/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/parallel/ticket-7.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-44898dd [2022-02-15 13:47:44,666 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-15 13:47:44,669 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-15 13:47:44,739 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-15 13:47:44,781 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-15 13:47:44,782 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-15 13:47:44,782 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-15 13:47:44,785 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 [2022-02-15 13:47:44,804 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-15 13:47:44,804 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-15 13:47:44,805 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-15 13:47:44,805 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-15 13:47:44,805 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-15 13:47:44,805 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-15 13:47:44,806 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-15 13:47:44,806 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-15 13:47:44,806 INFO L138 SettingsManager]: * Use SBE=true [2022-02-15 13:47:44,806 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-15 13:47:44,806 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-15 13:47:44,807 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-15 13:47:44,807 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-15 13:47:44,807 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-15 13:47:44,807 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-15 13:47:44,807 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-15 13:47:44,807 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-15 13:47:44,807 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-15 13:47:44,807 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-15 13:47:44,808 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-15 13:47:44,808 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-15 13:47:44,808 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-15 13:47:44,808 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-15 13:47:44,808 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-15 13:47:44,808 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-15 13:47:44,808 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 13:47:44,808 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-15 13:47:44,809 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-15 13:47:44,809 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-15 13:47:44,809 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-15 13:47:44,809 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-15 13:47:44,809 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-15 13:47:44,809 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-15 13:47:44,809 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-15 13:47:45,053 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-15 13:47:45,070 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-15 13:47:45,073 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-15 13:47:45,074 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-15 13:47:45,075 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-15 13:47:45,076 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/ticket-7.wvr.bpl [2022-02-15 13:47:45,076 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/ticket-7.wvr.bpl' [2022-02-15 13:47:45,101 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-15 13:47:45,102 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-15 13:47:45,104 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-15 13:47:45,104 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-15 13:47:45,104 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-15 13:47:45,117 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "ticket-7.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:47:45" (1/1) ... [2022-02-15 13:47:45,124 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "ticket-7.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:47:45" (1/1) ... [2022-02-15 13:47:45,130 INFO L137 Inliner]: procedures = 8, calls = 7, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-15 13:47:45,132 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-15 13:47:45,133 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-15 13:47:45,133 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-15 13:47:45,133 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-15 13:47:45,139 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ticket-7.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:47:45" (1/1) ... [2022-02-15 13:47:45,139 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ticket-7.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:47:45" (1/1) ... [2022-02-15 13:47:45,140 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ticket-7.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:47:45" (1/1) ... [2022-02-15 13:47:45,140 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ticket-7.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:47:45" (1/1) ... [2022-02-15 13:47:45,145 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ticket-7.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:47:45" (1/1) ... [2022-02-15 13:47:45,146 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ticket-7.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:47:45" (1/1) ... [2022-02-15 13:47:45,147 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ticket-7.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:47:45" (1/1) ... [2022-02-15 13:47:45,148 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-15 13:47:45,149 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-15 13:47:45,149 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-15 13:47:45,149 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-15 13:47:45,151 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ticket-7.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:47:45" (1/1) ... [2022-02-15 13:47:45,158 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 13:47:45,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:47:45,181 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) [2022-02-15 13:47:45,201 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 [2022-02-15 13:47:45,219 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-02-15 13:47:45,219 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-02-15 13:47:45,219 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-02-15 13:47:45,219 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-02-15 13:47:45,219 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-02-15 13:47:45,219 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-02-15 13:47:45,219 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-15 13:47:45,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-15 13:47:45,220 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-15 13:47:45,220 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-02-15 13:47:45,221 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-02-15 13:47:45,221 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-02-15 13:47:45,222 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2022-02-15 13:47:45,222 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-02-15 13:47:45,222 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-02-15 13:47:45,222 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread5 given in one single declaration [2022-02-15 13:47:45,223 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2022-02-15 13:47:45,223 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2022-02-15 13:47:45,225 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread6 given in one single declaration [2022-02-15 13:47:45,226 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2022-02-15 13:47:45,226 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2022-02-15 13:47:45,226 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread7 given in one single declaration [2022-02-15 13:47:45,226 INFO L130 BoogieDeclarations]: Found specification of procedure thread7 [2022-02-15 13:47:45,226 INFO L138 BoogieDeclarations]: Found implementation of procedure thread7 [2022-02-15 13:47:45,227 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-02-15 13:47:45,271 INFO L234 CfgBuilder]: Building ICFG [2022-02-15 13:47:45,273 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-15 13:47:45,457 INFO L275 CfgBuilder]: Performing block encoding [2022-02-15 13:47:45,477 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-15 13:47:45,478 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-02-15 13:47:45,480 INFO L202 PluginConnector]: Adding new model ticket-7.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:47:45 BoogieIcfgContainer [2022-02-15 13:47:45,480 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-15 13:47:45,483 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-15 13:47:45,483 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-15 13:47:45,486 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-15 13:47:45,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ticket-7.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:47:45" (1/2) ... [2022-02-15 13:47:45,487 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ac74908 and model type ticket-7.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:47:45, skipping insertion in model container [2022-02-15 13:47:45,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ticket-7.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:47:45" (2/2) ... [2022-02-15 13:47:45,489 INFO L111 eAbstractionObserver]: Analyzing ICFG ticket-7.wvr.bpl [2022-02-15 13:47:45,494 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-15 13:47:45,494 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-15 13:47:45,494 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-15 13:47:45,494 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-15 13:47:45,550 INFO L148 ThreadInstanceAdder]: Constructed 7 joinOtherThreadTransitions. [2022-02-15 13:47:45,632 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-15 13:47:45,638 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 [2022-02-15 13:47:45,638 INFO L340 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-02-15 13:47:45,660 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 84 places, 62 transitions, 180 flow [2022-02-15 13:48:03,902 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 447900 states, 447899 states have (on average 5.854154619679883) internal successors, (2622070), 447899 states have internal predecessors, (2622070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:48:07,044 INFO L276 IsEmpty]: Start isEmpty. Operand has 447900 states, 447899 states have (on average 5.854154619679883) internal successors, (2622070), 447899 states have internal predecessors, (2622070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:48:10,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-02-15 13:48:10,710 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:48:10,711 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:48:10,711 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2022-02-15 13:48:10,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:48:10,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1985205125, now seen corresponding path program 1 times [2022-02-15 13:48:10,724 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:48:10,725 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997186877] [2022-02-15 13:48:10,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:48:10,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:48:10,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:48:10,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:48:10,961 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:48:10,961 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997186877] [2022-02-15 13:48:10,961 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997186877] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 13:48:10,962 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 13:48:10,962 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-15 13:48:10,963 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433616359] [2022-02-15 13:48:10,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 13:48:10,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 13:48:10,968 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:48:11,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 13:48:11,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-02-15 13:48:12,516 INFO L87 Difference]: Start difference. First operand has 447900 states, 447899 states have (on average 5.854154619679883) internal successors, (2622070), 447899 states have internal predecessors, (2622070), 0 states have call successors, (0), 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 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)