/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-Delay.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp2x6.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 17:44:57,391 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 17:44:57,392 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 17:44:57,415 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-21 17:44:57,416 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-21 17:44:57,419 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-21 17:44:57,422 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-21 17:44:57,426 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-21 17:44:57,428 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-21 17:44:57,431 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-21 17:44:57,432 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-21 17:44:57,433 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-21 17:44:57,433 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-21 17:44:57,434 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-21 17:44:57,436 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-21 17:44:57,437 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-21 17:44:57,437 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-21 17:44:57,438 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-21 17:44:57,442 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-21 17:44:57,448 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-21 17:44:57,450 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-21 17:44:57,451 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-21 17:44:57,452 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-21 17:44:57,453 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-21 17:44:57,461 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-21 17:44:57,461 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-21 17:44:57,462 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-21 17:44:57,463 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-21 17:44:57,463 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-21 17:44:57,464 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-21 17:44:57,464 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-21 17:44:57,465 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-21 17:44:57,466 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-21 17:44:57,466 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-21 17:44:57,467 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-21 17:44:57,467 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-21 17:44:57,468 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-21 17:44:57,468 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-21 17:44:57,468 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-21 17:44:57,468 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-21 17:44:57,469 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-21 17:44:57,470 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-Delay.epf [2021-08-21 17:44:57,498 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 17:44:57,499 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 17:44:57,501 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 17:44:57,501 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 17:44:57,501 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 17:44:57,502 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 17:44:57,502 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 17:44:57,502 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 17:44:57,502 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 17:44:57,502 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 17:44:57,503 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 17:44:57,503 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 17:44:57,503 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 17:44:57,503 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 17:44:57,503 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 17:44:57,503 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 17:44:57,503 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 17:44:57,504 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 17:44:57,504 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 17:44:57,504 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 17:44:57,504 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 17:44:57,504 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 17:44:57,504 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 17:44:57,504 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 17:44:57,505 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 17:44:57,505 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 17:44:57,505 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 17:44:57,505 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 17:44:57,505 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 17:44:57,505 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-21 17:44:57,505 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 17:44:57,769 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 17:44:57,783 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 17:44:57,785 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 17:44:57,785 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 17:44:57,787 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 17:44:57,787 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp2x6.wvr.bpl [2021-08-21 17:44:57,788 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp2x6.wvr.bpl' [2021-08-21 17:44:57,808 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 17:44:57,809 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 17:44:57,811 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 17:44:57,811 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 17:44:57,811 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 17:44:57,820 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "exp2x6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:44:57" (1/1) ... [2021-08-21 17:44:57,826 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "exp2x6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:44:57" (1/1) ... [2021-08-21 17:44:57,831 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 17:44:57,832 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 17:44:57,832 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 17:44:57,832 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 17:44:57,837 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "exp2x6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:44:57" (1/1) ... [2021-08-21 17:44:57,838 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "exp2x6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:44:57" (1/1) ... [2021-08-21 17:44:57,839 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "exp2x6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:44:57" (1/1) ... [2021-08-21 17:44:57,840 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "exp2x6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:44:57" (1/1) ... [2021-08-21 17:44:57,843 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "exp2x6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:44:57" (1/1) ... [2021-08-21 17:44:57,846 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "exp2x6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:44:57" (1/1) ... [2021-08-21 17:44:57,847 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "exp2x6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:44:57" (1/1) ... [2021-08-21 17:44:57,849 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 17:44:57,849 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 17:44:57,849 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 17:44:57,849 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 17:44:57,851 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "exp2x6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:44:57" (1/1) ... [2021-08-21 17:44:57,855 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 17:44:57,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:44:57,869 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 17:44:57,884 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 17:44:57,900 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 17:44:57,901 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 17:44:57,901 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 17:44:57,901 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 17:44:57,901 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 17:44:57,901 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 17:44:57,901 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 17:44:57,901 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 17:44:57,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 17:44:57,901 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-21 17:44:57,901 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-21 17:44:57,902 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-21 17:44:57,902 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-08-21 17:44:57,902 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-08-21 17:44:57,902 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-08-21 17:44:57,902 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 17:44:58,033 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 17:44:58,033 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-21 17:44:58,035 INFO L202 PluginConnector]: Adding new model exp2x6.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:44:58 BoogieIcfgContainer [2021-08-21 17:44:58,035 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 17:44:58,036 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 17:44:58,036 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 17:44:58,038 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 17:44:58,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp2x6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:44:57" (1/2) ... [2021-08-21 17:44:58,039 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d201bd4 and model type exp2x6.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:44:58, skipping insertion in model container [2021-08-21 17:44:58,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp2x6.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:44:58" (2/2) ... [2021-08-21 17:44:58,058 INFO L111 eAbstractionObserver]: Analyzing ICFG exp2x6.wvr.bpl [2021-08-21 17:44:58,061 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 17:44:58,061 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 17:44:58,061 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 17:44:58,061 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 17:44:58,104 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-08-21 17:44:58,131 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 17:44:58,136 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 17:44:58,136 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-08-21 17:44:58,372 INFO L276 IsEmpty]: Start isEmpty. Operand has 3204 states, 2510 states have (on average 1.4617529880478088) internal successors, (3669), 3203 states have internal predecessors, (3669), 0 states have call successors, (0), 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 17:44:58,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 17:44:58,392 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:44:58,392 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:44:58,393 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 17:44:58,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:44:58,396 INFO L82 PathProgramCache]: Analyzing trace with hash 680181619, now seen corresponding path program 1 times [2021-08-21 17:44:58,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:44:58,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355466514] [2021-08-21 17:44:58,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:44:58,402 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:44:58,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:44:58,533 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 17:44:58,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:44:58,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355466514] [2021-08-21 17:44:58,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355466514] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:44:58,534 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:44:58,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 17:44:58,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441363718] [2021-08-21 17:44:58,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 17:44:58,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:44:58,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 17:44:58,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 17:44:58,551 INFO L87 Difference]: Start difference. First operand has 3204 states, 2510 states have (on average 1.4617529880478088) internal successors, (3669), 3203 states have internal predecessors, (3669), 0 states have call successors, (0), 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 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:58,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:44:58,647 INFO L93 Difference]: Finished difference Result 3629 states and 4205 transitions. [2021-08-21 17:44:58,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 17:44:58,648 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 17:44:58,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:44:58,666 INFO L225 Difference]: With dead ends: 3629 [2021-08-21 17:44:58,666 INFO L226 Difference]: Without dead ends: 1158 [2021-08-21 17:44:58,667 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 17:44:58,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1158 states. [2021-08-21 17:44:58,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1158 to 1110. [2021-08-21 17:44:58,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1110 states, 1109 states have (on average 1.2623985572587917) internal successors, (1400), 1109 states have internal predecessors, (1400), 0 states have call successors, (0), 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 17:44:58,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1110 states to 1110 states and 1400 transitions. [2021-08-21 17:44:58,735 INFO L78 Accepts]: Start accepts. Automaton has 1110 states and 1400 transitions. Word has length 19 [2021-08-21 17:44:58,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:44:58,736 INFO L470 AbstractCegarLoop]: Abstraction has 1110 states and 1400 transitions. [2021-08-21 17:44:58,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:58,736 INFO L276 IsEmpty]: Start isEmpty. Operand 1110 states and 1400 transitions. [2021-08-21 17:44:58,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 17:44:58,739 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:44:58,739 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] [2021-08-21 17:44:58,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 17:44:58,739 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 17:44:58,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:44:58,742 INFO L82 PathProgramCache]: Analyzing trace with hash -294306679, now seen corresponding path program 1 times [2021-08-21 17:44:58,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:44:58,742 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950366767] [2021-08-21 17:44:58,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:44:58,743 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:44:58,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:44:58,848 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 17:44:58,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:44:58,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950366767] [2021-08-21 17:44:58,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950366767] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:44:58,849 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:44:58,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 17:44:58,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633136517] [2021-08-21 17:44:58,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 17:44:58,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:44:58,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 17:44:58,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 17:44:58,854 INFO L87 Difference]: Start difference. First operand 1110 states and 1400 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 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 17:44:58,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:44:58,945 INFO L93 Difference]: Finished difference Result 1875 states and 2354 transitions. [2021-08-21 17:44:58,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 17:44:58,946 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 17:44:58,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:44:58,951 INFO L225 Difference]: With dead ends: 1875 [2021-08-21 17:44:58,951 INFO L226 Difference]: Without dead ends: 1875 [2021-08-21 17:44:58,952 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 17:44:58,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1875 states. [2021-08-21 17:44:58,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1875 to 1295. [2021-08-21 17:44:58,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1295 states, 1294 states have (on average 1.2642967542503865) internal successors, (1636), 1294 states have internal predecessors, (1636), 0 states have call successors, (0), 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 17:44:58,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1295 states to 1295 states and 1636 transitions. [2021-08-21 17:44:58,980 INFO L78 Accepts]: Start accepts. Automaton has 1295 states and 1636 transitions. Word has length 24 [2021-08-21 17:44:58,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:44:58,980 INFO L470 AbstractCegarLoop]: Abstraction has 1295 states and 1636 transitions. [2021-08-21 17:44:58,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 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 17:44:58,981 INFO L276 IsEmpty]: Start isEmpty. Operand 1295 states and 1636 transitions. [2021-08-21 17:44:58,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 17:44:58,983 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:44:58,984 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] [2021-08-21 17:44:58,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 17:44:58,985 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 17:44:58,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:44:58,986 INFO L82 PathProgramCache]: Analyzing trace with hash 210680898, now seen corresponding path program 1 times [2021-08-21 17:44:58,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:44:58,987 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370354026] [2021-08-21 17:44:58,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:44:58,987 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:44:59,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:44:59,047 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 17:44:59,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:44:59,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370354026] [2021-08-21 17:44:59,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370354026] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:44:59,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939538744] [2021-08-21 17:44:59,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:44:59,049 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:44:59,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:44:59,050 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 17:44:59,069 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 17:44:59,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:44:59,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-21 17:44:59,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:44:59,198 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 17:44:59,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939538744] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:44:59,199 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:44:59,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-08-21 17:44:59,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316280206] [2021-08-21 17:44:59,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 17:44:59,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:44:59,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 17:44:59,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-21 17:44:59,209 INFO L87 Difference]: Start difference. First operand 1295 states and 1636 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 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 17:44:59,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:44:59,278 INFO L93 Difference]: Finished difference Result 1812 states and 2294 transitions. [2021-08-21 17:44:59,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 17:44:59,279 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 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 24 [2021-08-21 17:44:59,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:44:59,285 INFO L225 Difference]: With dead ends: 1812 [2021-08-21 17:44:59,285 INFO L226 Difference]: Without dead ends: 1812 [2021-08-21 17:44:59,285 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 27.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-21 17:44:59,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1812 states. [2021-08-21 17:44:59,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1812 to 1500. [2021-08-21 17:44:59,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1500 states, 1499 states have (on average 1.2721814543028687) internal successors, (1907), 1499 states have internal predecessors, (1907), 0 states have call successors, (0), 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 17:44:59,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1500 states to 1500 states and 1907 transitions. [2021-08-21 17:44:59,316 INFO L78 Accepts]: Start accepts. Automaton has 1500 states and 1907 transitions. Word has length 24 [2021-08-21 17:44:59,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:44:59,316 INFO L470 AbstractCegarLoop]: Abstraction has 1500 states and 1907 transitions. [2021-08-21 17:44:59,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 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 17:44:59,317 INFO L276 IsEmpty]: Start isEmpty. Operand 1500 states and 1907 transitions. [2021-08-21 17:44:59,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 17:44:59,319 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:44:59,319 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] [2021-08-21 17:44:59,339 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 17:44:59,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:44:59,531 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 17:44:59,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:44:59,532 INFO L82 PathProgramCache]: Analyzing trace with hash 91782931, now seen corresponding path program 1 times [2021-08-21 17:44:59,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:44:59,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294437625] [2021-08-21 17:44:59,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:44:59,532 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:44:59,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:44:59,564 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 17:44:59,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:44:59,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294437625] [2021-08-21 17:44:59,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294437625] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:44:59,565 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:44:59,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 17:44:59,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830675013] [2021-08-21 17:44:59,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 17:44:59,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:44:59,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 17:44:59,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 17:44:59,566 INFO L87 Difference]: Start difference. First operand 1500 states and 1907 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 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 17:44:59,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:44:59,646 INFO L93 Difference]: Finished difference Result 2050 states and 2789 transitions. [2021-08-21 17:44:59,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 17:44:59,646 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 17:44:59,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:44:59,651 INFO L225 Difference]: With dead ends: 2050 [2021-08-21 17:44:59,652 INFO L226 Difference]: Without dead ends: 2050 [2021-08-21 17:44:59,652 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 17:44:59,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2050 states. [2021-08-21 17:44:59,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2050 to 1834. [2021-08-21 17:44:59,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1834 states, 1833 states have (on average 1.375340971085652) internal successors, (2521), 1833 states have internal predecessors, (2521), 0 states have call successors, (0), 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 17:44:59,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1834 states to 1834 states and 2521 transitions. [2021-08-21 17:44:59,682 INFO L78 Accepts]: Start accepts. Automaton has 1834 states and 2521 transitions. Word has length 24 [2021-08-21 17:44:59,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:44:59,682 INFO L470 AbstractCegarLoop]: Abstraction has 1834 states and 2521 transitions. [2021-08-21 17:44:59,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 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 17:44:59,683 INFO L276 IsEmpty]: Start isEmpty. Operand 1834 states and 2521 transitions. [2021-08-21 17:44:59,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 17:44:59,686 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:44:59,686 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] [2021-08-21 17:44:59,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-21 17:44:59,686 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 17:44:59,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:44:59,686 INFO L82 PathProgramCache]: Analyzing trace with hash 825268492, now seen corresponding path program 1 times [2021-08-21 17:44:59,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:44:59,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416465780] [2021-08-21 17:44:59,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:44:59,687 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:44:59,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:44:59,717 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 17:44:59,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:44:59,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416465780] [2021-08-21 17:44:59,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416465780] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:44:59,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978458685] [2021-08-21 17:44:59,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:44:59,718 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:44:59,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:44:59,721 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 17:44:59,722 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 17:44:59,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:44:59,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-21 17:44:59,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:44:59,828 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 17:44:59,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978458685] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:44:59,829 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:44:59,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-08-21 17:44:59,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849976461] [2021-08-21 17:44:59,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 17:44:59,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:44:59,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 17:44:59,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-21 17:44:59,830 INFO L87 Difference]: Start difference. First operand 1834 states and 2521 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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 17:44:59,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:44:59,885 INFO L93 Difference]: Finished difference Result 2286 states and 3343 transitions. [2021-08-21 17:44:59,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 17:44:59,886 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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 24 [2021-08-21 17:44:59,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:44:59,891 INFO L225 Difference]: With dead ends: 2286 [2021-08-21 17:44:59,891 INFO L226 Difference]: Without dead ends: 2286 [2021-08-21 17:44:59,892 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 19.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-21 17:44:59,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2286 states. [2021-08-21 17:44:59,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2286 to 2084. [2021-08-21 17:44:59,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2084 states, 2083 states have (on average 1.4829572731637062) internal successors, (3089), 2083 states have internal predecessors, (3089), 0 states have call successors, (0), 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 17:44:59,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2084 states to 2084 states and 3089 transitions. [2021-08-21 17:44:59,922 INFO L78 Accepts]: Start accepts. Automaton has 2084 states and 3089 transitions. Word has length 24 [2021-08-21 17:44:59,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:44:59,922 INFO L470 AbstractCegarLoop]: Abstraction has 2084 states and 3089 transitions. [2021-08-21 17:44:59,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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 17:44:59,922 INFO L276 IsEmpty]: Start isEmpty. Operand 2084 states and 3089 transitions. [2021-08-21 17:44:59,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 17:44:59,925 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:44:59,925 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] [2021-08-21 17:44:59,943 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 17:45:00,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:45:00,141 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 17:45:00,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:45:00,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1511071873, now seen corresponding path program 2 times [2021-08-21 17:45:00,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:45:00,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990503018] [2021-08-21 17:45:00,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:45:00,143 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:45:00,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:45:00,166 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 17:45:00,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:45:00,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990503018] [2021-08-21 17:45:00,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990503018] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:45:00,167 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:45:00,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 17:45:00,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391284333] [2021-08-21 17:45:00,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 17:45:00,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:45:00,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 17:45:00,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-21 17:45:00,168 INFO L87 Difference]: Start difference. First operand 2084 states and 3089 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 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 17:45:00,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:45:00,198 INFO L93 Difference]: Finished difference Result 2374 states and 3495 transitions. [2021-08-21 17:45:00,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 17:45:00,198 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 17:45:00,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:45:00,204 INFO L225 Difference]: With dead ends: 2374 [2021-08-21 17:45:00,204 INFO L226 Difference]: Without dead ends: 2374 [2021-08-21 17:45:00,205 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-21 17:45:00,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2374 states. [2021-08-21 17:45:00,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2374 to 2154. [2021-08-21 17:45:00,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2154 states, 2153 states have (on average 1.4793311658151416) internal successors, (3185), 2153 states have internal predecessors, (3185), 0 states have call successors, (0), 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 17:45:00,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2154 states to 2154 states and 3185 transitions. [2021-08-21 17:45:00,246 INFO L78 Accepts]: Start accepts. Automaton has 2154 states and 3185 transitions. Word has length 24 [2021-08-21 17:45:00,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:45:00,246 INFO L470 AbstractCegarLoop]: Abstraction has 2154 states and 3185 transitions. [2021-08-21 17:45:00,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 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 17:45:00,247 INFO L276 IsEmpty]: Start isEmpty. Operand 2154 states and 3185 transitions. [2021-08-21 17:45:00,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 17:45:00,250 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:45:00,250 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] [2021-08-21 17:45:00,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-21 17:45:00,250 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 17:45:00,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:45:00,251 INFO L82 PathProgramCache]: Analyzing trace with hash 2049790425, now seen corresponding path program 2 times [2021-08-21 17:45:00,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:45:00,251 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836928515] [2021-08-21 17:45:00,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:45:00,251 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:45:00,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:45:00,273 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 17:45:00,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:45:00,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836928515] [2021-08-21 17:45:00,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836928515] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:45:00,274 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:45:00,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 17:45:00,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616359646] [2021-08-21 17:45:00,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 17:45:00,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:45:00,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 17:45:00,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-21 17:45:00,275 INFO L87 Difference]: Start difference. First operand 2154 states and 3185 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 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 17:45:00,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:45:00,302 INFO L93 Difference]: Finished difference Result 2358 states and 3439 transitions. [2021-08-21 17:45:00,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 17:45:00,302 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 17:45:00,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:45:00,308 INFO L225 Difference]: With dead ends: 2358 [2021-08-21 17:45:00,308 INFO L226 Difference]: Without dead ends: 2356 [2021-08-21 17:45:00,309 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-21 17:45:00,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2356 states. [2021-08-21 17:45:00,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2356 to 2156. [2021-08-21 17:45:00,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2156 states, 2155 states have (on average 1.4784222737819026) internal successors, (3186), 2155 states have internal predecessors, (3186), 0 states have call successors, (0), 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 17:45:00,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2156 states to 2156 states and 3186 transitions. [2021-08-21 17:45:00,343 INFO L78 Accepts]: Start accepts. Automaton has 2156 states and 3186 transitions. Word has length 24 [2021-08-21 17:45:00,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:45:00,343 INFO L470 AbstractCegarLoop]: Abstraction has 2156 states and 3186 transitions. [2021-08-21 17:45:00,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 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 17:45:00,343 INFO L276 IsEmpty]: Start isEmpty. Operand 2156 states and 3186 transitions. [2021-08-21 17:45:00,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 17:45:00,347 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:45:00,347 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 17:45:00,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-21 17:45:00,347 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 17:45:00,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:45:00,348 INFO L82 PathProgramCache]: Analyzing trace with hash -600507156, now seen corresponding path program 1 times [2021-08-21 17:45:00,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:45:00,348 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470248835] [2021-08-21 17:45:00,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:45:00,348 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:45:00,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:45:00,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:45:00,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:45:00,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470248835] [2021-08-21 17:45:00,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470248835] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:00,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083541951] [2021-08-21 17:45:00,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:45:00,470 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:45:00,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:45:00,471 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 17:45:00,472 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 17:45:00,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:45:00,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 17:45:00,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:45:01,350 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-08-21 17:45:01,410 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:01,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083541951] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:01,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:45:01,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 10 [2021-08-21 17:45:01,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471039896] [2021-08-21 17:45:01,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 17:45:01,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:45:01,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 17:45:01,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:45:01,413 INFO L87 Difference]: Start difference. First operand 2156 states and 3186 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 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 17:45:01,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:45:01,834 INFO L93 Difference]: Finished difference Result 2522 states and 3796 transitions. [2021-08-21 17:45:01,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 17:45:01,835 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have 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 17:45:01,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:45:01,841 INFO L225 Difference]: With dead ends: 2522 [2021-08-21 17:45:01,842 INFO L226 Difference]: Without dead ends: 2514 [2021-08-21 17:45:01,842 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 148.9ms TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:45:01,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-08-21 17:45:01,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 2221. [2021-08-21 17:45:01,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2221 states, 2220 states have (on average 1.5112612612612613) internal successors, (3355), 2220 states have internal predecessors, (3355), 0 states have call successors, (0), 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 17:45:01,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2221 states to 2221 states and 3355 transitions. [2021-08-21 17:45:01,874 INFO L78 Accepts]: Start accepts. Automaton has 2221 states and 3355 transitions. Word has length 29 [2021-08-21 17:45:01,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:45:01,875 INFO L470 AbstractCegarLoop]: Abstraction has 2221 states and 3355 transitions. [2021-08-21 17:45:01,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 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 17:45:01,875 INFO L276 IsEmpty]: Start isEmpty. Operand 2221 states and 3355 transitions. [2021-08-21 17:45:01,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 17:45:01,878 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:45:01,878 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 17:45:01,898 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 17:45:02,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:45:02,091 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 17:45:02,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:45:02,092 INFO L82 PathProgramCache]: Analyzing trace with hash 2060052762, now seen corresponding path program 2 times [2021-08-21 17:45:02,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:45:02,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227873470] [2021-08-21 17:45:02,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:45:02,092 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:45:02,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:45:02,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:45:02,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:45:02,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227873470] [2021-08-21 17:45:02,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227873470] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:02,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556274064] [2021-08-21 17:45:02,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:45:02,241 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:45:02,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:45:02,242 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 17:45:02,243 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 17:45:02,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:45:02,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:45:02,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 17:45:02,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:45:03,070 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-08-21 17:45:03,165 INFO L883 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-08-21 17:45:03,393 INFO L883 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-08-21 17:45:03,762 INFO L883 QuantifierPusher]: Run 40 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-08-21 17:45:04,212 INFO L883 QuantifierPusher]: Run 50 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-08-21 17:45:04,840 INFO L883 QuantifierPusher]: Run 60 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-08-21 17:45:05,675 INFO L883 QuantifierPusher]: Run 70 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-08-21 17:45:06,682 INFO L883 QuantifierPusher]: Run 80 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-08-21 17:45:07,881 INFO L883 QuantifierPusher]: Run 90 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-08-21 17:45:09,317 INFO L883 QuantifierPusher]: Run 100 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-08-21 17:45:11,087 INFO L883 QuantifierPusher]: Run 110 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-08-21 17:45:13,178 INFO L883 QuantifierPusher]: Run 120 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-08-21 17:45:15,650 INFO L883 QuantifierPusher]: Run 130 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-08-21 17:45:18,493 INFO L883 QuantifierPusher]: Run 140 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-08-21 17:45:21,769 INFO L883 QuantifierPusher]: Run 150 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-08-21 17:45:25,494 INFO L883 QuantifierPusher]: Run 160 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-08-21 17:45:29,702 INFO L883 QuantifierPusher]: Run 170 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-08-21 17:45:34,462 INFO L883 QuantifierPusher]: Run 180 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-08-21 17:45:39,734 INFO L883 QuantifierPusher]: Run 190 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-08-21 17:45:45,635 INFO L883 QuantifierPusher]: Run 200 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-08-21 17:45:52,160 INFO L883 QuantifierPusher]: Run 210 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-08-21 17:45:59,280 INFO L883 QuantifierPusher]: Run 220 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-08-21 17:46:07,154 INFO L883 QuantifierPusher]: Run 230 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-08-21 17:46:15,830 INFO L883 QuantifierPusher]: Run 240 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-08-21 17:46:25,128 INFO L883 QuantifierPusher]: Run 250 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-08-21 17:46:35,231 INFO L883 QuantifierPusher]: Run 260 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-08-21 17:46:46,116 INFO L883 QuantifierPusher]: Run 270 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-08-21 17:46:57,869 INFO L883 QuantifierPusher]: Run 280 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-08-21 17:47:10,544 INFO L883 QuantifierPusher]: Run 290 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-08-21 17:47:23,951 INFO L883 QuantifierPusher]: Run 300 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-08-21 17:47:38,320 INFO L883 QuantifierPusher]: Run 310 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-08-21 17:47:53,680 INFO L883 QuantifierPusher]: Run 320 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-08-21 17:48:10,023 INFO L883 QuantifierPusher]: Run 330 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-08-21 17:48:27,512 INFO L883 QuantifierPusher]: Run 340 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-08-21 17:48:45,903 INFO L883 QuantifierPusher]: Run 350 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-08-21 17:49:05,435 INFO L883 QuantifierPusher]: Run 360 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-08-21 17:49:26,090 INFO L883 QuantifierPusher]: Run 370 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-08-21 17:49:47,938 INFO L883 QuantifierPusher]: Run 380 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-08-21 17:50:11,284 INFO L883 QuantifierPusher]: Run 390 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-08-21 17:50:35,913 INFO L883 QuantifierPusher]: Run 400 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-08-21 17:51:01,721 INFO L883 QuantifierPusher]: Run 410 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-08-21 17:51:28,877 INFO L883 QuantifierPusher]: Run 420 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-08-21 17:51:57,637 INFO L883 QuantifierPusher]: Run 430 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-08-21 17:52:27,437 INFO L883 QuantifierPusher]: Run 440 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-08-21 17:52:58,438 INFO L883 QuantifierPusher]: Run 450 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-08-21 17:53:30,833 INFO L883 QuantifierPusher]: Run 460 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-08-21 17:54:04,685 INFO L883 QuantifierPusher]: Run 470 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-08-21 17:54:40,126 INFO L883 QuantifierPusher]: Run 480 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-08-21 17:55:17,110 INFO L883 QuantifierPusher]: Run 490 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-08-21 17:55:55,669 INFO L883 QuantifierPusher]: Run 500 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-08-21 17:56:36,308 INFO L883 QuantifierPusher]: Run 510 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-08-21 17:57:18,145 INFO L883 QuantifierPusher]: Run 520 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-08-21 17:58:01,671 INFO L883 QuantifierPusher]: Run 530 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-08-21 17:58:46,768 INFO L883 QuantifierPusher]: Run 540 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-08-21 17:59:33,784 INFO L883 QuantifierPusher]: Run 550 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. Received shutdown request... [2021-08-21 17:59:46,066 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-21 17:59:46,111 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-21 17:59:47,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 [2021-08-21 17:59:47,132 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 17:59:47,733 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-21 17:59:47,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-21 17:59:47,733 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 30 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while executing Executor. [2021-08-21 17:59:47,734 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-21 17:59:47,734 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-21 17:59:47,734 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-21 17:59:47,734 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3INUSE_VIOLATION [2021-08-21 17:59:47,737 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 17:59:47,737 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 17:59:47,738 INFO L202 PluginConnector]: Adding new model exp2x6.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 05:59:47 BasicIcfg [2021-08-21 17:59:47,738 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 17:59:47,739 INFO L168 Benchmark]: Toolchain (without parser) took 889929.65 ms. Allocated memory was 192.9 MB in the beginning and 727.7 MB in the end (delta: 534.8 MB). Free memory was 174.0 MB in the beginning and 517.8 MB in the end (delta: -343.8 MB). Peak memory consumption was 474.2 MB. Max. memory is 8.0 GB. [2021-08-21 17:59:47,739 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.38 ms. Allocated memory is still 192.9 MB. Free memory is still 175.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 17:59:47,739 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.94 ms. Allocated memory is still 192.9 MB. Free memory was 173.8 MB in the beginning and 172.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 17:59:47,739 INFO L168 Benchmark]: Boogie Preprocessor took 16.95 ms. Allocated memory is still 192.9 MB. Free memory was 172.4 MB in the beginning and 171.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 17:59:47,740 INFO L168 Benchmark]: RCFGBuilder took 185.63 ms. Allocated memory is still 192.9 MB. Free memory was 171.4 MB in the beginning and 158.4 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-08-21 17:59:47,740 INFO L168 Benchmark]: TraceAbstraction took 889701.93 ms. Allocated memory was 192.9 MB in the beginning and 727.7 MB in the end (delta: 534.8 MB). Free memory was 157.9 MB in the beginning and 517.8 MB in the end (delta: -359.8 MB). Peak memory consumption was 458.5 MB. Max. memory is 8.0 GB. [2021-08-21 17:59:47,741 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.38 ms. Allocated memory is still 192.9 MB. Free memory is still 175.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 19.94 ms. Allocated memory is still 192.9 MB. Free memory was 173.8 MB in the beginning and 172.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 16.95 ms. Allocated memory is still 192.9 MB. Free memory was 172.4 MB in the beginning and 171.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 185.63 ms. Allocated memory is still 192.9 MB. Free memory was 171.4 MB in the beginning and 158.4 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 889701.93 ms. Allocated memory was 192.9 MB in the beginning and 727.7 MB in the end (delta: 534.8 MB). Free memory was 157.9 MB in the beginning and 517.8 MB in the end (delta: -359.8 MB). Peak memory consumption was 458.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 10784, positive: 10318, positive conditional: 10318, positive unconditional: 0, negative: 466, negative conditional: 466, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 10318, positive: 10318, positive conditional: 0, positive unconditional: 10318, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 378, positive: 378, positive conditional: 0, positive unconditional: 378, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 378, positive: 378, positive conditional: 0, positive unconditional: 378, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 10318, positive: 9940, positive conditional: 0, positive unconditional: 9940, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 378, unknown conditional: 0, unknown unconditional: 378] , Statistics on independence cache: Total cache size (in pairs): 378, Positive cache size: 378, Positive conditional cache size: 0, Positive unconditional cache size: 378, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Independence queries for same thread: 466 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 72]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 30 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while executing Executor. - TimeoutResultAtElement [Line: 63]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 30 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while executing Executor. - TimeoutResultAtElement [Line: 63]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 30 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while executing Executor. - TimeoutResultAtElement [Line: 64]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 30 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while executing Executor. - TimeoutResultAtElement [Line: 65]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 30 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 74 locations, 5 error locations. Started 1 CEGAR loops. OverallTime: 889606.6ms, OverallIterations: 9, TraceHistogramMax: 1, EmptinessCheckTime: 50.6ms, AutomataDifference: 963.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 228.4ms, PartialOrderReductionTime: 218.2ms, HoareTripleCheckerStatistics: 342 SDtfs, 358 SDslu, 616 SDs, 0 SdLazy, 1018 SolverSat, 26 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 552.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 112 GetRequests, 75 SyntacticMatches, 7 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 233.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=3204occurred in iteration=0, InterpolantAutomatonStates: 44, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 285.5ms AutomataMinimizationTime, 8 MinimizatonAttempts, 2071 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 29.3ms SsaConstructionTime, 116.9ms SatisfiabilityAnalysisTime, 1425.5ms InterpolantComputationTime, 269 NumberOfCodeBlocks, 269 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 258 ConstructedInterpolants, 0 QuantifiedInterpolants, 2303 SizeOfPredicates, 6 NumberOfNonLiveVariables, 210 ConjunctsInSsa, 27 ConjunctsInUnsatCore, 11 InterpolantComputations, 5 PerfectInterpolantSequences, 6/12 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown