/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/bench/exp3x3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 12:12:18,298 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 12:12:18,300 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 12:12:18,330 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-21 12:12:18,353 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-21 12:12:18,354 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-21 12:12:18,356 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-21 12:12:18,358 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-21 12:12:18,359 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-21 12:12:18,359 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-21 12:12:18,361 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-21 12:12:18,367 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-21 12:12:18,368 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-21 12:12:18,377 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-21 12:12:18,378 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-21 12:12:18,379 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-21 12:12:18,382 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-08-21 12:12:18,384 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-21 12:12:18,385 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-21 12:12:18,385 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-21 12:12:18,385 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-21 12:12:18,386 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-21 12:12:18,386 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-21 12:12:18,387 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-21 12:12:18,387 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-21 12:12:18,387 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-21 12:12:18,387 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-21 12:12:18,388 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-21 12:12:18,391 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 [2021-08-21 12:12:18,409 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 12:12:18,409 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 12:12:18,409 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-21 12:12:18,409 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-21 12:12:18,410 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 12:12:18,410 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 12:12:18,410 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 12:12:18,410 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 12:12:18,410 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 12:12:18,410 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 12:12:18,411 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 12:12:18,411 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 12:12:18,411 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 12:12:18,411 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 12:12:18,411 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 12:12:18,411 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 12:12:18,411 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 12:12:18,411 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 12:12:18,411 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 12:12:18,411 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 12:12:18,412 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 12:12:18,412 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 12:12:18,412 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 12:12:18,412 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 12:12:18,412 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 12:12:18,412 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 12:12:18,412 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 12:12:18,412 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 12:12:18,412 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 12:12:18,412 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 12:12:18,413 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 12:12:18,413 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 12:12:18,654 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 12:12:18,673 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 12:12:18,675 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 12:12:18,676 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 12:12:18,677 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 12:12:18,678 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp3x3.wvr.bpl [2021-08-21 12:12:18,678 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp3x3.wvr.bpl' [2021-08-21 12:12:18,710 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 12:12:18,711 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 12:12:18,714 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 12:12:18,714 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 12:12:18,714 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 12:12:18,722 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:12:18" (1/1) ... [2021-08-21 12:12:18,728 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:12:18" (1/1) ... [2021-08-21 12:12:18,734 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 12:12:18,735 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 12:12:18,735 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 12:12:18,736 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 12:12:18,741 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:12:18" (1/1) ... [2021-08-21 12:12:18,741 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:12:18" (1/1) ... [2021-08-21 12:12:18,742 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:12:18" (1/1) ... [2021-08-21 12:12:18,742 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:12:18" (1/1) ... [2021-08-21 12:12:18,746 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:12:18" (1/1) ... [2021-08-21 12:12:18,748 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:12:18" (1/1) ... [2021-08-21 12:12:18,749 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:12:18" (1/1) ... [2021-08-21 12:12:18,749 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 12:12:18,750 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 12:12:18,750 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 12:12:18,750 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 12:12:18,751 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:12:18" (1/1) ... [2021-08-21 12:12:18,755 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 12:12:18,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:12:18,770 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) [2021-08-21 12:12:18,772 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 [2021-08-21 12:12:18,795 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 12:12:18,795 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 12:12:18,795 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 12:12:18,796 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 12:12:18,796 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 12:12:18,796 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 12:12:18,796 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 12:12:18,796 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 12:12:18,796 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 12:12:18,796 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-21 12:12:18,796 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-21 12:12:18,796 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-21 12:12:18,796 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-08-21 12:12:18,796 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-08-21 12:12:18,797 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-08-21 12:12:18,797 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread5 given in one single declaration [2021-08-21 12:12:18,797 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2021-08-21 12:12:18,797 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2021-08-21 12:12:18,797 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread6 given in one single declaration [2021-08-21 12:12:18,797 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2021-08-21 12:12:18,797 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2021-08-21 12:12:18,798 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-21 12:12:18,942 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 12:12:18,942 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-21 12:12:18,943 INFO L202 PluginConnector]: Adding new model exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 12:12:18 BoogieIcfgContainer [2021-08-21 12:12:18,944 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 12:12:18,945 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 12:12:18,945 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 12:12:18,947 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 12:12:18,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:12:18" (1/2) ... [2021-08-21 12:12:18,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73199fea and model type exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 12:12:18, skipping insertion in model container [2021-08-21 12:12:18,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 12:12:18" (2/2) ... [2021-08-21 12:12:18,948 INFO L111 eAbstractionObserver]: Analyzing ICFG exp3x3.wvr.bpl [2021-08-21 12:12:18,951 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 12:12:18,951 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 12:12:18,951 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 12:12:18,952 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 12:12:18,999 INFO L148 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2021-08-21 12:12:19,027 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 12:12:19,039 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, mConcurrency=FINITE_AUTOMATA, 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 [2021-08-21 12:12:19,039 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-08-21 12:12:19,047 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 60 places, 47 transitions, 142 flow [2021-08-21 12:12:19,345 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 6829 states, 6828 states have (on average 5.865992970123023) internal successors, (40053), 6828 states have internal predecessors, (40053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:19,385 INFO L276 IsEmpty]: Start isEmpty. Operand has 6829 states, 6828 states have (on average 5.865992970123023) internal successors, (40053), 6828 states have internal predecessors, (40053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:19,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 12:12:19,437 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:19,438 INFO L512 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] [2021-08-21 12:12:19,439 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 12:12:19,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:19,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1106088347, now seen corresponding path program 1 times [2021-08-21 12:12:19,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:19,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707440477] [2021-08-21 12:12:19,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:19,455 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:19,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:19,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:12:19,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:19,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707440477] [2021-08-21 12:12:19,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707440477] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:12:19,633 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:12:19,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 12:12:19,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779027436] [2021-08-21 12:12:19,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 12:12:19,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:19,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 12:12:19,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 12:12:19,703 INFO L87 Difference]: Start difference. First operand has 6829 states, 6828 states have (on average 5.865992970123023) internal successors, (40053), 6828 states have internal predecessors, (40053), 0 states have call successors, (0), 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 9.0) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:20,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:20,010 INFO L93 Difference]: Finished difference Result 13654 states and 80102 transitions. [2021-08-21 12:12:20,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 12:12:20,013 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-21 12:12:20,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:20,247 INFO L225 Difference]: With dead ends: 13654 [2021-08-21 12:12:20,248 INFO L226 Difference]: Without dead ends: 13527 [2021-08-21 12:12:20,250 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 12:12:20,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13527 states. [2021-08-21 12:12:20,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13527 to 8158. [2021-08-21 12:12:20,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8158 states, 8157 states have (on average 5.851538555841609) internal successors, (47731), 8157 states have internal predecessors, (47731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:20,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8158 states to 8158 states and 47731 transitions. [2021-08-21 12:12:20,865 INFO L78 Accepts]: Start accepts. Automaton has 8158 states and 47731 transitions. Word has length 27 [2021-08-21 12:12:20,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:20,866 INFO L470 AbstractCegarLoop]: Abstraction has 8158 states and 47731 transitions. [2021-08-21 12:12:20,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:20,867 INFO L276 IsEmpty]: Start isEmpty. Operand 8158 states and 47731 transitions. [2021-08-21 12:12:20,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:12:20,897 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:20,897 INFO L512 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] [2021-08-21 12:12:20,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 12:12:20,898 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 12:12:20,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:20,901 INFO L82 PathProgramCache]: Analyzing trace with hash -764437085, now seen corresponding path program 1 times [2021-08-21 12:12:20,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:20,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210706487] [2021-08-21 12:12:20,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:20,901 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:20,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:20,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:12:20,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:20,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210706487] [2021-08-21 12:12:20,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210706487] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:20,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885720733] [2021-08-21 12:12:20,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:20,966 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:20,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:12:20,968 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) [2021-08-21 12:12:20,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-21 12:12:21,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:21,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-21 12:12:21,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:12:21,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:12:21,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885720733] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:21,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:12:21,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-08-21 12:12:21,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360450871] [2021-08-21 12:12:21,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 12:12:21,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:21,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 12:12:21,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:12:21,261 INFO L87 Difference]: Start difference. First operand 8158 states and 47731 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:21,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:21,802 INFO L93 Difference]: Finished difference Result 21114 states and 121111 transitions. [2021-08-21 12:12:21,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 12:12:21,803 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:12:21,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:21,954 INFO L225 Difference]: With dead ends: 21114 [2021-08-21 12:12:21,954 INFO L226 Difference]: Without dead ends: 21114 [2021-08-21 12:12:21,955 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 25.1ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:12:22,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21114 states. [2021-08-21 12:12:22,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21114 to 10411. [2021-08-21 12:12:22,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10411 states, 10410 states have (on average 5.94447646493756) internal successors, (61882), 10410 states have internal predecessors, (61882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:22,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10411 states to 10411 states and 61882 transitions. [2021-08-21 12:12:22,685 INFO L78 Accepts]: Start accepts. Automaton has 10411 states and 61882 transitions. Word has length 29 [2021-08-21 12:12:22,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:22,685 INFO L470 AbstractCegarLoop]: Abstraction has 10411 states and 61882 transitions. [2021-08-21 12:12:22,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:22,685 INFO L276 IsEmpty]: Start isEmpty. Operand 10411 states and 61882 transitions. [2021-08-21 12:12:22,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:12:22,722 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:22,722 INFO L512 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] [2021-08-21 12:12:22,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-21 12:12:22,939 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 [2021-08-21 12:12:22,939 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 12:12:22,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:22,940 INFO L82 PathProgramCache]: Analyzing trace with hash -327915353, now seen corresponding path program 1 times [2021-08-21 12:12:22,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:22,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702822103] [2021-08-21 12:12:22,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:22,940 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:22,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:22,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:12:22,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:22,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702822103] [2021-08-21 12:12:22,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702822103] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:12:22,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:12:22,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 12:12:22,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077883142] [2021-08-21 12:12:22,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 12:12:22,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:22,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 12:12:22,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:12:22,987 INFO L87 Difference]: Start difference. First operand 10411 states and 61882 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:23,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:23,468 INFO L93 Difference]: Finished difference Result 14973 states and 85568 transitions. [2021-08-21 12:12:23,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 12:12:23,468 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:12:23,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:23,610 INFO L225 Difference]: With dead ends: 14973 [2021-08-21 12:12:23,610 INFO L226 Difference]: Without dead ends: 14893 [2021-08-21 12:12:23,610 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:12:23,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14893 states. [2021-08-21 12:12:24,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14893 to 11995. [2021-08-21 12:12:24,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11995 states, 11994 states have (on average 5.837335334333834) internal successors, (70013), 11994 states have internal predecessors, (70013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:24,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11995 states to 11995 states and 70013 transitions. [2021-08-21 12:12:24,132 INFO L78 Accepts]: Start accepts. Automaton has 11995 states and 70013 transitions. Word has length 29 [2021-08-21 12:12:24,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:24,132 INFO L470 AbstractCegarLoop]: Abstraction has 11995 states and 70013 transitions. [2021-08-21 12:12:24,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:24,132 INFO L276 IsEmpty]: Start isEmpty. Operand 11995 states and 70013 transitions. [2021-08-21 12:12:24,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:12:24,176 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:24,176 INFO L512 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] [2021-08-21 12:12:24,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-21 12:12:24,177 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 12:12:24,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:24,177 INFO L82 PathProgramCache]: Analyzing trace with hash 936602023, now seen corresponding path program 1 times [2021-08-21 12:12:24,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:24,178 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077924654] [2021-08-21 12:12:24,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:24,178 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:24,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:24,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:12:24,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:24,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077924654] [2021-08-21 12:12:24,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077924654] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:24,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508701949] [2021-08-21 12:12:24,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:24,247 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:24,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:12:24,249 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) [2021-08-21 12:12:24,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-21 12:12:24,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:24,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-21 12:12:24,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:12:24,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:12:24,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508701949] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:24,563 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:12:24,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-08-21 12:12:24,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104667909] [2021-08-21 12:12:24,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 12:12:24,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:24,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 12:12:24,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:12:24,565 INFO L87 Difference]: Start difference. First operand 11995 states and 70013 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:25,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:25,043 INFO L93 Difference]: Finished difference Result 31953 states and 183348 transitions. [2021-08-21 12:12:25,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 12:12:25,044 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:12:25,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:25,246 INFO L225 Difference]: With dead ends: 31953 [2021-08-21 12:12:25,246 INFO L226 Difference]: Without dead ends: 31953 [2021-08-21 12:12:25,246 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 42.0ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:12:25,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31953 states. [2021-08-21 12:12:26,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31953 to 15889. [2021-08-21 12:12:26,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15889 states, 15888 states have (on average 5.952353977844915) internal successors, (94571), 15888 states have internal predecessors, (94571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:26,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15889 states to 15889 states and 94571 transitions. [2021-08-21 12:12:26,232 INFO L78 Accepts]: Start accepts. Automaton has 15889 states and 94571 transitions. Word has length 29 [2021-08-21 12:12:26,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:26,232 INFO L470 AbstractCegarLoop]: Abstraction has 15889 states and 94571 transitions. [2021-08-21 12:12:26,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:26,233 INFO L276 IsEmpty]: Start isEmpty. Operand 15889 states and 94571 transitions. [2021-08-21 12:12:26,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:12:26,314 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:26,314 INFO L512 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] [2021-08-21 12:12:26,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-21 12:12:26,530 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 [2021-08-21 12:12:26,530 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 12:12:26,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:26,531 INFO L82 PathProgramCache]: Analyzing trace with hash 794550245, now seen corresponding path program 1 times [2021-08-21 12:12:26,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:26,531 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146833524] [2021-08-21 12:12:26,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:26,531 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:26,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:26,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:12:26,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:26,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146833524] [2021-08-21 12:12:26,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146833524] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:26,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700683741] [2021-08-21 12:12:26,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:26,564 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:26,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:12:26,565 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) [2021-08-21 12:12:26,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-21 12:12:26,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:26,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-21 12:12:26,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:12:26,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:12:26,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700683741] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:26,723 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:12:26,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-08-21 12:12:26,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455397058] [2021-08-21 12:12:26,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 12:12:26,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:26,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 12:12:26,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:12:26,725 INFO L87 Difference]: Start difference. First operand 15889 states and 94571 transitions. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:27,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:27,439 INFO L93 Difference]: Finished difference Result 40052 states and 235429 transitions. [2021-08-21 12:12:27,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 12:12:27,440 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:12:27,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:27,750 INFO L225 Difference]: With dead ends: 40052 [2021-08-21 12:12:27,750 INFO L226 Difference]: Without dead ends: 40052 [2021-08-21 12:12:27,750 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 19.0ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:12:27,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40052 states. [2021-08-21 12:12:28,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40052 to 21804. [2021-08-21 12:12:28,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21804 states, 21803 states have (on average 6.063110581112691) internal successors, (132194), 21803 states have internal predecessors, (132194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:28,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21804 states to 21804 states and 132194 transitions. [2021-08-21 12:12:28,927 INFO L78 Accepts]: Start accepts. Automaton has 21804 states and 132194 transitions. Word has length 29 [2021-08-21 12:12:28,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:28,928 INFO L470 AbstractCegarLoop]: Abstraction has 21804 states and 132194 transitions. [2021-08-21 12:12:28,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:28,928 INFO L276 IsEmpty]: Start isEmpty. Operand 21804 states and 132194 transitions. [2021-08-21 12:12:29,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:12:29,003 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:29,003 INFO L512 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] [2021-08-21 12:12:29,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-21 12:12:29,204 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 [2021-08-21 12:12:29,205 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 12:12:29,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:29,205 INFO L82 PathProgramCache]: Analyzing trace with hash -715559483, now seen corresponding path program 1 times [2021-08-21 12:12:29,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:29,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846034362] [2021-08-21 12:12:29,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:29,206 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:29,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:29,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:12:29,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:29,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846034362] [2021-08-21 12:12:29,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846034362] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:12:29,257 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:12:29,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 12:12:29,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331916040] [2021-08-21 12:12:29,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 12:12:29,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:29,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 12:12:29,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:12:29,420 INFO L87 Difference]: Start difference. First operand 21804 states and 132194 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:29,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:29,774 INFO L93 Difference]: Finished difference Result 29811 states and 175284 transitions. [2021-08-21 12:12:29,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 12:12:29,775 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:12:29,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:30,162 INFO L225 Difference]: With dead ends: 29811 [2021-08-21 12:12:30,163 INFO L226 Difference]: Without dead ends: 29542 [2021-08-21 12:12:30,172 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:12:30,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29542 states. [2021-08-21 12:12:30,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29542 to 24475. [2021-08-21 12:12:31,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24475 states, 24474 states have (on average 5.988845305221868) internal successors, (146571), 24474 states have internal predecessors, (146571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:31,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24475 states to 24475 states and 146571 transitions. [2021-08-21 12:12:31,161 INFO L78 Accepts]: Start accepts. Automaton has 24475 states and 146571 transitions. Word has length 29 [2021-08-21 12:12:31,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:31,161 INFO L470 AbstractCegarLoop]: Abstraction has 24475 states and 146571 transitions. [2021-08-21 12:12:31,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:31,161 INFO L276 IsEmpty]: Start isEmpty. Operand 24475 states and 146571 transitions. [2021-08-21 12:12:31,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:12:31,242 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:31,242 INFO L512 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] [2021-08-21 12:12:31,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-21 12:12:31,242 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 12:12:31,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:31,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1770833255, now seen corresponding path program 1 times [2021-08-21 12:12:31,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:31,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294915364] [2021-08-21 12:12:31,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:31,243 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:31,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:31,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:12:31,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:31,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294915364] [2021-08-21 12:12:31,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294915364] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:12:31,487 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:12:31,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 12:12:31,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201957693] [2021-08-21 12:12:31,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 12:12:31,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:31,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 12:12:31,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:12:31,488 INFO L87 Difference]: Start difference. First operand 24475 states and 146571 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:31,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:31,846 INFO L93 Difference]: Finished difference Result 35114 states and 202380 transitions. [2021-08-21 12:12:31,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 12:12:31,846 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:12:31,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:32,266 INFO L225 Difference]: With dead ends: 35114 [2021-08-21 12:12:32,266 INFO L226 Difference]: Without dead ends: 34658 [2021-08-21 12:12:32,266 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:12:32,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34658 states. [2021-08-21 12:12:33,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34658 to 28375. [2021-08-21 12:12:33,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28375 states, 28374 states have (on average 5.901212377528723) internal successors, (167441), 28374 states have internal predecessors, (167441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:33,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28375 states to 28375 states and 167441 transitions. [2021-08-21 12:12:33,417 INFO L78 Accepts]: Start accepts. Automaton has 28375 states and 167441 transitions. Word has length 29 [2021-08-21 12:12:33,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:33,418 INFO L470 AbstractCegarLoop]: Abstraction has 28375 states and 167441 transitions. [2021-08-21 12:12:33,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:33,419 INFO L276 IsEmpty]: Start isEmpty. Operand 28375 states and 167441 transitions. [2021-08-21 12:12:33,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:12:33,570 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:33,570 INFO L512 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] [2021-08-21 12:12:33,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-21 12:12:33,570 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 12:12:33,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:33,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1398612613, now seen corresponding path program 2 times [2021-08-21 12:12:33,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:33,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403964438] [2021-08-21 12:12:33,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:33,571 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:33,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:33,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:12:33,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:33,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403964438] [2021-08-21 12:12:33,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403964438] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:12:33,613 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:12:33,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 12:12:33,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585056439] [2021-08-21 12:12:33,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:12:33,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:33,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:12:33,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:12:33,614 INFO L87 Difference]: Start difference. First operand 28375 states and 167441 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:34,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:34,289 INFO L93 Difference]: Finished difference Result 37576 states and 218897 transitions. [2021-08-21 12:12:34,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:12:34,289 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:12:34,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:34,519 INFO L225 Difference]: With dead ends: 37576 [2021-08-21 12:12:34,519 INFO L226 Difference]: Without dead ends: 37576 [2021-08-21 12:12:34,520 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 9.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:12:34,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37576 states. [2021-08-21 12:12:35,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37576 to 30967. [2021-08-21 12:12:35,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30967 states, 30966 states have (on average 5.905703029128722) internal successors, (182876), 30966 states have internal predecessors, (182876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:35,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30967 states to 30967 states and 182876 transitions. [2021-08-21 12:12:35,897 INFO L78 Accepts]: Start accepts. Automaton has 30967 states and 182876 transitions. Word has length 29 [2021-08-21 12:12:35,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:35,897 INFO L470 AbstractCegarLoop]: Abstraction has 30967 states and 182876 transitions. [2021-08-21 12:12:35,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:35,897 INFO L276 IsEmpty]: Start isEmpty. Operand 30967 states and 182876 transitions. [2021-08-21 12:12:35,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:12:35,997 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:35,997 INFO L512 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] [2021-08-21 12:12:35,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-21 12:12:35,997 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 12:12:35,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:35,998 INFO L82 PathProgramCache]: Analyzing trace with hash -627904633, now seen corresponding path program 2 times [2021-08-21 12:12:35,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:35,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851693458] [2021-08-21 12:12:35,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:35,998 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:36,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:36,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:12:36,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:36,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851693458] [2021-08-21 12:12:36,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851693458] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:12:36,029 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:12:36,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 12:12:36,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472331533] [2021-08-21 12:12:36,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:12:36,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:36,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:12:36,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:12:36,030 INFO L87 Difference]: Start difference. First operand 30967 states and 182876 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:36,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:36,693 INFO L93 Difference]: Finished difference Result 42542 states and 247007 transitions. [2021-08-21 12:12:36,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:12:36,693 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:12:36,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:36,955 INFO L225 Difference]: With dead ends: 42542 [2021-08-21 12:12:36,955 INFO L226 Difference]: Without dead ends: 42542 [2021-08-21 12:12:36,956 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 8.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:12:37,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42542 states. [2021-08-21 12:12:38,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42542 to 34465. [2021-08-21 12:12:38,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34465 states, 34464 states have (on average 5.9103122098421546) internal successors, (203693), 34464 states have internal predecessors, (203693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:38,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34465 states to 34465 states and 203693 transitions. [2021-08-21 12:12:38,413 INFO L78 Accepts]: Start accepts. Automaton has 34465 states and 203693 transitions. Word has length 29 [2021-08-21 12:12:38,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:38,414 INFO L470 AbstractCegarLoop]: Abstraction has 34465 states and 203693 transitions. [2021-08-21 12:12:38,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:38,414 INFO L276 IsEmpty]: Start isEmpty. Operand 34465 states and 203693 transitions. [2021-08-21 12:12:38,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:12:38,801 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:38,801 INFO L512 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] [2021-08-21 12:12:38,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-21 12:12:38,801 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 12:12:38,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:38,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1413996949, now seen corresponding path program 2 times [2021-08-21 12:12:38,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:38,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479988655] [2021-08-21 12:12:38,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:38,802 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:38,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:38,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:12:38,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:38,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479988655] [2021-08-21 12:12:38,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479988655] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:12:38,834 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:12:38,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 12:12:38,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866220069] [2021-08-21 12:12:38,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:12:38,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:38,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:12:38,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:12:38,835 INFO L87 Difference]: Start difference. First operand 34465 states and 203693 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:39,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:39,574 INFO L93 Difference]: Finished difference Result 47735 states and 276681 transitions. [2021-08-21 12:12:39,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:12:39,575 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:12:39,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:39,876 INFO L225 Difference]: With dead ends: 47735 [2021-08-21 12:12:39,876 INFO L226 Difference]: Without dead ends: 47735 [2021-08-21 12:12:39,877 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 8.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:12:39,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47735 states. [2021-08-21 12:12:41,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47735 to 37708. [2021-08-21 12:12:41,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37708 states, 37707 states have (on average 5.9143660328321) internal successors, (223013), 37707 states have internal predecessors, (223013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:41,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37708 states to 37708 states and 223013 transitions. [2021-08-21 12:12:41,558 INFO L78 Accepts]: Start accepts. Automaton has 37708 states and 223013 transitions. Word has length 29 [2021-08-21 12:12:41,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:41,558 INFO L470 AbstractCegarLoop]: Abstraction has 37708 states and 223013 transitions. [2021-08-21 12:12:41,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:41,558 INFO L276 IsEmpty]: Start isEmpty. Operand 37708 states and 223013 transitions. [2021-08-21 12:12:41,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:12:41,683 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:41,683 INFO L512 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] [2021-08-21 12:12:41,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-21 12:12:41,684 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 12:12:41,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:41,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1581432933, now seen corresponding path program 1 times [2021-08-21 12:12:41,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:41,684 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353157943] [2021-08-21 12:12:41,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:41,684 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:41,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:41,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:12:41,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:41,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353157943] [2021-08-21 12:12:41,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353157943] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:41,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625166396] [2021-08-21 12:12:41,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:41,764 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:41,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:12:41,766 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) [2021-08-21 12:12:41,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-21 12:12:41,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:41,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 12:12:41,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:12:42,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:12:42,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625166396] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:42,649 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:12:42,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 4 [2021-08-21 12:12:42,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869606106] [2021-08-21 12:12:42,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:12:42,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:42,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:12:42,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:12:42,650 INFO L87 Difference]: Start difference. First operand 37708 states and 223013 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 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) [2021-08-21 12:12:43,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:43,316 INFO L93 Difference]: Finished difference Result 48610 states and 280421 transitions. [2021-08-21 12:12:43,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:12:43,316 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 12:12:43,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:43,598 INFO L225 Difference]: With dead ends: 48610 [2021-08-21 12:12:43,598 INFO L226 Difference]: Without dead ends: 48062 [2021-08-21 12:12:43,599 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.9ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:12:43,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48062 states. [2021-08-21 12:12:44,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48062 to 40315. [2021-08-21 12:12:44,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40315 states, 40314 states have (on average 5.896785235898199) internal successors, (237723), 40314 states have internal predecessors, (237723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:45,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40315 states to 40315 states and 237723 transitions. [2021-08-21 12:12:45,167 INFO L78 Accepts]: Start accepts. Automaton has 40315 states and 237723 transitions. Word has length 31 [2021-08-21 12:12:45,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:45,168 INFO L470 AbstractCegarLoop]: Abstraction has 40315 states and 237723 transitions. [2021-08-21 12:12:45,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 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) [2021-08-21 12:12:45,168 INFO L276 IsEmpty]: Start isEmpty. Operand 40315 states and 237723 transitions. [2021-08-21 12:12:45,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:12:45,692 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:45,692 INFO L512 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] [2021-08-21 12:12:45,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-21 12:12:45,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:45,893 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 12:12:45,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:45,893 INFO L82 PathProgramCache]: Analyzing trace with hash -6737385, now seen corresponding path program 2 times [2021-08-21 12:12:45,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:45,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633208276] [2021-08-21 12:12:45,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:45,894 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:45,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:45,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:12:45,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:45,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633208276] [2021-08-21 12:12:45,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633208276] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:12:45,980 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:12:45,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 12:12:45,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203298410] [2021-08-21 12:12:45,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 12:12:45,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:45,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 12:12:45,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:12:45,983 INFO L87 Difference]: Start difference. First operand 40315 states and 237723 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:46,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:46,894 INFO L93 Difference]: Finished difference Result 50404 states and 290958 transitions. [2021-08-21 12:12:46,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 12:12:46,895 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 12:12:46,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:47,305 INFO L225 Difference]: With dead ends: 50404 [2021-08-21 12:12:47,306 INFO L226 Difference]: Without dead ends: 49856 [2021-08-21 12:12:47,306 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:12:47,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49856 states. [2021-08-21 12:12:48,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49856 to 42372. [2021-08-21 12:12:48,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42372 states, 42371 states have (on average 5.882112765806802) internal successors, (249231), 42371 states have internal predecessors, (249231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:48,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42372 states to 42372 states and 249231 transitions. [2021-08-21 12:12:48,960 INFO L78 Accepts]: Start accepts. Automaton has 42372 states and 249231 transitions. Word has length 31 [2021-08-21 12:12:48,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:48,961 INFO L470 AbstractCegarLoop]: Abstraction has 42372 states and 249231 transitions. [2021-08-21 12:12:48,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:48,961 INFO L276 IsEmpty]: Start isEmpty. Operand 42372 states and 249231 transitions. [2021-08-21 12:12:49,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:12:49,388 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:49,388 INFO L512 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] [2021-08-21 12:12:49,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-08-21 12:12:49,388 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 12:12:49,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:49,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1996224553, now seen corresponding path program 1 times [2021-08-21 12:12:49,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:49,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832863957] [2021-08-21 12:12:49,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:49,389 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:49,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:49,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:12:49,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:49,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832863957] [2021-08-21 12:12:49,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832863957] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:49,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392146662] [2021-08-21 12:12:49,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:49,439 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:49,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:12:49,440 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) [2021-08-21 12:12:49,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-21 12:12:49,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:49,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 12:12:49,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:12:49,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:12:49,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392146662] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:49,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:12:49,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 4 [2021-08-21 12:12:49,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160366147] [2021-08-21 12:12:49,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:12:49,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:49,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:12:49,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:12:49,986 INFO L87 Difference]: Start difference. First operand 42372 states and 249231 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:50,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:50,765 INFO L93 Difference]: Finished difference Result 53113 states and 305911 transitions. [2021-08-21 12:12:50,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:12:50,765 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 12:12:50,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:51,050 INFO L225 Difference]: With dead ends: 53113 [2021-08-21 12:12:51,051 INFO L226 Difference]: Without dead ends: 52637 [2021-08-21 12:12:51,051 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.7ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:12:51,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52637 states. [2021-08-21 12:12:52,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52637 to 45439. [2021-08-21 12:12:52,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45439 states, 45438 states have (on average 5.865487037281571) internal successors, (266516), 45438 states have internal predecessors, (266516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:53,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45439 states to 45439 states and 266516 transitions. [2021-08-21 12:12:53,115 INFO L78 Accepts]: Start accepts. Automaton has 45439 states and 266516 transitions. Word has length 31 [2021-08-21 12:12:53,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:53,115 INFO L470 AbstractCegarLoop]: Abstraction has 45439 states and 266516 transitions. [2021-08-21 12:12:53,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:53,116 INFO L276 IsEmpty]: Start isEmpty. Operand 45439 states and 266516 transitions. [2021-08-21 12:12:53,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:12:53,271 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:53,271 INFO L512 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] [2021-08-21 12:12:53,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-21 12:12:53,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-21 12:12:53,472 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 12:12:53,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:53,473 INFO L82 PathProgramCache]: Analyzing trace with hash 210097239, now seen corresponding path program 2 times [2021-08-21 12:12:53,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:53,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655523314] [2021-08-21 12:12:53,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:53,473 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:53,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:53,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:12:53,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:53,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655523314] [2021-08-21 12:12:53,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655523314] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:12:53,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:12:53,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 12:12:53,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910865944] [2021-08-21 12:12:53,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 12:12:53,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:53,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 12:12:53,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:12:53,525 INFO L87 Difference]: Start difference. First operand 45439 states and 266516 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:54,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:54,592 INFO L93 Difference]: Finished difference Result 55542 states and 319905 transitions. [2021-08-21 12:12:54,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 12:12:54,592 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 12:12:54,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:55,128 INFO L225 Difference]: With dead ends: 55542 [2021-08-21 12:12:55,128 INFO L226 Difference]: Without dead ends: 55066 [2021-08-21 12:12:55,128 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:12:55,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55066 states. [2021-08-21 12:12:56,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55066 to 48103. [2021-08-21 12:12:56,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48103 states, 48102 states have (on average 5.849070724709991) internal successors, (281352), 48102 states have internal predecessors, (281352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:57,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48103 states to 48103 states and 281352 transitions. [2021-08-21 12:12:57,379 INFO L78 Accepts]: Start accepts. Automaton has 48103 states and 281352 transitions. Word has length 31 [2021-08-21 12:12:57,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:57,379 INFO L470 AbstractCegarLoop]: Abstraction has 48103 states and 281352 transitions. [2021-08-21 12:12:57,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:57,379 INFO L276 IsEmpty]: Start isEmpty. Operand 48103 states and 281352 transitions. [2021-08-21 12:12:57,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:12:57,555 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:57,555 INFO L512 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] [2021-08-21 12:12:57,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-08-21 12:12:57,555 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 12:12:57,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:57,555 INFO L82 PathProgramCache]: Analyzing trace with hash 437026629, now seen corresponding path program 1 times [2021-08-21 12:12:57,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:57,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35607829] [2021-08-21 12:12:57,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:57,556 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:57,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:57,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:12:57,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:57,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35607829] [2021-08-21 12:12:57,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35607829] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:57,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074590499] [2021-08-21 12:12:57,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:57,609 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:57,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:12:57,610 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) [2021-08-21 12:12:57,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-21 12:12:57,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:57,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 12:12:57,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:12:58,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:12:58,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074590499] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:58,164 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:12:58,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 4 [2021-08-21 12:12:58,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484754826] [2021-08-21 12:12:58,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:12:58,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:58,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:12:58,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:12:58,165 INFO L87 Difference]: Start difference. First operand 48103 states and 281352 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 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) [2021-08-21 12:12:59,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:59,036 INFO L93 Difference]: Finished difference Result 56784 states and 326793 transitions. [2021-08-21 12:12:59,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:12:59,037 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 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 31 [2021-08-21 12:12:59,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:59,575 INFO L225 Difference]: With dead ends: 56784 [2021-08-21 12:12:59,575 INFO L226 Difference]: Without dead ends: 56381 [2021-08-21 12:12:59,575 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.1ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:12:59,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56381 states. [2021-08-21 12:13:01,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56381 to 50997. [2021-08-21 12:13:01,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50997 states, 50996 states have (on average 5.823652835516511) internal successors, (296983), 50996 states have internal predecessors, (296983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:01,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50997 states to 50997 states and 296983 transitions. [2021-08-21 12:13:01,954 INFO L78 Accepts]: Start accepts. Automaton has 50997 states and 296983 transitions. Word has length 31 [2021-08-21 12:13:01,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:01,955 INFO L470 AbstractCegarLoop]: Abstraction has 50997 states and 296983 transitions. [2021-08-21 12:13:01,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 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) [2021-08-21 12:13:01,957 INFO L276 IsEmpty]: Start isEmpty. Operand 50997 states and 296983 transitions. [2021-08-21 12:13:02,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:13:02,144 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:02,144 INFO L512 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] [2021-08-21 12:13:02,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-21 12:13:02,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-21 12:13:02,345 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 12:13:02,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:02,352 INFO L82 PathProgramCache]: Analyzing trace with hash 745215523, now seen corresponding path program 2 times [2021-08-21 12:13:02,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:02,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546747857] [2021-08-21 12:13:02,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:02,353 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:02,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:02,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:13:02,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:02,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546747857] [2021-08-21 12:13:02,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546747857] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:13:02,414 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:13:02,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 12:13:02,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238756364] [2021-08-21 12:13:02,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 12:13:02,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:02,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 12:13:02,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:13:02,415 INFO L87 Difference]: Start difference. First operand 50997 states and 296983 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:03,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:03,242 INFO L93 Difference]: Finished difference Result 58483 states and 336376 transitions. [2021-08-21 12:13:03,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 12:13:03,242 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 12:13:03,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:03,586 INFO L225 Difference]: With dead ends: 58483 [2021-08-21 12:13:03,586 INFO L226 Difference]: Without dead ends: 58080 [2021-08-21 12:13:03,586 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:13:03,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58080 states. [2021-08-21 12:13:05,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58080 to 53054. [2021-08-21 12:13:05,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53054 states, 53053 states have (on average 5.811565792697868) internal successors, (308321), 53053 states have internal predecessors, (308321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:05,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53054 states to 53054 states and 308321 transitions. [2021-08-21 12:13:05,832 INFO L78 Accepts]: Start accepts. Automaton has 53054 states and 308321 transitions. Word has length 31 [2021-08-21 12:13:05,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:05,832 INFO L470 AbstractCegarLoop]: Abstraction has 53054 states and 308321 transitions. [2021-08-21 12:13:05,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:05,833 INFO L276 IsEmpty]: Start isEmpty. Operand 53054 states and 308321 transitions. [2021-08-21 12:13:06,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 12:13:06,001 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:06,001 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:06,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-08-21 12:13:06,001 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 12:13:06,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:06,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1780866909, now seen corresponding path program 3 times [2021-08-21 12:13:06,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:06,002 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748455529] [2021-08-21 12:13:06,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:06,002 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:06,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:06,032 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:06,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:06,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748455529] [2021-08-21 12:13:06,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748455529] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:06,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489416141] [2021-08-21 12:13:06,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:13:06,032 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:06,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:06,037 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) [2021-08-21 12:13:06,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-21 12:13:06,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:13:06,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:13:06,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 12:13:06,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:06,656 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:06,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489416141] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:06,656 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:06,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-21 12:13:06,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109983845] [2021-08-21 12:13:06,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:13:06,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:06,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:13:06,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:13:06,657 INFO L87 Difference]: Start difference. First operand 53054 states and 308321 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:09,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:09,297 INFO L93 Difference]: Finished difference Result 166964 states and 963436 transitions. [2021-08-21 12:13:09,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:13:09,298 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 12:13:09,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:10,820 INFO L225 Difference]: With dead ends: 166964 [2021-08-21 12:13:10,820 INFO L226 Difference]: Without dead ends: 166964 [2021-08-21 12:13:10,821 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 413.8ms TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:13:11,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166964 states. [2021-08-21 12:13:14,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166964 to 71659. [2021-08-21 12:13:15,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71659 states, 71658 states have (on average 5.932080158530799) internal successors, (425081), 71658 states have internal predecessors, (425081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:15,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71659 states to 71659 states and 425081 transitions. [2021-08-21 12:13:15,951 INFO L78 Accepts]: Start accepts. Automaton has 71659 states and 425081 transitions. Word has length 33 [2021-08-21 12:13:15,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:15,951 INFO L470 AbstractCegarLoop]: Abstraction has 71659 states and 425081 transitions. [2021-08-21 12:13:15,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:15,952 INFO L276 IsEmpty]: Start isEmpty. Operand 71659 states and 425081 transitions. [2021-08-21 12:13:16,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 12:13:16,196 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:16,196 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:16,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-21 12:13:16,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:16,397 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 12:13:16,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:16,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1104689831, now seen corresponding path program 4 times [2021-08-21 12:13:16,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:16,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837198636] [2021-08-21 12:13:16,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:16,398 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:16,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:16,433 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:16,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:16,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837198636] [2021-08-21 12:13:16,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837198636] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:16,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655178526] [2021-08-21 12:13:16,434 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:13:16,434 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:16,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:16,434 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) [2021-08-21 12:13:16,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-21 12:13:16,641 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:13:16,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:13:16,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 12:13:16,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:16,745 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:16,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655178526] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:16,745 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:16,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-21 12:13:16,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774081857] [2021-08-21 12:13:16,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:13:16,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:16,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:13:16,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:13:16,747 INFO L87 Difference]: Start difference. First operand 71659 states and 425081 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:18,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:18,994 INFO L93 Difference]: Finished difference Result 151965 states and 880181 transitions. [2021-08-21 12:13:18,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:13:18,997 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 12:13:18,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:20,397 INFO L225 Difference]: With dead ends: 151965 [2021-08-21 12:13:20,397 INFO L226 Difference]: Without dead ends: 151069 [2021-08-21 12:13:20,398 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 88.0ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:13:20,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151069 states. [2021-08-21 12:13:24,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151069 to 98035. [2021-08-21 12:13:25,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98035 states, 98034 states have (on average 6.051471938307118) internal successors, (593250), 98034 states have internal predecessors, (593250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:26,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98035 states to 98035 states and 593250 transitions. [2021-08-21 12:13:26,515 INFO L78 Accepts]: Start accepts. Automaton has 98035 states and 593250 transitions. Word has length 33 [2021-08-21 12:13:26,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:26,515 INFO L470 AbstractCegarLoop]: Abstraction has 98035 states and 593250 transitions. [2021-08-21 12:13:26,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:26,515 INFO L276 IsEmpty]: Start isEmpty. Operand 98035 states and 593250 transitions. [2021-08-21 12:13:27,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 12:13:27,388 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:27,388 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:27,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-21 12:13:27,604 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,SelfDestructingSolverStorable17 [2021-08-21 12:13:27,605 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 12:13:27,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:27,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1076846567, now seen corresponding path program 5 times [2021-08-21 12:13:27,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:27,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342689996] [2021-08-21 12:13:27,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:27,605 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:27,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:27,666 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:27,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:27,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342689996] [2021-08-21 12:13:27,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342689996] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:27,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129576529] [2021-08-21 12:13:27,667 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:13:27,667 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:27,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:27,668 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) [2021-08-21 12:13:27,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-21 12:13:27,968 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:13:27,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:13:27,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 12:13:27,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:28,127 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:28,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129576529] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:28,128 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:28,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-21 12:13:28,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448865333] [2021-08-21 12:13:28,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:13:28,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:28,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:13:28,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:13:28,129 INFO L87 Difference]: Start difference. First operand 98035 states and 593250 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:30,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:30,565 INFO L93 Difference]: Finished difference Result 145413 states and 850897 transitions. [2021-08-21 12:13:30,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:13:30,566 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 12:13:30,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:31,957 INFO L225 Difference]: With dead ends: 145413 [2021-08-21 12:13:31,957 INFO L226 Difference]: Without dead ends: 145413 [2021-08-21 12:13:31,958 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 87.5ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:13:32,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145413 states. [2021-08-21 12:13:36,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145413 to 96954. [2021-08-21 12:13:37,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96954 states, 96953 states have (on average 6.02823017338298) internal successors, (584455), 96953 states have internal predecessors, (584455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:37,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96954 states to 96954 states and 584455 transitions. [2021-08-21 12:13:37,988 INFO L78 Accepts]: Start accepts. Automaton has 96954 states and 584455 transitions. Word has length 33 [2021-08-21 12:13:37,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:37,988 INFO L470 AbstractCegarLoop]: Abstraction has 96954 states and 584455 transitions. [2021-08-21 12:13:37,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:37,988 INFO L276 IsEmpty]: Start isEmpty. Operand 96954 states and 584455 transitions. [2021-08-21 12:13:38,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 12:13:38,363 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:38,363 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:38,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-21 12:13:38,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:38,565 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 12:13:38,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:38,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1104372643, now seen corresponding path program 6 times [2021-08-21 12:13:38,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:38,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115325811] [2021-08-21 12:13:38,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:38,565 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:38,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:38,593 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:38,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:38,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115325811] [2021-08-21 12:13:38,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115325811] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:38,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606625072] [2021-08-21 12:13:38,594 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:13:38,594 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:38,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:38,594 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) [2021-08-21 12:13:38,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-21 12:13:38,811 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:13:38,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:13:38,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 12:13:38,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:38,902 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:38,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606625072] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:38,902 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:38,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-21 12:13:38,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268586880] [2021-08-21 12:13:38,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:13:38,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:38,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:13:38,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:13:38,904 INFO L87 Difference]: Start difference. First operand 96954 states and 584455 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:41,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:41,128 INFO L93 Difference]: Finished difference Result 133964 states and 783258 transitions. [2021-08-21 12:13:41,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:13:41,129 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 12:13:41,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:42,450 INFO L225 Difference]: With dead ends: 133964 [2021-08-21 12:13:42,452 INFO L226 Difference]: Without dead ends: 133804 [2021-08-21 12:13:42,452 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 254.5ms TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:13:42,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133804 states. [2021-08-21 12:13:46,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133804 to 97004. [2021-08-21 12:13:47,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97004 states, 97003 states have (on average 6.026844530581529) internal successors, (584622), 97003 states have internal predecessors, (584622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:48,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97004 states to 97004 states and 584622 transitions. [2021-08-21 12:13:48,150 INFO L78 Accepts]: Start accepts. Automaton has 97004 states and 584622 transitions. Word has length 33 [2021-08-21 12:13:48,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:48,151 INFO L470 AbstractCegarLoop]: Abstraction has 97004 states and 584622 transitions. [2021-08-21 12:13:48,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:48,151 INFO L276 IsEmpty]: Start isEmpty. Operand 97004 states and 584622 transitions. [2021-08-21 12:13:48,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 12:13:48,880 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:48,881 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:48,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-21 12:13:49,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:49,097 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 12:13:49,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:49,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1900679335, now seen corresponding path program 7 times [2021-08-21 12:13:49,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:49,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255891115] [2021-08-21 12:13:49,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:49,098 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:49,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:49,137 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:49,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:49,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255891115] [2021-08-21 12:13:49,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255891115] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:49,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473112522] [2021-08-21 12:13:49,138 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:13:49,138 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:49,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:49,139 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) [2021-08-21 12:13:49,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-21 12:13:49,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:49,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 12:13:49,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:49,566 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:49,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473112522] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:49,567 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:49,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-21 12:13:49,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897817048] [2021-08-21 12:13:49,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:13:49,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:49,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:13:49,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:13:49,568 INFO L87 Difference]: Start difference. First operand 97004 states and 584622 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:53,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:53,456 INFO L93 Difference]: Finished difference Result 227012 states and 1346306 transitions. [2021-08-21 12:13:53,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:13:53,457 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 12:13:53,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:55,597 INFO L225 Difference]: With dead ends: 227012 [2021-08-21 12:13:55,597 INFO L226 Difference]: Without dead ends: 227012 [2021-08-21 12:13:55,597 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 89.2ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:13:56,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227012 states. [2021-08-21 12:14:02,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227012 to 126089. [2021-08-21 12:14:02,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126089 states, 126088 states have (on average 6.168192056341603) internal successors, (777735), 126088 states have internal predecessors, (777735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:04,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126089 states to 126089 states and 777735 transitions. [2021-08-21 12:14:04,507 INFO L78 Accepts]: Start accepts. Automaton has 126089 states and 777735 transitions. Word has length 33 [2021-08-21 12:14:04,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:04,508 INFO L470 AbstractCegarLoop]: Abstraction has 126089 states and 777735 transitions. [2021-08-21 12:14:04,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:04,508 INFO L276 IsEmpty]: Start isEmpty. Operand 126089 states and 777735 transitions. [2021-08-21 12:14:05,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 12:14:05,340 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:05,340 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:05,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-21 12:14:05,552 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,SelfDestructingSolverStorable20 [2021-08-21 12:14:05,553 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 12:14:05,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:05,553 INFO L82 PathProgramCache]: Analyzing trace with hash -413595687, now seen corresponding path program 8 times [2021-08-21 12:14:05,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:05,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582223160] [2021-08-21 12:14:05,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:05,553 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:05,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:05,577 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:05,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:05,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582223160] [2021-08-21 12:14:05,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582223160] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:05,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370774355] [2021-08-21 12:14:05,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:14:05,577 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:05,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:05,578 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) [2021-08-21 12:14:05,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-21 12:14:05,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:14:05,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:05,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 12:14:05,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:05,930 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:05,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370774355] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:05,930 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:05,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-21 12:14:05,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100953466] [2021-08-21 12:14:05,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:14:05,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:05,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:14:05,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:14:05,931 INFO L87 Difference]: Start difference. First operand 126089 states and 777735 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:08,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:08,660 INFO L93 Difference]: Finished difference Result 173970 states and 1035526 transitions. [2021-08-21 12:14:08,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:14:08,660 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 12:14:08,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:10,255 INFO L225 Difference]: With dead ends: 173970 [2021-08-21 12:14:10,255 INFO L226 Difference]: Without dead ends: 173746 [2021-08-21 12:14:10,255 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 53.7ms TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:14:10,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173746 states. [2021-08-21 12:14:16,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173746 to 125926. [2021-08-21 12:14:16,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125926 states, 125925 states have (on average 6.16766329164185) internal successors, (776663), 125925 states have internal predecessors, (776663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:17,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125926 states to 125926 states and 776663 transitions. [2021-08-21 12:14:17,946 INFO L78 Accepts]: Start accepts. Automaton has 125926 states and 776663 transitions. Word has length 33 [2021-08-21 12:14:17,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:17,946 INFO L470 AbstractCegarLoop]: Abstraction has 125926 states and 776663 transitions. [2021-08-21 12:14:17,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:17,946 INFO L276 IsEmpty]: Start isEmpty. Operand 125926 states and 776663 transitions. [2021-08-21 12:14:18,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 12:14:18,985 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:18,985 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:19,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-21 12:14:19,203 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,SelfDestructingSolverStorable21 [2021-08-21 12:14:19,203 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 12:14:19,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:19,203 INFO L82 PathProgramCache]: Analyzing trace with hash -394078123, now seen corresponding path program 9 times [2021-08-21 12:14:19,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:19,204 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752934848] [2021-08-21 12:14:19,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:19,204 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:19,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:19,265 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:19,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:19,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752934848] [2021-08-21 12:14:19,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752934848] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:19,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435594125] [2021-08-21 12:14:19,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:14:19,265 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:19,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:19,277 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) [2021-08-21 12:14:19,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-21 12:14:19,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:14:19,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:19,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 12:14:19,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:19,667 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:19,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435594125] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:19,668 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:19,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-21 12:14:19,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339354363] [2021-08-21 12:14:19,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:14:19,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:19,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:14:19,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:14:19,669 INFO L87 Difference]: Start difference. First operand 125926 states and 776663 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 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) [2021-08-21 12:14:23,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:23,268 INFO L93 Difference]: Finished difference Result 199329 states and 1186134 transitions. [2021-08-21 12:14:23,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:14:23,268 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 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 33 [2021-08-21 12:14:23,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:25,311 INFO L225 Difference]: With dead ends: 199329 [2021-08-21 12:14:25,312 INFO L226 Difference]: Without dead ends: 199329 [2021-08-21 12:14:25,312 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 83.6ms TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:14:25,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199329 states. [2021-08-21 12:14:32,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199329 to 128232. [2021-08-21 12:14:32,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128232 states, 128231 states have (on average 6.171487393843922) internal successors, (791376), 128231 states have internal predecessors, (791376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:33,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128232 states to 128232 states and 791376 transitions. [2021-08-21 12:14:33,508 INFO L78 Accepts]: Start accepts. Automaton has 128232 states and 791376 transitions. Word has length 33 [2021-08-21 12:14:33,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:33,508 INFO L470 AbstractCegarLoop]: Abstraction has 128232 states and 791376 transitions. [2021-08-21 12:14:33,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 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) [2021-08-21 12:14:33,508 INFO L276 IsEmpty]: Start isEmpty. Operand 128232 states and 791376 transitions. [2021-08-21 12:14:34,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 12:14:34,314 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:34,314 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:34,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-21 12:14:34,515 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,SelfDestructingSolverStorable22 [2021-08-21 12:14:34,515 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 12:14:34,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:34,516 INFO L82 PathProgramCache]: Analyzing trace with hash -366552047, now seen corresponding path program 10 times [2021-08-21 12:14:34,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:34,516 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568924721] [2021-08-21 12:14:34,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:34,516 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:34,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:34,545 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:34,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:34,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568924721] [2021-08-21 12:14:34,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568924721] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:34,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083354898] [2021-08-21 12:14:34,545 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:14:34,545 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:34,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:34,546 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) [2021-08-21 12:14:34,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-21 12:14:34,808 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:14:34,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:34,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 12:14:34,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:34,891 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:34,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083354898] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:34,891 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:34,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-21 12:14:34,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883491425] [2021-08-21 12:14:34,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:14:34,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:34,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:14:34,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:14:34,893 INFO L87 Difference]: Start difference. First operand 128232 states and 791376 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 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) [2021-08-21 12:14:38,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:38,485 INFO L93 Difference]: Finished difference Result 216985 states and 1280323 transitions. [2021-08-21 12:14:38,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:14:38,495 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 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 33 [2021-08-21 12:14:38,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:40,603 INFO L225 Difference]: With dead ends: 216985 [2021-08-21 12:14:40,603 INFO L226 Difference]: Without dead ends: 216825 [2021-08-21 12:14:40,604 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 63.7ms TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:14:41,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216825 states. [2021-08-21 12:14:47,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216825 to 128330. [2021-08-21 12:14:48,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128330 states, 128329 states have (on average 6.170133017478512) internal successors, (791807), 128329 states have internal predecessors, (791807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:49,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128330 states to 128330 states and 791807 transitions. [2021-08-21 12:14:49,937 INFO L78 Accepts]: Start accepts. Automaton has 128330 states and 791807 transitions. Word has length 33 [2021-08-21 12:14:49,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:49,937 INFO L470 AbstractCegarLoop]: Abstraction has 128330 states and 791807 transitions. [2021-08-21 12:14:49,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 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) [2021-08-21 12:14:49,938 INFO L276 IsEmpty]: Start isEmpty. Operand 128330 states and 791807 transitions. [2021-08-21 12:14:50,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 12:14:50,751 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:50,751 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:50,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-21 12:14:50,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:50,965 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 12:14:50,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:50,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1467110297, now seen corresponding path program 11 times [2021-08-21 12:14:50,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:50,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764160654] [2021-08-21 12:14:50,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:50,965 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:50,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:51,010 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:51,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:51,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764160654] [2021-08-21 12:14:51,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764160654] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:51,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766729037] [2021-08-21 12:14:51,011 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:14:51,011 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:51,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:51,014 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) [2021-08-21 12:14:51,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-21 12:14:51,299 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:14:51,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:51,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 12:14:51,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:51,665 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:51,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766729037] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:51,666 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:51,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-21 12:14:51,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762441336] [2021-08-21 12:14:51,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:14:51,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:51,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:14:51,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:14:51,667 INFO L87 Difference]: Start difference. First operand 128330 states and 791807 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 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) [2021-08-21 12:14:55,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:55,400 INFO L93 Difference]: Finished difference Result 212002 states and 1272275 transitions. [2021-08-21 12:14:55,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:14:55,401 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 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 33 [2021-08-21 12:14:55,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:58,156 INFO L225 Difference]: With dead ends: 212002 [2021-08-21 12:14:58,156 INFO L226 Difference]: Without dead ends: 212002 [2021-08-21 12:14:58,157 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 121.3ms TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:14:58,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212002 states. [2021-08-21 12:15:05,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212002 to 140596. [2021-08-21 12:15:05,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140596 states, 140595 states have (on average 6.156221771755752) internal successors, (865534), 140595 states have internal predecessors, (865534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:07,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140596 states to 140596 states and 865534 transitions. [2021-08-21 12:15:07,746 INFO L78 Accepts]: Start accepts. Automaton has 140596 states and 865534 transitions. Word has length 33 [2021-08-21 12:15:07,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:07,746 INFO L470 AbstractCegarLoop]: Abstraction has 140596 states and 865534 transitions. [2021-08-21 12:15:07,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 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) [2021-08-21 12:15:07,746 INFO L276 IsEmpty]: Start isEmpty. Operand 140596 states and 865534 transitions. [2021-08-21 12:15:08,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 12:15:08,663 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:08,663 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:08,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-21 12:15:08,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:08,879 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 12:15:08,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:08,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1869736713, now seen corresponding path program 12 times [2021-08-21 12:15:08,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:08,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125237346] [2021-08-21 12:15:08,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:08,880 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:08,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:08,934 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:08,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:08,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125237346] [2021-08-21 12:15:08,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125237346] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:08,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130288127] [2021-08-21 12:15:08,935 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:15:08,935 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:08,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:08,949 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) [2021-08-21 12:15:09,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-21 12:15:09,541 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:15:09,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:15:09,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 12:15:09,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:09,677 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:09,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130288127] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:09,677 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:09,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-21 12:15:09,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268632331] [2021-08-21 12:15:09,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:15:09,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:09,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:15:09,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:15:09,679 INFO L87 Difference]: Start difference. First operand 140596 states and 865534 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 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) [2021-08-21 12:15:14,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:14,089 INFO L93 Difference]: Finished difference Result 227249 states and 1340487 transitions. [2021-08-21 12:15:14,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:15:14,089 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 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 33 [2021-08-21 12:15:14,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:16,455 INFO L225 Difference]: With dead ends: 227249 [2021-08-21 12:15:16,455 INFO L226 Difference]: Without dead ends: 226769 [2021-08-21 12:15:16,455 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 84.5ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:15:16,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226769 states. [2021-08-21 12:15:24,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226769 to 146902. [2021-08-21 12:15:24,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146902 states, 146901 states have (on average 6.137010639818653) internal successors, (901533), 146901 states have internal predecessors, (901533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:26,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146902 states to 146902 states and 901533 transitions. [2021-08-21 12:15:26,946 INFO L78 Accepts]: Start accepts. Automaton has 146902 states and 901533 transitions. Word has length 33 [2021-08-21 12:15:26,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:26,946 INFO L470 AbstractCegarLoop]: Abstraction has 146902 states and 901533 transitions. [2021-08-21 12:15:26,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 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) [2021-08-21 12:15:26,947 INFO L276 IsEmpty]: Start isEmpty. Operand 146902 states and 901533 transitions. [2021-08-21 12:15:28,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 12:15:28,239 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:28,239 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:28,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-21 12:15:28,440 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,SelfDestructingSolverStorable25 [2021-08-21 12:15:28,440 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 12:15:28,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:28,440 INFO L82 PathProgramCache]: Analyzing trace with hash -446070165, now seen corresponding path program 3 times [2021-08-21 12:15:28,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:28,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671759633] [2021-08-21 12:15:28,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:28,441 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:28,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:28,483 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:28,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:28,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671759633] [2021-08-21 12:15:28,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671759633] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:28,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445592671] [2021-08-21 12:15:28,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:15:28,484 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:28,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:28,488 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) [2021-08-21 12:15:28,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-21 12:15:28,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:15:28,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:15:28,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 12:15:28,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:28,927 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:28,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445592671] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:28,927 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:28,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-21 12:15:28,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644444859] [2021-08-21 12:15:28,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:15:28,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:28,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:15:28,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:15:28,928 INFO L87 Difference]: Start difference. First operand 146902 states and 901533 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 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) [2021-08-21 12:15:39,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:39,945 INFO L93 Difference]: Finished difference Result 536851 states and 3267778 transitions. [2021-08-21 12:15:39,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:15:39,945 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 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 33 [2021-08-21 12:15:39,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:49,607 INFO L225 Difference]: With dead ends: 536851 [2021-08-21 12:15:49,607 INFO L226 Difference]: Without dead ends: 536851 [2021-08-21 12:15:49,607 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 132.0ms TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:15:50,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536851 states. [2021-08-21 12:16:08,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536851 to 223496. [2021-08-21 12:16:09,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223496 states, 223495 states have (on average 6.274547529027495) internal successors, (1402330), 223495 states have internal predecessors, (1402330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:12,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223496 states to 223496 states and 1402330 transitions. [2021-08-21 12:16:12,709 INFO L78 Accepts]: Start accepts. Automaton has 223496 states and 1402330 transitions. Word has length 33 [2021-08-21 12:16:12,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:16:12,710 INFO L470 AbstractCegarLoop]: Abstraction has 223496 states and 1402330 transitions. [2021-08-21 12:16:12,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 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) [2021-08-21 12:16:12,710 INFO L276 IsEmpty]: Start isEmpty. Operand 223496 states and 1402330 transitions. [2021-08-21 12:16:14,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 12:16:14,627 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:16:14,627 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:16:14,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-21 12:16:14,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-21 12:16:14,841 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 12:16:14,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:16:14,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1908740565, now seen corresponding path program 4 times [2021-08-21 12:16:14,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:16:14,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029656804] [2021-08-21 12:16:14,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:16:14,841 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:16:14,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:14,886 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:14,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:16:14,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029656804] [2021-08-21 12:16:14,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029656804] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:14,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674914305] [2021-08-21 12:16:14,887 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:16:14,887 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:14,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:16:14,888 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) [2021-08-21 12:16:14,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-21 12:16:15,515 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:16:15,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:16:15,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 12:16:15,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:16:15,653 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:15,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674914305] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:15,654 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:16:15,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-21 12:16:15,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010779426] [2021-08-21 12:16:15,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:16:15,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:16:15,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:16:15,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:16:15,654 INFO L87 Difference]: Start difference. First operand 223496 states and 1402330 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 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)