/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-MCRwithoutDepranks.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/name-comparator-trans.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-44898dd [2022-02-10 09:22:02,599 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-10 09:22:02,601 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-10 09:22:02,672 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-10 09:22:02,680 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-10 09:22:02,681 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-10 09:22:02,681 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-10 09:22:02,682 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-10 09:22:02,682 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-10 09:22:02,683 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-10 09:22:02,684 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-10 09:22:02,685 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-10 09:22:02,686 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-10 09:22:02,689 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-10 09:22:02,690 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-10 09:22:02,690 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-10 09:22:02,692 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-10 09:22:02,703 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-10 09:22:02,703 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-10 09:22:02,704 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-10 09:22:02,705 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-MCRwithoutDepranks.epf [2022-02-10 09:22:02,725 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-10 09:22:02,725 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-10 09:22:02,725 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-10 09:22:02,726 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-10 09:22:02,726 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-10 09:22:02,726 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-10 09:22:02,726 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-10 09:22:02,727 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-10 09:22:02,727 INFO L138 SettingsManager]: * Use SBE=true [2022-02-10 09:22:02,727 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-10 09:22:02,727 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-10 09:22:02,727 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-10 09:22:02,727 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-10 09:22:02,727 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-10 09:22:02,727 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-10 09:22:02,727 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-10 09:22:02,727 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-10 09:22:02,727 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-10 09:22:02,728 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-10 09:22:02,728 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-10 09:22:02,728 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-10 09:22:02,728 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-10 09:22:02,728 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-10 09:22:02,728 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-10 09:22:02,728 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-10 09:22:02,728 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-10 09:22:02,728 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-10 09:22:02,728 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-10 09:22:02,728 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-10 09:22:02,728 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-10 09:22:02,729 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-10 09:22:02,729 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-10 09:22:02,729 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PARTIAL_ORDER_FA [2022-02-10 09:22:02,729 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-10 09:22:02,729 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=MCR_WITHOUT_DEPRANKS [2022-02-10 09:22:02,729 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-10 09:22:02,885 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-10 09:22:02,905 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-10 09:22:02,907 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-10 09:22:02,907 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-10 09:22:02,908 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-10 09:22:02,909 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/name-comparator-trans.wvr.bpl [2022-02-10 09:22:02,910 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/name-comparator-trans.wvr.bpl' [2022-02-10 09:22:02,930 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-10 09:22:02,931 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-10 09:22:02,932 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-10 09:22:02,932 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-10 09:22:02,932 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-10 09:22:02,939 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 09:22:02" (1/1) ... [2022-02-10 09:22:02,944 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 09:22:02" (1/1) ... [2022-02-10 09:22:02,949 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-10 09:22:02,950 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-10 09:22:02,950 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-10 09:22:02,951 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-10 09:22:02,951 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-10 09:22:02,956 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 09:22:02" (1/1) ... [2022-02-10 09:22:02,956 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 09:22:02" (1/1) ... [2022-02-10 09:22:02,957 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 09:22:02" (1/1) ... [2022-02-10 09:22:02,957 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 09:22:02" (1/1) ... [2022-02-10 09:22:02,960 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 09:22:02" (1/1) ... [2022-02-10 09:22:02,961 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 09:22:02" (1/1) ... [2022-02-10 09:22:02,962 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 09:22:02" (1/1) ... [2022-02-10 09:22:02,963 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-10 09:22:02,963 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-10 09:22:02,963 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-10 09:22:02,963 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-10 09:22:02,964 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 09:22:02" (1/1) ... [2022-02-10 09:22:02,969 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-10 09:22:02,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 09:22:02,985 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) [2022-02-10 09:22:02,990 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 [2022-02-10 09:22:03,013 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-02-10 09:22:03,013 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-02-10 09:22:03,013 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-02-10 09:22:03,013 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-02-10 09:22:03,013 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-02-10 09:22:03,013 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-02-10 09:22:03,014 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-10 09:22:03,014 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-10 09:22:03,014 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-10 09:22:03,014 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-02-10 09:22:03,014 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-02-10 09:22:03,015 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-02-10 09:22:03,015 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-02-10 09:22:03,056 INFO L234 CfgBuilder]: Building ICFG [2022-02-10 09:22:03,057 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-10 09:22:03,199 INFO L275 CfgBuilder]: Performing block encoding [2022-02-10 09:22:03,262 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-10 09:22:03,263 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-02-10 09:22:03,282 INFO L202 PluginConnector]: Adding new model name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.02 09:22:03 BoogieIcfgContainer [2022-02-10 09:22:03,282 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-10 09:22:03,283 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-10 09:22:03,283 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-10 09:22:03,296 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-10 09:22:03,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 09:22:02" (1/2) ... [2022-02-10 09:22:03,297 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53f7c8b5 and model type name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.02 09:22:03, skipping insertion in model container [2022-02-10 09:22:03,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.02 09:22:03" (2/2) ... [2022-02-10 09:22:03,300 INFO L111 eAbstractionObserver]: Analyzing ICFG name-comparator-trans.wvr.bpl [2022-02-10 09:22:03,303 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-10 09:22:03,304 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-10 09:22:03,304 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-10 09:22:03,304 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-10 09:22:03,351 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-02-10 09:22:03,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2022-02-10 09:22:03,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 09:22:03,434 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2022-02-10 09:22:03,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (2)] Waiting until timeout for monitored process [2022-02-10 09:22:03,466 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-10 09:22:03,477 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=PARTIAL_ORDER_FA, 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 [2022-02-10 09:22:03,478 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-02-10 09:22:03,484 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 25 transitions, 74 flow [2022-02-10 09:22:03,511 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 108 states, 107 states have (on average 2.878504672897196) internal successors, (308), 107 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 09:22:03,566 INFO L104 alCausalityReduction]: MaximalCausalityReduction evaluated 52 transitions and produced 51 states. [2022-02-10 09:22:03,568 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 09:22:03,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 09:22:03,572 INFO L85 PathProgramCache]: Analyzing trace with hash 943266224, now seen corresponding path program 1 times [2022-02-10 09:22:03,578 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 09:22:03,578 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499128087] [2022-02-10 09:22:03,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 09:22:03,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 09:22:03,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 09:22:03,821 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-10 09:22:03,822 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 09:22:03,822 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499128087] [2022-02-10 09:22:03,822 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499128087] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 09:22:03,822 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691368857] [2022-02-10 09:22:03,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 09:22:03,823 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 09:22:03,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 09:22:03,824 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) [2022-02-10 09:22:03,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-10 09:22:03,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 09:22:03,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-10 09:22:03,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 09:22:04,083 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 09:22:04,083 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-10 09:22:04,083 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691368857] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-10 09:22:04,083 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-10 09:22:04,083 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2022-02-10 09:22:04,086 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630540939] [2022-02-10 09:22:04,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-10 09:22:04,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-10 09:22:04,089 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 09:22:04,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-10 09:22:04,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-02-10 09:22:04,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-02-10 09:22:04,122 INFO L470 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-02-10 09:22:04,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 09:22:04,122 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states.