022-03-03 19:27:23,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:27:23,321 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 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 54 [2022-03-03 19:27:23,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:27:23,323 INFO L225 Difference]: With dead ends: 634 [2022-03-03 19:27:23,323 INFO L226 Difference]: Without dead ends: 559 [2022-03-03 19:27:23,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 115 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-03-03 19:27:23,324 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 92 mSDsluCounter, 1148 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 888 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:27:23,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 888 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:27:23,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2022-03-03 19:27:23,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 425. [2022-03-03 19:27:23,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 424 states have (on average 2.143867924528302) internal successors, (909), 424 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:27:23,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 909 transitions. [2022-03-03 19:27:23,329 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 909 transitions. Word has length 54 [2022-03-03 19:27:23,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:27:23,329 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 909 transitions. [2022-03-03 19:27:23,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 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) [2022-03-03 19:27:23,329 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 909 transitions. [2022-03-03 19:27:23,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-03 19:27:23,330 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:27:23,330 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:27:23,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-03 19:27:23,543 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 [2022-03-03 19:27:23,544 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:27:23,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:27:23,544 INFO L85 PathProgramCache]: Analyzing trace with hash -307249647, now seen corresponding path program 29 times [2022-03-03 19:27:23,544 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:27:23,544 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585206692] [2022-03-03 19:27:23,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:27:23,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:27:23,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:27:23,817 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:27:23,817 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:27:23,817 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585206692] [2022-03-03 19:27:23,818 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585206692] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:27:23,818 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803986140] [2022-03-03 19:27:23,818 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:27:23,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:27:23,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:27:23,828 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) [2022-03-03 19:27:23,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-03 19:27:23,858 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-03-03 19:27:23,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:27:23,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:27:23,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:27:24,436 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:27:24,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:27:24,660 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:27:24,660 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803986140] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:27:24,660 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:27:24,660 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 60 [2022-03-03 19:27:24,661 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597660571] [2022-03-03 19:27:24,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:27:24,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-03-03 19:27:24,661 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:27:24,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-03-03 19:27:24,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=682, Invalid=2978, Unknown=0, NotChecked=0, Total=3660 [2022-03-03 19:27:24,662 INFO L87 Difference]: Start difference. First operand 425 states and 909 transitions. Second operand has 61 states, 61 states have (on average 2.1475409836065573) internal successors, (131), 60 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:27:30,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:27:30,390 INFO L93 Difference]: Finished difference Result 3385 states and 6492 transitions. [2022-03-03 19:27:30,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 237 states. [2022-03-03 19:27:30,391 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.1475409836065573) internal successors, (131), 60 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-03-03 19:27:30,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:27:30,397 INFO L225 Difference]: With dead ends: 3385 [2022-03-03 19:27:30,397 INFO L226 Difference]: Without dead ends: 2536 [2022-03-03 19:27:30,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 292 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33575 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=20880, Invalid=65262, Unknown=0, NotChecked=0, Total=86142 [2022-03-03 19:27:30,402 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 861 mSDsluCounter, 779 mSDsCounter, 0 mSdLazyCounter, 2186 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 861 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 2372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 2186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 19:27:30,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [861 Valid, 341 Invalid, 2372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 2186 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-03 19:27:30,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2536 states. [2022-03-03 19:27:30,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2536 to 268. [2022-03-03 19:27:30,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 2.048689138576779) internal successors, (547), 267 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:27:30,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 547 transitions. [2022-03-03 19:27:30,412 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 547 transitions. Word has length 56 [2022-03-03 19:27:30,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:27:30,412 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 547 transitions. [2022-03-03 19:27:30,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.1475409836065573) internal successors, (131), 60 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:27:30,413 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 547 transitions. [2022-03-03 19:27:30,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-03 19:27:30,413 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:27:30,413 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:27:30,429 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-03-03 19:27:30,623 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 [2022-03-03 19:27:30,623 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:27:30,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:27:30,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1742231065, now seen corresponding path program 30 times [2022-03-03 19:27:30,623 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:27:30,623 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008301844] [2022-03-03 19:27:30,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:27:30,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:27:30,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:27:30,813 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 111 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:27:30,814 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:27:30,814 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008301844] [2022-03-03 19:27:30,814 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008301844] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:27:30,814 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19672664] [2022-03-03 19:27:30,814 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:27:30,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:27:30,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:27:30,815 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) [2022-03-03 19:27:30,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-03 19:27:30,861 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-03-03 19:27:30,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:27:30,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:27:30,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:27:31,496 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 111 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:27:31,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:27:32,011 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:27:32,011 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19672664] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:27:32,011 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:27:32,011 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 25, 25] total 59 [2022-03-03 19:27:32,011 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917733467] [2022-03-03 19:27:32,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:27:32,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-03-03 19:27:32,012 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:27:32,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-03-03 19:27:32,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=874, Invalid=2666, Unknown=0, NotChecked=0, Total=3540 [2022-03-03 19:27:32,013 INFO L87 Difference]: Start difference. First operand 268 states and 547 transitions. Second operand has 60 states, 60 states have (on average 2.433333333333333) internal successors, (146), 59 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:27:35,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:27:35,411 INFO L93 Difference]: Finished difference Result 1751 states and 3477 transitions. [2022-03-03 19:27:35,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2022-03-03 19:27:35,411 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.433333333333333) internal successors, (146), 59 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-03-03 19:27:35,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:27:35,415 INFO L225 Difference]: With dead ends: 1751 [2022-03-03 19:27:35,415 INFO L226 Difference]: Without dead ends: 1747 [2022-03-03 19:27:35,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19059 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=13483, Invalid=37819, Unknown=0, NotChecked=0, Total=51302 [2022-03-03 19:27:35,417 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 764 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 1146 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 764 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 1319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 1146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:27:35,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [764 Valid, 121 Invalid, 1319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 1146 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 19:27:35,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1747 states. [2022-03-03 19:27:35,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1747 to 228. [2022-03-03 19:27:35,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.0616740088105727) internal successors, (468), 227 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:27:35,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 468 transitions. [2022-03-03 19:27:35,424 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 468 transitions. Word has length 56 [2022-03-03 19:27:35,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:27:35,424 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 468 transitions. [2022-03-03 19:27:35,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.433333333333333) internal successors, (146), 59 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:27:35,425 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 468 transitions. [2022-03-03 19:27:35,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-03 19:27:35,425 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:27:35,425 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:27:35,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-03 19:27:35,641 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 [2022-03-03 19:27:35,641 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:27:35,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:27:35,642 INFO L85 PathProgramCache]: Analyzing trace with hash 162607311, now seen corresponding path program 31 times [2022-03-03 19:27:35,642 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:27:35,642 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648980594] [2022-03-03 19:27:35,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:27:35,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:27:35,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:27:35,786 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:27:35,786 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:27:35,786 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648980594] [2022-03-03 19:27:35,786 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648980594] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:27:35,786 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583301513] [2022-03-03 19:27:35,786 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:27:35,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:27:35,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:27:35,788 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) [2022-03-03 19:27:35,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-03 19:27:35,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:27:35,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-03 19:27:35,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:27:35,976 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:27:35,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:27:36,175 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:27:36,175 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583301513] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:27:36,175 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:27:36,175 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 14 [2022-03-03 19:27:36,175 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215549521] [2022-03-03 19:27:36,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:27:36,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-03 19:27:36,175 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:27:36,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-03 19:27:36,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2022-03-03 19:27:36,176 INFO L87 Difference]: Start difference. First operand 228 states and 468 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 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) [2022-03-03 19:27:36,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:27:36,450 INFO L93 Difference]: Finished difference Result 693 states and 1362 transitions. [2022-03-03 19:27:36,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:27:36,451 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 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 58 [2022-03-03 19:27:36,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:27:36,452 INFO L225 Difference]: With dead ends: 693 [2022-03-03 19:27:36,452 INFO L226 Difference]: Without dead ends: 612 [2022-03-03 19:27:36,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 124 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2022-03-03 19:27:36,452 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 101 mSDsluCounter, 1372 mSDsCounter, 0 mSdLazyCounter, 878 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 1052 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:27:36,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 1052 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 878 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:27:36,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2022-03-03 19:27:36,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 465. [2022-03-03 19:27:36,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 2.146551724137931) internal successors, (996), 464 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:27:36,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 996 transitions. [2022-03-03 19:27:36,458 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 996 transitions. Word has length 58 [2022-03-03 19:27:36,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:27:36,458 INFO L470 AbstractCegarLoop]: Abstraction has 465 states and 996 transitions. [2022-03-03 19:27:36,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 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) [2022-03-03 19:27:36,458 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 996 transitions. [2022-03-03 19:27:36,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-03 19:27:36,459 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:27:36,459 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:27:36,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-03 19:27:36,674 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 [2022-03-03 19:27:36,675 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:27:36,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:27:36,675 INFO L85 PathProgramCache]: Analyzing trace with hash 335839437, now seen corresponding path program 32 times [2022-03-03 19:27:36,675 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:27:36,675 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895169251] [2022-03-03 19:27:36,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:27:36,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:27:36,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:27:36,982 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:27:36,982 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:27:36,982 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895169251] [2022-03-03 19:27:36,982 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895169251] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:27:36,982 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683500938] [2022-03-03 19:27:36,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:27:36,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:27:36,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:27:36,983 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) [2022-03-03 19:27:36,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-03 19:27:37,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:27:37,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:27:37,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 19:27:37,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:27:37,688 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:27:37,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:27:37,963 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 144 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:27:37,963 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683500938] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:27:37,963 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:27:37,963 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 65 [2022-03-03 19:27:37,963 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821104619] [2022-03-03 19:27:37,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:27:37,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-03-03 19:27:37,964 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:27:37,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-03-03 19:27:37,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=791, Invalid=3499, Unknown=0, NotChecked=0, Total=4290 [2022-03-03 19:27:37,965 INFO L87 Difference]: Start difference. First operand 465 states and 996 transitions. Second operand has 66 states, 66 states have (on average 2.1363636363636362) internal successors, (141), 65 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:27:44,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:27:44,853 INFO L93 Difference]: Finished difference Result 3941 states and 7556 transitions. [2022-03-03 19:27:44,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 276 states. [2022-03-03 19:27:44,853 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.1363636363636362) internal successors, (141), 65 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-03-03 19:27:44,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:27:44,857 INFO L225 Difference]: With dead ends: 3941 [2022-03-03 19:27:44,857 INFO L226 Difference]: Without dead ends: 2936 [2022-03-03 19:27:44,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 336 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45804 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=27610, Invalid=86296, Unknown=0, NotChecked=0, Total=113906 [2022-03-03 19:27:44,863 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1146 mSDsluCounter, 995 mSDsCounter, 0 mSdLazyCounter, 2778 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1146 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 3029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 2778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 19:27:44,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1146 Valid, 437 Invalid, 3029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 2778 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-03 19:27:44,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2936 states. [2022-03-03 19:27:44,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2936 to 290. [2022-03-03 19:27:44,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.0519031141868513) internal successors, (593), 289 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:27:44,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 593 transitions. [2022-03-03 19:27:44,875 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 593 transitions. Word has length 60 [2022-03-03 19:27:44,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:27:44,875 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 593 transitions. [2022-03-03 19:27:44,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.1363636363636362) internal successors, (141), 65 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:27:44,875 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 593 transitions. [2022-03-03 19:27:44,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-03 19:27:44,876 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:27:44,876 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:27:44,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-03 19:27:45,092 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 [2022-03-03 19:27:45,092 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:27:45,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:27:45,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1087888359, now seen corresponding path program 33 times [2022-03-03 19:27:45,093 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:27:45,093 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733031818] [2022-03-03 19:27:45,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:27:45,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:27:45,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:27:45,292 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 133 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:27:45,292 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:27:45,292 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733031818] [2022-03-03 19:27:45,292 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733031818] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:27:45,292 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855862910] [2022-03-03 19:27:45,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:27:45,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:27:45,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:27:45,304 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) [2022-03-03 19:27:45,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-03 19:27:45,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-03-03 19:27:45,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:27:45,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 19:27:45,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:27:46,016 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 133 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:27:46,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:27:46,385 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 144 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:27:46,385 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855862910] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:27:46,385 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:27:46,385 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 27, 27] total 64 [2022-03-03 19:27:46,385 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636906613] [2022-03-03 19:27:46,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:27:46,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-03-03 19:27:46,386 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:27:46,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-03-03 19:27:46,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1019, Invalid=3141, Unknown=0, NotChecked=0, Total=4160 [2022-03-03 19:27:46,387 INFO L87 Difference]: Start difference. First operand 290 states and 593 transitions. Second operand has 65 states, 65 states have (on average 2.4307692307692306) internal successors, (158), 64 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:27:50,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:27:50,496 INFO L93 Difference]: Finished difference Result 2039 states and 4053 transitions. [2022-03-03 19:27:50,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 198 states. [2022-03-03 19:27:50,496 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.4307692307692306) internal successors, (158), 64 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-03-03 19:27:50,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:27:50,499 INFO L225 Difference]: With dead ends: 2039 [2022-03-03 19:27:50,499 INFO L226 Difference]: Without dead ends: 2035 [2022-03-03 19:27:50,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25565 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=17489, Invalid=49333, Unknown=0, NotChecked=0, Total=66822 [2022-03-03 19:27:50,504 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 683 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 1602 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 683 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 1757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 1602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:27:50,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [683 Valid, 166 Invalid, 1757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 1602 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 19:27:50,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2035 states. [2022-03-03 19:27:50,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2035 to 246. [2022-03-03 19:27:50,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.0653061224489795) internal successors, (506), 245 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:27:50,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 506 transitions. [2022-03-03 19:27:50,512 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 506 transitions. Word has length 60 [2022-03-03 19:27:50,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:27:50,512 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 506 transitions. [2022-03-03 19:27:50,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.4307692307692306) internal successors, (158), 64 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:27:50,512 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 506 transitions. [2022-03-03 19:27:50,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-03-03 19:27:50,513 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:27:50,513 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:27:50,529 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-03-03 19:27:50,717 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 [2022-03-03 19:27:50,717 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:27:50,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:27:50,718 INFO L85 PathProgramCache]: Analyzing trace with hash -304073589, now seen corresponding path program 34 times [2022-03-03 19:27:50,718 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:27:50,718 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692604818] [2022-03-03 19:27:50,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:27:50,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:27:50,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:27:50,885 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:27:50,885 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:27:50,885 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692604818] [2022-03-03 19:27:50,885 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692604818] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:27:50,885 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867562427] [2022-03-03 19:27:50,885 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:27:50,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:27:50,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:27:50,886 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) [2022-03-03 19:27:50,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-03 19:27:50,916 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:27:50,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:27:50,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-03 19:27:50,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:27:51,122 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:27:51,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:27:51,327 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:27:51,327 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867562427] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:27:51,328 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:27:51,328 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 15 [2022-03-03 19:27:51,328 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191843434] [2022-03-03 19:27:51,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:27:51,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 19:27:51,328 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:27:51,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 19:27:51,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2022-03-03 19:27:51,329 INFO L87 Difference]: Start difference. First operand 246 states and 506 transitions. Second operand has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 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) [2022-03-03 19:27:51,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:27:51,667 INFO L93 Difference]: Finished difference Result 752 states and 1479 transitions. [2022-03-03 19:27:51,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 19:27:51,667 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 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 62 [2022-03-03 19:27:51,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:27:51,668 INFO L225 Difference]: With dead ends: 752 [2022-03-03 19:27:51,668 INFO L226 Difference]: Without dead ends: 665 [2022-03-03 19:27:51,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 133 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2022-03-03 19:27:51,669 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 110 mSDsluCounter, 1616 mSDsCounter, 0 mSdLazyCounter, 1029 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 1230 SdHoareTripleChecker+Invalid, 1030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:27:51,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 1230 Invalid, 1030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1029 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:27:51,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2022-03-03 19:27:51,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 505. [2022-03-03 19:27:51,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 2.1488095238095237) internal successors, (1083), 504 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:27:51,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1083 transitions. [2022-03-03 19:27:51,674 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1083 transitions. Word has length 62 [2022-03-03 19:27:51,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:27:51,675 INFO L470 AbstractCegarLoop]: Abstraction has 505 states and 1083 transitions. [2022-03-03 19:27:51,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 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) [2022-03-03 19:27:51,675 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1083 transitions. [2022-03-03 19:27:51,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-03 19:27:51,675 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:27:51,675 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:27:51,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-03 19:27:51,876 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 [2022-03-03 19:27:51,876 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:27:51,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:27:51,877 INFO L85 PathProgramCache]: Analyzing trace with hash -34646647, now seen corresponding path program 35 times [2022-03-03 19:27:51,877 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:27:51,877 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415690875] [2022-03-03 19:27:51,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:27:51,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:27:51,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:27:52,250 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:27:52,250 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:27:52,250 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415690875] [2022-03-03 19:27:52,250 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415690875] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:27:52,250 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475163990] [2022-03-03 19:27:52,250 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:27:52,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:27:52,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:27:52,251 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) [2022-03-03 19:27:52,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-03 19:27:52,284 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-03-03 19:27:52,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:27:52,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-03 19:27:52,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:27:53,060 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:27:53,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:27:53,484 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 169 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:27:53,484 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475163990] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:27:53,485 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:27:53,485 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 70 [2022-03-03 19:27:53,485 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883029872] [2022-03-03 19:27:53,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:27:53,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-03-03 19:27:53,486 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:27:53,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-03-03 19:27:53,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=908, Invalid=4062, Unknown=0, NotChecked=0, Total=4970 [2022-03-03 19:27:53,487 INFO L87 Difference]: Start difference. First operand 505 states and 1083 transitions. Second operand has 71 states, 71 states have (on average 2.1267605633802815) internal successors, (151), 70 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:28:03,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:28:03,257 INFO L93 Difference]: Finished difference Result 4537 states and 8696 transitions. [2022-03-03 19:28:03,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 318 states. [2022-03-03 19:28:03,258 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.1267605633802815) internal successors, (151), 70 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-03-03 19:28:03,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:28:03,263 INFO L225 Difference]: With dead ends: 4537 [2022-03-03 19:28:03,263 INFO L226 Difference]: Without dead ends: 3364 [2022-03-03 19:28:03,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 383 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61155 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=35852, Invalid=111988, Unknown=0, NotChecked=0, Total=147840 [2022-03-03 19:28:03,270 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 945 mSDsluCounter, 1083 mSDsCounter, 0 mSdLazyCounter, 3111 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 945 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 3315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 3111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:28:03,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [945 Valid, 465 Invalid, 3315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 3111 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-03 19:28:03,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3364 states. [2022-03-03 19:28:03,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3364 to 312. [2022-03-03 19:28:03,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.054662379421222) internal successors, (639), 311 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:28:03,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 639 transitions. [2022-03-03 19:28:03,287 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 639 transitions. Word has length 64 [2022-03-03 19:28:03,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:28:03,287 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 639 transitions. [2022-03-03 19:28:03,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.1267605633802815) internal successors, (151), 70 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:28:03,287 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 639 transitions. [2022-03-03 19:28:03,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-03 19:28:03,288 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:28:03,288 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:28:03,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-03 19:28:03,499 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 [2022-03-03 19:28:03,499 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:28:03,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:28:03,500 INFO L85 PathProgramCache]: Analyzing trace with hash -2080416025, now seen corresponding path program 36 times [2022-03-03 19:28:03,500 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:28:03,500 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92060649] [2022-03-03 19:28:03,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:28:03,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:28:03,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:28:03,704 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 157 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:28:03,705 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:28:03,705 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92060649] [2022-03-03 19:28:03,705 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92060649] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:28:03,705 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732302538] [2022-03-03 19:28:03,705 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:28:03,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:28:03,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:28:03,706 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) [2022-03-03 19:28:03,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-03 19:28:03,739 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-03-03 19:28:03,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:28:03,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-03 19:28:03,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:28:04,311 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 157 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:28:04,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:28:04,718 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 169 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:28:04,718 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732302538] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:28:04,718 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:28:04,718 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 29, 29] total 69 [2022-03-03 19:28:04,718 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700274472] [2022-03-03 19:28:04,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:28:04,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-03-03 19:28:04,719 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:28:04,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-03-03 19:28:04,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1175, Invalid=3655, Unknown=0, NotChecked=0, Total=4830 [2022-03-03 19:28:04,720 INFO L87 Difference]: Start difference. First operand 312 states and 639 transitions. Second operand has 70 states, 70 states have (on average 2.4285714285714284) internal successors, (170), 69 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:28:09,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:28:09,987 INFO L93 Difference]: Finished difference Result 2349 states and 4673 transitions. [2022-03-03 19:28:09,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 227 states. [2022-03-03 19:28:09,988 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.4285714285714284) internal successors, (170), 69 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-03-03 19:28:09,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:28:09,991 INFO L225 Difference]: With dead ends: 2349 [2022-03-03 19:28:09,991 INFO L226 Difference]: Without dead ends: 2345 [2022-03-03 19:28:09,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 291 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33623 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=22314, Invalid=63242, Unknown=0, NotChecked=0, Total=85556 [2022-03-03 19:28:09,996 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 943 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 1528 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 943 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 1722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 1528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:28:09,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [943 Valid, 153 Invalid, 1722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 1528 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 19:28:09,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2345 states. [2022-03-03 19:28:10,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2345 to 264. [2022-03-03 19:28:10,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.068441064638783) internal successors, (544), 263 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:28:10,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 544 transitions. [2022-03-03 19:28:10,005 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 544 transitions. Word has length 64 [2022-03-03 19:28:10,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:28:10,006 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 544 transitions. [2022-03-03 19:28:10,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.4285714285714284) internal successors, (170), 69 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:28:10,006 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 544 transitions. [2022-03-03 19:28:10,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-03 19:28:10,006 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:28:10,006 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:28:10,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-03 19:28:10,223 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 [2022-03-03 19:28:10,223 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:28:10,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:28:10,223 INFO L85 PathProgramCache]: Analyzing trace with hash 141085255, now seen corresponding path program 37 times [2022-03-03 19:28:10,223 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:28:10,224 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036268530] [2022-03-03 19:28:10,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:28:10,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:28:10,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:28:10,398 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:28:10,398 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:28:10,398 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036268530] [2022-03-03 19:28:10,398 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036268530] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:28:10,398 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705439095] [2022-03-03 19:28:10,399 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:28:10,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:28:10,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:28:10,400 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) [2022-03-03 19:28:10,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-03 19:28:10,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:28:10,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-03 19:28:10,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:28:10,545 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:28:10,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:28:10,659 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:28:10,659 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705439095] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:28:10,659 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:28:10,660 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 16 [2022-03-03 19:28:10,660 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000733509] [2022-03-03 19:28:10,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:28:10,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 19:28:10,660 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:28:10,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 19:28:10,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:28:10,660 INFO L87 Difference]: Start difference. First operand 264 states and 544 transitions. Second operand has 16 states, 16 states have (on average 4.125) internal successors, (66), 16 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) [2022-03-03 19:28:10,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:28:10,893 INFO L93 Difference]: Finished difference Result 811 states and 1596 transitions. [2022-03-03 19:28:10,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 19:28:10,893 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.125) internal successors, (66), 16 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 66 [2022-03-03 19:28:10,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:28:10,908 INFO L225 Difference]: With dead ends: 811 [2022-03-03 19:28:10,908 INFO L226 Difference]: Without dead ends: 718 [2022-03-03 19:28:10,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 142 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:28:10,908 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 119 mSDsluCounter, 1880 mSDsCounter, 0 mSdLazyCounter, 1192 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 1422 SdHoareTripleChecker+Invalid, 1193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:28:10,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 1422 Invalid, 1193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:28:10,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2022-03-03 19:28:10,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 545. [2022-03-03 19:28:10,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 544 states have (on average 2.150735294117647) internal successors, (1170), 544 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:28:10,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 1170 transitions. [2022-03-03 19:28:10,915 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 1170 transitions. Word has length 66 [2022-03-03 19:28:10,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:28:10,915 INFO L470 AbstractCegarLoop]: Abstraction has 545 states and 1170 transitions. [2022-03-03 19:28:10,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.125) internal successors, (66), 16 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) [2022-03-03 19:28:10,915 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 1170 transitions. [2022-03-03 19:28:10,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-03 19:28:10,916 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:28:10,916 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:28:10,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-03 19:28:11,131 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 [2022-03-03 19:28:11,132 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:28:11,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:28:11,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1239628869, now seen corresponding path program 38 times [2022-03-03 19:28:11,132 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:28:11,132 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958454183] [2022-03-03 19:28:11,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:28:11,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:28:11,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:28:11,496 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:28:11,497 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:28:11,497 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958454183] [2022-03-03 19:28:11,497 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958454183] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:28:11,497 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082605877] [2022-03-03 19:28:11,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:28:11,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:28:11,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:28:11,500 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) [2022-03-03 19:28:11,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-03 19:28:11,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:28:11,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:28:11,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-03 19:28:11,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:28:12,052 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:28:12,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:28:12,358 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 196 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:28:12,359 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082605877] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:28:12,359 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:28:12,359 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 75 [2022-03-03 19:28:12,359 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106399408] [2022-03-03 19:28:12,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:28:12,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-03-03 19:28:12,359 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:28:12,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-03-03 19:28:12,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1033, Invalid=4667, Unknown=0, NotChecked=0, Total=5700 [2022-03-03 19:28:12,361 INFO L87 Difference]: Start difference. First operand 545 states and 1170 transitions. Second operand has 76 states, 76 states have (on average 2.1184210526315788) internal successors, (161), 75 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:28:22,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:28:22,866 INFO L93 Difference]: Finished difference Result 5173 states and 9912 transitions. [2022-03-03 19:28:22,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 363 states. [2022-03-03 19:28:22,866 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.1184210526315788) internal successors, (161), 75 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-03-03 19:28:22,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:28:22,872 INFO L225 Difference]: With dead ends: 5173 [2022-03-03 19:28:22,872 INFO L226 Difference]: Without dead ends: 3820 [2022-03-03 19:28:22,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 433 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80122 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=45818, Invalid=142972, Unknown=0, NotChecked=0, Total=188790 [2022-03-03 19:28:22,881 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1177 mSDsluCounter, 1148 mSDsCounter, 0 mSdLazyCounter, 3172 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1177 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 3431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 3172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:28:22,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1177 Valid, 530 Invalid, 3431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 3172 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-03 19:28:22,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3820 states. [2022-03-03 19:28:22,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3820 to 334. [2022-03-03 19:28:22,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.057057057057057) internal successors, (685), 333 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:28:22,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 685 transitions. [2022-03-03 19:28:22,898 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 685 transitions. Word has length 68 [2022-03-03 19:28:22,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:28:22,899 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 685 transitions. [2022-03-03 19:28:22,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.1184210526315788) internal successors, (161), 75 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:28:22,899 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 685 transitions. [2022-03-03 19:28:22,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-03 19:28:22,899 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:28:22,899 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:28:22,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-03 19:28:23,113 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 [2022-03-03 19:28:23,113 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:28:23,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:28:23,113 INFO L85 PathProgramCache]: Analyzing trace with hash -859999513, now seen corresponding path program 39 times [2022-03-03 19:28:23,113 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:28:23,113 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537078889] [2022-03-03 19:28:23,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:28:23,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:28:23,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:28:23,336 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 183 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:28:23,337 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:28:23,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537078889] [2022-03-03 19:28:23,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537078889] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:28:23,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038897045] [2022-03-03 19:28:23,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:28:23,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:28:23,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:28:23,348 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) [2022-03-03 19:28:23,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-03 19:28:23,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2022-03-03 19:28:23,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:28:23,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-03 19:28:23,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:28:24,234 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 183 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:28:24,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:28:24,727 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 196 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:28:24,727 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038897045] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:28:24,727 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:28:24,728 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 31, 31] total 74 [2022-03-03 19:28:24,728 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612811000] [2022-03-03 19:28:24,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:28:24,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-03-03 19:28:24,728 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:28:24,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-03-03 19:28:24,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1342, Invalid=4208, Unknown=0, NotChecked=0, Total=5550 [2022-03-03 19:28:24,729 INFO L87 Difference]: Start difference. First operand 334 states and 685 transitions. Second operand has 75 states, 75 states have (on average 2.4266666666666667) internal successors, (182), 74 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:28:31,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:28:31,209 INFO L93 Difference]: Finished difference Result 2681 states and 5337 transitions. [2022-03-03 19:28:31,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 258 states. [2022-03-03 19:28:31,209 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.4266666666666667) internal successors, (182), 74 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-03-03 19:28:31,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:28:31,212 INFO L225 Difference]: With dead ends: 2681 [2022-03-03 19:28:31,212 INFO L226 Difference]: Without dead ends: 2677 [2022-03-03 19:28:31,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 327 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43465 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=28061, Invalid=79851, Unknown=0, NotChecked=0, Total=107912 [2022-03-03 19:28:31,217 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 864 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 1831 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 864 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 2097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 1831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:28:31,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [864 Valid, 194 Invalid, 2097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 1831 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-03 19:28:31,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2022-03-03 19:28:31,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 282. [2022-03-03 19:28:31,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.0711743772241995) internal successors, (582), 281 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:28:31,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 582 transitions. [2022-03-03 19:28:31,231 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 582 transitions. Word has length 68 [2022-03-03 19:28:31,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:28:31,231 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 582 transitions. [2022-03-03 19:28:31,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.4266666666666667) internal successors, (182), 74 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:28:31,231 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 582 transitions. [2022-03-03 19:28:31,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-03-03 19:28:31,231 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:28:31,232 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:28:31,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-03 19:28:31,445 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 [2022-03-03 19:28:31,445 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:28:31,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:28:31,445 INFO L85 PathProgramCache]: Analyzing trace with hash 654176771, now seen corresponding path program 40 times [2022-03-03 19:28:31,445 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:28:31,446 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196955564] [2022-03-03 19:28:31,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:28:31,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:28:31,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:28:31,671 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:28:31,671 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:28:31,671 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196955564] [2022-03-03 19:28:31,671 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196955564] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:28:31,671 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250173837] [2022-03-03 19:28:31,671 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:28:31,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:28:31,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:28:31,672 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) [2022-03-03 19:28:31,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-03 19:28:31,704 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:28:31,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:28:31,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-03 19:28:31,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:28:31,852 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:28:31,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:28:31,974 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:28:31,975 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250173837] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:28:31,975 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:28:31,975 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 17 [2022-03-03 19:28:31,975 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196215203] [2022-03-03 19:28:31,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:28:31,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 19:28:31,976 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:28:31,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 19:28:31,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2022-03-03 19:28:31,976 INFO L87 Difference]: Start difference. First operand 282 states and 582 transitions. Second operand has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 17 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:28:32,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:28:32,245 INFO L93 Difference]: Finished difference Result 870 states and 1713 transitions. [2022-03-03 19:28:32,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 19:28:32,246 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 17 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2022-03-03 19:28:32,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:28:32,272 INFO L225 Difference]: With dead ends: 870 [2022-03-03 19:28:32,272 INFO L226 Difference]: Without dead ends: 771 [2022-03-03 19:28:32,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 151 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2022-03-03 19:28:32,281 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 128 mSDsluCounter, 2164 mSDsCounter, 0 mSdLazyCounter, 1367 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 1628 SdHoareTripleChecker+Invalid, 1368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:28:32,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 1628 Invalid, 1368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1367 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:28:32,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2022-03-03 19:28:32,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 585. [2022-03-03 19:28:32,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 584 states have (on average 2.1523972602739727) internal successors, (1257), 584 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:28:32,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1257 transitions. [2022-03-03 19:28:32,288 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1257 transitions. Word has length 70 [2022-03-03 19:28:32,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:28:32,288 INFO L470 AbstractCegarLoop]: Abstraction has 585 states and 1257 transitions. [2022-03-03 19:28:32,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 17 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:28:32,288 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1257 transitions. [2022-03-03 19:28:32,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-03-03 19:28:32,289 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:28:32,289 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:28:32,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-03 19:28:32,505 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 [2022-03-03 19:28:32,506 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:28:32,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:28:32,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1641231617, now seen corresponding path program 41 times [2022-03-03 19:28:32,506 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:28:32,506 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158549638] [2022-03-03 19:28:32,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:28:32,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:28:32,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:28:33,056 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 196 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:28:33,057 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:28:33,057 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158549638] [2022-03-03 19:28:33,057 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158549638] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:28:33,057 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964792597] [2022-03-03 19:28:33,057 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:28:33,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:28:33,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:28:33,058 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) [2022-03-03 19:28:33,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-03 19:28:33,094 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2022-03-03 19:28:33,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:28:33,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-03 19:28:33,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:28:33,789 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 196 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:28:33,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:28:34,156 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 225 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:28:34,156 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964792597] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:28:34,156 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:28:34,157 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 80 [2022-03-03 19:28:34,157 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341133042] [2022-03-03 19:28:34,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:28:34,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-03-03 19:28:34,157 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:28:34,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-03-03 19:28:34,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1166, Invalid=5314, Unknown=0, NotChecked=0, Total=6480 [2022-03-03 19:28:34,158 INFO L87 Difference]: Start difference. First operand 585 states and 1257 transitions. Second operand has 81 states, 81 states have (on average 2.111111111111111) internal successors, (171), 80 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:28:48,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:28:48,120 INFO L93 Difference]: Finished difference Result 5849 states and 11204 transitions. [2022-03-03 19:28:48,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 411 states. [2022-03-03 19:28:48,123 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.111111111111111) internal successors, (171), 80 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2022-03-03 19:28:48,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:28:48,128 INFO L225 Difference]: With dead ends: 5849 [2022-03-03 19:28:48,129 INFO L226 Difference]: Without dead ends: 4304 [2022-03-03 19:28:48,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 583 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 486 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103245 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=57734, Invalid=179922, Unknown=0, NotChecked=0, Total=237656 [2022-03-03 19:28:48,140 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1314 mSDsluCounter, 1321 mSDsCounter, 0 mSdLazyCounter, 3750 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1314 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 4043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 3750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:28:48,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1314 Valid, 578 Invalid, 4043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 3750 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-03 19:28:48,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4304 states. [2022-03-03 19:28:48,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4304 to 356. [2022-03-03 19:28:48,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 2.0591549295774647) internal successors, (731), 355 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:28:48,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 731 transitions. [2022-03-03 19:28:48,160 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 731 transitions. Word has length 72 [2022-03-03 19:28:48,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:28:48,160 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 731 transitions. [2022-03-03 19:28:48,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.111111111111111) internal successors, (171), 80 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:28:48,160 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 731 transitions. [2022-03-03 19:28:48,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-03-03 19:28:48,161 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:28:48,161 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:28:48,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-03 19:28:48,377 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 [2022-03-03 19:28:48,378 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:28:48,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:28:48,378 INFO L85 PathProgramCache]: Analyzing trace with hash -677292057, now seen corresponding path program 42 times [2022-03-03 19:28:48,378 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:28:48,378 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765824803] [2022-03-03 19:28:48,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:28:48,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:28:48,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:28:48,611 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 211 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:28:48,612 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:28:48,612 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765824803] [2022-03-03 19:28:48,612 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765824803] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:28:48,612 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830831504] [2022-03-03 19:28:48,612 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:28:48,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:28:48,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:28:48,613 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) [2022-03-03 19:28:48,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-03 19:28:48,646 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2022-03-03 19:28:48,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:28:48,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-03 19:28:48,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:28:49,343 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 211 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:28:49,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:28:50,173 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 225 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:28:50,173 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830831504] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:28:50,173 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:28:50,173 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 33, 33] total 79 [2022-03-03 19:28:50,173 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782041110] [2022-03-03 19:28:50,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:28:50,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-03-03 19:28:50,174 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:28:50,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-03-03 19:28:50,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1520, Invalid=4800, Unknown=0, NotChecked=0, Total=6320 [2022-03-03 19:28:50,175 INFO L87 Difference]: Start difference. First operand 356 states and 731 transitions. Second operand has 80 states, 80 states have (on average 2.425) internal successors, (194), 79 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:28:57,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:28:57,215 INFO L93 Difference]: Finished difference Result 3035 states and 6045 transitions. [2022-03-03 19:28:57,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 291 states. [2022-03-03 19:28:57,216 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.425) internal successors, (194), 79 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2022-03-03 19:28:57,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:28:57,219 INFO L225 Difference]: With dead ends: 3035 [2022-03-03 19:28:57,219 INFO L226 Difference]: Without dead ends: 3031 [2022-03-03 19:28:57,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 365 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55340 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=34839, Invalid=99483, Unknown=0, NotChecked=0, Total=134322 [2022-03-03 19:28:57,228 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 697 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 2303 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 697 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 2487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 2303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 19:28:57,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [697 Valid, 215 Invalid, 2487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 2303 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-03 19:28:57,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3031 states. [2022-03-03 19:28:57,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3031 to 300. [2022-03-03 19:28:57,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.0735785953177257) internal successors, (620), 299 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:28:57,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 620 transitions. [2022-03-03 19:28:57,241 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 620 transitions. Word has length 72 [2022-03-03 19:28:57,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:28:57,241 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 620 transitions. [2022-03-03 19:28:57,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.425) internal successors, (194), 79 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:28:57,242 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 620 transitions. [2022-03-03 19:28:57,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-03 19:28:57,242 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:28:57,242 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:28:57,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-03 19:28:57,455 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 [2022-03-03 19:28:57,455 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:28:57,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:28:57,455 INFO L85 PathProgramCache]: Analyzing trace with hash 47360959, now seen corresponding path program 43 times [2022-03-03 19:28:57,455 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:28:57,455 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457259210] [2022-03-03 19:28:57,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:28:57,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:28:57,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:28:57,737 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:28:57,738 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:28:57,738 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457259210] [2022-03-03 19:28:57,738 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457259210] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:28:57,738 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645348507] [2022-03-03 19:28:57,738 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:28:57,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:28:57,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:28:57,739 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) [2022-03-03 19:28:57,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-03 19:28:57,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:28:57,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-03 19:28:57,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:28:57,959 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:28:57,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:28:58,136 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:28:58,136 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645348507] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:28:58,136 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:28:58,136 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 18 [2022-03-03 19:28:58,136 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58662739] [2022-03-03 19:28:58,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:28:58,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-03 19:28:58,137 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:28:58,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-03 19:28:58,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2022-03-03 19:28:58,138 INFO L87 Difference]: Start difference. First operand 300 states and 620 transitions. Second operand has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 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) [2022-03-03 19:28:58,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:28:58,586 INFO L93 Difference]: Finished difference Result 929 states and 1830 transitions. [2022-03-03 19:28:58,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-03 19:28:58,586 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 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 74 [2022-03-03 19:28:58,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:28:58,587 INFO L225 Difference]: With dead ends: 929 [2022-03-03 19:28:58,587 INFO L226 Difference]: Without dead ends: 824 [2022-03-03 19:28:58,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 160 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2022-03-03 19:28:58,588 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 137 mSDsluCounter, 2468 mSDsCounter, 0 mSdLazyCounter, 1554 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 1848 SdHoareTripleChecker+Invalid, 1555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:28:58,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 1848 Invalid, 1555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1554 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:28:58,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2022-03-03 19:28:58,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 625. [2022-03-03 19:28:58,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 624 states have (on average 2.1538461538461537) internal successors, (1344), 624 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:28:58,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1344 transitions. [2022-03-03 19:28:58,598 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1344 transitions. Word has length 74 [2022-03-03 19:28:58,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:28:58,598 INFO L470 AbstractCegarLoop]: Abstraction has 625 states and 1344 transitions. [2022-03-03 19:28:58,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 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) [2022-03-03 19:28:58,599 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1344 transitions. [2022-03-03 19:28:58,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-03-03 19:28:58,599 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:28:58,599 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:28:58,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-03 19:28:58,812 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 [2022-03-03 19:28:58,813 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:28:58,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:28:58,813 INFO L85 PathProgramCache]: Analyzing trace with hash 2066890685, now seen corresponding path program 44 times [2022-03-03 19:28:58,813 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:28:58,813 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486556195] [2022-03-03 19:28:58,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:28:58,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:28:58,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:28:59,178 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 225 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:28:59,179 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:28:59,179 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486556195] [2022-03-03 19:28:59,179 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486556195] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:28:59,179 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349923156] [2022-03-03 19:28:59,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:28:59,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:28:59,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:28:59,180 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) [2022-03-03 19:28:59,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-03 19:28:59,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:28:59,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:28:59,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:28:59,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:28:59,863 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 225 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:28:59,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:29:00,226 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 256 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:29:00,227 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349923156] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:29:00,227 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:29:00,227 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 85 [2022-03-03 19:29:00,227 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875422619] [2022-03-03 19:29:00,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:29:00,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-03-03 19:29:00,227 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:29:00,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-03-03 19:29:00,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1307, Invalid=6003, Unknown=0, NotChecked=0, Total=7310 [2022-03-03 19:29:00,229 INFO L87 Difference]: Start difference. First operand 625 states and 1344 transitions. Second operand has 86 states, 86 states have (on average 2.104651162790698) internal successors, (181), 85 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:29:16,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:29:16,721 INFO L93 Difference]: Finished difference Result 6565 states and 12572 transitions. [2022-03-03 19:29:16,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 462 states. [2022-03-03 19:29:16,721 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.104651162790698) internal successors, (181), 85 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-03-03 19:29:16,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:29:16,727 INFO L225 Difference]: With dead ends: 6565 [2022-03-03 19:29:16,727 INFO L226 Difference]: Without dead ends: 4816 [2022-03-03 19:29:16,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 644 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 542 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131093 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=71840, Invalid=223552, Unknown=0, NotChecked=0, Total=295392 [2022-03-03 19:29:16,741 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1419 mSDsluCounter, 1480 mSDsCounter, 0 mSdLazyCounter, 4278 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1419 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 4576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 4278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:29:16,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1419 Valid, 614 Invalid, 4576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 4278 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-03 19:29:16,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4816 states. [2022-03-03 19:29:16,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4816 to 378. [2022-03-03 19:29:16,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 2.061007957559682) internal successors, (777), 377 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:29:16,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 777 transitions. [2022-03-03 19:29:16,762 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 777 transitions. Word has length 76 [2022-03-03 19:29:16,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:29:16,763 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 777 transitions. [2022-03-03 19:29:16,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.104651162790698) internal successors, (181), 85 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:29:16,763 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 777 transitions. [2022-03-03 19:29:16,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-03-03 19:29:16,763 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:29:16,763 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:29:16,779 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-03-03 19:29:16,979 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 [2022-03-03 19:29:16,979 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:29:16,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:29:16,980 INFO L85 PathProgramCache]: Analyzing trace with hash -156611097, now seen corresponding path program 45 times [2022-03-03 19:29:16,980 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:29:16,980 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551700652] [2022-03-03 19:29:16,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:29:16,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:29:16,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:29:17,200 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 241 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:29:17,200 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:29:17,200 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551700652] [2022-03-03 19:29:17,200 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551700652] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:29:17,200 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671248804] [2022-03-03 19:29:17,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:29:17,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:29:17,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:29:17,202 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) [2022-03-03 19:29:17,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-03 19:29:17,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2022-03-03 19:29:17,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:29:17,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:29:17,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:29:17,872 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 241 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:29:17,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:29:18,447 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 256 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:29:18,447 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671248804] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:29:18,447 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:29:18,447 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 35, 35] total 84 [2022-03-03 19:29:18,447 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445822173] [2022-03-03 19:29:18,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:29:18,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-03-03 19:29:18,448 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:29:18,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-03-03 19:29:18,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1709, Invalid=5431, Unknown=0, NotChecked=0, Total=7140 [2022-03-03 19:29:18,449 INFO L87 Difference]: Start difference. First operand 378 states and 777 transitions. Second operand has 85 states, 85 states have (on average 2.4235294117647057) internal successors, (206), 84 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:29:27,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:29:27,473 INFO L93 Difference]: Finished difference Result 3411 states and 6797 transitions. [2022-03-03 19:29:27,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 326 states. [2022-03-03 19:29:27,474 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.4235294117647057) internal successors, (206), 84 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-03-03 19:29:27,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:29:27,477 INFO L225 Difference]: With dead ends: 3411 [2022-03-03 19:29:27,477 INFO L226 Difference]: Without dead ends: 3407 [2022-03-03 19:29:27,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 405 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69513 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=42763, Invalid=122479, Unknown=0, NotChecked=0, Total=165242 [2022-03-03 19:29:27,487 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 1264 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 2450 mSolverCounterSat, 351 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1264 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 2801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 351 IncrementalHoareTripleChecker+Valid, 2450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 19:29:27,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1264 Valid, 236 Invalid, 2801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [351 Valid, 2450 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-03 19:29:27,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3407 states. [2022-03-03 19:29:27,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3407 to 318. [2022-03-03 19:29:27,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.0757097791798107) internal successors, (658), 317 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:29:27,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 658 transitions. [2022-03-03 19:29:27,523 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 658 transitions. Word has length 76 [2022-03-03 19:29:27,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:29:27,524 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 658 transitions. [2022-03-03 19:29:27,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.4235294117647057) internal successors, (206), 84 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:29:27,524 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 658 transitions. [2022-03-03 19:29:27,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-03-03 19:29:27,528 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:29:27,529 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:29:27,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-03 19:29:27,744 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 [2022-03-03 19:29:27,745 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:29:27,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:29:27,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1083832187, now seen corresponding path program 46 times [2022-03-03 19:29:27,745 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:29:27,745 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351686875] [2022-03-03 19:29:27,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:29:27,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:29:27,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:29:27,970 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:29:27,970 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:29:27,970 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351686875] [2022-03-03 19:29:27,970 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351686875] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:29:27,970 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569422865] [2022-03-03 19:29:27,970 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:29:27,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:29:27,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:29:27,972 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) [2022-03-03 19:29:27,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-03 19:29:28,005 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:29:28,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:29:28,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-03 19:29:28,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:29:28,190 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:29:28,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:29:28,373 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:29:28,374 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569422865] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:29:28,374 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:29:28,374 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 19 [2022-03-03 19:29:28,374 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374432944] [2022-03-03 19:29:28,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:29:28,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 19:29:28,374 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:29:28,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 19:29:28,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2022-03-03 19:29:28,375 INFO L87 Difference]: Start difference. First operand 318 states and 658 transitions. Second operand has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 19 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) [2022-03-03 19:29:28,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:29:28,808 INFO L93 Difference]: Finished difference Result 988 states and 1947 transitions. [2022-03-03 19:29:28,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-03 19:29:28,808 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 19 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 78 [2022-03-03 19:29:28,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:29:28,810 INFO L225 Difference]: With dead ends: 988 [2022-03-03 19:29:28,810 INFO L226 Difference]: Without dead ends: 877 [2022-03-03 19:29:28,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 169 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2022-03-03 19:29:28,810 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 146 mSDsluCounter, 2792 mSDsCounter, 0 mSdLazyCounter, 1753 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 2082 SdHoareTripleChecker+Invalid, 1754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:29:28,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 2082 Invalid, 1754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1753 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:29:28,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2022-03-03 19:29:28,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 665. [2022-03-03 19:29:28,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 664 states have (on average 2.1551204819277108) internal successors, (1431), 664 states have internal predecessors, (1431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:29:28,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 1431 transitions. [2022-03-03 19:29:28,817 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 1431 transitions. Word has length 78 [2022-03-03 19:29:28,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:29:28,817 INFO L470 AbstractCegarLoop]: Abstraction has 665 states and 1431 transitions. [2022-03-03 19:29:28,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 19 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) [2022-03-03 19:29:28,817 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 1431 transitions. [2022-03-03 19:29:28,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-03 19:29:28,818 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:29:28,818 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:29:28,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-03 19:29:29,034 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 [2022-03-03 19:29:29,036 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:29:29,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:29:29,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1762435975, now seen corresponding path program 47 times [2022-03-03 19:29:29,036 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:29:29,036 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330669012] [2022-03-03 19:29:29,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:29:29,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:29:29,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:29:29,408 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 256 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:29:29,408 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:29:29,408 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330669012] [2022-03-03 19:29:29,408 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330669012] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:29:29,408 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035095310] [2022-03-03 19:29:29,408 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:29:29,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:29:29,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:29:29,410 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) [2022-03-03 19:29:29,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-03 19:29:29,460 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2022-03-03 19:29:29,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:29:29,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 19:29:29,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:29:30,396 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 256 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:29:30,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:29:30,805 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 289 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:29:30,806 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035095310] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:29:30,806 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:29:30,806 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 90 [2022-03-03 19:29:30,806 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063254363] [2022-03-03 19:29:30,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:29:30,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-03-03 19:29:30,806 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:29:30,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-03-03 19:29:30,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1456, Invalid=6734, Unknown=0, NotChecked=0, Total=8190 [2022-03-03 19:29:30,808 INFO L87 Difference]: Start difference. First operand 665 states and 1431 transitions. Second operand has 91 states, 91 states have (on average 2.098901098901099) internal successors, (191), 90 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:29:50,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:29:50,809 INFO L93 Difference]: Finished difference Result 7321 states and 14016 transitions. [2022-03-03 19:29:50,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 516 states. [2022-03-03 19:29:50,809 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.098901098901099) internal successors, (191), 90 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-03-03 19:29:50,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:29:50,815 INFO L225 Difference]: With dead ends: 7321 [2022-03-03 19:29:50,816 INFO L226 Difference]: Without dead ends: 5356 [2022-03-03 19:29:50,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 708 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 601 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164281 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=88390, Invalid=274616, Unknown=0, NotChecked=0, Total=363006 [2022-03-03 19:29:50,833 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1387 mSDsluCounter, 1533 mSDsCounter, 0 mSdLazyCounter, 4254 mSolverCounterSat, 303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1387 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 4557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 303 IncrementalHoareTripleChecker+Valid, 4254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:29:50,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1387 Valid, 642 Invalid, 4557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [303 Valid, 4254 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-03 19:29:50,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5356 states. [2022-03-03 19:29:50,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5356 to 400. [2022-03-03 19:29:50,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 2.06265664160401) internal successors, (823), 399 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:29:50,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 823 transitions. [2022-03-03 19:29:50,856 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 823 transitions. Word has length 80 [2022-03-03 19:29:50,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:29:50,856 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 823 transitions. [2022-03-03 19:29:50,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.098901098901099) internal successors, (191), 90 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:29:50,856 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 823 transitions. [2022-03-03 19:29:50,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-03 19:29:50,857 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:29:50,857 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:29:50,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-03 19:29:51,071 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 [2022-03-03 19:29:51,072 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:29:51,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:29:51,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1430754535, now seen corresponding path program 48 times [2022-03-03 19:29:51,072 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:29:51,072 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253729582] [2022-03-03 19:29:51,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:29:51,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:29:51,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:29:51,396 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 273 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:29:51,396 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:29:51,396 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253729582] [2022-03-03 19:29:51,396 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253729582] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:29:51,397 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694769641] [2022-03-03 19:29:51,397 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:29:51,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:29:51,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:29:51,398 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) [2022-03-03 19:29:51,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-03 19:29:51,448 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2022-03-03 19:29:51,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:29:51,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 19:29:51,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:29:52,270 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 273 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:29:52,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:29:53,087 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 289 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:29:53,088 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694769641] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:29:53,088 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:29:53,088 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 37, 37] total 89 [2022-03-03 19:29:53,088 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524885159] [2022-03-03 19:29:53,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:29:53,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-03-03 19:29:53,088 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:29:53,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-03-03 19:29:53,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1909, Invalid=6101, Unknown=0, NotChecked=0, Total=8010 [2022-03-03 19:29:53,090 INFO L87 Difference]: Start difference. First operand 400 states and 823 transitions. Second operand has 90 states, 90 states have (on average 2.422222222222222) internal successors, (218), 89 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:04,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:30:04,014 INFO L93 Difference]: Finished difference Result 3809 states and 7593 transitions. [2022-03-03 19:30:04,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 363 states. [2022-03-03 19:30:04,014 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.422222222222222) internal successors, (218), 89 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-03-03 19:30:04,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:30:04,019 INFO L225 Difference]: With dead ends: 3809 [2022-03-03 19:30:04,019 INFO L226 Difference]: Without dead ends: 3805 [2022-03-03 19:30:04,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 554 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 447 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86266 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=51954, Invalid=149198, Unknown=0, NotChecked=0, Total=201152 [2022-03-03 19:30:04,030 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 1202 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 2758 mSolverCounterSat, 413 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1202 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 3171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 413 IncrementalHoareTripleChecker+Valid, 2758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:30:04,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1202 Valid, 251 Invalid, 3171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [413 Valid, 2758 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-03 19:30:04,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3805 states. [2022-03-03 19:30:04,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3805 to 336. [2022-03-03 19:30:04,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.0776119402985076) internal successors, (696), 335 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:04,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 696 transitions. [2022-03-03 19:30:04,044 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 696 transitions. Word has length 80 [2022-03-03 19:30:04,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:30:04,044 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 696 transitions. [2022-03-03 19:30:04,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.422222222222222) internal successors, (218), 89 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:04,045 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 696 transitions. [2022-03-03 19:30:04,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-03-03 19:30:04,045 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:30:04,045 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:30:04,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-03 19:30:04,248 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 [2022-03-03 19:30:04,248 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:30:04,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:30:04,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1887884599, now seen corresponding path program 49 times [2022-03-03 19:30:04,248 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:30:04,248 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140554610] [2022-03-03 19:30:04,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:30:04,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:30:04,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:30:04,529 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:04,530 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:30:04,530 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140554610] [2022-03-03 19:30:04,530 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140554610] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:30:04,530 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49578695] [2022-03-03 19:30:04,530 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:30:04,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:30:04,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:30:04,532 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) [2022-03-03 19:30:04,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-03 19:30:04,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:30:04,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-03 19:30:04,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:30:04,781 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:04,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:30:04,986 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:04,986 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49578695] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:30:04,986 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:30:04,986 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 20 [2022-03-03 19:30:04,987 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707842611] [2022-03-03 19:30:04,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:30:04,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:30:04,987 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:30:04,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:30:04,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:30:04,988 INFO L87 Difference]: Start difference. First operand 336 states and 696 transitions. Second operand has 20 states, 20 states have (on average 4.1) internal successors, (82), 20 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) [2022-03-03 19:30:05,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:30:05,401 INFO L93 Difference]: Finished difference Result 1047 states and 2064 transitions. [2022-03-03 19:30:05,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-03 19:30:05,401 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.1) internal successors, (82), 20 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 82 [2022-03-03 19:30:05,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:30:05,402 INFO L225 Difference]: With dead ends: 1047 [2022-03-03 19:30:05,402 INFO L226 Difference]: Without dead ends: 930 [2022-03-03 19:30:05,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 178 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:30:05,403 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 155 mSDsluCounter, 3136 mSDsCounter, 0 mSdLazyCounter, 1964 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 2330 SdHoareTripleChecker+Invalid, 1965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:30:05,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 2330 Invalid, 1965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1964 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:30:05,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2022-03-03 19:30:05,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 705. [2022-03-03 19:30:05,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 2.15625) internal successors, (1518), 704 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:05,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 1518 transitions. [2022-03-03 19:30:05,410 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 1518 transitions. Word has length 82 [2022-03-03 19:30:05,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:30:05,410 INFO L470 AbstractCegarLoop]: Abstraction has 705 states and 1518 transitions. [2022-03-03 19:30:05,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.1) internal successors, (82), 20 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) [2022-03-03 19:30:05,411 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 1518 transitions. [2022-03-03 19:30:05,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-03-03 19:30:05,411 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:30:05,411 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:30:05,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-03-03 19:30:05,612 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 [2022-03-03 19:30:05,612 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:30:05,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:30:05,612 INFO L85 PathProgramCache]: Analyzing trace with hash -2121692363, now seen corresponding path program 50 times [2022-03-03 19:30:05,612 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:30:05,613 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068489046] [2022-03-03 19:30:05,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:30:05,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:30:05,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:30:06,101 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 289 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:06,101 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:30:06,101 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068489046] [2022-03-03 19:30:06,101 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068489046] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:30:06,101 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863161738] [2022-03-03 19:30:06,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:30:06,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:30:06,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:30:06,103 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) [2022-03-03 19:30:06,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-03 19:30:06,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:30:06,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:30:06,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-03 19:30:06,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:30:06,967 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 289 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:06,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:30:07,431 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 324 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:07,431 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863161738] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:30:07,431 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:30:07,431 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 95 [2022-03-03 19:30:07,431 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987054474] [2022-03-03 19:30:07,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:30:07,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-03-03 19:30:07,432 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:30:07,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-03-03 19:30:07,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1613, Invalid=7507, Unknown=0, NotChecked=0, Total=9120 [2022-03-03 19:30:07,433 INFO L87 Difference]: Start difference. First operand 705 states and 1518 transitions. Second operand has 96 states, 96 states have (on average 2.09375) internal successors, (201), 95 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:32,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:30:32,601 INFO L93 Difference]: Finished difference Result 8117 states and 15536 transitions. [2022-03-03 19:30:32,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 573 states. [2022-03-03 19:30:32,601 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.09375) internal successors, (201), 95 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2022-03-03 19:30:32,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:30:32,608 INFO L225 Difference]: With dead ends: 8117 [2022-03-03 19:30:32,608 INFO L226 Difference]: Without dead ends: 5924 [2022-03-03 19:30:32,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 775 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 663 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203453 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=107652, Invalid=333908, Unknown=0, NotChecked=0, Total=441560 [2022-03-03 19:30:32,627 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1542 mSDsluCounter, 1593 mSDsCounter, 0 mSdLazyCounter, 4473 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1542 SdHoareTripleChecker+Valid, 695 SdHoareTripleChecker+Invalid, 4791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 4473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:30:32,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1542 Valid, 695 Invalid, 4791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 4473 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-03 19:30:32,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5924 states. [2022-03-03 19:30:32,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5924 to 422. [2022-03-03 19:30:32,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 2.0641330166270784) internal successors, (869), 421 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:32,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 869 transitions. [2022-03-03 19:30:32,649 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 869 transitions. Word has length 84 [2022-03-03 19:30:32,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:30:32,650 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 869 transitions. [2022-03-03 19:30:32,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.09375) internal successors, (201), 95 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:32,650 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 869 transitions. [2022-03-03 19:30:32,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-03-03 19:30:32,650 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:30:32,650 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:30:32,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-03 19:30:32,867 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 [2022-03-03 19:30:32,867 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:30:32,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:30:32,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1012428007, now seen corresponding path program 51 times [2022-03-03 19:30:32,868 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:30:32,868 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547382034] [2022-03-03 19:30:32,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:30:32,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:30:32,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:30:33,174 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 307 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:33,174 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:30:33,174 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547382034] [2022-03-03 19:30:33,174 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547382034] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:30:33,175 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392712397] [2022-03-03 19:30:33,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:30:33,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:30:33,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:30:33,176 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) [2022-03-03 19:30:33,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-03 19:30:33,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2022-03-03 19:30:33,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:30:33,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-03 19:30:33,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:30:34,291 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 307 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:34,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:30:34,989 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 324 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:34,990 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392712397] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:30:34,990 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:30:34,990 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 39, 39] total 94 [2022-03-03 19:30:34,990 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054173891] [2022-03-03 19:30:34,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:30:34,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-03-03 19:30:34,990 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:30:34,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-03-03 19:30:34,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2120, Invalid=6810, Unknown=0, NotChecked=0, Total=8930 [2022-03-03 19:30:34,992 INFO L87 Difference]: Start difference. First operand 422 states and 869 transitions. Second operand has 95 states, 95 states have (on average 2.4210526315789473) internal successors, (230), 94 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:47,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:30:47,715 INFO L93 Difference]: Finished difference Result 4229 states and 8433 transitions. [2022-03-03 19:30:47,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 402 states. [2022-03-03 19:30:47,715 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.4210526315789473) internal successors, (230), 94 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2022-03-03 19:30:47,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:30:47,719 INFO L225 Difference]: With dead ends: 4229 [2022-03-03 19:30:47,720 INFO L226 Difference]: Without dead ends: 4225 [2022-03-03 19:30:47,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 491 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105897 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=62539, Invalid=180017, Unknown=0, NotChecked=0, Total=242556 [2022-03-03 19:30:47,732 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 1012 mSDsluCounter, 723 mSDsCounter, 0 mSdLazyCounter, 3171 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1012 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 3423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 3171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:30:47,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1012 Valid, 287 Invalid, 3423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 3171 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-03 19:30:47,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4225 states. [2022-03-03 19:30:47,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4225 to 354. [2022-03-03 19:30:47,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 2.0793201133144477) internal successors, (734), 353 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:47,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 734 transitions. [2022-03-03 19:30:47,747 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 734 transitions. Word has length 84 [2022-03-03 19:30:47,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:30:47,747 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 734 transitions. [2022-03-03 19:30:47,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.4210526315789473) internal successors, (230), 94 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:47,747 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 734 transitions. [2022-03-03 19:30:47,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-03 19:30:47,747 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:30:47,747 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:30:47,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-03 19:30:47,962 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 [2022-03-03 19:30:47,962 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:30:47,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:30:47,963 INFO L85 PathProgramCache]: Analyzing trace with hash 239879411, now seen corresponding path program 52 times [2022-03-03 19:30:47,963 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:30:47,963 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002208444] [2022-03-03 19:30:47,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:30:47,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:30:47,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:30:48,240 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:48,240 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:30:48,240 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002208444] [2022-03-03 19:30:48,240 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002208444] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:30:48,241 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096085261] [2022-03-03 19:30:48,241 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:30:48,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:30:48,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:30:48,242 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) [2022-03-03 19:30:48,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-03 19:30:48,282 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:30:48,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:30:48,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 75 conjunts are in the unsatisfiable core [2022-03-03 19:30:48,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:30:48,584 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:48,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:30:48,890 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:48,891 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096085261] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:30:48,891 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:30:48,891 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 21 [2022-03-03 19:30:48,891 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474855260] [2022-03-03 19:30:48,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:30:48,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 19:30:48,892 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:30:48,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 19:30:48,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:30:48,893 INFO L87 Difference]: Start difference. First operand 354 states and 734 transitions. Second operand has 21 states, 21 states have (on average 4.095238095238095) internal successors, (86), 21 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:49,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:30:49,560 INFO L93 Difference]: Finished difference Result 1106 states and 2181 transitions. [2022-03-03 19:30:49,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-03 19:30:49,560 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.095238095238095) internal successors, (86), 21 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2022-03-03 19:30:49,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:30:49,561 INFO L225 Difference]: With dead ends: 1106 [2022-03-03 19:30:49,561 INFO L226 Difference]: Without dead ends: 983 [2022-03-03 19:30:49,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 187 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:30:49,562 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 164 mSDsluCounter, 3500 mSDsCounter, 0 mSdLazyCounter, 2187 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 2592 SdHoareTripleChecker+Invalid, 2188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:30:49,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 2592 Invalid, 2188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2187 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 19:30:49,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2022-03-03 19:30:49,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 745. [2022-03-03 19:30:49,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 744 states have (on average 2.157258064516129) internal successors, (1605), 744 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:49,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1605 transitions. [2022-03-03 19:30:49,569 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1605 transitions. Word has length 86 [2022-03-03 19:30:49,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:30:49,569 INFO L470 AbstractCegarLoop]: Abstraction has 745 states and 1605 transitions. [2022-03-03 19:30:49,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.095238095238095) internal successors, (86), 21 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:49,569 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1605 transitions. [2022-03-03 19:30:49,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-03-03 19:30:49,570 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:30:49,570 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:30:49,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-03 19:30:49,787 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 [2022-03-03 19:30:49,787 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:30:49,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:30:49,787 INFO L85 PathProgramCache]: Analyzing trace with hash -756560911, now seen corresponding path program 53 times [2022-03-03 19:30:49,787 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:30:49,787 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011872009] [2022-03-03 19:30:49,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:30:49,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:30:49,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:30:50,407 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 324 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:50,407 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:30:50,408 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011872009] [2022-03-03 19:30:50,408 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011872009] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:30:50,408 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453676079] [2022-03-03 19:30:50,408 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:30:50,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:30:50,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:30:50,409 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) [2022-03-03 19:30:50,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-03 19:30:50,460 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2022-03-03 19:30:50,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:30:50,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-03 19:30:50,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:30:51,749 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 324 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:51,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:30:52,485 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 361 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:52,485 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453676079] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:30:52,485 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:30:52,485 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 100 [2022-03-03 19:30:52,485 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962892384] [2022-03-03 19:30:52,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:30:52,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-03-03 19:30:52,486 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:30:52,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-03-03 19:30:52,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1778, Invalid=8322, Unknown=0, NotChecked=0, Total=10100 [2022-03-03 19:30:52,487 INFO L87 Difference]: Start difference. First operand 745 states and 1605 transitions. Second operand has 101 states, 101 states have (on average 2.089108910891089) internal successors, (211), 100 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:31:24,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:31:24,607 INFO L93 Difference]: Finished difference Result 8953 states and 17132 transitions. [2022-03-03 19:31:24,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 633 states. [2022-03-03 19:31:24,608 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.089108910891089) internal successors, (211), 100 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2022-03-03 19:31:24,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:31:24,616 INFO L225 Difference]: With dead ends: 8953 [2022-03-03 19:31:24,616 INFO L226 Difference]: Without dead ends: 6520 [2022-03-03 19:31:24,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 845 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 728 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249299 ImplicationChecksByTransitivity, 23.5s TimeCoverageRelationStatistics Valid=129908, Invalid=402262, Unknown=0, NotChecked=0, Total=532170 [2022-03-03 19:31:24,639 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1805 mSDsluCounter, 1844 mSDsCounter, 0 mSdLazyCounter, 5091 mSolverCounterSat, 363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1805 SdHoareTripleChecker+Valid, 789 SdHoareTripleChecker+Invalid, 5454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 363 IncrementalHoareTripleChecker+Valid, 5091 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:31:24,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1805 Valid, 789 Invalid, 5454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [363 Valid, 5091 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-03-03 19:31:24,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6520 states. [2022-03-03 19:31:24,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6520 to 444. [2022-03-03 19:31:24,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 2.0654627539503387) internal successors, (915), 443 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:31:24,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 915 transitions. [2022-03-03 19:31:24,695 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 915 transitions. Word has length 88 [2022-03-03 19:31:24,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:31:24,695 INFO L470 AbstractCegarLoop]: Abstraction has 444 states and 915 transitions. [2022-03-03 19:31:24,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.089108910891089) internal successors, (211), 100 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:31:24,696 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 915 transitions. [2022-03-03 19:31:24,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-03-03 19:31:24,696 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:31:24,696 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:31:24,713 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-03-03 19:31:24,912 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 [2022-03-03 19:31:24,912 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:31:24,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:31:24,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1445729767, now seen corresponding path program 54 times [2022-03-03 19:31:24,913 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:31:24,913 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939120311] [2022-03-03 19:31:24,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:31:24,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:31:24,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:31:25,198 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 343 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:31:25,198 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:31:25,198 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939120311] [2022-03-03 19:31:25,198 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939120311] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:31:25,198 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491951143] [2022-03-03 19:31:25,198 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:31:25,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:31:25,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:31:25,199 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) [2022-03-03 19:31:25,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-03 19:31:25,242 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2022-03-03 19:31:25,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:31:25,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-03 19:31:25,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:31:26,599 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 343 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:31:26,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:31:27,785 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 361 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:31:27,785 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491951143] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:31:27,785 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:31:27,785 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 41, 41] total 99 [2022-03-03 19:31:27,785 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452702414] [2022-03-03 19:31:27,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:31:27,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-03-03 19:31:27,786 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:31:27,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-03-03 19:31:27,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2342, Invalid=7558, Unknown=0, NotChecked=0, Total=9900 [2022-03-03 19:31:27,787 INFO L87 Difference]: Start difference. First operand 444 states and 915 transitions. Second operand has 100 states, 100 states have (on average 2.42) internal successors, (242), 99 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:31:43,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:31:43,260 INFO L93 Difference]: Finished difference Result 4671 states and 9317 transitions. [2022-03-03 19:31:43,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 443 states. [2022-03-03 19:31:43,260 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.42) internal successors, (242), 99 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2022-03-03 19:31:43,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:31:43,279 INFO L225 Difference]: With dead ends: 4671 [2022-03-03 19:31:43,280 INFO L226 Difference]: Without dead ends: 4667 [2022-03-03 19:31:43,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 654 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 537 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128721 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=74651, Invalid=215331, Unknown=0, NotChecked=0, Total=289982 [2022-03-03 19:31:43,305 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 1531 mSDsluCounter, 748 mSDsCounter, 0 mSdLazyCounter, 3292 mSolverCounterSat, 440 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1531 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 3732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 440 IncrementalHoareTripleChecker+Valid, 3292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:31:43,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1531 Valid, 298 Invalid, 3732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [440 Valid, 3292 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-03 19:31:43,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4667 states. [2022-03-03 19:31:43,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4667 to 372. [2022-03-03 19:31:43,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 2.0808625336927222) internal successors, (772), 371 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:31:43,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 772 transitions. [2022-03-03 19:31:43,325 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 772 transitions. Word has length 88 [2022-03-03 19:31:43,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:31:43,325 INFO L470 AbstractCegarLoop]: Abstraction has 372 states and 772 transitions. [2022-03-03 19:31:43,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.42) internal successors, (242), 99 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:31:43,325 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 772 transitions. [2022-03-03 19:31:43,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-03-03 19:31:43,326 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:31:43,326 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:31:43,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-03-03 19:31:43,542 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 [2022-03-03 19:31:43,542 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:31:43,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:31:43,543 INFO L85 PathProgramCache]: Analyzing trace with hash -2128787793, now seen corresponding path program 55 times [2022-03-03 19:31:43,543 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:31:43,543 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056121673] [2022-03-03 19:31:43,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:31:43,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:31:43,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:31:43,817 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:31:43,817 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:31:43,817 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056121673] [2022-03-03 19:31:43,817 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056121673] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:31:43,818 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466299335] [2022-03-03 19:31:43,818 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:31:43,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:31:43,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:31:43,819 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) [2022-03-03 19:31:43,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-03 19:31:43,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:31:43,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 79 conjunts are in the unsatisfiable core [2022-03-03 19:31:43,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:31:44,166 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:31:44,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:31:44,470 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:31:44,470 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466299335] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:31:44,470 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:31:44,470 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 22 [2022-03-03 19:31:44,470 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107622907] [2022-03-03 19:31:44,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:31:44,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:31:44,471 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:31:44,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:31:44,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:31:44,471 INFO L87 Difference]: Start difference. First operand 372 states and 772 transitions. Second operand has 22 states, 22 states have (on average 4.090909090909091) internal successors, (90), 22 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:31:45,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:31:45,179 INFO L93 Difference]: Finished difference Result 1165 states and 2298 transitions. [2022-03-03 19:31:45,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-03 19:31:45,179 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.090909090909091) internal successors, (90), 22 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2022-03-03 19:31:45,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:31:45,181 INFO L225 Difference]: With dead ends: 1165 [2022-03-03 19:31:45,181 INFO L226 Difference]: Without dead ends: 1036 [2022-03-03 19:31:45,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 196 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:31:45,181 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 173 mSDsluCounter, 3884 mSDsCounter, 0 mSdLazyCounter, 2422 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 2868 SdHoareTripleChecker+Invalid, 2423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:31:45,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 2868 Invalid, 2423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2422 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-03 19:31:45,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2022-03-03 19:31:45,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 785. [2022-03-03 19:31:45,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 2.1581632653061225) internal successors, (1692), 784 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:31:45,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 1692 transitions. [2022-03-03 19:31:45,188 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 1692 transitions. Word has length 90 [2022-03-03 19:31:45,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:31:45,188 INFO L470 AbstractCegarLoop]: Abstraction has 785 states and 1692 transitions. [2022-03-03 19:31:45,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.090909090909091) internal successors, (90), 22 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:31:45,189 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 1692 transitions. [2022-03-03 19:31:45,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-03-03 19:31:45,189 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:31:45,189 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:31:45,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-03-03 19:31:45,404 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 [2022-03-03 19:31:45,404 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:31:45,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:31:45,404 INFO L85 PathProgramCache]: Analyzing trace with hash -293527891, now seen corresponding path program 56 times [2022-03-03 19:31:45,404 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:31:45,404 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130803990] [2022-03-03 19:31:45,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:31:45,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:31:45,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:31:46,066 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 361 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:31:46,067 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:31:46,067 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130803990] [2022-03-03 19:31:46,067 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130803990] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:31:46,067 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331477485] [2022-03-03 19:31:46,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:31:46,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:31:46,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:31:46,068 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) [2022-03-03 19:31:46,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-03 19:31:46,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:31:46,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:31:46,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-03 19:31:46,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:31:47,557 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 361 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:31:47,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:31:48,367 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 400 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:31:48,367 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331477485] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:31:48,367 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:31:48,367 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 43] total 105 [2022-03-03 19:31:48,367 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128054668] [2022-03-03 19:31:48,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:31:48,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-03-03 19:31:48,368 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:31:48,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-03-03 19:31:48,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1951, Invalid=9179, Unknown=0, NotChecked=0, Total=11130 [2022-03-03 19:31:48,370 INFO L87 Difference]: Start difference. First operand 785 states and 1692 transitions. Second operand has 106 states, 106 states have (on average 2.0849056603773586) internal successors, (221), 105 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:32:24,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:32:24,559 INFO L93 Difference]: Finished difference Result 9829 states and 18804 transitions. [2022-03-03 19:32:24,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 696 states. [2022-03-03 19:32:24,560 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.0849056603773586) internal successors, (221), 105 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-03-03 19:32:24,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:32:24,569 INFO L225 Difference]: With dead ends: 9829 [2022-03-03 19:32:24,569 INFO L226 Difference]: Without dead ends: 7144 [2022-03-03 19:32:24,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 918 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 796 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302538 ImplicationChecksByTransitivity, 25.3s TimeCoverageRelationStatistics Valid=155454, Invalid=480552, Unknown=0, NotChecked=0, Total=636006 [2022-03-03 19:32:24,602 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 2440 mSDsluCounter, 1880 mSDsCounter, 0 mSdLazyCounter, 5220 mSolverCounterSat, 452 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2440 SdHoareTripleChecker+Valid, 844 SdHoareTripleChecker+Invalid, 5672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 452 IncrementalHoareTripleChecker+Valid, 5220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:32:24,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2440 Valid, 844 Invalid, 5672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [452 Valid, 5220 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-03-03 19:32:24,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7144 states. [2022-03-03 19:32:24,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7144 to 466. [2022-03-03 19:32:24,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 2.066666666666667) internal successors, (961), 465 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) [2022-03-03 19:32:24,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 961 transitions. [2022-03-03 19:32:24,634 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 961 transitions. Word has length 92 [2022-03-03 19:32:24,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:32:24,634 INFO L470 AbstractCegarLoop]: Abstraction has 466 states and 961 transitions. [2022-03-03 19:32:24,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 2.0849056603773586) internal successors, (221), 105 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:32:24,634 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 961 transitions. [2022-03-03 19:32:24,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-03-03 19:32:24,635 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:32:24,635 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:32:24,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-03-03 19:32:24,851 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 [2022-03-03 19:32:24,851 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:32:24,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:32:24,852 INFO L85 PathProgramCache]: Analyzing trace with hash -226373657, now seen corresponding path program 57 times [2022-03-03 19:32:24,852 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:32:24,852 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455660556] [2022-03-03 19:32:24,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:32:24,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:32:24,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:32:25,209 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 381 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:32:25,209 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:32:25,209 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455660556] [2022-03-03 19:32:25,209 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455660556] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:32:25,209 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575138573] [2022-03-03 19:32:25,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:32:25,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:32:25,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:32:25,211 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) [2022-03-03 19:32:25,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-03 19:32:25,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2022-03-03 19:32:25,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:32:25,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-03 19:32:25,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:32:26,673 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 381 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:32:26,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:32:27,879 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 400 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:32:27,880 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575138573] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:32:27,880 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:32:27,880 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 43, 43] total 104 [2022-03-03 19:32:27,880 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344870691] [2022-03-03 19:32:27,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:32:27,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-03-03 19:32:27,880 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:32:27,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-03-03 19:32:27,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2575, Invalid=8345, Unknown=0, NotChecked=0, Total=10920 [2022-03-03 19:32:27,883 INFO L87 Difference]: Start difference. First operand 466 states and 961 transitions. Second operand has 105 states, 105 states have (on average 2.419047619047619) internal successors, (254), 104 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:32:44,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:32:44,367 INFO L93 Difference]: Finished difference Result 5135 states and 10245 transitions. [2022-03-03 19:32:44,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 486 states. [2022-03-03 19:32:44,367 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.419047619047619) internal successors, (254), 104 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-03-03 19:32:44,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:32:44,372 INFO L225 Difference]: With dead ends: 5135 [2022-03-03 19:32:44,372 INFO L226 Difference]: Without dead ends: 5131 [2022-03-03 19:32:44,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 707 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 585 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155069 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=88429, Invalid=255553, Unknown=0, NotChecked=0, Total=343982 [2022-03-03 19:32:44,386 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 1144 mSDsluCounter, 800 mSDsCounter, 0 mSdLazyCounter, 3493 mSolverCounterSat, 305 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1144 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 3798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 305 IncrementalHoareTripleChecker+Valid, 3493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:32:44,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1144 Valid, 312 Invalid, 3798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [305 Valid, 3493 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-03 19:32:44,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5131 states. [2022-03-03 19:32:44,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5131 to 390. [2022-03-03 19:32:44,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.082262210796915) internal successors, (810), 389 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:32:44,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 810 transitions. [2022-03-03 19:32:44,402 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 810 transitions. Word has length 92 [2022-03-03 19:32:44,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:32:44,403 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 810 transitions. [2022-03-03 19:32:44,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.419047619047619) internal successors, (254), 104 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:32:44,403 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 810 transitions. [2022-03-03 19:32:44,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-03-03 19:32:44,403 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:32:44,403 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:32:44,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-03-03 19:32:44,619 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 [2022-03-03 19:32:44,619 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:32:44,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:32:44,619 INFO L85 PathProgramCache]: Analyzing trace with hash 464312939, now seen corresponding path program 58 times [2022-03-03 19:32:44,619 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:32:44,619 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195063109] [2022-03-03 19:32:44,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:32:44,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:32:44,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:32:44,856 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:32:44,857 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:32:44,860 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195063109] [2022-03-03 19:32:44,860 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195063109] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:32:44,860 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030936648] [2022-03-03 19:32:44,860 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:32:44,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:32:44,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:32:44,861 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) [2022-03-03 19:32:44,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-03 19:32:44,926 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:32:44,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:32:44,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 83 conjunts are in the unsatisfiable core [2022-03-03 19:32:44,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:32:45,109 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:32:45,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:32:45,292 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:32:45,292 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030936648] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:32:45,292 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:32:45,292 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 23 [2022-03-03 19:32:45,292 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426386902] [2022-03-03 19:32:45,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:32:45,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:32:45,292 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:32:45,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:32:45,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:32:45,293 INFO L87 Difference]: Start difference. First operand 390 states and 810 transitions. Second operand has 23 states, 23 states have (on average 4.086956521739131) internal successors, (94), 23 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:32:45,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:32:45,784 INFO L93 Difference]: Finished difference Result 1224 states and 2415 transitions. [2022-03-03 19:32:45,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-03 19:32:45,784 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.086956521739131) internal successors, (94), 23 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2022-03-03 19:32:45,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:32:45,786 INFO L225 Difference]: With dead ends: 1224 [2022-03-03 19:32:45,786 INFO L226 Difference]: Without dead ends: 1089 [2022-03-03 19:32:45,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 205 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:32:45,786 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 182 mSDsluCounter, 4288 mSDsCounter, 0 mSdLazyCounter, 2669 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 3158 SdHoareTripleChecker+Invalid, 2670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:32:45,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 3158 Invalid, 2670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2669 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 19:32:45,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2022-03-03 19:32:45,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 825. [2022-03-03 19:32:45,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 825 states, 824 states have (on average 2.158980582524272) internal successors, (1779), 824 states have internal predecessors, (1779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:32:45,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 1779 transitions. [2022-03-03 19:32:45,794 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 1779 transitions. Word has length 94 [2022-03-03 19:32:45,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:32:45,795 INFO L470 AbstractCegarLoop]: Abstraction has 825 states and 1779 transitions. [2022-03-03 19:32:45,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.086956521739131) internal successors, (94), 23 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:32:45,795 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 1779 transitions. [2022-03-03 19:32:45,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-03-03 19:32:45,796 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:32:45,796 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:32:45,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-03-03 19:32:46,013 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 [2022-03-03 19:32:46,013 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:32:46,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:32:46,013 INFO L85 PathProgramCache]: Analyzing trace with hash 55083881, now seen corresponding path program 59 times [2022-03-03 19:32:46,013 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:32:46,013 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571962212] [2022-03-03 19:32:46,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:32:46,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:32:46,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:32:46,735 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 400 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:32:46,736 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:32:46,736 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571962212] [2022-03-03 19:32:46,736 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571962212] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:32:46,736 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120597025] [2022-03-03 19:32:46,736 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:32:46,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:32:46,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:32:46,737 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) [2022-03-03 19:32:46,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-03 19:32:46,781 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2022-03-03 19:32:46,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:32:46,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-03 19:32:46,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:32:48,037 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 400 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:32:48,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:32:48,741 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 441 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:32:48,742 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120597025] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:32:48,742 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:32:48,742 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45, 45] total 110 [2022-03-03 19:32:48,742 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958749886] [2022-03-03 19:32:48,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:32:48,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-03-03 19:32:48,742 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:32:48,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-03-03 19:32:48,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2132, Invalid=10078, Unknown=0, NotChecked=0, Total=12210 [2022-03-03 19:32:48,744 INFO L87 Difference]: Start difference. First operand 825 states and 1779 transitions. Second operand has 111 states, 111 states have (on average 2.081081081081081) internal successors, (231), 110 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:33:28,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:33:28,704 INFO L93 Difference]: Finished difference Result 10745 states and 20552 transitions. [2022-03-03 19:33:28,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 762 states. [2022-03-03 19:33:28,704 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.081081081081081) internal successors, (231), 110 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2022-03-03 19:33:28,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:33:28,712 INFO L225 Difference]: With dead ends: 10745 [2022-03-03 19:33:28,712 INFO L226 Difference]: Without dead ends: 7796 [2022-03-03 19:33:28,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 994 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 867 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363935 ImplicationChecksByTransitivity, 26.4s TimeCoverageRelationStatistics Valid=184600, Invalid=569692, Unknown=0, NotChecked=0, Total=754292 [2022-03-03 19:33:28,805 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1611 mSDsluCounter, 2252 mSDsCounter, 0 mSdLazyCounter, 6520 mSolverCounterSat, 344 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1611 SdHoareTripleChecker+Valid, 933 SdHoareTripleChecker+Invalid, 6864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 344 IncrementalHoareTripleChecker+Valid, 6520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:33:28,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1611 Valid, 933 Invalid, 6864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [344 Valid, 6520 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-03-03 19:33:28,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7796 states. [2022-03-03 19:33:28,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7796 to 488. [2022-03-03 19:33:28,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 487 states have (on average 2.0677618069815193) internal successors, (1007), 487 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:33:28,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 1007 transitions. [2022-03-03 19:33:28,829 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 1007 transitions. Word has length 96 [2022-03-03 19:33:28,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:33:28,829 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 1007 transitions. [2022-03-03 19:33:28,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 2.081081081081081) internal successors, (231), 110 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:33:28,829 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 1007 transitions. [2022-03-03 19:33:28,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-03-03 19:33:28,830 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:33:28,830 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:33:28,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-03-03 19:33:29,046 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 [2022-03-03 19:33:29,046 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:33:29,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:33:29,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1250482919, now seen corresponding path program 60 times [2022-03-03 19:33:29,046 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:33:29,046 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015187587] [2022-03-03 19:33:29,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:33:29,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:33:29,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:33:29,322 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 421 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:33:29,323 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:33:29,323 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015187587] [2022-03-03 19:33:29,323 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015187587] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:33:29,323 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107333318] [2022-03-03 19:33:29,323 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:33:29,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:33:29,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:33:29,324 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) [2022-03-03 19:33:29,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-03 19:33:29,372 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2022-03-03 19:33:29,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:33:29,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-03 19:33:29,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:33:30,786 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 421 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:33:30,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:33:32,029 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 441 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:33:32,029 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107333318] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:33:32,029 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:33:32,029 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 45, 45] total 109 [2022-03-03 19:33:32,029 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24225749] [2022-03-03 19:33:32,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:33:32,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-03-03 19:33:32,030 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:33:32,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-03-03 19:33:32,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2819, Invalid=9171, Unknown=0, NotChecked=0, Total=11990 [2022-03-03 19:33:32,032 INFO L87 Difference]: Start difference. First operand 488 states and 1007 transitions. Second operand has 110 states, 110 states have (on average 2.418181818181818) internal successors, (266), 109 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:33:52,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:33:52,520 INFO L93 Difference]: Finished difference Result 5621 states and 11217 transitions. [2022-03-03 19:33:52,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 531 states. [2022-03-03 19:33:52,520 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.418181818181818) internal successors, (266), 109 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2022-03-03 19:33:52,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:33:52,525 INFO L225 Difference]: With dead ends: 5621 [2022-03-03 19:33:52,525 INFO L226 Difference]: Without dead ends: 5617 [2022-03-03 19:33:52,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 762 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 635 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185289 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=104018, Invalid=301114, Unknown=0, NotChecked=0, Total=405132 [2022-03-03 19:33:52,546 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 1720 mSDsluCounter, 785 mSDsCounter, 0 mSdLazyCounter, 3564 mSolverCounterSat, 430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1720 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 3994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 430 IncrementalHoareTripleChecker+Valid, 3564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:33:52,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1720 Valid, 330 Invalid, 3994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [430 Valid, 3564 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-03 19:33:52,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5617 states. [2022-03-03 19:33:52,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5617 to 408. [2022-03-03 19:33:52,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 2.0835380835380835) internal successors, (848), 407 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:33:52,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 848 transitions. [2022-03-03 19:33:52,565 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 848 transitions. Word has length 96 [2022-03-03 19:33:52,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:33:52,566 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 848 transitions. [2022-03-03 19:33:52,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 2.418181818181818) internal successors, (266), 109 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:33:52,566 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 848 transitions. [2022-03-03 19:33:52,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-03-03 19:33:52,566 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:33:52,566 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:33:52,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-03-03 19:33:52,775 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 [2022-03-03 19:33:52,775 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:33:52,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:33:52,776 INFO L85 PathProgramCache]: Analyzing trace with hash 472776743, now seen corresponding path program 61 times [2022-03-03 19:33:52,776 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:33:52,776 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654275226] [2022-03-03 19:33:52,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:33:52,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:33:52,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:33:53,037 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 0 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:33:53,038 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:33:53,038 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654275226] [2022-03-03 19:33:53,038 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654275226] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:33:53,038 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460803277] [2022-03-03 19:33:53,038 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:33:53,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:33:53,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:33:53,041 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) [2022-03-03 19:33:53,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-03 19:33:53,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:33:53,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 87 conjunts are in the unsatisfiable core [2022-03-03 19:33:53,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:33:53,322 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 0 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:33:53,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:33:53,618 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 0 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:33:53,618 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460803277] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:33:53,618 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:33:53,618 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 24 [2022-03-03 19:33:53,618 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506111240] [2022-03-03 19:33:53,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:33:53,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:33:53,619 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:33:53,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:33:53,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:33:53,619 INFO L87 Difference]: Start difference. First operand 408 states and 848 transitions. Second operand has 24 states, 24 states have (on average 4.083333333333333) internal successors, (98), 24 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:33:54,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:33:54,476 INFO L93 Difference]: Finished difference Result 1283 states and 2532 transitions. [2022-03-03 19:33:54,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-03 19:33:54,477 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.083333333333333) internal successors, (98), 24 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2022-03-03 19:33:54,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:33:54,478 INFO L225 Difference]: With dead ends: 1283 [2022-03-03 19:33:54,478 INFO L226 Difference]: Without dead ends: 1142 [2022-03-03 19:33:54,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 214 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:33:54,479 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 191 mSDsluCounter, 4712 mSDsCounter, 0 mSdLazyCounter, 2928 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 3462 SdHoareTripleChecker+Invalid, 2929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 19:33:54,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 3462 Invalid, 2929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2928 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-03 19:33:54,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1142 states. [2022-03-03 19:33:54,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1142 to 865. [2022-03-03 19:33:54,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 864 states have (on average 2.1597222222222223) internal successors, (1866), 864 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:33:54,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 1866 transitions. [2022-03-03 19:33:54,487 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 1866 transitions. Word has length 98 [2022-03-03 19:33:54,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:33:54,487 INFO L470 AbstractCegarLoop]: Abstraction has 865 states and 1866 transitions. [2022-03-03 19:33:54,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.083333333333333) internal successors, (98), 24 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:33:54,487 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 1866 transitions. [2022-03-03 19:33:54,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-03-03 19:33:54,488 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:33:54,488 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:33:54,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-03-03 19:33:54,688 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 [2022-03-03 19:33:54,688 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:33:54,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:33:54,689 INFO L85 PathProgramCache]: Analyzing trace with hash 196147749, now seen corresponding path program 62 times [2022-03-03 19:33:54,689 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:33:54,689 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713481183] [2022-03-03 19:33:54,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:33:54,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:33:54,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:33:55,452 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 441 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:33:55,452 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:33:55,452 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713481183] [2022-03-03 19:33:55,453 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713481183] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:33:55,453 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668662783] [2022-03-03 19:33:55,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:33:55,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:33:55,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:33:55,459 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) [2022-03-03 19:33:55,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-03 19:33:55,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:33:55,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:33:55,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-03 19:33:55,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:33:56,975 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 441 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:33:56,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:33:57,627 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 484 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:33:57,627 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668662783] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:33:57,628 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:33:57,628 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47, 47] total 115 [2022-03-03 19:33:57,628 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072044209] [2022-03-03 19:33:57,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:33:57,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-03-03 19:33:57,628 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:33:57,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-03-03 19:33:57,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2321, Invalid=11019, Unknown=0, NotChecked=0, Total=13340 [2022-03-03 19:33:57,631 INFO L87 Difference]: Start difference. First operand 865 states and 1866 transitions. Second operand has 116 states, 116 states have (on average 2.0775862068965516) internal successors, (241), 115 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:34:46,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:34:46,561 INFO L93 Difference]: Finished difference Result 11701 states and 22376 transitions. [2022-03-03 19:34:46,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 831 states. [2022-03-03 19:34:46,561 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.0775862068965516) internal successors, (241), 115 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2022-03-03 19:34:46,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:34:46,573 INFO L225 Difference]: With dead ends: 11701 [2022-03-03 19:34:46,573 INFO L226 Difference]: Without dead ends: 8476 [2022-03-03 19:34:46,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1073 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 941 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434284 ImplicationChecksByTransitivity, 31.9s TimeCoverageRelationStatistics Valid=217670, Invalid=670636, Unknown=0, NotChecked=0, Total=888306 [2022-03-03 19:34:46,617 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1966 mSDsluCounter, 2198 mSDsCounter, 0 mSdLazyCounter, 6012 mSolverCounterSat, 377 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1966 SdHoareTripleChecker+Valid, 931 SdHoareTripleChecker+Invalid, 6389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 377 IncrementalHoareTripleChecker+Valid, 6012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-03-03 19:34:46,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1966 Valid, 931 Invalid, 6389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [377 Valid, 6012 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-03-03 19:34:46,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8476 states. [2022-03-03 19:34:46,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8476 to 510. [2022-03-03 19:34:46,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 509 states have (on average 2.068762278978389) internal successors, (1053), 509 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:34:46,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 1053 transitions. [2022-03-03 19:34:46,739 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 1053 transitions. Word has length 100 [2022-03-03 19:34:46,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:34:46,739 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 1053 transitions. [2022-03-03 19:34:46,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 2.0775862068965516) internal successors, (241), 115 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:34:46,739 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 1053 transitions. [2022-03-03 19:34:46,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-03-03 19:34:46,740 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:34:46,740 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:34:46,756 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-03-03 19:34:46,940 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 [2022-03-03 19:34:46,940 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:34:46,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:34:46,941 INFO L85 PathProgramCache]: Analyzing trace with hash -991922457, now seen corresponding path program 63 times [2022-03-03 19:34:46,941 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:34:46,941 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504939836] [2022-03-03 19:34:46,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:34:46,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:34:46,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:34:47,290 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 463 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:47,291 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:34:47,291 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504939836] [2022-03-03 19:34:47,291 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504939836] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:34:47,291 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984045671] [2022-03-03 19:34:47,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:34:47,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:34:47,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:34:47,292 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) [2022-03-03 19:34:47,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-03 19:34:47,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2022-03-03 19:34:47,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:34:47,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-03 19:34:47,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:34:48,336 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 463 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:48,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:34:49,235 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 484 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:49,235 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984045671] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:34:49,236 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:34:49,236 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 47, 47] total 114 [2022-03-03 19:34:49,236 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602429880] [2022-03-03 19:34:49,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:34:49,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-03-03 19:34:49,236 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:34:49,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-03-03 19:34:49,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3074, Invalid=10036, Unknown=0, NotChecked=0, Total=13110 [2022-03-03 19:34:49,239 INFO L87 Difference]: Start difference. First operand 510 states and 1053 transitions. Second operand has 115 states, 115 states have (on average 2.417391304347826) internal successors, (278), 114 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:35:12,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:35:12,676 INFO L93 Difference]: Finished difference Result 6129 states and 12233 transitions. [2022-03-03 19:35:12,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 578 states. [2022-03-03 19:35:12,677 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 2.417391304347826) internal successors, (278), 114 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2022-03-03 19:35:12,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:35:12,682 INFO L225 Difference]: With dead ends: 6129 [2022-03-03 19:35:12,682 INFO L226 Difference]: Without dead ends: 6125 [2022-03-03 19:35:12,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 819 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 687 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219745 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=121569, Invalid=352463, Unknown=0, NotChecked=0, Total=474032 [2022-03-03 19:35:12,711 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 1846 mSDsluCounter, 802 mSDsCounter, 0 mSdLazyCounter, 3465 mSolverCounterSat, 446 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1846 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 3911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 446 IncrementalHoareTripleChecker+Valid, 3465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:35:12,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1846 Valid, 331 Invalid, 3911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [446 Valid, 3465 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-03 19:35:12,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6125 states. [2022-03-03 19:35:12,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6125 to 426. [2022-03-03 19:35:12,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 2.084705882352941) internal successors, (886), 425 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:35:12,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 886 transitions. [2022-03-03 19:35:12,729 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 886 transitions. Word has length 100 [2022-03-03 19:35:12,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:35:12,729 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 886 transitions. [2022-03-03 19:35:12,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 2.417391304347826) internal successors, (278), 114 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:35:12,730 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 886 transitions. [2022-03-03 19:35:12,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-03 19:35:12,730 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:35:12,730 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:35:12,747 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-03-03 19:35:12,945 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 [2022-03-03 19:35:12,946 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:35:12,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:35:12,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1403799581, now seen corresponding path program 64 times [2022-03-03 19:35:12,946 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:35:12,946 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231459055] [2022-03-03 19:35:12,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:35:12,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:35:12,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:35:13,288 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:35:13,288 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:35:13,288 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231459055] [2022-03-03 19:35:13,288 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231459055] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:35:13,288 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505962058] [2022-03-03 19:35:13,288 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:35:13,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:35:13,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:35:13,290 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) [2022-03-03 19:35:13,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-03 19:35:13,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:35:13,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:35:13,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 91 conjunts are in the unsatisfiable core [2022-03-03 19:35:13,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:35:13,504 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:35:13,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:35:13,678 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:35:13,678 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505962058] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:35:13,678 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:35:13,678 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 25 [2022-03-03 19:35:13,678 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134721533] [2022-03-03 19:35:13,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:35:13,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:35:13,679 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:35:13,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:35:13,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:35:13,679 INFO L87 Difference]: Start difference. First operand 426 states and 886 transitions. Second operand has 25 states, 25 states have (on average 4.08) internal successors, (102), 25 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:35:14,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:35:14,257 INFO L93 Difference]: Finished difference Result 1342 states and 2649 transitions. [2022-03-03 19:35:14,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-03 19:35:14,257 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.08) internal successors, (102), 25 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2022-03-03 19:35:14,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:35:14,258 INFO L225 Difference]: With dead ends: 1342 [2022-03-03 19:35:14,258 INFO L226 Difference]: Without dead ends: 1195 [2022-03-03 19:35:14,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 223 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:35:14,259 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 200 mSDsluCounter, 5156 mSDsCounter, 0 mSdLazyCounter, 3199 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 3780 SdHoareTripleChecker+Invalid, 3200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:35:14,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 3780 Invalid, 3200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3199 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 19:35:14,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2022-03-03 19:35:14,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 905. [2022-03-03 19:35:14,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 904 states have (on average 2.1603982300884956) internal successors, (1953), 904 states have internal predecessors, (1953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:35:14,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1953 transitions. [2022-03-03 19:35:14,267 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1953 transitions. Word has length 102 [2022-03-03 19:35:14,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:35:14,267 INFO L470 AbstractCegarLoop]: Abstraction has 905 states and 1953 transitions. [2022-03-03 19:35:14,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.08) internal successors, (102), 25 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:35:14,267 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1953 transitions. [2022-03-03 19:35:14,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-03 19:35:14,268 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:35:14,268 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:35:14,283 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-03-03 19:35:14,469 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 [2022-03-03 19:35:14,469 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:35:14,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:35:14,469 INFO L85 PathProgramCache]: Analyzing trace with hash -844266783, now seen corresponding path program 65 times [2022-03-03 19:35:14,469 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:35:14,469 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310562336] [2022-03-03 19:35:14,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:35:14,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:35:14,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:35:15,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 484 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:35:15,061 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:35:15,061 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310562336] [2022-03-03 19:35:15,061 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310562336] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:35:15,061 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443183288] [2022-03-03 19:35:15,062 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:35:15,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:35:15,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:35:15,063 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) [2022-03-03 19:35:15,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-03 19:35:15,117 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-03-03 19:35:15,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:35:15,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-03 19:35:15,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:35:16,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 484 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:35:16,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:35:16,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 529 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:35:16,930 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443183288] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:35:16,930 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:35:16,931 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 49] total 120 [2022-03-03 19:35:16,931 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932594077] [2022-03-03 19:35:16,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:35:16,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-03-03 19:35:16,931 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:35:16,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-03-03 19:35:16,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2518, Invalid=12002, Unknown=0, NotChecked=0, Total=14520 [2022-03-03 19:35:16,933 INFO L87 Difference]: Start difference. First operand 905 states and 1953 transitions. Second operand has 121 states, 121 states have (on average 2.074380165289256) internal successors, (251), 120 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:36:14,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:36:14,430 INFO L93 Difference]: Finished difference Result 12697 states and 24276 transitions. [2022-03-03 19:36:14,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 903 states. [2022-03-03 19:36:14,430 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 2.074380165289256) internal successors, (251), 120 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2022-03-03 19:36:14,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:36:14,442 INFO L225 Difference]: With dead ends: 12697 [2022-03-03 19:36:14,442 INFO L226 Difference]: Without dead ends: 9184 [2022-03-03 19:36:14,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1155 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 1018 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514425 ImplicationChecksByTransitivity, 36.3s TimeCoverageRelationStatistics Valid=255002, Invalid=784378, Unknown=0, NotChecked=0, Total=1039380 [2022-03-03 19:36:14,484 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 2075 mSDsluCounter, 2530 mSDsCounter, 0 mSdLazyCounter, 7087 mSolverCounterSat, 468 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2075 SdHoareTripleChecker+Valid, 1078 SdHoareTripleChecker+Invalid, 7555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 468 IncrementalHoareTripleChecker+Valid, 7087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:36:14,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2075 Valid, 1078 Invalid, 7555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [468 Valid, 7087 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-03-03 19:36:14,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9184 states. [2022-03-03 19:36:14,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9184 to 532. [2022-03-03 19:36:14,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 531 states have (on average 2.0696798493408664) internal successors, (1099), 531 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:36:14,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 1099 transitions. [2022-03-03 19:36:14,520 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 1099 transitions. Word has length 104 [2022-03-03 19:36:14,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:36:14,520 INFO L470 AbstractCegarLoop]: Abstraction has 532 states and 1099 transitions. [2022-03-03 19:36:14,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 2.074380165289256) internal successors, (251), 120 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:36:14,520 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 1099 transitions. [2022-03-03 19:36:14,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-03 19:36:14,521 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:36:14,521 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:36:14,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-03-03 19:36:14,735 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 [2022-03-03 19:36:14,735 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:36:14,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:36:14,736 INFO L85 PathProgramCache]: Analyzing trace with hash 966255591, now seen corresponding path program 66 times [2022-03-03 19:36:14,736 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:36:14,736 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265111108] [2022-03-03 19:36:14,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:36:14,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:36:14,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:36:15,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 507 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:36:15,236 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:36:15,236 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265111108] [2022-03-03 19:36:15,236 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265111108] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:36:15,236 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001619467] [2022-03-03 19:36:15,236 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:36:15,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:36:15,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:36:15,237 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) [2022-03-03 19:36:15,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-03 19:36:15,287 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2022-03-03 19:36:15,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:36:15,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-03 19:36:15,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:36:16,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 507 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:36:16,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:36:18,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 529 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:36:18,101 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001619467] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:36:18,101 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:36:18,101 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 49, 49] total 119 [2022-03-03 19:36:18,101 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691810338] [2022-03-03 19:36:18,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:36:18,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-03-03 19:36:18,102 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:36:18,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-03-03 19:36:18,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3340, Invalid=10940, Unknown=0, NotChecked=0, Total=14280 [2022-03-03 19:36:18,104 INFO L87 Difference]: Start difference. First operand 532 states and 1099 transitions. Second operand has 120 states, 120 states have (on average 2.4166666666666665) internal successors, (290), 119 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:36:45,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:36:45,526 INFO L93 Difference]: Finished difference Result 6659 states and 13293 transitions. [2022-03-03 19:36:45,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 627 states. [2022-03-03 19:36:45,527 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 2.4166666666666665) internal successors, (290), 119 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2022-03-03 19:36:45,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:36:45,533 INFO L225 Difference]: With dead ends: 6659 [2022-03-03 19:36:45,533 INFO L226 Difference]: Without dead ends: 6655 [2022-03-03 19:36:45,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 878 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 741 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258818 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=141239, Invalid=410067, Unknown=0, NotChecked=0, Total=551306 [2022-03-03 19:36:45,560 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 1211 mSDsluCounter, 1011 mSDsCounter, 0 mSdLazyCounter, 4546 mSolverCounterSat, 285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1211 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 4831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 285 IncrementalHoareTripleChecker+Valid, 4546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:36:45,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1211 Valid, 395 Invalid, 4831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [285 Valid, 4546 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-03 19:36:45,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6655 states. [2022-03-03 19:36:45,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6655 to 444. [2022-03-03 19:36:45,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 2.0857787810383748) internal successors, (924), 443 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:36:45,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 924 transitions. [2022-03-03 19:36:45,581 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 924 transitions. Word has length 104 [2022-03-03 19:36:45,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:36:45,581 INFO L470 AbstractCegarLoop]: Abstraction has 444 states and 924 transitions. [2022-03-03 19:36:45,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 2.4166666666666665) internal successors, (290), 119 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:36:45,582 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 924 transitions. [2022-03-03 19:36:45,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-03-03 19:36:45,582 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:36:45,582 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:36:45,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-03-03 19:36:45,798 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 [2022-03-03 19:36:45,798 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:36:45,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:36:45,799 INFO L85 PathProgramCache]: Analyzing trace with hash -514784865, now seen corresponding path program 67 times [2022-03-03 19:36:45,799 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:36:45,799 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394109024] [2022-03-03 19:36:45,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:36:45,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:36:45,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:36:46,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:36:46,165 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:36:46,165 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394109024] [2022-03-03 19:36:46,165 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394109024] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:36:46,165 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046707303] [2022-03-03 19:36:46,165 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:36:46,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:36:46,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:36:46,166 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) [2022-03-03 19:36:46,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-03 19:36:46,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:36:46,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 95 conjunts are in the unsatisfiable core [2022-03-03 19:36:46,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:36:46,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:36:46,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:36:46,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:36:46,911 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046707303] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:36:46,911 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:36:46,911 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 26 [2022-03-03 19:36:46,911 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586958323] [2022-03-03 19:36:46,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:36:46,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:36:46,911 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:36:46,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:36:46,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:36:46,912 INFO L87 Difference]: Start difference. First operand 444 states and 924 transitions. Second operand has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:36:47,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:36:47,941 INFO L93 Difference]: Finished difference Result 1401 states and 2766 transitions. [2022-03-03 19:36:47,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-03 19:36:47,942 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2022-03-03 19:36:47,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:36:47,943 INFO L225 Difference]: With dead ends: 1401 [2022-03-03 19:36:47,943 INFO L226 Difference]: Without dead ends: 1248 [2022-03-03 19:36:47,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 232 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:36:47,944 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 209 mSDsluCounter, 5620 mSDsCounter, 0 mSdLazyCounter, 3482 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 4112 SdHoareTripleChecker+Invalid, 3483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:36:47,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 4112 Invalid, 3483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3482 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-03 19:36:47,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2022-03-03 19:36:47,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 945. [2022-03-03 19:36:47,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 945 states, 944 states have (on average 2.1610169491525424) internal successors, (2040), 944 states have internal predecessors, (2040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:36:47,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 2040 transitions. [2022-03-03 19:36:47,952 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 2040 transitions. Word has length 106 [2022-03-03 19:36:47,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:36:47,952 INFO L470 AbstractCegarLoop]: Abstraction has 945 states and 2040 transitions. [2022-03-03 19:36:47,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:36:47,952 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 2040 transitions. [2022-03-03 19:36:47,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-03-03 19:36:47,953 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:36:47,953 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:36:47,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-03-03 19:36:48,153 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 [2022-03-03 19:36:48,154 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:36:48,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:36:48,154 INFO L85 PathProgramCache]: Analyzing trace with hash -625926755, now seen corresponding path program 68 times [2022-03-03 19:36:48,154 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:36:48,154 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039257123] [2022-03-03 19:36:48,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:36:48,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:36:48,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:36:49,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 529 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:36:49,009 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:36:49,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039257123] [2022-03-03 19:36:49,009 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039257123] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:36:49,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362474409] [2022-03-03 19:36:49,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:36:49,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:36:49,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:36:49,010 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) [2022-03-03 19:36:49,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-03 19:36:49,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:36:49,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:36:49,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-03 19:36:49,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:36:50,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 529 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:36:50,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:36:51,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 576 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:36:51,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362474409] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:36:51,926 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:36:51,926 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51, 51] total 125 [2022-03-03 19:36:51,927 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373189149] [2022-03-03 19:36:51,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:36:51,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-03-03 19:36:51,927 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:36:51,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-03-03 19:36:51,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2723, Invalid=13027, Unknown=0, NotChecked=0, Total=15750 [2022-03-03 19:36:51,930 INFO L87 Difference]: Start difference. First operand 945 states and 2040 transitions. Second operand has 126 states, 126 states have (on average 2.0714285714285716) internal successors, (261), 125 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:58,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:58,839 INFO L93 Difference]: Finished difference Result 13733 states and 26252 transitions. [2022-03-03 19:37:58,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 978 states. [2022-03-03 19:37:58,840 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 2.0714285714285716) internal successors, (261), 125 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2022-03-03 19:37:58,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:58,853 INFO L225 Difference]: With dead ends: 13733 [2022-03-03 19:37:58,854 INFO L226 Difference]: Without dead ends: 9920 [2022-03-03 19:37:58,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1240 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 1098 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605227 ImplicationChecksByTransitivity, 41.8s TimeCoverageRelationStatistics Valid=296948, Invalid=911952, Unknown=0, NotChecked=0, Total=1208900 [2022-03-03 19:37:58,909 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 2176 mSDsluCounter, 2758 mSDsCounter, 0 mSdLazyCounter, 7858 mSolverCounterSat, 470 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2176 SdHoareTripleChecker+Valid, 1144 SdHoareTripleChecker+Invalid, 8328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 470 IncrementalHoareTripleChecker+Valid, 7858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:58,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2176 Valid, 1144 Invalid, 8328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [470 Valid, 7858 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-03-03 19:37:58,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9920 states. [2022-03-03 19:37:58,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9920 to 554. [2022-03-03 19:37:58,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 553 states have (on average 2.0705244122965643) internal successors, (1145), 553 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:58,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 1145 transitions. [2022-03-03 19:37:58,943 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 1145 transitions. Word has length 108 [2022-03-03 19:37:58,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:58,943 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 1145 transitions. [2022-03-03 19:37:58,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 2.0714285714285716) internal successors, (261), 125 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:58,943 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 1145 transitions. [2022-03-03 19:37:58,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-03-03 19:37:58,944 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:58,944 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:37:58,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-03-03 19:37:59,160 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 [2022-03-03 19:37:59,160 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:37:59,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:59,160 INFO L85 PathProgramCache]: Analyzing trace with hash 909009383, now seen corresponding path program 69 times [2022-03-03 19:37:59,160 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:59,160 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856234692] [2022-03-03 19:37:59,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:59,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:59,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:59,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 553 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:59,632 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:59,632 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856234692] [2022-03-03 19:37:59,632 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856234692] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:59,632 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450434259] [2022-03-03 19:37:59,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:37:59,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:59,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:59,634 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) [2022-03-03 19:37:59,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-03 19:37:59,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2022-03-03 19:37:59,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:37:59,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-03 19:37:59,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:38:01,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 553 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:01,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:38:02,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 576 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:02,441 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450434259] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:38:02,441 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:38:02,441 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 51, 51] total 124 [2022-03-03 19:38:02,441 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078080789] [2022-03-03 19:38:02,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:38:02,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2022-03-03 19:38:02,442 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:38:02,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2022-03-03 19:38:02,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3617, Invalid=11883, Unknown=0, NotChecked=0, Total=15500 [2022-03-03 19:38:02,444 INFO L87 Difference]: Start difference. First operand 554 states and 1145 transitions. Second operand has 125 states, 125 states have (on average 2.416) internal successors, (302), 124 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:34,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:38:34,757 INFO L93 Difference]: Finished difference Result 7211 states and 14397 transitions. [2022-03-03 19:38:34,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 678 states. [2022-03-03 19:38:34,757 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 2.416) internal successors, (302), 124 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2022-03-03 19:38:34,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:38:34,765 INFO L225 Difference]: With dead ends: 7211 [2022-03-03 19:38:34,765 INFO L226 Difference]: Without dead ends: 7207 [2022-03-03 19:38:34,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 939 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 797 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302905 ImplicationChecksByTransitivity, 23.1s TimeCoverageRelationStatistics Valid=163191, Invalid=474411, Unknown=0, NotChecked=0, Total=637602 [2022-03-03 19:38:34,796 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 2123 mSDsluCounter, 1026 mSDsCounter, 0 mSdLazyCounter, 4442 mSolverCounterSat, 683 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2123 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 5125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 683 IncrementalHoareTripleChecker+Valid, 4442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:38:34,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2123 Valid, 398 Invalid, 5125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [683 Valid, 4442 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-03-03 19:38:34,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7207 states. [2022-03-03 19:38:34,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7207 to 462. [2022-03-03 19:38:34,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 2.0867678958785247) internal successors, (962), 461 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:34,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 962 transitions. [2022-03-03 19:38:34,817 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 962 transitions. Word has length 108 [2022-03-03 19:38:34,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:38:34,817 INFO L470 AbstractCegarLoop]: Abstraction has 462 states and 962 transitions. [2022-03-03 19:38:34,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 2.416) internal successors, (302), 124 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:34,817 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 962 transitions. [2022-03-03 19:38:34,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-03 19:38:34,818 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:38:34,818 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:38:34,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-03-03 19:38:35,031 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 [2022-03-03 19:38:35,031 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:38:35,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:38:35,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1143415461, now seen corresponding path program 70 times [2022-03-03 19:38:35,032 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:38:35,032 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668002519] [2022-03-03 19:38:35,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:38:35,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:38:35,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:38:35,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 0 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:35,358 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:38:35,358 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668002519] [2022-03-03 19:38:35,358 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668002519] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:38:35,358 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308032025] [2022-03-03 19:38:35,358 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:38:35,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:38:35,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:38:35,359 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) [2022-03-03 19:38:35,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-03 19:38:35,422 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:38:35,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:38:35,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 99 conjunts are in the unsatisfiable core [2022-03-03 19:38:35,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:38:35,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 0 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:35,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:38:36,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 0 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:36,145 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308032025] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:38:36,145 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:38:36,145 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 27 [2022-03-03 19:38:36,145 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213926153] [2022-03-03 19:38:36,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:38:36,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 19:38:36,146 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:38:36,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 19:38:36,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:38:36,146 INFO L87 Difference]: Start difference. First operand 462 states and 962 transitions. Second operand has 27 states, 27 states have (on average 4.074074074074074) internal successors, (110), 27 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:37,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:38:37,208 INFO L93 Difference]: Finished difference Result 1460 states and 2883 transitions. [2022-03-03 19:38:37,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-03 19:38:37,208 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.074074074074074) internal successors, (110), 27 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2022-03-03 19:38:37,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:38:37,209 INFO L225 Difference]: With dead ends: 1460 [2022-03-03 19:38:37,210 INFO L226 Difference]: Without dead ends: 1301 [2022-03-03 19:38:37,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 241 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:38:37,210 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 218 mSDsluCounter, 6104 mSDsCounter, 0 mSdLazyCounter, 3777 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 4458 SdHoareTripleChecker+Invalid, 3778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:38:37,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 4458 Invalid, 3778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3777 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-03 19:38:37,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1301 states. [2022-03-03 19:38:37,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1301 to 985. [2022-03-03 19:38:37,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 984 states have (on average 2.1615853658536586) internal successors, (2127), 984 states have internal predecessors, (2127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:37,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 2127 transitions. [2022-03-03 19:38:37,218 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 2127 transitions. Word has length 110 [2022-03-03 19:38:37,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:38:37,218 INFO L470 AbstractCegarLoop]: Abstraction has 985 states and 2127 transitions. [2022-03-03 19:38:37,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.074074074074074) internal successors, (110), 27 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:37,219 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 2127 transitions. [2022-03-03 19:38:37,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-03-03 19:38:37,220 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:38:37,220 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:38:37,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-03-03 19:38:37,435 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 [2022-03-03 19:38:37,435 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:38:37,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:38:37,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1884370343, now seen corresponding path program 71 times [2022-03-03 19:38:37,435 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:38:37,436 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000809807] [2022-03-03 19:38:37,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:38:37,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:38:37,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:38:38,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 576 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:38,257 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:38:38,258 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000809807] [2022-03-03 19:38:38,258 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000809807] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:38:38,258 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954700785] [2022-03-03 19:38:38,258 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:38:38,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:38:38,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:38:38,259 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) [2022-03-03 19:38:38,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-03 19:38:38,308 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2022-03-03 19:38:38,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:38:38,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 19:38:38,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:38:39,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 576 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:39,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:38:40,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 625 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:40,360 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954700785] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:38:40,360 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:38:40,360 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53, 53] total 130 [2022-03-03 19:38:40,360 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538289851] [2022-03-03 19:38:40,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:38:40,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-03-03 19:38:40,362 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:38:40,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-03-03 19:38:40,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2936, Invalid=14094, Unknown=0, NotChecked=0, Total=17030 [2022-03-03 19:38:40,365 INFO L87 Difference]: Start difference. First operand 985 states and 2127 transitions. Second operand has 131 states, 131 states have (on average 2.068702290076336) internal successors, (271), 130 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:40:00,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:40:00,248 INFO L93 Difference]: Finished difference Result 14809 states and 28304 transitions. [2022-03-03 19:40:00,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1056 states. [2022-03-03 19:40:00,248 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 2.068702290076336) internal successors, (271), 130 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2022-03-03 19:40:00,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:40:00,261 INFO L225 Difference]: With dead ends: 14809 [2022-03-03 19:40:00,261 INFO L226 Difference]: Without dead ends: 10684 [2022-03-03 19:40:00,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1328 GetRequests, 146 SyntacticMatches, 1 SemanticMatches, 1181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707605 ImplicationChecksByTransitivity, 47.1s TimeCoverageRelationStatistics Valid=343874, Invalid=1054432, Unknown=0, NotChecked=0, Total=1398306 [2022-03-03 19:40:00,341 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 2253 mSDsluCounter, 2915 mSDsCounter, 0 mSdLazyCounter, 8227 mSolverCounterSat, 472 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2253 SdHoareTripleChecker+Valid, 1214 SdHoareTripleChecker+Invalid, 8699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 472 IncrementalHoareTripleChecker+Valid, 8227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-03-03 19:40:00,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2253 Valid, 1214 Invalid, 8699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [472 Valid, 8227 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-03-03 19:40:00,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10684 states. [2022-03-03 19:40:00,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10684 to 576. [2022-03-03 19:40:00,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 575 states have (on average 2.071304347826087) internal successors, (1191), 575 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:40:00,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 1191 transitions. [2022-03-03 19:40:00,381 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 1191 transitions. Word has length 112 [2022-03-03 19:40:00,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:40:00,381 INFO L470 AbstractCegarLoop]: Abstraction has 576 states and 1191 transitions. [2022-03-03 19:40:00,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 2.068702290076336) internal successors, (271), 130 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:40:00,382 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 1191 transitions. [2022-03-03 19:40:00,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-03-03 19:40:00,382 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:40:00,382 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:40:00,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-03-03 19:40:00,596 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 [2022-03-03 19:40:00,596 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:40:00,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:40:00,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1100165351, now seen corresponding path program 72 times [2022-03-03 19:40:00,596 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:40:00,596 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89396023] [2022-03-03 19:40:00,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:40:00,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:40:00,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:40:01,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 601 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:01,274 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:40:01,274 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89396023] [2022-03-03 19:40:01,275 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89396023] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:40:01,275 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410409266] [2022-03-03 19:40:01,275 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:40:01,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:40:01,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:40:01,276 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) [2022-03-03 19:40:01,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-03 19:40:01,328 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2022-03-03 19:40:01,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:40:01,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 19:40:01,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:40:02,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 601 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:02,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:40:04,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 625 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:04,410 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410409266] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:40:04,410 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:40:04,410 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 53, 53] total 129 [2022-03-03 19:40:04,410 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892827015] [2022-03-03 19:40:04,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:40:04,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-03-03 19:40:04,410 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:40:04,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-03-03 19:40:04,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3905, Invalid=12865, Unknown=0, NotChecked=0, Total=16770 [2022-03-03 19:40:04,414 INFO L87 Difference]: Start difference. First operand 576 states and 1191 transitions. Second operand has 130 states, 130 states have (on average 2.4153846153846152) internal successors, (314), 129 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) Received shutdown request... [2022-03-03 19:40:39,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 703 states. [2022-03-03 19:40:39,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 974 GetRequests, 146 SyntacticMatches, 1 SemanticMatches, 827 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331450 ImplicationChecksByTransitivity, 24.8s TimeCoverageRelationStatistics Valid=180153, Invalid=506259, Unknown=0, NotChecked=0, Total=686412 [2022-03-03 19:40:39,627 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 1733 mSDsluCounter, 1029 mSDsCounter, 0 mSdLazyCounter, 4537 mSolverCounterSat, 437 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1733 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 4974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 437 IncrementalHoareTripleChecker+Valid, 4537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:40:39,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1733 Valid, 414 Invalid, 4974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [437 Valid, 4537 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-03-03 19:40:39,628 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-03-03 19:40:39,629 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 [2022-03-03 19:40:39,629 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-03 19:40:39,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-03-03 19:40:39,844 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 [2022-03-03 19:40:39,845 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (576states) and FLOYD_HOARE automaton (currently 703 states, 130 states before enhancement),while ReachableStatesComputation was computing reachable states (7400 states constructed, input type IntersectNwa). [2022-03-03 19:40:39,846 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-03-03 19:40:39,846 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-03-03 19:40:39,853 INFO L732 BasicCegarLoop]: Path program histogram: [72, 2, 1] [2022-03-03 19:40:39,855 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-03 19:40:39,855 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-03 19:40:39,858 INFO L202 PluginConnector]: Adding new model figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.03 07:40:39 BasicIcfg [2022-03-03 19:40:39,858 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-03 19:40:39,858 INFO L158 Benchmark]: Toolchain (without parser) took 850267.82ms. Allocated memory was 176.2MB in the beginning and 2.4GB in the end (delta: 2.2GB). Free memory was 136.2MB in the beginning and 1.3GB in the end (delta: -1.2GB). Peak memory consumption was 2.0GB. Max. memory is 8.0GB. [2022-03-03 19:40:39,859 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.14ms. Allocated memory is still 176.2MB. Free memory is still 137.3MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-03 19:40:39,859 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.39ms. Allocated memory is still 176.2MB. Free memory was 136.2MB in the beginning and 134.7MB in the end (delta: 1.5MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2022-03-03 19:40:39,859 INFO L158 Benchmark]: Boogie Preprocessor took 13.77ms. Allocated memory is still 176.2MB. Free memory was 134.7MB in the beginning and 133.7MB in the end (delta: 918.4kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-03 19:40:39,859 INFO L158 Benchmark]: RCFGBuilder took 179.09ms. Allocated memory is still 176.2MB. Free memory was 133.7MB in the beginning and 124.9MB in the end (delta: 8.8MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. [2022-03-03 19:40:39,859 INFO L158 Benchmark]: TraceAbstraction took 850048.36ms. Allocated memory was 176.2MB in the beginning and 2.4GB in the end (delta: 2.2GB). Free memory was 124.3MB in the beginning and 1.3GB in the end (delta: -1.2GB). Peak memory consumption was 2.0GB. Max. memory is 8.0GB. [2022-03-03 19:40:39,871 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 176.2MB. Free memory is still 137.3MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 22.39ms. Allocated memory is still 176.2MB. Free memory was 136.2MB in the beginning and 134.7MB in the end (delta: 1.5MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 13.77ms. Allocated memory is still 176.2MB. Free memory was 134.7MB in the beginning and 133.7MB in the end (delta: 918.4kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 179.09ms. Allocated memory is still 176.2MB. Free memory was 133.7MB in the beginning and 124.9MB in the end (delta: 8.8MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. * TraceAbstraction took 850048.36ms. Allocated memory was 176.2MB in the beginning and 2.4GB in the end (delta: 2.2GB). Free memory was 124.3MB in the beginning and 1.3GB in the end (delta: -1.2GB). Peak memory consumption was 2.0GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 50]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (576states) and FLOYD_HOARE automaton (currently 703 states, 130 states before enhancement),while ReachableStatesComputation was computing reachable states (7400 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 45]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (576states) and FLOYD_HOARE automaton (currently 703 states, 130 states before enhancement),while ReachableStatesComputation was computing reachable states (7400 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 45]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (576states) and FLOYD_HOARE automaton (currently 703 states, 130 states before enhancement),while ReachableStatesComputation was computing reachable states (7400 states constructed, input type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 31 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 850.0s, OverallIterations: 75, TraceHistogramMax: 25, PathProgramHistogramMax: 72, EmptinessCheckTime: 0.1s, AutomataDifference: 740.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 53694 SdHoareTripleChecker+Valid, 65.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 53694 mSDsluCounter, 57776 SdHoareTripleChecker+Invalid, 55.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 94854 mSDsCounter, 12090 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 165655 IncrementalHoareTripleChecker+Invalid, 177745 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 12090 mSolverCounterUnsat, 2873 mSDtfsCounter, 165655 mSolverCounterSat, 0.6s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 28085 GetRequests, 7577 SyntacticMatches, 121 SemanticMatches, 20387 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6130113 ImplicationChecksByTransitivity, 526.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=985occurred in iteration=73, InterpolantAutomatonStates: 16511, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.1s AutomataMinimizationTime, 74 MinimizatonAttempts, 157483 StatesRemovedByMinimization, 74 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.7s SatisfiabilityAnalysisTime, 88.2s InterpolantComputationTime, 9470 NumberOfCodeBlocks, 9470 NumberOfCodeBlocksAsserted, 699 NumberOfCheckSat, 13969 ConstructedInterpolants, 0 QuantifiedInterpolants, 110471 SizeOfPredicates, 367 NumberOfNonLiveVariables, 12189 ConjunctsInSsa, 2717 ConjunctsInUnsatCore, 221 InterpolantComputations, 3 PerfectInterpolantSequences, 31298/91948 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